1 | // |
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2 | // Cforall Version 1.0.0 Copyright (C) 2019 University of Waterloo |
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3 | // |
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4 | // The contents of this file are covered under the licence agreement in the |
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5 | // file "LICENCE" distributed with Cforall. |
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6 | // |
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7 | // pthread.cfa -- |
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8 | // |
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9 | // Author : Zhenyan Zhu |
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10 | // Created On : Sat Aug 6 16:29:18 2022 |
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11 | // Last Modified By : |
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12 | // Last Modified On : |
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13 | // Update Count : |
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14 | // |
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15 | |
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16 | #define __cforall_thread__ |
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17 | |
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18 | #include <signal.h> |
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19 | #include <pthread.h> |
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20 | #include <errno.h> |
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21 | #include "locks.hfa" |
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22 | #include "bits/stack.hfa" |
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23 | |
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24 | |
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25 | #define check_nonnull(x) asm("": "+rm"(x)); if( x == 0p ) return EINVAL; |
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26 | |
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27 | /* pthread key, pthread once inner routine mutual exclusion */ |
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28 | static simple_owner_lock once_lock,key_lock,magic_mutex_check, concurrency_lock; |
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29 | |
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30 | //######################### Local Storage Helpers ######################### |
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31 | |
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32 | enum { PTHREAD_KEYS_MAX = 1024 }; |
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33 | |
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34 | struct pthread_values{ |
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35 | inline Seqable; |
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36 | void * value; |
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37 | bool in_use; |
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38 | }; |
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39 | |
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40 | static inline { |
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41 | pthread_values *& Back( pthread_values * n ) { |
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42 | return (pthread_values *)Back( (Seqable *)n ); |
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43 | } |
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44 | |
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45 | pthread_values *& Next( pthread_values * n ) { |
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46 | return (pthread_values *)Next( (Colable *)n ); |
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47 | } |
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48 | } |
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49 | |
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50 | struct pthread_keys { |
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51 | bool in_use; |
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52 | void (*destructor)( void * ); |
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53 | Sequence(pthread_values) threads; |
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54 | }; |
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55 | |
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56 | static void ?{}(pthread_keys& k) { |
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57 | k.threads{}; |
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58 | } |
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59 | |
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60 | // Create storage separately to ensure no constructors are called. |
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61 | static pthread_keys cfa_pthread_keys_storage[PTHREAD_KEYS_MAX] __attribute__((aligned (16))); |
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62 | |
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63 | static void init_pthread_storage() { |
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64 | for ( int i = 0; i < PTHREAD_KEYS_MAX; i++) { |
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65 | cfa_pthread_keys_storage[i]{}; |
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66 | } |
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67 | } |
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68 | |
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69 | #define cfa_pthread_keys ((pthread_keys *)cfa_pthread_keys_storage) |
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70 | |
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71 | /* Controlling the iterations of destructors for thread-specific data. */ |
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72 | #define _POSIX_THREAD_DESTRUCTOR_ITERATIONS 4 |
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73 | /* Number of iterations this implementation does. */ |
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74 | #define PTHREAD_DESTRUCTOR_ITERATIONS _POSIX_THREAD_DESTRUCTOR_ITERATIONS |
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75 | |
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76 | //######################### Parallelism Helpers ######################### |
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77 | |
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78 | struct Pthread_kernel_threads{ |
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79 | inline Colable; |
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80 | processor p; |
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81 | }; |
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82 | |
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83 | Pthread_kernel_threads *& Next( Pthread_kernel_threads * n ) { |
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84 | return (Pthread_kernel_threads *)Next( (Colable *)n ); |
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85 | } |
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86 | |
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87 | static Stack(Pthread_kernel_threads) cfa_pthreads_kernel_threads; |
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88 | static bool cfa_pthreads_kernel_threads_zero = false; // set to zero ? |
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89 | static int cfa_pthreads_no_kernel_threads = 1; // number of kernel threads |
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90 | |
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91 | |
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92 | //######################### Cond Helpers ######################### |
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93 | |
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94 | typedef pthread_cond_var(simple_owner_lock) cfa2pthr_cond_var_t; |
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95 | |
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96 | /* condvar helper routines */ |
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97 | static void init(pthread_cond_t * pcond) { |
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98 | static_assert(sizeof(pthread_cond_t) >= sizeof(cfa2pthr_cond_var_t),"sizeof(pthread_t) < sizeof(cfa2pthr_cond_var_t)"); |
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99 | cfa2pthr_cond_var_t * _cond = (cfa2pthr_cond_var_t*)pcond; |
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100 | ?{}(*_cond); |
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101 | } |
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102 | |
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103 | static cfa2pthr_cond_var_t * get(pthread_cond_t * pcond) { |
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104 | static_assert(sizeof(pthread_cond_t) >= sizeof(cfa2pthr_cond_var_t),"sizeof(pthread_t) < sizeof(cfa2pthr_cond_var_t)"); |
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105 | return (cfa2pthr_cond_var_t*)pcond; |
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106 | } |
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107 | |
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108 | static void destroy(pthread_cond_t* cond) { |
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109 | static_assert(sizeof(pthread_cond_t) >= sizeof(cfa2pthr_cond_var_t),"sizeof(pthread_t) < sizeof(cfa2pthr_cond_var_t)"); |
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110 | ^?{}(*get(cond)); |
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111 | } |
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112 | |
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113 | |
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114 | //######################### Mutex Helper ######################### |
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115 | |
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116 | /* mutex helper routines */ |
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117 | static void mutex_check(pthread_mutex_t* t) { |
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118 | // Use double check to improve performance. |
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119 | // Check is safe on x86; volatile prevents compiler reordering |
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120 | volatile pthread_mutex_t *const mutex_ = t; |
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121 | |
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122 | // SKULLDUGGERY: not a portable way to access the kind field, /usr/include/x86_64-linux-gnu/bits/pthreadtypes.h |
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123 | int _lock_val = ((pthread_mutex_t *)mutex_)->__data.__lock; |
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124 | |
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125 | // if pthread_mutex_t is initialized by PTHREAD_MUTEX_INITIALIZER, _lock_val should be 0 |
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126 | if ( _lock_val == 0 ) { |
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127 | lock(magic_mutex_check); |
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128 | _lock_val = ((pthread_mutex_t *)mutex_)->__data.__lock; |
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129 | if ( _lock_val == 0 ) { |
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130 | pthread_mutex_init( t, NULL ); |
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131 | } |
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132 | unlock(magic_mutex_check); |
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133 | } |
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134 | } // mutex_check |
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135 | |
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136 | |
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137 | static void init(pthread_mutex_t* plock) { |
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138 | static_assert(sizeof(pthread_mutex_t) >= sizeof(simple_owner_lock),"sizeof(pthread_mutex_t) < sizeof(simple_owner_lock)"); |
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139 | simple_owner_lock* _lock = (simple_owner_lock*)plock; |
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140 | ?{}(*_lock); |
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141 | } |
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142 | |
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143 | static simple_owner_lock* get(pthread_mutex_t* plock) { |
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144 | static_assert(sizeof(pthread_mutex_t) >= sizeof(simple_owner_lock),"sizeof(pthread_mutex_t) < sizeof(simple_owner_lock)"); |
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145 | return (simple_owner_lock*)plock; |
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146 | } |
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147 | |
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148 | static void destroy(pthread_mutex_t* plock) { |
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149 | static_assert(sizeof(pthread_mutex_t) >= sizeof(simple_owner_lock),"sizeof(pthread_mutex_t) < sizeof(simple_owner_lock)"); |
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150 | ^?{}(*get(plock)); |
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151 | } |
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152 | |
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153 | //######################### Attr helpers ######################### |
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154 | struct cfaPthread_attr_t { // thread attributes |
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155 | int contentionscope; |
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156 | int detachstate; |
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157 | size_t stacksize; |
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158 | void *stackaddr; |
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159 | int policy; |
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160 | int inheritsched; |
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161 | struct sched_param param; |
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162 | } typedef cfaPthread_attr_t; |
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163 | |
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164 | static const cfaPthread_attr_t default_attrs{ |
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165 | 0, |
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166 | 0, |
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167 | (size_t)65000, |
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168 | (void *)NULL, |
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169 | 0, |
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170 | 0, |
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171 | {0} |
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172 | }; |
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173 | |
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174 | static cfaPthread_attr_t* get(const pthread_attr_t* attr) { |
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175 | static_assert(sizeof(pthread_attr_t) >= sizeof(cfaPthread_attr_t),"sizeof(pthread_attr_t) < sizeof(cfaPthread_attr_t)"); |
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176 | return (cfaPthread_attr_t*)attr; |
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177 | } |
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178 | |
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179 | |
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180 | //######################### Threads Helper ######################### |
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181 | |
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182 | // exception for cancel_stack in pthread_exit |
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183 | exception pthread_exit_exp {}; |
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184 | static vtable(pthread_exit_exp) exp_vt; |
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185 | |
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186 | thread cfaPthread{ |
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187 | cfaPthread_attr_t attr; |
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188 | pthread_t pthreadId; |
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189 | |
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190 | // pthreads return value |
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191 | void *joinval; |
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192 | |
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193 | // pthread attributes |
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194 | pthread_attr_t pthread_attr; |
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195 | |
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196 | void *(*start_routine)(void *); |
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197 | void *start_arg; |
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198 | |
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199 | // thread local data |
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200 | pthread_values* pthreadData; |
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201 | |
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202 | // flag used for tryjoin |
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203 | bool isTerminated; |
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204 | }; |
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205 | |
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206 | /* thread part routines */ |
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207 | // cfaPthread entry point |
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208 | void main( cfaPthread & _thread ) with( _thread ) { |
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209 | joinval = start_routine( start_arg ); |
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210 | isTerminated = true; |
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211 | } |
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212 | |
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213 | static cfaPthread * lookup( pthread_t p ) { |
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214 | static_assert(sizeof(pthread_t) >= sizeof(cfaPthread*),"sizeof(pthread_t) < sizeof(cfaPthread*)"); |
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215 | return (cfaPthread*)p; |
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216 | } |
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217 | |
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218 | static void pthread_deletespecific_( pthread_values* values ) { // see uMachContext::invokeTask |
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219 | pthread_values* value; |
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220 | pthread_keys* key; |
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221 | bool destcalled = true; |
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222 | if (values != NULL) { |
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223 | for ( int attempts = 0; attempts < PTHREAD_DESTRUCTOR_ITERATIONS && destcalled ; attempts += 1 ) { |
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224 | destcalled = false; |
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225 | lock(key_lock); |
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226 | for ( int i = 0; i < PTHREAD_KEYS_MAX; i++) { |
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227 | // for each valid key |
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228 | if ( values[i].in_use) { |
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229 | value = &values[i]; |
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230 | key = &cfa_pthread_keys[i]; |
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231 | value->in_use = false; |
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232 | remove(key->threads, *value); |
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233 | // if a key value has a non-NULL destructor pointer, and the thread has a non-NULL value associated with that key, |
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234 | // the value of the key is set to NULL, and then the function pointed to is called with the previously associated value as its sole argument. |
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235 | if (value->value != NULL && key->destructor != NULL) { |
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236 | unlock(key_lock); |
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237 | key->destructor(value->value); // run destructor |
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238 | lock(key_lock); |
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239 | destcalled = true; |
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240 | } // if |
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241 | value->value = NULL; |
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242 | } // if |
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243 | } // for |
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244 | unlock(key_lock); |
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245 | } // for |
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246 | free(values); |
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247 | } // if |
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248 | } |
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249 | |
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250 | static void ^?{}(cfaPthread & mutex t) { |
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251 | // delete pthread local storage |
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252 | pthread_values * values = t.pthreadData; |
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253 | pthread_deletespecific_(values); |
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254 | } |
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255 | |
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256 | static void ?{}(cfaPthread &t, pthread_t* _thread, const pthread_attr_t * _attr,void *(*start_routine)(void *), void * arg) { |
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257 | static_assert(sizeof(pthread_t) >= sizeof(cfaPthread*), "pthread_t too small to hold a pointer: sizeof(pthread_t) < sizeof(cfaPthread*)"); |
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258 | |
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259 | // set up user thread stackSize |
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260 | cfaPthread_attr_t * attr = get(_attr); |
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261 | ((thread&)t) { attr ? attr->stacksize: DEFAULT_STACK_SIZE }; |
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262 | |
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263 | // initialize _thread & cfaPthread id |
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264 | *_thread = t.pthreadId = (pthread_t)(&t); |
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265 | |
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266 | // if attr null, self attr will be set as default_attrs; else set to attr |
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267 | t.attr = (attr != NULL ? *attr : default_attrs); |
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268 | |
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269 | // init start routine and arguments |
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270 | t.start_routine = start_routine; |
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271 | t.start_arg = arg; |
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272 | t.pthreadData = NULL; |
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273 | } |
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274 | |
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275 | |
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276 | extern "C"{ |
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277 | //######################### Pthread Attrs ######################### |
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278 | |
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279 | int pthread_attr_init(pthread_attr_t *attr) libcfa_public __THROW { |
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280 | cfaPthread_attr_t* _attr = get(attr); |
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281 | ?{}(*_attr, default_attrs); |
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282 | return 0; |
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283 | } |
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284 | int pthread_attr_destroy(pthread_attr_t *attr) libcfa_public __THROW { |
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285 | ^?{}(*get(attr)); |
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286 | return 0; |
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287 | } |
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288 | |
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289 | int pthread_attr_setscope( pthread_attr_t *attr, int contentionscope ) libcfa_public __THROW { |
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290 | get( attr )->contentionscope = contentionscope; |
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291 | return 0; |
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292 | } // pthread_attr_setscope |
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293 | |
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294 | int pthread_attr_getscope( const pthread_attr_t *attr, int *contentionscope ) libcfa_public __THROW { |
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295 | *contentionscope = get( attr )->contentionscope; |
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296 | return 0; |
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297 | } // pthread_attr_getscope |
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298 | |
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299 | int pthread_attr_setdetachstate( pthread_attr_t *attr, int detachstate ) libcfa_public __THROW { |
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300 | get( attr )->detachstate = detachstate; |
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301 | return 0; |
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302 | } // pthread_attr_setdetachstate |
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303 | |
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304 | int pthread_attr_getdetachstate( const pthread_attr_t *attr, int *detachstate ) libcfa_public __THROW { |
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305 | *detachstate = get( attr )->detachstate; |
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306 | return 0; |
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307 | } // pthread_attr_getdetachstate |
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308 | |
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309 | int pthread_attr_setstacksize( pthread_attr_t *attr, size_t stacksize ) libcfa_public __THROW { |
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310 | get( attr )->stacksize = stacksize; |
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311 | return 0; |
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312 | } // pthread_attr_setstacksize |
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313 | |
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314 | int pthread_attr_getstacksize( const pthread_attr_t *attr, size_t *stacksize ) libcfa_public __THROW { |
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315 | *stacksize = get( attr )->stacksize; |
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316 | return 0; |
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317 | } // pthread_attr_getstacksize |
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318 | |
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319 | int pthread_attr_getguardsize( const pthread_attr_t * /* attr */, size_t * /* guardsize */ ) libcfa_public __THROW { |
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320 | return 0; |
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321 | } // pthread_attr_getguardsize |
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322 | |
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323 | int pthread_attr_setguardsize( pthread_attr_t * /* attr */, size_t /* guardsize */ ) libcfa_public __THROW { |
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324 | return 0; |
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325 | } // pthread_attr_setguardsize |
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326 | |
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327 | int pthread_attr_setstackaddr( pthread_attr_t *attr, void *stackaddr ) libcfa_public __THROW { |
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328 | get( attr )->stackaddr = stackaddr; |
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329 | return 0; |
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330 | } // pthread_attr_setstackaddr |
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331 | |
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332 | int pthread_attr_getstackaddr( const pthread_attr_t *attr, void **stackaddr ) libcfa_public __THROW { |
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333 | *stackaddr = get( attr )->stackaddr; |
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334 | return 0; |
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335 | } // pthread_attr_getstackaddr |
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336 | |
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337 | int pthread_attr_setstack( pthread_attr_t *attr, void *stackaddr, size_t stacksize ) libcfa_public __THROW { |
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338 | get( attr )->stackaddr = stackaddr; |
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339 | get( attr )->stacksize = stacksize; |
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340 | return 0; |
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341 | } // pthread_attr_setstack |
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342 | |
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343 | int pthread_attr_getstack( const pthread_attr_t *attr, void **stackaddr, size_t *stacksize ) libcfa_public __THROW { |
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344 | *stackaddr = get( attr )->stackaddr; |
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345 | *stacksize = get( attr )->stacksize; |
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346 | return 0; |
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347 | } // pthread_attr_getstack |
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348 | |
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349 | // Initialize thread attribute *attr with attributes corresponding to the |
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350 | // already running thread threadID. It shall be called on unitialized attr |
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351 | // and destroyed with pthread_attr_destroy when no longer needed. |
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352 | int pthread_getattr_np( pthread_t threadID, pthread_attr_t *attr ) libcfa_public __THROW { // GNU extension |
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353 | check_nonnull(attr); |
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354 | |
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355 | // copy all fields |
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356 | *get(attr) = lookup( threadID )->attr; |
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357 | |
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358 | return 0; |
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359 | } // pthread_getattr_np |
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360 | |
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361 | |
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362 | //######################### Threads ######################### |
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363 | |
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364 | int pthread_create(pthread_t * _thread, const pthread_attr_t * attr, void *(*start_routine)(void *), void * arg) libcfa_public __THROW { |
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365 | cfaPthread *t = alloc(); |
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366 | (*t) {_thread, attr, start_routine, arg}; |
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367 | return 0; |
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368 | } |
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369 | |
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370 | |
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371 | int pthread_join(pthread_t _thread, void **value_ptr) libcfa_public __THROW { |
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372 | // if thread is invalid |
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373 | if (_thread == NULL) return EINVAL; |
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374 | if (_thread == pthread_self()) return EDEADLK; |
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375 | |
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376 | // get user thr pointer |
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377 | cfaPthread* p = lookup(_thread); |
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378 | try { |
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379 | join(*p); |
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380 | } |
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381 | // if thread called pthread_exit |
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382 | catchResume (ThreadCancelled(cfaPthread) * cancel) {} |
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383 | |
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384 | // fetch result |
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385 | if (value_ptr != NULL ) *value_ptr = p->joinval; |
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386 | delete(p); |
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387 | return 0; |
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388 | } |
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389 | |
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390 | int pthread_tryjoin_np(pthread_t _thread, void **value_ptr) libcfa_public __THROW { |
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391 | // if thread is invalid |
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392 | if (_thread == NULL) return EINVAL; |
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393 | if (_thread == pthread_self()) return EDEADLK; |
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394 | |
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395 | cfaPthread* p = lookup(_thread); |
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396 | |
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397 | // thread not finished ? |
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398 | if (!p->isTerminated) return EBUSY; |
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399 | |
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400 | join( *p ); |
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401 | |
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402 | if (value_ptr != NULL ) *value_ptr = p->joinval; |
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403 | delete(p); |
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404 | return 0; |
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405 | } |
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406 | |
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407 | pthread_t pthread_self(void) libcfa_public __THROW { |
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408 | return (pthread_t)((uintptr_t)active_thread() - (sizeof(cfaPthread) - sizeof(thread$))); |
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409 | } |
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410 | |
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411 | void pthread_exit(void * status) libcfa_public __THROW { |
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412 | pthread_t pid = pthread_self(); |
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413 | cfaPthread* _thread = (cfaPthread*)pid; |
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414 | _thread->joinval = status; // set return value |
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415 | _thread->isTerminated = 1; // set terminated flag |
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416 | cancel_stack((pthread_exit_exp) {&exp_vt}); |
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417 | } //pthread_exit_ |
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418 | |
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419 | int pthread_yield( void ) __THROW { // GNU extension |
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420 | yield(); |
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421 | return 0; |
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422 | } |
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423 | |
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424 | |
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425 | //######################### Mutex ######################### |
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426 | |
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427 | int pthread_mutex_init(pthread_mutex_t *_mutex, const pthread_mutexattr_t *attr) libcfa_public __THROW { |
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428 | check_nonnull(_mutex); |
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429 | init(_mutex); |
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430 | return 0; |
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431 | } //pthread_mutex_init_ |
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432 | |
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433 | |
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434 | int pthread_mutex_destroy(pthread_mutex_t *_mutex) libcfa_public __THROW { |
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435 | check_nonnull(_mutex); |
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436 | simple_owner_lock* _lock = get(_mutex); |
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437 | if (_lock->owner != NULL) { |
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438 | return EBUSY; |
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439 | } |
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440 | destroy(_mutex); |
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441 | return 0; |
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442 | } //pthread_mutex_destroy_ |
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443 | |
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444 | int pthread_mutex_lock(pthread_mutex_t *_mutex) libcfa_public __THROW { |
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445 | check_nonnull(_mutex); |
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446 | mutex_check(_mutex); |
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447 | simple_owner_lock* _lock = get(_mutex); |
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448 | lock(*_lock); |
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449 | return 0; |
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450 | } //pthread_mutex_lock_ |
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451 | |
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452 | int pthread_mutex_unlock(pthread_mutex_t *_mutex) libcfa_public __THROW { |
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453 | check_nonnull(_mutex); |
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454 | simple_owner_lock* _lock = get(_mutex); |
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455 | if (_lock->owner != active_thread()) { |
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456 | return EPERM; |
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457 | } // current thread does not hold the mutex |
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458 | unlock(*_lock); |
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459 | return 0; |
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460 | } //pthread_mutex_unlock_ |
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461 | |
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462 | int pthread_mutex_trylock(pthread_mutex_t *_mutex) libcfa_public __THROW { |
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463 | check_nonnull(_mutex); |
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464 | simple_owner_lock* _lock = get(_mutex); |
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465 | if (_lock->owner != active_thread() && _lock->owner != NULL) { |
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466 | return EBUSY; |
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467 | } // if mutex is owned |
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468 | lock(*_lock); |
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469 | return 0; |
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470 | } //pthread_mutex_trylock_ |
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471 | |
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472 | //######################### Conditional Variable ######################### |
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473 | |
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474 | /* conditional variable routines */ |
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475 | int pthread_cond_init(pthread_cond_t *cond, const pthread_condattr_t *attr) libcfa_public __THROW { |
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476 | check_nonnull(cond); |
---|
477 | init(cond); |
---|
478 | return 0; |
---|
479 | } //pthread_cond_init |
---|
480 | |
---|
481 | int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *_mutex) libcfa_public __THROW { |
---|
482 | check_nonnull(_mutex); |
---|
483 | check_nonnull(cond); |
---|
484 | wait(*get(cond), *get(_mutex)); |
---|
485 | return 0; |
---|
486 | } // pthread_cond_wait |
---|
487 | |
---|
488 | int pthread_cond_timedwait(pthread_cond_t * cond, pthread_mutex_t * _mutex, const struct timespec * abstime) libcfa_public __THROW { |
---|
489 | check_nonnull(_mutex); |
---|
490 | check_nonnull(cond); |
---|
491 | wait(*get(cond), *get(_mutex), *abstime); |
---|
492 | return 0; |
---|
493 | } // pthread_cond_timedwait |
---|
494 | |
---|
495 | int pthread_cond_signal(pthread_cond_t *cond) libcfa_public __THROW { |
---|
496 | check_nonnull(cond); |
---|
497 | return notify_one(*get(cond)); |
---|
498 | } // pthread_cond_signal |
---|
499 | |
---|
500 | int pthread_cond_broadcast(pthread_cond_t *cond) libcfa_public __THROW { |
---|
501 | check_nonnull(cond); |
---|
502 | return notify_all(*get(cond)); |
---|
503 | } // pthread_cond_broadcast |
---|
504 | |
---|
505 | int pthread_cond_destroy(pthread_cond_t *cond) libcfa_public __THROW { |
---|
506 | check_nonnull(cond); |
---|
507 | destroy(cond); |
---|
508 | return 0; |
---|
509 | } // pthread_cond_destroy |
---|
510 | |
---|
511 | |
---|
512 | |
---|
513 | //######################### Local storage ######################### |
---|
514 | |
---|
515 | int pthread_once(pthread_once_t *once_control, void (*init_routine)(void)) libcfa_public __THROW { |
---|
516 | static_assert(sizeof(pthread_once_t) >= sizeof(int),"sizeof(pthread_once_t) < sizeof(int)"); |
---|
517 | check_nonnull(once_control); |
---|
518 | check_nonnull(init_routine); |
---|
519 | lock(once_lock); |
---|
520 | if ( *((int *)once_control) == 0 ) { |
---|
521 | init_routine(); |
---|
522 | *((int *)once_control) = 1; |
---|
523 | } // if |
---|
524 | unlock(once_lock); |
---|
525 | return 0; |
---|
526 | } // pthread_once |
---|
527 | |
---|
528 | int pthread_key_create( pthread_key_t *key, void (*destructor)( void * ) ) libcfa_public __THROW { |
---|
529 | lock(key_lock); |
---|
530 | for ( int i = 0; i < PTHREAD_KEYS_MAX; i += 1 ) { |
---|
531 | if ( ! cfa_pthread_keys[i].in_use ) { |
---|
532 | cfa_pthread_keys[i].in_use = true; |
---|
533 | cfa_pthread_keys[i].destructor = destructor; |
---|
534 | unlock( key_lock ); |
---|
535 | *key = i; |
---|
536 | return 0; |
---|
537 | } // if |
---|
538 | } // for |
---|
539 | unlock(key_lock); |
---|
540 | return EAGAIN; |
---|
541 | } // pthread_key_create |
---|
542 | |
---|
543 | int pthread_key_delete( pthread_key_t key ) libcfa_public __THROW { |
---|
544 | lock(key_lock); |
---|
545 | if ( key >= PTHREAD_KEYS_MAX || ! cfa_pthread_keys[key].in_use ) { |
---|
546 | unlock( key_lock ); |
---|
547 | return EINVAL; |
---|
548 | } // if |
---|
549 | cfa_pthread_keys[key].in_use = false; |
---|
550 | cfa_pthread_keys[key].destructor = NULL; |
---|
551 | |
---|
552 | // Remove key from all threads with a value. |
---|
553 | pthread_values& p; |
---|
554 | Sequence(pthread_values)& head = cfa_pthread_keys[key].threads; |
---|
555 | for ( SeqIter(pthread_values) iter = { head }; iter | p; ) { |
---|
556 | remove(head, p); |
---|
557 | p.in_use = false; |
---|
558 | } |
---|
559 | unlock(key_lock); |
---|
560 | return 0; |
---|
561 | } // pthread_key_delete |
---|
562 | |
---|
563 | int pthread_setspecific( pthread_key_t key, const void *value ) libcfa_public __THROW { |
---|
564 | // get current thread |
---|
565 | cfaPthread* t = lookup(pthread_self()); |
---|
566 | // if current thread's pthreadData is NULL; initialize it |
---|
567 | pthread_values* values; |
---|
568 | if (t->pthreadData == NULL) { |
---|
569 | values = anew( PTHREAD_KEYS_MAX); |
---|
570 | t->pthreadData = values; |
---|
571 | for ( int i = 0;i < PTHREAD_KEYS_MAX; i++) { |
---|
572 | t->pthreadData[i].in_use = false; |
---|
573 | } // for |
---|
574 | } else { |
---|
575 | values = t->pthreadData; |
---|
576 | } // if |
---|
577 | // find corresponding key and set value |
---|
578 | lock(key_lock); |
---|
579 | // if invalid key |
---|
580 | if ( key >= PTHREAD_KEYS_MAX || ! cfa_pthread_keys[key].in_use ) { |
---|
581 | unlock( key_lock ); |
---|
582 | return EINVAL; |
---|
583 | } // if |
---|
584 | pthread_values &entry = values[key]; |
---|
585 | if ( ! entry.in_use ) { |
---|
586 | entry.in_use = true; |
---|
587 | add(cfa_pthread_keys[key].threads, entry); |
---|
588 | } // if |
---|
589 | entry.value = (void *)value; |
---|
590 | unlock(key_lock); |
---|
591 | return 0; |
---|
592 | } //pthread_setspecific |
---|
593 | |
---|
594 | void* pthread_getspecific(pthread_key_t key) libcfa_public __THROW { |
---|
595 | if (key >= PTHREAD_KEYS_MAX || ! cfa_pthread_keys[key].in_use) return NULL; |
---|
596 | |
---|
597 | // get current thread |
---|
598 | cfaPthread* t = lookup(pthread_self()); |
---|
599 | if (t->pthreadData == NULL) return NULL; |
---|
600 | lock(key_lock); |
---|
601 | pthread_values &entry = ((pthread_values *)t->pthreadData)[key]; |
---|
602 | if ( ! entry.in_use ) { |
---|
603 | unlock( key_lock ); |
---|
604 | return NULL; |
---|
605 | } // if |
---|
606 | void *value = entry.value; |
---|
607 | unlock(key_lock); |
---|
608 | |
---|
609 | return value; |
---|
610 | } //pthread_get_specific |
---|
611 | |
---|
612 | //######################### Parallelism ######################### |
---|
613 | void pthread_delete_kernel_threads_() __THROW { // see uMain::~uMain |
---|
614 | Pthread_kernel_threads& p; |
---|
615 | for ( StackIter(Pthread_kernel_threads) iter = {cfa_pthreads_kernel_threads}; iter | p; ) { |
---|
616 | delete(&p); |
---|
617 | } // for |
---|
618 | } // pthread_delete_kernel_threads_ |
---|
619 | |
---|
620 | int pthread_getconcurrency( void ) __THROW { // XOPEN extension |
---|
621 | return cfa_pthreads_kernel_threads_zero ? 0 : cfa_pthreads_no_kernel_threads; |
---|
622 | } // pthread_getconcurrency |
---|
623 | |
---|
624 | int pthread_setconcurrency( int new_level ) libcfa_public __THROW { // XOPEN extension |
---|
625 | if ( new_level < 0 ) return EINVAL; |
---|
626 | if ( new_level == 0 ) { |
---|
627 | cfa_pthreads_kernel_threads_zero = true; // remember set to zero, but ignore |
---|
628 | return 0; // do not do kernel thread management |
---|
629 | } // exit |
---|
630 | cfa_pthreads_kernel_threads_zero = false; |
---|
631 | lock( concurrency_lock ); |
---|
632 | for ( ; new_level > cfa_pthreads_no_kernel_threads; cfa_pthreads_no_kernel_threads += 1 ) { // add processors ? |
---|
633 | push(cfa_pthreads_kernel_threads, *new() ); |
---|
634 | } // for |
---|
635 | for ( ; new_level < cfa_pthreads_no_kernel_threads; cfa_pthreads_no_kernel_threads -= 1 ) { // remove processors ? |
---|
636 | delete(&pop(cfa_pthreads_kernel_threads)); |
---|
637 | } // for |
---|
638 | unlock( concurrency_lock ); |
---|
639 | return 0; |
---|
640 | } // pthread_setconcurrency |
---|
641 | |
---|
642 | //######################### Signal ######################### |
---|
643 | |
---|
644 | |
---|
645 | int pthread_sigmask( int /* how */, const sigset_t * /* set */, sigset_t * /* oset */ ) libcfa_public __THROW { |
---|
646 | abort( "pthread_sigmask : not implemented" ); |
---|
647 | return 0; |
---|
648 | } // pthread_sigmask |
---|
649 | |
---|
650 | int pthread_kill( pthread_t _thread __attribute__(( unused )), int sig ) libcfa_public __THROW { |
---|
651 | if ( sig == 0 ) { |
---|
652 | return 0; |
---|
653 | } else { |
---|
654 | abort( "pthread_kill : not implemented" ); |
---|
655 | } // if |
---|
656 | return 0; |
---|
657 | } // pthread_kill |
---|
658 | |
---|
659 | int pthread_sigqueue(pthread_t , int sig, const union sigval) libcfa_public __THROW { |
---|
660 | abort( "pthread_sigqueue : not implemented" ); |
---|
661 | return 0; |
---|
662 | } // pthread_sigqueue |
---|
663 | |
---|
664 | //######################### Scheduling ######################### |
---|
665 | int pthread_detach( pthread_t threadID ) __THROW { |
---|
666 | abort( "pthread_detach : not implemented" ); |
---|
667 | return 0; |
---|
668 | } // pthread_detach |
---|
669 | |
---|
670 | int pthread_setschedparam( pthread_t /* thread */, int /* policy */, const struct sched_param * /* param */ ) libcfa_public __THROW { |
---|
671 | abort( "pthread_setschedparam : not implemented" ); |
---|
672 | return 0; |
---|
673 | } // pthread_setschedparam |
---|
674 | |
---|
675 | int pthread_getschedparam( pthread_t /* thread */, int */* policy */, struct sched_param * /* param */ ) libcfa_public __THROW { |
---|
676 | abort( "pthread_getschedparam : not implemented" ); |
---|
677 | return 0; |
---|
678 | } // pthread_getschedparam |
---|
679 | |
---|
680 | //######################### Mutex Attr ######################### |
---|
681 | |
---|
682 | int pthread_mutexattr_init( pthread_mutexattr_t * /* attr */ ) libcfa_public __THROW { |
---|
683 | return 0; |
---|
684 | } // pthread_mutexattr_init |
---|
685 | |
---|
686 | int pthread_mutexattr_destroy( pthread_mutexattr_t * /* attr */ ) libcfa_public __THROW { |
---|
687 | return 0; |
---|
688 | } // pthread_mutexattr_destroy |
---|
689 | |
---|
690 | int pthread_mutexattr_setpshared( pthread_mutexattr_t * /* attr */, int /* pshared */ ) libcfa_public __THROW { |
---|
691 | return 0; |
---|
692 | } // pthread_mutexattr_setpshared |
---|
693 | |
---|
694 | int pthread_mutexattr_getpshared( const pthread_mutexattr_t * /* attr */, int * /* pshared */ ) libcfa_public __THROW { |
---|
695 | return 0; |
---|
696 | } // pthread_mutexattr_getpshared |
---|
697 | |
---|
698 | int pthread_mutexattr_setprotocol( pthread_mutexattr_t * /* attr */, int /* protocol */ ) libcfa_public __THROW { |
---|
699 | return 0; |
---|
700 | } // pthread_mutexattr_setprotocol |
---|
701 | |
---|
702 | int pthread_mutexattr_getprotocol( const pthread_mutexattr_t * /* attr */, int * /* protocol */ ) libcfa_public __THROW { |
---|
703 | return 0; |
---|
704 | } // pthread_mutexattr_getprotocol |
---|
705 | |
---|
706 | int pthread_mutexattr_setprioceiling( pthread_mutexattr_t * /* attr */, int /* prioceiling */ ) libcfa_public __THROW { |
---|
707 | return 0; |
---|
708 | } // pthread_mutexattr_setprioceiling |
---|
709 | |
---|
710 | int pthread_mutexattr_getprioceiling( const pthread_mutexattr_t * /* attr */, int * /* ceiling */ ) libcfa_public __THROW { |
---|
711 | return 0; |
---|
712 | } // pthread_mutexattr_getprioceiling |
---|
713 | |
---|
714 | int pthread_mutex_setprioceiling( pthread_mutex_t * /* mutex */, int /* prioceiling */, int * /* old_ceiling */ ) libcfa_public __THROW { |
---|
715 | return 0; |
---|
716 | } // pthread_mutex_setprioceiling |
---|
717 | |
---|
718 | int pthread_mutex_getprioceiling( const pthread_mutex_t * /* mutex */, int * /* ceiling */ ) libcfa_public __THROW { |
---|
719 | return 0; |
---|
720 | } // pthread_mutex_getprioceiling |
---|
721 | |
---|
722 | int pthread_mutexattr_gettype( __const pthread_mutexattr_t * __restrict /* __attr */, int * __restrict /* __kind */ ) libcfa_public __THROW { |
---|
723 | return 0; |
---|
724 | } // pthread_mutexattr_gettype |
---|
725 | |
---|
726 | int pthread_mutexattr_settype( pthread_mutexattr_t * /* __attr */, int /* __kind */ ) libcfa_public __THROW { |
---|
727 | return 0; |
---|
728 | } // pthread_mutexattr_settype |
---|
729 | |
---|
730 | //######################### Mutex ######################### |
---|
731 | |
---|
732 | int pthread_mutex_timedlock( pthread_mutex_t *__restrict /* __mutex */, __const struct timespec *__restrict /* __abstime */ ) libcfa_public __THROW { |
---|
733 | abort( "pthread_mutex_timedlock" ); |
---|
734 | } // pthread_mutex_timedlock |
---|
735 | |
---|
736 | //######################### Condition ######################### |
---|
737 | |
---|
738 | int pthread_condattr_getclock( __const pthread_condattr_t * __restrict /* __attr */, __clockid_t *__restrict /* __clock_id */ ) libcfa_public __THROW { |
---|
739 | abort( "pthread_condattr_getclock" ); |
---|
740 | } // pthread_condattr_getclock |
---|
741 | |
---|
742 | int pthread_condattr_setclock( pthread_condattr_t * /* __attr */, __clockid_t /* __clock_id */ ) libcfa_public __THROW { |
---|
743 | abort( "pthread_condattr_setclock" ); |
---|
744 | } // pthread_condattr_setclock |
---|
745 | |
---|
746 | //######################### Spinlock ######################### |
---|
747 | |
---|
748 | int pthread_spin_init( pthread_spinlock_t * /* __lock */, int /*__pshared */ ) libcfa_public __THROW { |
---|
749 | abort( "pthread_spin_init" ); |
---|
750 | } // pthread_spin_init |
---|
751 | |
---|
752 | int pthread_spin_destroy( pthread_spinlock_t * /* __lock */ ) libcfa_public __THROW { |
---|
753 | abort( "pthread_spin_destroy" ); |
---|
754 | } // pthread_spin_destroy |
---|
755 | |
---|
756 | int pthread_spin_lock( pthread_spinlock_t * /* __lock */ ) libcfa_public __THROW { |
---|
757 | abort( "pthread_spin_lock" ); |
---|
758 | } // pthread_spin_lock |
---|
759 | |
---|
760 | int pthread_spin_trylock( pthread_spinlock_t * /* __lock */ ) libcfa_public __THROW { |
---|
761 | abort( "pthread_spin_trylock" ); |
---|
762 | } // pthread_spin_trylock |
---|
763 | |
---|
764 | int pthread_spin_unlock( pthread_spinlock_t * /* __lock */ ) libcfa_public __THROW { |
---|
765 | abort( "pthread_spin_unlock" ); |
---|
766 | } // pthread_spin_unlock |
---|
767 | |
---|
768 | //######################### Barrier ######################### |
---|
769 | |
---|
770 | int pthread_barrier_init( pthread_barrier_t *__restrict /* __barrier */, __const pthread_barrierattr_t *__restrict /* __attr */, unsigned int /* __count */ ) libcfa_public __THROW { |
---|
771 | abort( "pthread_barrier_init" ); |
---|
772 | } // pthread_barrier_init |
---|
773 | |
---|
774 | int pthread_barrier_destroy( pthread_barrier_t * /* __barrier */ ) libcfa_public __THROW { |
---|
775 | abort( "pthread_barrier_destroy" ); |
---|
776 | } // pthread_barrier_destroy |
---|
777 | |
---|
778 | int pthread_barrier_wait( pthread_barrier_t * /* __barrier */ ) libcfa_public __THROW { |
---|
779 | abort( "pthread_barrier_wait" ); |
---|
780 | } // pthread_barrier_wait |
---|
781 | |
---|
782 | int pthread_barrierattr_init( pthread_barrierattr_t * /* __attr */ ) libcfa_public __THROW { |
---|
783 | abort( "pthread_barrierattr_init" ); |
---|
784 | } // pthread_barrierattr_init |
---|
785 | |
---|
786 | int pthread_barrierattr_destroy( pthread_barrierattr_t * /* __attr */ ) libcfa_public __THROW { |
---|
787 | abort( "pthread_barrierattr_destroy" ); |
---|
788 | } // pthread_barrierattr_destroy |
---|
789 | |
---|
790 | int pthread_barrierattr_getpshared( __const pthread_barrierattr_t * __restrict /* __attr */, int *__restrict /* __pshared */ ) libcfa_public __THROW { |
---|
791 | abort( "pthread_barrierattr_getpshared" ); |
---|
792 | } // pthread_barrierattr_getpshared |
---|
793 | |
---|
794 | int pthread_barrierattr_setpshared( pthread_barrierattr_t * /* __attr */, int /* __pshared */ ) libcfa_public __THROW { |
---|
795 | abort( "pthread_barrierattr_setpshared" ); |
---|
796 | } // pthread_barrierattr_setpshared |
---|
797 | |
---|
798 | //######################### Clock ######################### |
---|
799 | |
---|
800 | int pthread_getcpuclockid( pthread_t /* __thread_id */, __clockid_t * /* __clock_id */ ) libcfa_public __THROW { |
---|
801 | abort( "pthread_getcpuclockid" ); |
---|
802 | } // pthread_getcpuclockid |
---|
803 | |
---|
804 | // pthread_atfork() |
---|
805 | |
---|
806 | // UNIX98 |
---|
807 | |
---|
808 | //######################### Read/Write ######################### |
---|
809 | |
---|
810 | int pthread_rwlock_init( pthread_rwlock_t *__restrict /* __rwlock */, __const pthread_rwlockattr_t *__restrict /* __attr */ ) libcfa_public __THROW { |
---|
811 | abort( "pthread_rwlock_init" ); |
---|
812 | } // pthread_rwlock_init |
---|
813 | |
---|
814 | int pthread_rwlock_destroy( pthread_rwlock_t * /* __rwlock */ ) libcfa_public __THROW { |
---|
815 | abort( "pthread_rwlock_destroy" ); |
---|
816 | } // pthread_rwlock_destroy |
---|
817 | |
---|
818 | int pthread_rwlock_rdlock( pthread_rwlock_t * /* __rwlock */ ) libcfa_public __THROW { |
---|
819 | abort( "pthread_rwlock_rdlock" ); |
---|
820 | } // pthread_rwlock_rdlock |
---|
821 | |
---|
822 | int pthread_rwlock_tryrdlock( pthread_rwlock_t * /* __rwlock */ ) libcfa_public __THROW { |
---|
823 | abort( "pthread_rwlock_tryrdlock" ); |
---|
824 | } // pthread_rwlock_tryrdlock |
---|
825 | |
---|
826 | int pthread_rwlock_wrlock( pthread_rwlock_t * /* __rwlock */ ) libcfa_public __THROW { |
---|
827 | abort( "pthread_rwlock_wrlock" ); |
---|
828 | } // pthread_rwlock_wrlock |
---|
829 | |
---|
830 | int pthread_rwlock_trywrlock( pthread_rwlock_t * /* __rwlock */ ) libcfa_public __THROW { |
---|
831 | abort( "pthread_rwlock_trywrlock" ); |
---|
832 | } // pthread_rwlock_trywrlock |
---|
833 | |
---|
834 | int pthread_rwlock_unlock( pthread_rwlock_t * /* __rwlock */ ) libcfa_public __THROW { |
---|
835 | abort( "pthread_rwlock_unlock" ); |
---|
836 | } // pthread_rwlock_unlock |
---|
837 | |
---|
838 | int pthread_rwlockattr_init( pthread_rwlockattr_t * /* __attr */ ) libcfa_public __THROW { |
---|
839 | abort( "pthread_rwlockattr_init" ); |
---|
840 | } // pthread_rwlockattr_init |
---|
841 | |
---|
842 | int pthread_rwlockattr_destroy( pthread_rwlockattr_t * /*__attr */ ) libcfa_public __THROW { |
---|
843 | abort( "pthread_rwlockattr_destroy" ); |
---|
844 | } // pthread_rwlockattr_destroy |
---|
845 | |
---|
846 | int pthread_rwlockattr_getpshared( __const pthread_rwlockattr_t * __restrict /* __attr */, int *__restrict /* __pshared */ ) libcfa_public __THROW { |
---|
847 | abort( "pthread_rwlockattr_getpshared" ); |
---|
848 | } // pthread_rwlockattr_getpshared |
---|
849 | |
---|
850 | int pthread_rwlockattr_setpshared( pthread_rwlockattr_t * /* __attr */, int /* __pshared */ ) libcfa_public __THROW { |
---|
851 | abort( "pthread_rwlockattr_setpshared" ); |
---|
852 | } // pthread_rwlockattr_setpshared |
---|
853 | |
---|
854 | int pthread_rwlockattr_getkind_np( __const pthread_rwlockattr_t * /* __attr */, int * /* __pref */ ) libcfa_public __THROW { |
---|
855 | abort( "pthread_rwlockattr_getkind_np" ); |
---|
856 | } // pthread_rwlockattr_getkind_np |
---|
857 | |
---|
858 | int pthread_rwlockattr_setkind_np( pthread_rwlockattr_t * /* __attr */, int /* __pref */ ) libcfa_public __THROW { |
---|
859 | abort( "pthread_rwlockattr_setkind_np" ); |
---|
860 | } // pthread_rwlockattr_setkind_np |
---|
861 | |
---|
862 | // UNIX98 + XOPEN |
---|
863 | |
---|
864 | int pthread_rwlock_timedrdlock( pthread_rwlock_t *__restrict /* __rwlock */, __const struct timespec *__restrict /* __abstime */ ) libcfa_public __THROW { |
---|
865 | abort( "pthread_rwlock_timedrdlock" ); |
---|
866 | } // pthread_rwlock_timedrdlock |
---|
867 | |
---|
868 | int pthread_rwlock_timedwrlock( pthread_rwlock_t *__restrict /* __rwlock */, __const struct timespec *__restrict /* __abstime */ ) libcfa_public __THROW { |
---|
869 | abort( "pthread_rwlock_timedwrlock" ); |
---|
870 | } // pthread_rwlock_timedwrlock |
---|
871 | |
---|
872 | // GNU |
---|
873 | |
---|
874 | //######################### Parallelism ######################### |
---|
875 | |
---|
876 | // int pthread_setaffinity_np( pthread_t /* __th */, size_t /* __cpusetsize */, __const cpu_set_t * /* __cpuset */ ) libcfa_public __THROW { |
---|
877 | // abort( "pthread_setaffinity_np" ); |
---|
878 | // } // pthread_setaffinity_np |
---|
879 | |
---|
880 | // int pthread_getaffinity_np( pthread_t /* __th */, size_t /* __cpusetsize */, cpu_set_t * /* __cpuset */ ) libcfa_public __THROW { |
---|
881 | // abort( "pthread_getaffinity_np" ); |
---|
882 | // } // pthread_getaffinity_np |
---|
883 | |
---|
884 | // int pthread_attr_setaffinity_np( pthread_attr_t * /* __attr */, size_t /* __cpusetsize */, __const cpu_set_t * /* __cpuset */ ) libcfa_public __THROW { |
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885 | // abort( "pthread_attr_setaffinity_np" ); |
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886 | // } // pthread_attr_setaffinity_np |
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887 | |
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888 | // int pthread_attr_getaffinity_np( __const pthread_attr_t * /* __attr */, size_t /* __cpusetsize */, cpu_set_t * /* __cpuset */ ) libcfa_public __THROW { |
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889 | // abort( "pthread_attr_getaffinity_np" ); |
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890 | // } // pthread_attr_getaffinity_np |
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891 | |
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892 | //######################### Cancellation ######################### |
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893 | |
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894 | void _pthread_cleanup_push_defer( struct _pthread_cleanup_buffer * /* __buffer */, void( * /* __routine */ )( void * ), void * /* __arg */ ) libcfa_public __THROW { |
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895 | abort( "_pthread_cleanup_push_defer" ); |
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896 | } // _pthread_cleanup_push_defer |
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897 | |
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898 | void _pthread_cleanup_pop_restore( struct _pthread_cleanup_buffer * /* __buffer */, int /* __execute */ ) libcfa_public __THROW { |
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899 | abort( "_pthread_cleanup_pop_restore" ); |
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900 | } // _pthread_cleanup_pop_res |
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901 | |
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902 | int pthread_cancel( pthread_t threadID ) libcfa_public __THROW { |
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903 | abort("pthread cancel not implemented"); |
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904 | return 0; |
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905 | } // pthread_cancel |
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906 | |
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907 | int pthread_setcancelstate( int state, int *oldstate ) libcfa_public __THROW { |
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908 | abort("pthread_setcancelstate not implemented"); |
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909 | return 0; |
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910 | } // pthread_setcancelstate |
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911 | |
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912 | int pthread_setcanceltype( int type, int *oldtype ) libcfa_public __THROW { |
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913 | abort("pthread_setcanceltype not implemented"); |
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914 | return 0; |
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915 | } // pthread_setcanceltype |
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916 | } // extern "C" |
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917 | |
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918 | #pragma GCC diagnostic pop |
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919 | |
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