1 | // |
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2 | // Cforall Version 1.0.0 Copyright (C) 2016 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 | // kernel -- |
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8 | // |
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9 | // Author : Thierry Delisle |
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10 | // Created On : Tue Jan 17 12:27:26 2017 |
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11 | // Last Modified By : Peter A. Buhr |
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12 | // Last Modified On : Sat Jul 22 09:58:39 2017 |
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13 | // Update Count : 2 |
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14 | // |
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15 | |
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16 | #pragma once |
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17 | |
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18 | #include <stdbool.h> |
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19 | |
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20 | #include "invoke.h" |
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21 | #include "bits/cfatime.h" |
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22 | |
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23 | extern "C" { |
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24 | #include <pthread.h> |
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25 | } |
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26 | |
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27 | //----------------------------------------------------------------------------- |
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28 | // Locks |
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29 | struct semaphore { |
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30 | __spinlock_t lock; |
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31 | int count; |
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32 | __queue_t(thread_desc) waiting; |
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33 | }; |
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34 | |
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35 | void ?{}(semaphore & this, int count = 1); |
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36 | void ^?{}(semaphore & this); |
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37 | void P (semaphore & this); |
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38 | void V (semaphore & this); |
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39 | |
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40 | |
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41 | //----------------------------------------------------------------------------- |
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42 | // Cluster |
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43 | struct cluster { |
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44 | // Ready queue locks |
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45 | __spinlock_t ready_queue_lock; |
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46 | |
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47 | // Ready queue for threads |
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48 | __queue_t(thread_desc) ready_queue; |
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49 | |
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50 | // Preemption rate on this cluster |
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51 | __cfa_time_t preemption_rate; |
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52 | }; |
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53 | |
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54 | extern __cfa_time_t default_preemption(); |
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55 | |
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56 | void ?{} (cluster & this); |
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57 | void ^?{}(cluster & this); |
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58 | |
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59 | //----------------------------------------------------------------------------- |
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60 | // Processor |
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61 | enum FinishOpCode { No_Action, Release, Schedule, Release_Schedule, Release_Multi, Release_Multi_Schedule }; |
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62 | |
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63 | //TODO use union, many of these fields are mutually exclusive (i.e. MULTI vs NOMULTI) |
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64 | struct FinishAction { |
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65 | FinishOpCode action_code; |
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66 | thread_desc * thrd; |
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67 | __spinlock_t * lock; |
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68 | __spinlock_t ** locks; |
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69 | unsigned short lock_count; |
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70 | thread_desc ** thrds; |
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71 | unsigned short thrd_count; |
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72 | }; |
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73 | static inline void ?{}(FinishAction & this) { |
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74 | this.action_code = No_Action; |
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75 | this.thrd = NULL; |
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76 | this.lock = NULL; |
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77 | } |
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78 | static inline void ^?{}(FinishAction & this) {} |
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79 | |
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80 | // Processor |
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81 | // Wrapper around kernel threads |
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82 | struct processor { |
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83 | // Main state |
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84 | // Coroutine ctx who does keeps the state of the processor |
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85 | struct processorCtx_t * runner; |
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86 | |
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87 | // Cluster from which to get threads |
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88 | cluster * cltr; |
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89 | |
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90 | // Handle to pthreads |
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91 | pthread_t kernel_thread; |
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92 | |
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93 | // Termination |
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94 | // Set to true to notify the processor should terminate |
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95 | volatile bool do_terminate; |
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96 | |
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97 | // Termination synchronisation |
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98 | semaphore terminated; |
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99 | |
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100 | // RunThread data |
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101 | // Action to do after a thread is ran |
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102 | struct FinishAction finish; |
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103 | |
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104 | // Preemption data |
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105 | // Node which is added in the discrete event simulaiton |
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106 | struct alarm_node_t * preemption_alarm; |
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107 | |
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108 | // If true, a preemption was triggered in an unsafe region, the processor must preempt as soon as possible |
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109 | bool pending_preemption; |
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110 | |
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111 | #ifdef __CFA_DEBUG__ |
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112 | // Last function to enable preemption on this processor |
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113 | const char * last_enable; |
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114 | #endif |
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115 | }; |
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116 | |
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117 | void ?{}(processor & this); |
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118 | void ?{}(processor & this, cluster * cltr); |
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119 | void ^?{}(processor & this); |
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120 | |
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121 | // Local Variables: // |
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122 | // mode: c // |
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123 | // tab-width: 4 // |
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124 | // End: // |
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