source: src/libcfa/concurrency/invoke.h@ 85b1deb

ADT aaron-thesis arm-eh ast-experimental cleanup-dtors deferred_resn demangler enum forall-pointer-decay jacob/cs343-translation jenkins-sandbox new-ast new-ast-unique-expr new-env no_list persistent-indexer pthread-emulation qualifiedEnum with_gc
Last change on this file since 85b1deb was 597c34a3, checked in by Alan Kennedy <afakenne@…>, 7 years ago

ARM preemption
  • Property mode set to 100644
File size: 7.1 KB
Line 
1//
2// Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo
3//
4// The contents of this file are covered under the licence agreement in the
5// file "LICENCE" distributed with Cforall.
6//
7// invoke.h --
8//
9// Author : Thierry Delisle
10// Created On : Tue Jan 17 12:27:26 2016
11// Last Modified By : Peter A. Buhr
12// Last Modified On : Sat May 19 08:23:21 2018
13// Update Count : 31
14//
15
16#include "bits/containers.h"
17#include "bits/defs.h"
18#include "bits/locks.h"
19
20#ifdef __cforall
21extern "C" {
22#endif
23
24#if ! defined(__CFA_INVOKE_PRIVATE__)
25#ifndef _INVOKE_H_
26#define _INVOKE_H_
27
28#ifdef __ARM_ARCH
29 // function prototypes are only really used by these macros on ARM
30 void disable_global_interrupts();
31 void enable_global_interrupts();
32
33 #define TL_GET( member ) ( { __typeof__( kernelTLS.member ) target; \
34 disable_global_interrupts(); \
35 target = kernelTLS.member; \
36 enable_global_interrupts(); \
37 target; } )
38 #define TL_SET( member, value ) disable_global_interrupts(); \
39 kernelTLS.member = value; \
40 enable_global_interrupts();
41#else
42 #define TL_GET( member ) kernelTLS.member
43 #define TL_SET( member, value ) kernelTLS.member = value;
44#endif
45
46 #ifdef __cforall
47 extern "Cforall" {
48 static inline struct thread_desc * & get_next( struct thread_desc & this );
49 static inline struct __condition_criterion_t * & get_next( struct __condition_criterion_t & this );
50
51 extern thread_local struct KernelThreadData {
52 struct coroutine_desc * volatile this_coroutine;
53 struct thread_desc * volatile this_thread;
54 struct processor * volatile this_processor;
55
56 struct {
57 volatile unsigned short disable_count;
58 volatile bool enabled;
59 volatile bool in_progress;
60 } preemption_state;
61 } kernelTLS;
62 }
63
64 static inline struct coroutine_desc * volatile active_coroutine() { return TL_GET( this_coroutine ); }
65 static inline struct thread_desc * volatile active_thread () { return TL_GET( this_thread ); }
66 static inline struct processor * volatile active_processor() { return TL_GET( this_processor ); } // UNSAFE
67 #endif
68
69 struct coStack_t {
70 size_t size; // size of stack
71 void * storage; // pointer to stack
72 void * limit; // stack grows towards stack limit
73 void * base; // base of stack
74 void * context; // address of cfa_context_t
75 void * top; // address of top of storage
76 bool userStack; // whether or not the user allocated the stack
77 };
78
79 enum coroutine_state { Halted, Start, Inactive, Active, Primed };
80
81 struct coroutine_desc {
82 struct coStack_t stack; // stack information of the coroutine
83 const char * name; // textual name for coroutine/task, initialized by uC++ generated code
84 int errno_; // copy of global UNIX variable errno
85 enum coroutine_state state; // current execution status for coroutine
86 struct coroutine_desc * starter; // first coroutine to resume this one
87 struct coroutine_desc * last; // last coroutine to resume this one
88 };
89
90 struct __waitfor_mask_t {
91 // the index of the accepted function, -1 if none
92 short * accepted;
93
94 // list of acceptable functions, null if any
95 __small_array_t(struct __acceptable_t) __cfa_anonymous_object;
96 };
97
98 struct monitor_desc {
99 // spinlock to protect internal data
100 struct __spinlock_t lock;
101
102 // current owner of the monitor
103 struct thread_desc * owner;
104
105 // queue of threads that are blocked waiting for the monitor
106 __queue_t(struct thread_desc) entry_queue;
107
108 // stack of conditions to run next once we exit the monitor
109 __stack_t(struct __condition_criterion_t) signal_stack;
110
111 // monitor routines can be called recursively, we need to keep track of that
112 unsigned int recursion;
113
114 // mask used to know if some thread is waiting for something while holding the monitor
115 struct __waitfor_mask_t mask;
116
117 // node used to signal the dtor in a waitfor dtor
118 struct __condition_node_t * dtor_node;
119 };
120
121 struct __monitor_group_t {
122 // currently held monitors
123 __small_array_t(monitor_desc*) __cfa_anonymous_object;
124
125 // last function that acquired monitors
126 fptr_t func;
127 };
128
129 struct thread_desc {
130 // Core threading fields
131 // coroutine body used to store context
132 struct coroutine_desc self_cor;
133
134 // current active context
135 struct coroutine_desc * curr_cor;
136
137 // monitor body used for mutual exclusion
138 struct monitor_desc self_mon;
139
140 // pointer to monitor with sufficient lifetime for current monitors
141 struct monitor_desc * self_mon_p;
142
143 // pointer to the cluster on which the thread is running
144 struct cluster * curr_cluster;
145
146 // monitors currently held by this thread
147 struct __monitor_group_t monitors;
148
149 // Link lists fields
150 // instrusive link field for threads
151 struct thread_desc * next;
152
153 struct {
154 struct thread_desc * next;
155 struct thread_desc * prev;
156 } node;
157 };
158
159 #ifdef __cforall
160 extern "Cforall" {
161 static inline thread_desc * & get_next( thread_desc & this ) {
162 return this.next;
163 }
164
165 static inline [thread_desc *&, thread_desc *& ] __get( thread_desc & this ) {
166 return this.node.[next, prev];
167 }
168
169 static inline struct __condition_criterion_t * & get_next( struct __condition_criterion_t & this );
170
171 static inline void ?{}(__monitor_group_t & this) {
172 (this.data){NULL};
173 (this.size){0};
174 (this.func){NULL};
175 }
176
177 static inline void ?{}(__monitor_group_t & this, struct monitor_desc ** data, __lock_size_t size, fptr_t func) {
178 (this.data){data};
179 (this.size){size};
180 (this.func){func};
181 }
182
183 static inline bool ?==?( const __monitor_group_t & lhs, const __monitor_group_t & rhs ) {
184 if( (lhs.data != 0) != (rhs.data != 0) ) return false;
185 if( lhs.size != rhs.size ) return false;
186 if( lhs.func != rhs.func ) return false;
187
188 // Check that all the monitors match
189 for( int i = 0; i < lhs.size; i++ ) {
190 // If not a match, check next function
191 if( lhs[i] != rhs[i] ) return false;
192 }
193
194 return true;
195 }
196
197 static inline void ?=?(__monitor_group_t & lhs, const __monitor_group_t & rhs) {
198 lhs.data = rhs.data;
199 lhs.size = rhs.size;
200 lhs.func = rhs.func;
201 }
202 }
203 #endif
204
205#endif //_INVOKE_H_
206#else //! defined(__CFA_INVOKE_PRIVATE__)
207#ifndef _INVOKE_PRIVATE_H_
208#define _INVOKE_PRIVATE_H_
209
210 struct machine_context_t {
211 void *SP;
212 void *FP;
213 void *PC;
214 };
215
216 // assembler routines that performs the context switch
217 extern void CtxInvokeStub( void );
218 void CtxSwitch( void * from, void * to ) asm ("CtxSwitch");
219
220 #if defined( __i386 )
221 #define CtxGet( ctx ) __asm__ ( \
222 "movl %%esp,%0\n" \
223 "movl %%ebp,%1\n" \
224 : "=rm" (ctx.SP), "=rm" (ctx.FP) )
225 #elif defined( __x86_64 )
226 #define CtxGet( ctx ) __asm__ ( \
227 "movq %%rsp,%0\n" \
228 "movq %%rbp,%1\n" \
229 : "=rm" (ctx.SP), "=rm" (ctx.FP) )
230 #elif defined( __ARM_ARCH )
231 #define CtxGet( ctx ) __asm__ ( \
232 "mov %0,%%sp\n" \
233 "mov %1,%%r11\n" \
234 : "=rm" (ctx.SP), "=rm" (ctx.FP) )
235 #else
236 #error unknown hardware architecture
237 #endif
238
239#endif //_INVOKE_PRIVATE_H_
240#endif //! defined(__CFA_INVOKE_PRIVATE__)
241#ifdef __cforall
242}
243#endif
244
245// Local Variables: //
246// mode: c //
247// tab-width: 4 //
248// End: //
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