1 /* context_sysv - context switching with ucontextes from System V */
3 /* Copyright (c) 2009, 2010. The SimGrid Team.
4 * All rights reserved. */
6 /* This program is free software; you can redistribute it and/or modify it
7 * under the terms of the license (GNU LGPL) which comes with this package. */
9 #include "smx_context_sysv_private.h"
10 #include "xbt/threadpool.h"
12 #ifdef HAVE_VALGRIND_VALGRIND_H
13 # include <valgrind/valgrind.h>
14 #endif /* HAVE_VALGRIND_VALGRIND_H */
17 #include "win32_ucontext.h"
18 #include "win32_ucontext.c"
23 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simix_context);
25 static xbt_tpool_t tpool;
28 smx_ctx_sysv_create_context(xbt_main_func_t code, int argc, char **argv,
29 void_pfn_smxprocess_t cleanup_func, void* data);
32 static void smx_ctx_sysv_wrapper(smx_ctx_sysv_t context);
34 void SIMIX_ctx_sysv_factory_init(smx_context_factory_t *factory)
36 smx_ctx_base_factory_init(factory);
38 (*factory)->finalize = smx_ctx_sysv_factory_finalize;
39 (*factory)->create_context = smx_ctx_sysv_create_context;
40 /* Do not overload that method (*factory)->finalize */
41 (*factory)->free = smx_ctx_sysv_free;
42 (*factory)->stop = smx_ctx_sysv_stop;
43 (*factory)->suspend = smx_ctx_sysv_suspend;
44 (*factory)->name = "smx_sysv_context_factory";
46 if(_surf_parallel_contexts){
47 tpool = xbt_tpool_new(2, 10);
48 (*factory)->runall = smx_ctx_sysv_runall_parallel;
50 (*factory)->runall = smx_ctx_sysv_runall;
54 int smx_ctx_sysv_factory_finalize(smx_context_factory_t *factory)
57 xbt_tpool_destroy(tpool);
58 return smx_ctx_base_factory_finalize(factory);
62 smx_ctx_sysv_create_context_sized(size_t size, xbt_main_func_t code,
63 int argc, char **argv,
64 void_pfn_smxprocess_t cleanup_func,
68 smx_ctx_sysv_t context =
69 (smx_ctx_sysv_t) smx_ctx_base_factory_create_context_sized(size,
76 /* If the user provided a function for the process then use it
77 otherwise is the context for maestro */
80 xbt_assert2(getcontext(&(context->uc)) == 0,
81 "Error in context saving: %d (%s)", errno,
84 context->uc.uc_link = NULL;
86 context->uc.uc_stack.ss_sp =
87 pth_skaddr_makecontext(context->stack, CONTEXT_STACK_SIZE);
89 context->uc.uc_stack.ss_size =
90 pth_sksize_makecontext(context->stack, CONTEXT_STACK_SIZE);
92 #ifdef HAVE_VALGRIND_VALGRIND_H
93 context->valgrind_stack_id =
94 VALGRIND_STACK_REGISTER(context->uc.uc_stack.ss_sp,
95 ((char *) context->uc.uc_stack.ss_sp) +
96 context->uc.uc_stack.ss_size);
97 #endif /* HAVE_VALGRIND_VALGRIND_H */
99 makecontext(&((smx_ctx_sysv_t) context)->uc, (void (*)())smx_ctx_sysv_wrapper,
100 sizeof(void*)/sizeof(int), context);
103 return (smx_context_t) context;
108 smx_ctx_sysv_create_context(xbt_main_func_t code, int argc, char **argv,
109 void_pfn_smxprocess_t cleanup_func,
113 return smx_ctx_sysv_create_context_sized(sizeof(s_smx_ctx_sysv_t),
114 code, argc, argv, cleanup_func,
119 void smx_ctx_sysv_free(smx_context_t context)
124 #ifdef HAVE_VALGRIND_VALGRIND_H
125 VALGRIND_STACK_DEREGISTER(((smx_ctx_sysv_t)
126 context)->valgrind_stack_id);
127 #endif /* HAVE_VALGRIND_VALGRIND_H */
130 smx_ctx_base_free(context);
133 void smx_ctx_sysv_stop(smx_context_t context)
135 smx_ctx_base_stop(context);
137 smx_ctx_sysv_suspend(context);
140 void smx_ctx_sysv_wrapper(smx_ctx_sysv_t context)
142 (context->super.code) (context->super.argc, context->super.argv);
144 smx_ctx_sysv_stop((smx_context_t) context);
147 void smx_ctx_sysv_suspend(smx_context_t context)
149 ucontext_t maestro_ctx =
150 ((smx_ctx_sysv_t) simix_global->maestro_process->context)->uc;
152 int rv = swapcontext(&((smx_ctx_sysv_t) context)->uc, &maestro_ctx);
154 xbt_assert0((rv == 0), "Context swapping failure");
157 void smx_ctx_sysv_resume(smx_context_t new_context)
159 smx_ctx_sysv_t maestro =
160 (smx_ctx_sysv_t) simix_global->maestro_process->context;
163 swapcontext(&(maestro->uc), &((smx_ctx_sysv_t) new_context)->uc);
165 xbt_assert0((rv == 0), "Context swapping failure");
168 void smx_ctx_sysv_runall(xbt_swag_t processes)
170 smx_context_t old_context;
171 smx_process_t process;
173 while ((process = xbt_swag_extract(processes))) {
174 old_context = smx_current_context;
175 smx_current_context = process->context;
176 smx_ctx_sysv_resume(smx_current_context);
177 smx_current_context = old_context;
181 void smx_ctx_sysv_runall_parallel(xbt_swag_t processes)
183 smx_process_t process;
184 while((process = xbt_swag_extract(processes))){
185 xbt_tpool_queue_job(tpool, (void_f_pvoid_t)smx_ctx_sysv_resume, process->context);