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"
11 #include "simix/private.h"
13 #ifdef HAVE_VALGRIND_VALGRIND_H
14 # include <valgrind/valgrind.h>
15 #endif /* HAVE_VALGRIND_VALGRIND_H */
18 #include "win32_ucontext.h"
19 #include "win32_ucontext.c"
24 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simix_context);
26 static xbt_tpool_t tpool;
29 smx_ctx_sysv_create_context(xbt_main_func_t code, int argc, char **argv,
30 void_pfn_smxprocess_t cleanup_func, void* data);
33 static void smx_ctx_sysv_wrapper(smx_ctx_sysv_t context);
35 void SIMIX_ctx_sysv_factory_init(smx_context_factory_t *factory)
37 smx_ctx_base_factory_init(factory);
39 (*factory)->finalize = smx_ctx_sysv_factory_finalize;
40 (*factory)->create_context = smx_ctx_sysv_create_context;
41 /* Do not overload that method (*factory)->finalize */
42 (*factory)->free = smx_ctx_sysv_free;
43 (*factory)->stop = smx_ctx_sysv_stop;
44 (*factory)->suspend = smx_ctx_sysv_suspend;
45 (*factory)->name = "smx_sysv_context_factory";
47 if(_surf_parallel_contexts){
48 tpool = xbt_tpool_new(2, 10);
49 (*factory)->runall = smx_ctx_sysv_runall_parallel;
51 (*factory)->runall = smx_ctx_sysv_runall;
55 int smx_ctx_sysv_factory_finalize(smx_context_factory_t *factory)
58 xbt_tpool_destroy(tpool);
59 return smx_ctx_base_factory_finalize(factory);
63 smx_ctx_sysv_create_context_sized(size_t size, xbt_main_func_t code,
64 int argc, char **argv,
65 void_pfn_smxprocess_t cleanup_func,
69 smx_ctx_sysv_t context =
70 (smx_ctx_sysv_t) smx_ctx_base_factory_create_context_sized(size,
77 /* If the user provided a function for the process then use it
78 otherwise is the context for maestro */
81 xbt_assert2(getcontext(&(context->uc)) == 0,
82 "Error in context saving: %d (%s)", errno,
85 context->uc.uc_link = NULL;
87 context->uc.uc_stack.ss_sp =
88 pth_skaddr_makecontext(context->stack, CONTEXT_STACK_SIZE);
90 context->uc.uc_stack.ss_size =
91 pth_sksize_makecontext(context->stack, CONTEXT_STACK_SIZE);
93 #ifdef HAVE_VALGRIND_VALGRIND_H
94 context->valgrind_stack_id =
95 VALGRIND_STACK_REGISTER(context->uc.uc_stack.ss_sp,
96 ((char *) context->uc.uc_stack.ss_sp) +
97 context->uc.uc_stack.ss_size);
98 #endif /* HAVE_VALGRIND_VALGRIND_H */
100 makecontext(&((smx_ctx_sysv_t) context)->uc, (void (*)())smx_ctx_sysv_wrapper,
101 sizeof(void*)/sizeof(int), context);
104 return (smx_context_t) context;
109 smx_ctx_sysv_create_context(xbt_main_func_t code, int argc, char **argv,
110 void_pfn_smxprocess_t cleanup_func,
114 return smx_ctx_sysv_create_context_sized(sizeof(s_smx_ctx_sysv_t),
115 code, argc, argv, cleanup_func,
120 void smx_ctx_sysv_free(smx_context_t context)
125 #ifdef HAVE_VALGRIND_VALGRIND_H
126 VALGRIND_STACK_DEREGISTER(((smx_ctx_sysv_t)
127 context)->valgrind_stack_id);
128 #endif /* HAVE_VALGRIND_VALGRIND_H */
131 smx_ctx_base_free(context);
134 void smx_ctx_sysv_stop(smx_context_t context)
136 smx_ctx_base_stop(context);
138 smx_ctx_sysv_suspend(context);
141 void smx_ctx_sysv_wrapper(smx_ctx_sysv_t context)
143 (context->super.code) (context->super.argc, context->super.argv);
145 smx_ctx_sysv_stop((smx_context_t) context);
148 void smx_ctx_sysv_suspend(smx_context_t context)
150 ucontext_t maestro_ctx =
151 ((smx_ctx_sysv_t) simix_global->maestro_process->context)->uc;
153 int rv = swapcontext(&((smx_ctx_sysv_t) context)->uc, &maestro_ctx);
155 xbt_assert0((rv == 0), "Context swapping failure");
158 void smx_ctx_sysv_resume(smx_context_t new_context)
160 smx_ctx_sysv_t maestro =
161 (smx_ctx_sysv_t) simix_global->maestro_process->context;
164 swapcontext(&(maestro->uc), &((smx_ctx_sysv_t) new_context)->uc);
166 xbt_assert0((rv == 0), "Context swapping failure");
169 void smx_ctx_sysv_runall(xbt_swag_t processes)
171 smx_context_t old_context;
172 smx_process_t process;
174 while ((process = xbt_swag_extract(processes))) {
175 old_context = smx_current_context;
176 smx_current_context = process->context;
177 smx_ctx_sysv_resume(smx_current_context);
178 smx_current_context = old_context;
182 void smx_ctx_sysv_runall_parallel(xbt_swag_t processes)
184 smx_process_t process;
185 while((process = xbt_swag_extract(processes))){
186 xbt_tpool_queue_job(tpool, (void_f_pvoid_t)smx_ctx_sysv_resume, process->context);