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 #ifdef CONTEXT_THREADS /* To use parallel ucontexts a thread pool is needed */
49 tpool = xbt_tpool_new(2, 10);
50 (*factory)->runall = smx_ctx_sysv_runall_parallel;
51 (*factory)->self = smx_ctx_sysv_self_parallel;
53 THROW0(arg_error, 0, "No thread support for parallel context execution");
56 (*factory)->runall = smx_ctx_sysv_runall;
60 int smx_ctx_sysv_factory_finalize(smx_context_factory_t *factory)
63 xbt_tpool_destroy(tpool);
64 return smx_ctx_base_factory_finalize(factory);
68 smx_ctx_sysv_create_context_sized(size_t size, xbt_main_func_t code,
69 int argc, char **argv,
70 void_pfn_smxprocess_t cleanup_func,
74 smx_ctx_sysv_t context =
75 (smx_ctx_sysv_t) smx_ctx_base_factory_create_context_sized(size,
82 /* If the user provided a function for the process then use it
83 otherwise is the context for maestro */
86 xbt_assert2(getcontext(&(context->uc)) == 0,
87 "Error in context saving: %d (%s)", errno,
90 context->uc.uc_link = NULL;
92 context->uc.uc_stack.ss_sp =
93 pth_skaddr_makecontext(context->stack, CONTEXT_STACK_SIZE);
95 context->uc.uc_stack.ss_size =
96 pth_sksize_makecontext(context->stack, CONTEXT_STACK_SIZE);
98 #ifdef HAVE_VALGRIND_VALGRIND_H
99 context->valgrind_stack_id =
100 VALGRIND_STACK_REGISTER(context->uc.uc_stack.ss_sp,
101 ((char *) context->uc.uc_stack.ss_sp) +
102 context->uc.uc_stack.ss_size);
103 #endif /* HAVE_VALGRIND_VALGRIND_H */
105 makecontext(&((smx_ctx_sysv_t) context)->uc, (void (*)())smx_ctx_sysv_wrapper,
106 sizeof(void*)/sizeof(int), context);
108 maestro_context = context;
111 return (smx_context_t) context;
116 smx_ctx_sysv_create_context(xbt_main_func_t code, int argc, char **argv,
117 void_pfn_smxprocess_t cleanup_func,
121 return smx_ctx_sysv_create_context_sized(sizeof(s_smx_ctx_sysv_t),
122 code, argc, argv, cleanup_func,
127 void smx_ctx_sysv_free(smx_context_t context)
132 #ifdef HAVE_VALGRIND_VALGRIND_H
133 VALGRIND_STACK_DEREGISTER(((smx_ctx_sysv_t)
134 context)->valgrind_stack_id);
135 #endif /* HAVE_VALGRIND_VALGRIND_H */
138 smx_ctx_base_free(context);
141 void smx_ctx_sysv_stop(smx_context_t context)
143 smx_ctx_base_stop(context);
144 smx_ctx_sysv_suspend(context);
147 void smx_ctx_sysv_wrapper(smx_ctx_sysv_t context)
149 (context->super.code) (context->super.argc, context->super.argv);
151 smx_ctx_sysv_stop((smx_context_t) context);
154 void smx_ctx_sysv_suspend(smx_context_t context)
156 smx_current_context = (smx_context_t)maestro_context;
157 int rv = swapcontext(&((smx_ctx_sysv_t) context)->uc, &maestro_context->uc);
159 xbt_assert0((rv == 0), "Context swapping failure");
162 void smx_ctx_sysv_resume(smx_context_t context)
164 smx_current_context = context;
165 int rv = swapcontext(&maestro_context->uc, &((smx_ctx_sysv_t) context)->uc);
167 xbt_assert0((rv == 0), "Context swapping failure");
170 void smx_ctx_sysv_runall(xbt_swag_t processes)
172 smx_process_t process;
174 while ((process = xbt_swag_extract(processes)))
175 smx_ctx_sysv_resume(process->context);
178 void smx_ctx_sysv_resume_parallel(smx_context_t context)
180 xbt_os_thread_set_extra_data(context);
181 int rv = swapcontext(&maestro_context->uc, &((smx_ctx_sysv_t) context)->uc);
183 xbt_assert0((rv == 0), "Context swapping failure");
186 void smx_ctx_sysv_runall_parallel(xbt_swag_t processes)
188 smx_process_t process;
189 while((process = xbt_swag_extract(processes))){
190 xbt_tpool_queue_job(tpool, (void_f_pvoid_t)smx_ctx_sysv_resume_parallel, process->context);
194 smx_context_t smx_ctx_sysv_self_parallel(void)
196 smx_context_t self_context = (smx_context_t) xbt_os_thread_get_extra_data();
197 return self_context ? self_context : (smx_context_t) maestro_context;