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/parmap.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_parmap_t parmap;
29 smx_ctx_sysv_create_context(xbt_main_func_t code, int argc, char **argv,
30 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 #ifdef CONTEXT_THREADS /* To use parallel ucontexts a thread pool is needed */
48 parmap = xbt_parmap_new(2);
49 (*factory)->runall = smx_ctx_sysv_runall_parallel;
50 (*factory)->self = smx_ctx_sysv_self_parallel;
52 THROW0(arg_error, 0, "No thread support for parallel context execution");
55 (*factory)->runall = smx_ctx_sysv_runall;
59 int smx_ctx_sysv_factory_finalize(smx_context_factory_t *factory)
62 xbt_parmap_destroy(parmap);
63 return smx_ctx_base_factory_finalize(factory);
67 smx_ctx_sysv_create_context_sized(size_t size, xbt_main_func_t code,
68 int argc, char **argv,
69 void_pfn_smxprocess_t cleanup_func,
73 smx_ctx_sysv_t context =
74 (smx_ctx_sysv_t) smx_ctx_base_factory_create_context_sized(size,
81 /* If the user provided a function for the process then use it
82 otherwise is the context for maestro */
85 xbt_assert2(getcontext(&(context->uc)) == 0,
86 "Error in context saving: %d (%s)", errno,
89 context->uc.uc_link = NULL;
91 context->uc.uc_stack.ss_sp =
92 pth_skaddr_makecontext(context->stack, CONTEXT_STACK_SIZE);
94 context->uc.uc_stack.ss_size =
95 pth_sksize_makecontext(context->stack, CONTEXT_STACK_SIZE);
97 #ifdef HAVE_VALGRIND_VALGRIND_H
98 context->valgrind_stack_id =
99 VALGRIND_STACK_REGISTER(context->uc.uc_stack.ss_sp,
100 ((char *) context->uc.uc_stack.ss_sp) +
101 context->uc.uc_stack.ss_size);
102 #endif /* HAVE_VALGRIND_VALGRIND_H */
104 makecontext(&((smx_ctx_sysv_t) context)->uc, (void (*)())smx_ctx_sysv_wrapper,
105 sizeof(void*)/sizeof(int), context);
107 maestro_context = context;
110 return (smx_context_t) context;
115 smx_ctx_sysv_create_context(xbt_main_func_t code, int argc, char **argv,
116 void_pfn_smxprocess_t cleanup_func,
120 return smx_ctx_sysv_create_context_sized(sizeof(s_smx_ctx_sysv_t),
121 code, argc, argv, cleanup_func,
126 void smx_ctx_sysv_free(smx_context_t context)
131 #ifdef HAVE_VALGRIND_VALGRIND_H
132 VALGRIND_STACK_DEREGISTER(((smx_ctx_sysv_t)
133 context)->valgrind_stack_id);
134 #endif /* HAVE_VALGRIND_VALGRIND_H */
137 smx_ctx_base_free(context);
140 void smx_ctx_sysv_stop(smx_context_t context)
142 smx_ctx_base_stop(context);
143 smx_ctx_sysv_suspend(context);
146 void smx_ctx_sysv_wrapper(smx_ctx_sysv_t context)
148 (context->super.code) (context->super.argc, context->super.argv);
150 smx_ctx_sysv_stop((smx_context_t) context);
153 void smx_ctx_sysv_suspend(smx_context_t context)
155 smx_current_context = (smx_context_t)maestro_context;
156 int rv = swapcontext(&((smx_ctx_sysv_t) context)->uc, &((smx_ctx_sysv_t)context)->old_uc);
158 xbt_assert0((rv == 0), "Context swapping failure");
161 void smx_ctx_sysv_resume(smx_context_t context)
163 smx_current_context = context;
164 int rv = swapcontext(&((smx_ctx_sysv_t)context)->old_uc, &((smx_ctx_sysv_t) context)->uc);
166 xbt_assert0((rv == 0), "Context swapping failure");
169 void smx_ctx_sysv_runall(xbt_dynar_t processes)
171 smx_process_t process;
173 while (xbt_dynar_length(processes)){
174 process = xbt_dynar_pop_as(processes,smx_process_t);
175 smx_ctx_sysv_resume(process->context);
179 void smx_ctx_sysv_resume_parallel(smx_process_t process)
181 smx_context_t context = process->context;
182 xbt_os_thread_set_extra_data(context);
183 int rv = swapcontext(&((smx_ctx_sysv_t)context)->old_uc, &((smx_ctx_sysv_t) context)->uc);
184 xbt_os_thread_set_extra_data(NULL);
186 xbt_assert0((rv == 0), "Context swapping failure");
189 void smx_ctx_sysv_runall_parallel(xbt_dynar_t processes)
191 xbt_parmap_apply(parmap, (void_f_pvoid_t)smx_ctx_sysv_resume_parallel, processes);
192 xbt_dynar_reset(processes);
195 smx_context_t smx_ctx_sysv_self_parallel(void)
197 smx_context_t self_context = (smx_context_t) xbt_os_thread_get_extra_data();
198 return self_context ? self_context : (smx_context_t) maestro_context;