-/* $Id$ */
-
/* context_thread - implementation of context switching with native threads */
-/* Copyright (c) 2004-2008 the SimGrid team. All right reserved */
+/* Copyright (c) 2009-2014. The SimGrid Team.
+ * All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
#include "xbt/function_types.h"
-#include "private.h"
-
+#include "smx_private.h"
#include "portable.h" /* loads context system definitions */
#include "xbt/swag.h"
#include "xbt/xbt_os_thread.h"
#include "xbt_modinter.h" /* prototype of os thread module's init/exit in XBT */
-#include "simix/smx_context_private.h"
XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simix_context);
xbt_os_sem_t end; /* this semaphore is used to schedule/unschedule the process */
} s_smx_ctx_thread_t, *smx_ctx_thread_t;
+static xbt_os_sem_t smx_ctx_thread_sem;
+
static smx_context_t
-smx_ctx_thread_factory_create_context(xbt_main_func_t code, int argc, char** argv,
- void_f_pvoid_t cleanup_func, void* cleanup_arg);
+smx_ctx_thread_factory_create_context(xbt_main_func_t code,
+ int argc, char **argv,
+ void_pfn_smxprocess_t cleanup_func,
+ smx_process_t process);
static void smx_ctx_thread_free(smx_context_t context);
static void smx_ctx_thread_stop(smx_context_t context);
static void smx_ctx_thread_suspend(smx_context_t context);
-static void smx_ctx_thread_resume(smx_context_t new_context);
+static void smx_ctx_thread_runall_serial(void);
+static void smx_ctx_thread_runall_parallel(void);
+static smx_context_t smx_ctx_thread_self(void);
+static int smx_ctx_thread_factory_finalize(smx_context_factory_t *factory);
static void *smx_ctx_thread_wrapper(void *param);
-void SIMIX_ctx_thread_factory_init(smx_context_factory_t * factory) {
-
+void SIMIX_ctx_thread_factory_init(smx_context_factory_t * factory)
+{
smx_ctx_base_factory_init(factory);
+ XBT_VERB("Activating thread context factory");
+ (*factory)->finalize = smx_ctx_thread_factory_finalize;
(*factory)->create_context = smx_ctx_thread_factory_create_context;
/* Do not overload that method (*factory)->finalize */
(*factory)->free = smx_ctx_thread_free;
(*factory)->stop = smx_ctx_thread_stop;
(*factory)->suspend = smx_ctx_thread_suspend;
- (*factory)->resume = smx_ctx_thread_resume;
+
+ if (SIMIX_context_is_parallel())
+ (*factory)->runall = smx_ctx_thread_runall_parallel;
+ else
+ (*factory)->runall = smx_ctx_thread_runall_serial;
+
+ (*factory)->self = smx_ctx_thread_self;
(*factory)->name = "ctx_thread_factory";
+
+ if (SIMIX_context_is_parallel()) {
+ smx_ctx_thread_sem = xbt_os_sem_init(SIMIX_context_get_nthreads());
+ } else {
+ smx_ctx_thread_sem = NULL;
+ }
}
-static smx_context_t
-smx_ctx_thread_factory_create_context(xbt_main_func_t code, int argc, char** argv,
- void_f_pvoid_t cleanup_func, void* cleanup_arg)
+static int smx_ctx_thread_factory_finalize(smx_context_factory_t *factory)
{
- smx_ctx_thread_t context = (smx_ctx_thread_t)smx_ctx_base_factory_create_context_sized
- (sizeof(s_smx_ctx_thread_t), code,argc,argv,cleanup_func,cleanup_arg);
+ if (smx_ctx_thread_sem) {
+ xbt_os_sem_destroy(smx_ctx_thread_sem);
+ smx_ctx_thread_sem = NULL;
+ }
+ return smx_ctx_base_factory_finalize(factory);
+}
+
+static smx_context_t
+smx_ctx_thread_factory_create_context(xbt_main_func_t code, int argc,
+ char **argv,
+ void_pfn_smxprocess_t cleanup_func,
+ smx_process_t process)
+{
+ smx_ctx_thread_t context = (smx_ctx_thread_t)
+ smx_ctx_base_factory_create_context_sized(sizeof(s_smx_ctx_thread_t),
+ code, argc, argv,
+ cleanup_func, process);
/* If the user provided a function for the process then use it
otherwise is the context for maestro */
- if(code){
+ if (code) {
context->begin = xbt_os_sem_init(0);
context->end = xbt_os_sem_init(0);
-
+ if (smx_context_stack_size_was_set)
+ xbt_os_thread_setstacksize(smx_context_stack_size);
+ if (smx_context_guard_size_was_set)
+ xbt_os_thread_setguardsize(smx_context_guard_size);
/* create and start the process */
/* NOTE: The first argument to xbt_os_thread_create used to be the process *
- * name, but now the name is stored at SIMIX level, so we pass a null */
+ * name, but now the name is stored at SIMIX level, so we pass a null */
context->thread =
- xbt_os_thread_create(NULL, smx_ctx_thread_wrapper, context);
+ xbt_os_thread_create(NULL, smx_ctx_thread_wrapper, context, context);
+
/* wait the starting of the newly created process */
xbt_os_sem_acquire(context->end);
+
+ } else {
+ xbt_os_thread_set_extra_data(context);
}
-
- return (smx_context_t)context;
+
+ return (smx_context_t) context;
}
static void smx_ctx_thread_free(smx_context_t pcontext)
{
- smx_ctx_thread_t context = (smx_ctx_thread_t)pcontext;
+ smx_ctx_thread_t context = (smx_ctx_thread_t) pcontext;
- /* check if this is the context of maestro (it doesn't has a real thread) */
+ /* check if this is the context of maestro (it doesn't have a real thread) */
if (context->thread) {
/* wait about the thread terminason */
xbt_os_thread_join(context->thread, NULL);
-
+
/* destroy the synchronisation objects */
xbt_os_sem_destroy(context->begin);
xbt_os_sem_destroy(context->end);
}
-
+
smx_ctx_base_free(pcontext);
}
static void smx_ctx_thread_stop(smx_context_t pcontext)
{
+ smx_ctx_thread_t context = (smx_ctx_thread_t) pcontext;
- smx_ctx_thread_t context = (smx_ctx_thread_t)pcontext;
-
/* please no debug here: our procdata was already free'd */
smx_ctx_base_stop(pcontext);
+ if (smx_ctx_thread_sem) /* parallel run */
+ xbt_os_sem_release(smx_ctx_thread_sem);
+
/* signal to the maestro that it has finished */
xbt_os_sem_release(((smx_ctx_thread_t) context)->end);
/* exit */
/* We should provide return value in case other wants it */
- xbt_os_thread_exit(NULL);
+ xbt_os_thread_exit(NULL);
}
static void *smx_ctx_thread_wrapper(void *param)
{
smx_ctx_thread_t context = (smx_ctx_thread_t) param;
+ /* Install alternate signal stack, for SIGSEGV handler. */
+ stack_t stack;
+ stack.ss_sp = sigsegv_stack;
+ stack.ss_size = sizeof sigsegv_stack;
+ stack.ss_flags = 0;
+ sigaltstack(&stack, NULL);
+
/* Tell the maestro we are starting, and wait for its green light */
xbt_os_sem_release(context->end);
xbt_os_sem_acquire(context->begin);
+ if (smx_ctx_thread_sem) /* parallel run */
+ xbt_os_sem_acquire(smx_ctx_thread_sem);
(context->super.code) (context->super.argc, context->super.argv);
- smx_ctx_thread_stop((smx_context_t)context);
+ smx_ctx_thread_stop((smx_context_t) context);
return NULL;
}
-static void smx_ctx_thread_suspend(smx_context_t context) {
+static void smx_ctx_thread_suspend(smx_context_t context)
+{
+ if (smx_ctx_thread_sem) /* parallel run */
+ xbt_os_sem_release(smx_ctx_thread_sem);
xbt_os_sem_release(((smx_ctx_thread_t) context)->end);
xbt_os_sem_acquire(((smx_ctx_thread_t) context)->begin);
+ if (smx_ctx_thread_sem) /* parallel run */
+ xbt_os_sem_acquire(smx_ctx_thread_sem);
}
-static void smx_ctx_thread_resume(smx_context_t new_context) {
- xbt_os_sem_release(((smx_ctx_thread_t) new_context)->begin);
- xbt_os_sem_acquire(((smx_ctx_thread_t) new_context)->end);
+static void smx_ctx_thread_runall_serial(void)
+{
+ smx_process_t process;
+ unsigned int cursor;
+
+ xbt_dynar_foreach(simix_global->process_to_run, cursor, process) {
+ xbt_os_sem_release(((smx_ctx_thread_t) process->context)->begin);
+ xbt_os_sem_acquire(((smx_ctx_thread_t) process->context)->end);
+ }
+}
+
+static void smx_ctx_thread_runall_parallel(void)
+{
+ unsigned int index;
+ smx_process_t process;
+
+ xbt_dynar_foreach(simix_global->process_to_run, index, process)
+ xbt_os_sem_release(((smx_ctx_thread_t) process->context)->begin);
+
+ xbt_dynar_foreach(simix_global->process_to_run, index, process) {
+ xbt_os_sem_acquire(((smx_ctx_thread_t) process->context)->end);
+ }
+}
+
+static smx_context_t smx_ctx_thread_self(void)
+{
+ return (smx_context_t) xbt_os_thread_get_extra_data();
}
