X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/4a201b7ceece70d2bc461ac48c8b746a36d07243..23f5bf52cc58cf837840f231cf638e9fcd45097b:/src/simix/smx_context_thread.c diff --git a/src/simix/smx_context_thread.c b/src/simix/smx_context_thread.c index 75d998feb5..c8260dbcb6 100644 --- a/src/simix/smx_context_thread.c +++ b/src/simix/smx_context_thread.c @@ -1,18 +1,17 @@ /* context_thread - implementation of context switching with native threads */ -/* Copyright (c) 2004-2008 the SimGrid team. All right reserved */ +/* Copyright (c) 2009, 2010. 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); @@ -23,88 +22,125 @@ typedef struct s_smx_ctx_thread { 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, + void *data); 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, + void *data) +{ + 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, data); /* 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); - - /* 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) @@ -114,19 +150,50 @@ static void *smx_ctx_thread_wrapper(void *param) /* 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_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 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 smx_context_t smx_ctx_thread_self(void) +{ + return (smx_context_t) xbt_os_thread_get_extra_data(); }