1 /* a fast and simple context switching library */
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. */
13 #include "simix/context.h"
15 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_context, simix,
16 "Context switching mecanism");
18 char* smx_context_factory_name = NULL; /* factory name specified by --cfg=simix/context=value */
19 smx_ctx_factory_initializer_t smx_factory_initializer_to_use = NULL;
20 smx_context_t smx_current_context;
23 * This function is called by SIMIX_global_init() to initialize the context module.
25 void SIMIX_context_mod_init(void)
27 if (!simix_global->context_factory) {
28 /* select the context factory to use to create the contexts */
29 if (smx_factory_initializer_to_use) {
30 (*smx_factory_initializer_to_use)(&(simix_global->context_factory));
32 else { /* use the factory specified by --cfg=simix/ctx:value */
33 if (smx_context_factory_name == NULL || !strcmp(smx_context_factory_name, "ucontext")) {
35 SIMIX_ctx_sysv_factory_init(&simix_global->context_factory);
37 else if (!strcmp(smx_context_factory_name, "thread")) {
38 /* use os threads (either pthreads or windows ones) */
39 SIMIX_ctx_thread_factory_init(&simix_global->context_factory);
41 else if (!strcmp(smx_context_factory_name, "raw")) {
42 /* use raw contexts */
43 SIMIX_ctx_raw_factory_init(&simix_global->context_factory);
46 xbt_die("Invalid context factory specified");
53 * This function is call by SIMIX_clean() to finalize the context module.
55 void SIMIX_context_mod_exit(void)
57 if (simix_global->context_factory) {
58 smx_pfn_context_factory_finalize_t finalize_factory;
60 /* finalize the context factory */
61 finalize_factory = simix_global->context_factory->finalize;
62 (*finalize_factory) (&simix_global->context_factory);
64 xbt_dict_remove((xbt_dict_t) _surf_cfg_set,"simix/context");