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;
22 * This function is called by SIMIX_global_init() to initialize the context module.
24 void SIMIX_context_mod_init(void)
26 if (!simix_global->context_factory) {
27 /* select the context factory to use to create the contexts */
28 if (smx_factory_initializer_to_use) {
29 (*smx_factory_initializer_to_use)(&(simix_global->context_factory));
31 else { /* use the factory specified by --cfg=simix/ctx:value */
32 if (smx_context_factory_name == NULL || !strcmp(smx_context_factory_name, "ucontext")) {
34 SIMIX_ctx_sysv_factory_init(&simix_global->context_factory);
36 else if (!strcmp(smx_context_factory_name, "thread")) {
37 /* use os threads (either pthreads or windows ones) */
38 SIMIX_ctx_thread_factory_init(&simix_global->context_factory);
40 else if (!strcmp(smx_context_factory_name, "raw")) {
41 /* use raw contexts */
42 SIMIX_ctx_raw_factory_init(&simix_global->context_factory);
45 xbt_die("Invalid context factory specified");
52 * This function is call by SIMIX_clean() to finalize the context module.
54 void SIMIX_context_mod_exit(void)
56 if (simix_global->context_factory) {
57 smx_pfn_context_factory_finalize_t finalize_factory;
59 /* finalize the context factory */
60 finalize_factory = simix_global->context_factory->finalize;
61 (*finalize_factory) (&simix_global->context_factory);
63 xbt_free(smx_context_factory_name);