#include "xbt/swag.h"
#include "private.h"
#include "simix/context.h"
+#include "gras_config.h"
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_context, simix,
"Context switching mecanism");
char* smx_context_factory_name = NULL; /* factory name specified by --cfg=contexts/factory:value */
smx_ctx_factory_initializer_t smx_factory_initializer_to_use = NULL;
int smx_context_stack_size = 128 * 1024;
+
+#ifdef CONTEXT_THREADS
+__thread smx_context_t smx_current_context;
+#else
smx_context_t smx_current_context;
+#endif
+
+static int smx_parallel_contexts = 1;
/**
* This function is called by SIMIX_global_init() to initialize the context module.
}
xbt_dict_remove((xbt_dict_t) _surf_cfg_set,"contexts/factory");
}
+
+/**
+ * \brief Sets the number of parallel threads to use
+ * for the user contexts.
+ *
+ * This function should be called before initializing SIMIX.
+ * A value of 1 means no parallelism.
+ * If the value is greater than 1, the thread support must be enabled.
+ *
+ * \param nb_threads the number of threads to use
+ */
+void SIMIX_context_set_nthreads(int nb_threads) {
+
+ xbt_assert1(nb_threads > 0, "Invalid number of parallel threads: %d", nb_threads);
+ smx_parallel_contexts = nb_threads;
+}
+
+/**
+ * \brief Returns the number of parallel threads used
+ * for the user contexts.
+ * \return the number of threads (1 means no parallelism)
+ */
+int SIMIX_context_get_nthreads(void) {
+ return smx_parallel_contexts;
+}
+
+/**
+ * \brief Returns whether some parallel threads are used
+ * for the user contexts.
+ * \return 1 if parallelism is used
+ */
+int SIMIX_context_is_parallel(void) {
+ return smx_parallel_contexts > 1;
+}
+