#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;
-static int smx_parallel_contexts;
+#endif
+
+static int smx_parallel_contexts = 1;
+static int smx_parallel_threshold = 1;
/**
* This function is called by SIMIX_global_init() to initialize the context module.
*
* \param nb_threads the number of threads to use
*/
-void SIMIX_context_set_parallel_threads(int nb_threads) {
+XBT_INLINE void SIMIX_context_set_nthreads(int nb_threads) {
xbt_assert1(nb_threads > 0, "Invalid number of parallel threads: %d", nb_threads);
+
+ if (nb_threads > 1) {
+#ifndef CONTEXT_THREADS
+ THROW0(arg_error, 0, "No thread support for parallel context execution");
+#endif
+ }
+
smx_parallel_contexts = nb_threads;
}
* for the user contexts.
* \return the number of threads (1 means no parallelism)
*/
-int SIMIX_context_get_parallel_threads() {
+XBT_INLINE int SIMIX_context_get_nthreads(void) {
return smx_parallel_contexts;
}
* for the user contexts.
* \return 1 if parallelism is used
*/
-int SIMIX_context_is_parallel() {
+XBT_INLINE int SIMIX_context_is_parallel(void) {
return smx_parallel_contexts > 1;
}
+/**
+ * \brief Sets the threshold above which user processes are run in parallel.
+ *
+ * If the number of threads is set to 1, there is no parallelism and this
+ * threshold has no effect.
+ *
+ * \param threshold when the number of user processes ready to run is above
+ * this threshold, they are run in parallel
+ */
+XBT_INLINE void SIMIX_context_set_parallel_threshold(int threshold) {
+ smx_parallel_threshold = threshold;
+}
+
+/**
+ * \brief Returns the threshold above which user processes are run in parallel.
+ *
+ * If the number of threads is set to 1, there is no parallelism and this
+ * threshold has no effect.
+ *
+ * \return when the number of user processes ready to run is above
+ * this threshold, they are run in parallel
+ */
+XBT_INLINE int SIMIX_context_get_parallel_threshold(void) {
+ return smx_parallel_threshold;
+}
+