#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.
(*smx_factory_initializer_to_use)(&(simix_global->context_factory));
}
else { /* use the factory specified by --cfg=contexts/factory:value */
- if (smx_context_factory_name == NULL || !strcmp(smx_context_factory_name, "ucontext")) {
+
+ if (smx_context_factory_name == NULL) {
+ /* use the default factory */
+#ifdef CONTEXT_UCONTEXT
+ SIMIX_ctx_sysv_factory_init(&simix_global->context_factory);
+#else
+ SIMIX_ctx_thread_factory_init(&simix_global->context_factory);
+#endif
+ }
+ else if (!strcmp(smx_context_factory_name, "ucontext")) {
/* use ucontext */
+#ifdef CONTEXT_UCONTEXT
SIMIX_ctx_sysv_factory_init(&simix_global->context_factory);
+#else
+ xbt_die("The ontext factory 'ucontext' unavailable on your system");
+#endif
}
else if (!strcmp(smx_context_factory_name, "thread")) {
/* use os threads (either pthreads or windows ones) */
*
* \param nb_threads the number of threads to use
*/
-void SIMIX_context_set_nthreads(int nb_threads) {
+XBT_INLINE void SIMIX_context_set_nthreads(int nb_threads) {
+
+ xbt_assert(nb_threads > 0, "Invalid number of parallel threads: %d", nb_threads);
+
+ if (nb_threads > 1) {
+#ifndef CONTEXT_THREADS
+ THROWF(arg_error, 0, "No thread support for parallel context execution");
+#endif
+ }
- xbt_assert1(nb_threads > 0, "Invalid number of parallel threads: %d", nb_threads);
smx_parallel_contexts = nb_threads;
}
* for the user contexts.
* \return the number of threads (1 means no parallelism)
*/
-int SIMIX_context_get_nthreads(void) {
+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(void) {
+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;
+}
+