static xbt_os_cond_t creation_cond;
#endif
-static void __context_exit(xbt_context_t context, int value);
-static void __xbt_context_yield(xbt_context_t context)
-{
- xbt_assert0(current_context, "You have to call context_init() first.");
-
- DEBUG2
- ("--------- current_context (%p) is yielding to context(%p) ---------",
- current_context, context);
-
-#ifdef CONTEXT_THREADS
- if (context) {
- xbt_context_t self = current_context;
- DEBUG2("[%p] **** Locking ctx %p ****", self, context);
- xbt_os_mutex_lock(context->mutex);
- DEBUG1("[%p] **** Updating current_context ****", self);
- current_context = context;
- DEBUG1("[%p] **** Releasing the prisonner ****", self);
- xbt_os_cond_signal(context->cond);
- DEBUG3("[%p] **** Going to jail on individual %p/%p ****", self,
- context->cond, context->mutex);
- xbt_os_cond_wait(context->cond, context->mutex);
- DEBUG2("[%p] **** Unlocking individual %p ****", self, context->mutex);
- xbt_os_mutex_unlock(context->mutex);
- DEBUG1("[%p] **** Updating current_context ****", self);
- current_context = self;
- }
-#else /* use SUSv2 contexts */
- VOIRP(current_context);
- if (current_context)
- VOIRP(current_context->save);
-
- VOIRP(context);
-
- if (context)
- VOIRP(context->save);
-
- if (context) {
-
- int return_value = 0;
-
- if (context->save == NULL) {
-
- DEBUG1("[%p] **** Yielding to somebody else ****", current_context);
- DEBUG2("Saving current_context value (%p) to context(%p)->save",
- current_context, context);
- context->save = current_context;
- DEBUG1("current_context becomes context(%p) ", context);
- current_context = context;
- DEBUG1
- ("Current position memorized (context->save). Jumping to context (%p)",
- context);
- return_value = swapcontext(&(context->save->uc), &(context->uc));
- xbt_assert0((return_value == 0), "Context swapping failure");
- DEBUG1("I am (%p). Coming back\n", context);
- } else {
- xbt_context_t old_context = context->save;
- DEBUG1("[%p] **** Back ! ****", context);
- DEBUG2("Setting current_context (%p) to context(%p)->save",
- current_context, context);
- current_context = context->save;
- DEBUG1("Setting context(%p)->save to NULL", context);
- context->save = NULL;
- DEBUG2("Current position memorized (%p). Jumping to context (%p)",
- context, old_context);
- return_value = swapcontext(&(context->uc), &(old_context->uc));
- xbt_assert0((return_value == 0), "Context swapping failure");
- DEBUG1("I am (%p). Coming back\n", context);
-
- }
- }
-#endif
- if (current_context->iwannadie)
- __context_exit(current_context, 1);
-
- return;
-}
-
-static void xbt_context_free(xbt_context_t context)
-{
- if (!context)
- return;
- DEBUG1("Freeing %p", context);
- free(context->name);
-#ifdef CONTEXT_THREADS
- /*DEBUG1("\t joining %p",(void *)context->thread->t); */
- DEBUG1("\t joining %p", (void *) context->thread);
-
- xbt_os_thread_join(context->thread, NULL);
-
- DEBUG1("\t mutex_destroy %p", (void *) context->mutex);
- xbt_os_mutex_destroy(context->mutex);
- DEBUG1("\t cond_destroy %p", (void *) context->cond);
- xbt_os_cond_destroy(context->cond);
-
- context->thread = NULL;
- context->mutex = NULL;
- context->cond = NULL;
-#else
- if (context->exception)
- free(context->exception);
-#endif
-
- free(context);
- return;
-}
-
-static void __context_exit(xbt_context_t context, int value)
-{
- int i;
-
- DEBUG1("--------- %p is exiting ---------", context);
-
- DEBUG0("Calling cleanup functions");
- if (context->cleanup_func) {
- DEBUG0("Calling cleanup function");
- context->cleanup_func(context->cleanup_arg);
- }
-
- DEBUG0("Freeing arguments");
- for (i = 0; i < context->argc; i++)
- if (context->argv[i])
- free(context->argv[i]);
-
- if (context->argv)
- free(context->argv);
-
- DEBUG0("Putting context in the to_destroy set");
- xbt_swag_remove(context, context_living);
- xbt_swag_insert(context, context_to_destroy);
- DEBUG0("Context put in the to_destroy set");
-
- DEBUG0("Yielding");
-
-#ifdef CONTEXT_THREADS
- DEBUG2("[%p] **** Locking %p ****", context, context->mutex);
- xbt_os_mutex_lock(context->mutex);
-/* DEBUG1("[%p] **** Updating current_context ****"); */
-/* current_context = context; */
- DEBUG1("[%p] **** Releasing the prisonner ****", context);
- xbt_os_cond_signal(context->cond);
- DEBUG2("[%p] **** Unlocking individual %p ****", context,
- context->mutex);
- xbt_os_mutex_unlock(context->mutex);
- DEBUG1("[%p] **** Exiting ****", context);
- xbt_os_thread_exit(NULL); // We should provide return value in case other wants it
-#else
- __xbt_context_yield(context);
-#endif
- xbt_assert0(0, "You can't be here!");
-}
-
-static void *__context_wrapper(void *c)
-{
- xbt_context_t context = current_context;
-
-#ifdef CONTEXT_THREADS
- context = (xbt_context_t) c;
- context->thread = xbt_os_thread_self();
-
- DEBUG3("**[ctx:%p;self:%p]** Lock creation_mutex %p ****", context,
- (void *) xbt_os_thread_self(), creation_mutex);
- xbt_os_mutex_lock(creation_mutex);
- xbt_os_mutex_lock(context->mutex);
-
- DEBUG4
- ("**[ctx:%p;self:%p]** Releasing the creator (creation_cond %p,%p) ****",
- context, (void *) xbt_os_thread_self(), creation_cond,
- creation_mutex);
- xbt_os_cond_signal(creation_cond);
- xbt_os_mutex_unlock(creation_mutex);
-
- DEBUG4("**[ctx:%p;self:%p]** Going to Jail on lock %p and cond %p ****",
- context, (void *) xbt_os_thread_self(), context->mutex,
- context->cond);
- xbt_os_cond_wait(context->cond, context->mutex);
-
- DEBUG3("**[ctx:%p;self:%p]** Unlocking individual %p ****",
- context, (void *) xbt_os_thread_self(), context->mutex);
- xbt_os_mutex_unlock(context->mutex);
-
-#endif
-
- if (context->startup_func)
- context->startup_func(context->startup_arg);
-
- DEBUG0("Calling the main function");
-
- __context_exit(context, (context->code) (context->argc, context->argv));
- return NULL;
-}
+/********************/
+/* Module init/exit */
+/********************/
#ifndef CONTEXT_THREADS
-/* callback: context fetching (used only with ucontext, os_thread deal with it for us otherwise) */
+/* callback: context fetching (used only with ucontext, os_thread deal with it
+ for us otherwise) */
static ex_ctx_t *_context_ex_ctx(void) {
return current_context->exception;
}
}
}
-/** Garbage collection
- *
- * Should be called some time to time to free the memory allocated for contexts
- * that have finished executing their main functions.
+/**
+ * This function kill all existing context and free all the memory
+ * that has been allocated in this module.
*/
-void xbt_context_empty_trash(void)
+void xbt_context_exit(void)
{
xbt_context_t context = NULL;
- DEBUG1("Emptying trashbin (%d contexts to free)",
- xbt_swag_size(context_to_destroy));
- while ((context = xbt_swag_extract(context_to_destroy)))
- xbt_context_free(context);
-}
-/**
- * \param context the context to start
- *
- * Calling this function prepares \a context to be run. It will
- however run effectively only when calling #xbt_context_schedule
- */
-void xbt_context_start(xbt_context_t context)
-{
+ xbt_context_empty_trash();
+ while ((context = xbt_swag_extract(context_living))) {
+ if (context != init_context) {
+ xbt_context_kill(context);
+ }
+ }
#ifdef CONTEXT_THREADS
- /* Launch the thread */
-
- DEBUG3("**[ctx:%p;self:%p]** Locking creation_mutex %p ****", context,
- xbt_os_thread_self(), creation_mutex);
- xbt_os_mutex_lock(creation_mutex);
+ xbt_os_mutex_destroy(creation_mutex);
+ xbt_os_cond_destroy(creation_cond);
+#else
+ free(init_context->exception);
+#endif
+ free(init_context);
+ init_context = current_context = NULL;
- DEBUG2("**[ctx:%p;self:%p]** Thread create ****", context,
- xbt_os_thread_self());
- context->thread = xbt_os_thread_create(context->name,__context_wrapper, context);
- DEBUG3("**[ctx:%p;self:%p]** Thread created : %p ****", context,
- xbt_os_thread_self(), context->thread);
+ xbt_context_empty_trash();
+ xbt_swag_free(context_to_destroy);
+ xbt_swag_free(context_living);
- DEBUG4
- ("**[ctx:%p;self:%p]** Going to jail on creation_cond/mutex (%p,%p) ****",
- context, xbt_os_thread_self(), creation_cond, creation_mutex);
- xbt_os_cond_wait(creation_cond, creation_mutex);
- DEBUG3("**[ctx:%p;self:%p]** Unlocking creation %p ****", context,
- xbt_os_thread_self(), creation_mutex);
- xbt_os_mutex_unlock(creation_mutex);
-#else
- makecontext(&(context->uc), (void (*)(void)) __context_wrapper, 1,
- context);
-#endif
- return;
}
+/*******************************/
+/* Object creation/destruction */
+/*******************************/
/**
* \param code a main function
* \param startup_func a function to call when running the context for
return res;
}
-/**
- * Calling this function makes the current context yield. The context
- * that scheduled it returns from xbt_context_schedule as if nothing
- * had happened.
- */
-void xbt_context_yield(void)
-{
- __xbt_context_yield(current_context);
-}
-
-/**
- * \param context the winner
- *
- * Calling this function blocks the current context and schedule \a context.
- * When \a context will call xbt_context_yield, it will return
- * to this function as if nothing had happened.
+static void xbt_context_free(xbt_context_t context) {
+ if (!context)
+ return;
+ DEBUG1("Freeing %p", context);
+ free(context->name);
+#ifdef CONTEXT_THREADS
+ /*DEBUG1("\t joining %p",(void *)context->thread->t); */
+ DEBUG1("\t joining %p", (void *) context->thread);
+
+ xbt_os_thread_join(context->thread, NULL);
+
+ DEBUG1("\t mutex_destroy %p", (void *) context->mutex);
+ xbt_os_mutex_destroy(context->mutex);
+ DEBUG1("\t cond_destroy %p", (void *) context->cond);
+ xbt_os_cond_destroy(context->cond);
+
+ context->thread = NULL;
+ context->mutex = NULL;
+ context->cond = NULL;
+#else
+ if (context->exception)
+ free(context->exception);
+#endif
+
+ free(context);
+ return;
+}
+
+/************************/
+/* Start/stop a context */
+/************************/
+static void xbt_context_stop(xbt_context_t context, int value);
+
+static void *__context_wrapper(void *c)
+{
+ xbt_context_t context = current_context;
+
+#ifdef CONTEXT_THREADS
+ context = (xbt_context_t) c;
+ context->thread = xbt_os_thread_self();
+
+ DEBUG3("**[ctx:%p;self:%p]** Lock creation_mutex %p ****", context,
+ (void *) xbt_os_thread_self(), creation_mutex);
+ xbt_os_mutex_lock(creation_mutex);
+ xbt_os_mutex_lock(context->mutex);
+
+ DEBUG4
+ ("**[ctx:%p;self:%p]** Releasing the creator (creation_cond %p,%p) ****",
+ context, (void *) xbt_os_thread_self(), creation_cond,
+ creation_mutex);
+ xbt_os_cond_signal(creation_cond);
+ xbt_os_mutex_unlock(creation_mutex);
+
+ DEBUG4("**[ctx:%p;self:%p]** Going to Jail on lock %p and cond %p ****",
+ context, (void *) xbt_os_thread_self(), context->mutex,
+ context->cond);
+ xbt_os_cond_wait(context->cond, context->mutex);
+
+ DEBUG3("**[ctx:%p;self:%p]** Unlocking individual %p ****",
+ context, (void *) xbt_os_thread_self(), context->mutex);
+ xbt_os_mutex_unlock(context->mutex);
+
+#endif
+
+ if (context->startup_func)
+ context->startup_func(context->startup_arg);
+
+ DEBUG0("Calling the main function");
+
+ xbt_context_stop(context, (context->code) (context->argc, context->argv));
+ return NULL;
+}
+/**
+ * \param context the context to start
+ *
+ * Calling this function prepares \a context to be run. It will
+ however run effectively only when calling #xbt_context_schedule
*/
-void xbt_context_schedule(xbt_context_t context)
+void xbt_context_start(xbt_context_t context)
{
- DEBUG1("Scheduling %p", context);
- xbt_assert0((current_context == init_context),
- "You are not supposed to run this function here!");
+#ifdef CONTEXT_THREADS
+ /* Launch the thread */
+
+ DEBUG3("**[ctx:%p;self:%p]** Locking creation_mutex %p ****", context,
+ xbt_os_thread_self(), creation_mutex);
+ xbt_os_mutex_lock(creation_mutex);
+
+ DEBUG2("**[ctx:%p;self:%p]** Thread create ****", context,
+ xbt_os_thread_self());
+ context->thread = xbt_os_thread_create(context->name,__context_wrapper, context);
+ DEBUG3("**[ctx:%p;self:%p]** Thread created : %p ****", context,
+ xbt_os_thread_self(), context->thread);
+
+ DEBUG4
+ ("**[ctx:%p;self:%p]** Going to jail on creation_cond/mutex (%p,%p) ****",
+ context, xbt_os_thread_self(), creation_cond, creation_mutex);
+ xbt_os_cond_wait(creation_cond, creation_mutex);
+ DEBUG3("**[ctx:%p;self:%p]** Unlocking creation %p ****", context,
+ xbt_os_thread_self(), creation_mutex);
+ xbt_os_mutex_unlock(creation_mutex);
+#else
+ makecontext(&(context->uc), (void (*)(void)) __context_wrapper, 1,
+ context);
+#endif
+ return;
+}
+
+static void xbt_context_stop(xbt_context_t context, int value)
+{
+ int i;
+
+ DEBUG1("--------- %p is exiting ---------", context);
+
+ DEBUG0("Calling cleanup functions");
+ if (context->cleanup_func) {
+ DEBUG0("Calling cleanup function");
+ context->cleanup_func(context->cleanup_arg);
+ }
+
+ DEBUG0("Freeing arguments");
+ for (i = 0; i < context->argc; i++)
+ if (context->argv[i])
+ free(context->argv[i]);
+
+ if (context->argv)
+ free(context->argv);
+
+ DEBUG0("Putting context in the to_destroy set");
+ xbt_swag_remove(context, context_living);
+ xbt_swag_insert(context, context_to_destroy);
+ DEBUG0("Context put in the to_destroy set");
+
+ DEBUG0("Yielding");
+
+#ifdef CONTEXT_THREADS
+ DEBUG2("[%p] **** Locking %p ****", context, context->mutex);
+ xbt_os_mutex_lock(context->mutex);
+/* DEBUG1("[%p] **** Updating current_context ****"); */
+/* current_context = context; */
+ DEBUG1("[%p] **** Releasing the prisonner ****", context);
+ xbt_os_cond_signal(context->cond);
+ DEBUG2("[%p] **** Unlocking individual %p ****", context,
+ context->mutex);
+ xbt_os_mutex_unlock(context->mutex);
+ DEBUG1("[%p] **** Exiting ****", context);
+ xbt_os_thread_exit(NULL); // We should provide return value in case other wants it
+#else
__xbt_context_yield(context);
+#endif
+ xbt_assert0(0, "You can't be here!");
}
-/**
- * This function kill all existing context and free all the memory
- * that has been allocated in this module.
+
+
+/** Garbage collection
+ *
+ * Should be called some time to time to free the memory allocated for contexts
+ * that have finished executing their main functions.
*/
-void xbt_context_exit(void)
+void xbt_context_empty_trash(void)
{
xbt_context_t context = NULL;
+ DEBUG1("Emptying trashbin (%d contexts to free)",
+ xbt_swag_size(context_to_destroy));
+ while ((context = xbt_swag_extract(context_to_destroy)))
+ xbt_context_free(context);
+}
+
+/*********************/
+/* context switching */
+/*********************/
+
+static void __xbt_context_yield(xbt_context_t context)
+{
+ xbt_assert0(current_context, "You have to call context_init() first.");
+
+ DEBUG2
+ ("--------- current_context (%p) is yielding to context(%p) ---------",
+ current_context, context);
+
+#ifdef CONTEXT_THREADS
+ if (context) {
+ xbt_context_t self = current_context;
+ DEBUG2("[%p] **** Locking ctx %p ****", self, context);
+ xbt_os_mutex_lock(context->mutex);
+ DEBUG1("[%p] **** Updating current_context ****", self);
+ current_context = context;
+ DEBUG1("[%p] **** Releasing the prisonner ****", self);
+ xbt_os_cond_signal(context->cond);
+ DEBUG3("[%p] **** Going to jail on individual %p/%p ****", self,
+ context->cond, context->mutex);
+ xbt_os_cond_wait(context->cond, context->mutex);
+ DEBUG2("[%p] **** Unlocking individual %p ****", self, context->mutex);
+ xbt_os_mutex_unlock(context->mutex);
+ DEBUG1("[%p] **** Updating current_context ****", self);
+ current_context = self;
+ }
+#else /* use SUSv2 contexts */
+ VOIRP(current_context);
+ if (current_context)
+ VOIRP(current_context->save);
+
+ VOIRP(context);
+
+ if (context)
+ VOIRP(context->save);
+
+ if (context) {
+
+ int return_value = 0;
+
+ if (context->save == NULL) {
+
+ DEBUG1("[%p] **** Yielding to somebody else ****", current_context);
+ DEBUG2("Saving current_context value (%p) to context(%p)->save",
+ current_context, context);
+ context->save = current_context;
+ DEBUG1("current_context becomes context(%p) ", context);
+ current_context = context;
+ DEBUG1
+ ("Current position memorized (context->save). Jumping to context (%p)",
+ context);
+ return_value = swapcontext(&(context->save->uc), &(context->uc));
+ xbt_assert0((return_value == 0), "Context swapping failure");
+ DEBUG1("I am (%p). Coming back\n", context);
+ } else {
+ xbt_context_t old_context = context->save;
+ DEBUG1("[%p] **** Back ! ****", context);
+ DEBUG2("Setting current_context (%p) to context(%p)->save",
+ current_context, context);
+ current_context = context->save;
+ DEBUG1("Setting context(%p)->save to NULL", context);
+ context->save = NULL;
+ DEBUG2("Current position memorized (%p). Jumping to context (%p)",
+ context, old_context);
+ return_value = swapcontext(&(context->uc), &(old_context->uc));
+ xbt_assert0((return_value == 0), "Context swapping failure");
+ DEBUG1("I am (%p). Coming back\n", context);
- xbt_context_empty_trash();
- while ((context = xbt_swag_extract(context_living))) {
- if (context != init_context) {
- xbt_context_kill(context);
}
}
-#ifdef CONTEXT_THREADS
- xbt_os_mutex_destroy(creation_mutex);
- xbt_os_cond_destroy(creation_cond);
-#else
- free(init_context->exception);
#endif
- free(init_context);
- init_context = current_context = NULL;
+ if (current_context->iwannadie)
+ xbt_context_stop(current_context, 1);
+
+ return;
+}
+
- xbt_context_empty_trash();
- xbt_swag_free(context_to_destroy);
- xbt_swag_free(context_living);
+
+
+/**
+ * Calling this function makes the current context yield. The context
+ * that scheduled it returns from xbt_context_schedule as if nothing
+ * had happened.
+ */
+void xbt_context_yield(void)
+{
+ __xbt_context_yield(current_context);
}
+/**
+ * \param context the winner
+ *
+ * Calling this function blocks the current context and schedule \a context.
+ * When \a context will call xbt_context_yield, it will return
+ * to this function as if nothing had happened.
+ */
+void xbt_context_schedule(xbt_context_t context)
+{
+ DEBUG1("Scheduling %p", context);
+ xbt_assert0((current_context == init_context),
+ "You are not supposed to run this function here!");
+ __xbt_context_yield(context);
+}
+
+
/**
* \param context poor victim
*
return;
}
-/* @} */
-
-/* Stub of the stuff to interact with JAVA threads; not used in native lib */
-void xbt_context_set_jprocess(xbt_context_t context, void *jp)
-{
-}
-void *xbt_context_get_jprocess(xbt_context_t context)
-{
- return NULL;
-}
+/* Java cruft I'm gonna kill in the next cleanup round */
+void xbt_context_set_jprocess(xbt_context_t context, void *jp){}
+void* xbt_context_get_jprocess(xbt_context_t context){return NULL;}
+void xbt_context_set_jmutex(xbt_context_t context,void *jm){}
+void* xbt_context_get_jmutex(xbt_context_t context){return NULL;}
+void xbt_context_set_jcond(xbt_context_t context,void *jc){}
+void* xbt_context_get_jcond(xbt_context_t context){return NULL;}
+void xbt_context_set_jenv(xbt_context_t context,void* je){}
+void* xbt_context_get_jenv(xbt_context_t context){return NULL;}
-void xbt_context_set_jmutex(xbt_context_t context, void *jm)
-{
-}
-void *xbt_context_get_jmutex(xbt_context_t context)
-{
- return NULL;
-}
-
-void xbt_context_set_jcond(xbt_context_t context, void *jc)
-{
-}
-void *xbt_context_get_jcond(xbt_context_t context)
-{
- return NULL;
-}
-
-void xbt_context_set_jenv(xbt_context_t context, void *je)
-{
-}
-void *xbt_context_get_jenv(xbt_context_t context)
-{
- return NULL;
-}
+/* @} */
