X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/edde8f7fbc1b74a81551bf9eb7bac1935b999296..aae6bdf486c3939fd15203a364c523ce91dad90b:/src/simix/smx_synchro.c

diff --git a/src/simix/smx_synchro.c b/src/simix/smx_synchro.c
index f5ccd07033..59ea411d37 100644
--- a/src/simix/smx_synchro.c
+++ b/src/simix/smx_synchro.c
@@ -1,63 +1,63 @@
-/* Copyright (c) 2007, 2008, 2009, 2010. The SimGrid Team.
+/* Copyright (c) 2007-2015. The SimGrid Team.
  * All rights reserved.                                                     */
 
 /* This program is free software; you can redistribute it and/or modify it
  * under the terms of the license (GNU LGPL) which comes with this package. */
 
-#include "private.h"
+#include "smx_private.h"
 #include "xbt/log.h"
 
 
 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_synchro, simix,
-                                "Logging specific to SIMIX (synchronization)");
+                                "SIMIX Synchronization (mutex, semaphores and conditions)");
 
-static smx_action_t SIMIX_synchro_wait(smx_host_t smx_host, double timeout);
-static void SIMIX_synchro_finish(smx_action_t action);
+static smx_synchro_t SIMIX_synchro_wait(sg_host_t smx_host, double timeout);
+static void SIMIX_synchro_finish(smx_synchro_t synchro);
 static void _SIMIX_cond_wait(smx_cond_t cond, smx_mutex_t mutex, double timeout,
-                             smx_process_t issuer, smx_req_t req);
+                             smx_process_t issuer, smx_simcall_t simcall);
 static void _SIMIX_sem_wait(smx_sem_t sem, double timeout, smx_process_t issuer,
-                            smx_req_t req);
+                            smx_simcall_t simcall);
 
-/***************************** Synchro action *********************************/
+/***************************** Raw synchronization *********************************/
 
-static smx_action_t SIMIX_synchro_wait(smx_host_t smx_host, double timeout)
+static smx_synchro_t SIMIX_synchro_wait(sg_host_t smx_host, double timeout)
 {
   XBT_IN("(%p, %f)",smx_host,timeout);
-  smx_action_t action;
-  action = xbt_mallocator_get(simix_global->action_mallocator);
-  action->type = SIMIX_ACTION_SYNCHRO;
-  action->name = xbt_strdup("synchro");
-  action->synchro.sleep = 
-    surf_workstation_model->extension.workstation.sleep(smx_host->host, timeout);
-
-  surf_workstation_model->action_data_set(action->synchro.sleep, action);
+
+  smx_synchro_t sync;
+  sync = xbt_mallocator_get(simix_global->synchro_mallocator);
+  sync->type = SIMIX_SYNC_SYNCHRO;
+  sync->name = xbt_strdup("synchro");
+  sync->synchro.sleep = surf_host_sleep(smx_host, timeout);
+
+  surf_action_set_data(sync->synchro.sleep, sync);
   XBT_OUT();
-  return action;
+  return sync;
 }
 
-void SIMIX_synchro_stop_waiting(smx_process_t process, smx_req_t req)
+void SIMIX_synchro_stop_waiting(smx_process_t process, smx_simcall_t simcall)
 {
-  XBT_IN("(%p, %p)",process,req);
-  switch (req->call) {
+  XBT_IN("(%p, %p)",process,simcall);
+  switch (simcall->call) {
 
-    case REQ_MUTEX_LOCK:
-      xbt_swag_remove(process, req->mutex_lock.mutex->sleeping);
+    case SIMCALL_MUTEX_LOCK:
+      xbt_swag_remove(process, simcall_mutex_lock__get__mutex(simcall)->sleeping);
       break;
 
-    case REQ_COND_WAIT:
-      xbt_swag_remove(process, req->cond_wait.cond->sleeping);
+    case SIMCALL_COND_WAIT:
+      xbt_swag_remove(process, simcall_cond_wait__get__cond(simcall)->sleeping);
       break;
 
-    case REQ_COND_WAIT_TIMEOUT:
-      xbt_swag_remove(process, req->cond_wait_timeout.cond->sleeping);
+    case SIMCALL_COND_WAIT_TIMEOUT:
+      xbt_swag_remove(process, simcall_cond_wait_timeout__get__cond(simcall)->sleeping);
       break;
 
-    case REQ_SEM_ACQUIRE:
-      xbt_swag_remove(process, req->sem_acquire.sem->sleeping);
+    case SIMCALL_SEM_ACQUIRE:
+      xbt_swag_remove(process, simcall_sem_acquire__get__sem(simcall)->sleeping);
       break;
 
-    case REQ_SEM_ACQUIRE_TIMEOUT:
-      xbt_swag_remove(process, req->sem_acquire_timeout.sem->sleeping);
+    case SIMCALL_SEM_ACQUIRE_TIMEOUT:
+      xbt_swag_remove(process, simcall_sem_acquire_timeout__get__sem(simcall)->sleeping);
       break;
 
     default:
@@ -66,51 +66,44 @@ void SIMIX_synchro_stop_waiting(smx_process_t process, smx_req_t req)
   XBT_OUT();
 }
 
-void SIMIX_synchro_destroy(smx_action_t action)
+void SIMIX_synchro_destroy(smx_synchro_t synchro)
 {
-  XBT_IN("(%p)",action);
-  XBT_DEBUG("Destroying synchro %p", action);
-  action->synchro.sleep->model_type->action_unref(action->synchro.sleep);
-  xbt_free(action->name);
-  xbt_mallocator_release(simix_global->action_mallocator, action);
+  XBT_IN("(%p)",synchro);
+  XBT_DEBUG("Destroying synchro %p", synchro);
+  xbt_assert(synchro->type == SIMIX_SYNC_SYNCHRO);
+  surf_action_unref(synchro->synchro.sleep);
+  xbt_free(synchro->name);
+  xbt_mallocator_release(simix_global->synchro_mallocator, synchro);
   XBT_OUT();
 }
 
-void SIMIX_post_synchro(smx_action_t action)
+void SIMIX_post_synchro(smx_synchro_t synchro)
 {
-  XBT_IN("(%p)",action);
-  if (surf_workstation_model->action_state_get(action->synchro.sleep) == SURF_ACTION_FAILED)
-    action->state = SIMIX_FAILED;
-  else if(surf_workstation_model->action_state_get(action->synchro.sleep) == SURF_ACTION_DONE)
-    action->state = SIMIX_SRC_TIMEOUT;
-
-  SIMIX_synchro_finish(action);  
+  XBT_IN("(%p)",synchro);
+  xbt_assert(synchro->type == SIMIX_SYNC_SYNCHRO);
+  if (surf_action_get_state(synchro->synchro.sleep) == SURF_ACTION_FAILED)
+    synchro->state = SIMIX_FAILED;
+  else if(surf_action_get_state(synchro->synchro.sleep) == SURF_ACTION_DONE)
+    synchro->state = SIMIX_SRC_TIMEOUT;
+
+  SIMIX_synchro_finish(synchro);  
   XBT_OUT();
 }
 
-static void SIMIX_synchro_finish(smx_action_t action)
+static void SIMIX_synchro_finish(smx_synchro_t synchro)
 {
-  XBT_IN("(%p)",action);
-  smx_req_t req = xbt_fifo_shift(action->request_list);
+  XBT_IN("(%p)",synchro);
+  smx_simcall_t simcall = xbt_fifo_shift(synchro->simcalls);
 
-  switch (action->state) {
+  switch (synchro->state) {
 
     case SIMIX_SRC_TIMEOUT:
-      TRY {
-        THROWF(timeout_error, 0, "Synchro's wait timeout");
-      }
-      CATCH(req->issuer->running_ctx->exception) {
-        req->issuer->doexception = 1;
-      }
+      SMX_EXCEPTION(simcall->issuer, timeout_error, 0, "Synchro's wait timeout");
       break;
 
     case SIMIX_FAILED:
-      TRY {
-        THROWF(host_error, 0, "Host failed");
-      }
-      CATCH(req->issuer->running_ctx->exception) {
-        req->issuer->doexception = 1;
-      }
+        simcall->issuer->context->iwannadie = 1;
+//      SMX_EXCEPTION(simcall->issuer, host_error, 0, "Host failed");
       break;
 
     default:
@@ -118,13 +111,17 @@ static void SIMIX_synchro_finish(smx_action_t action)
       break;
   }
 
-  SIMIX_synchro_stop_waiting(req->issuer, req);
-  SIMIX_synchro_destroy(action);
-  SIMIX_request_answer(req);
+  SIMIX_synchro_stop_waiting(simcall->issuer, simcall);
+  simcall->issuer->waiting_synchro = NULL;
+  SIMIX_synchro_destroy(synchro);
+  SIMIX_simcall_answer(simcall);
   XBT_OUT();
 }
 /*********************************** Mutex ************************************/
 
+smx_mutex_t simcall_HANDLER_mutex_init(smx_simcall_t simcall){
+  return SIMIX_mutex_init();
+}
 /**
  * \brief Initialize a mutex.
  *
@@ -144,33 +141,35 @@ smx_mutex_t SIMIX_mutex_init(void)
 }
 
 /**
- * \brief Handle mutex lock request
- * \param req The request
+ * \brief Handles a mutex lock simcall.
+ * \param simcall the simcall
  */
-void SIMIX_pre_mutex_lock(smx_req_t req)
+void simcall_HANDLER_mutex_lock(smx_simcall_t simcall, smx_mutex_t mutex)
 {
-  XBT_IN("(%p)",req);
+  XBT_IN("(%p)",simcall);
   /* FIXME: check where to validate the arguments */
-  smx_action_t sync_act = NULL;
-  smx_mutex_t mutex = req->mutex_lock.mutex;
-  smx_process_t process = req->issuer;
+  smx_synchro_t synchro = NULL;
+  smx_process_t process = simcall->issuer;
 
   if (mutex->locked) {
     /* FIXME: check if the host is active ? */
-    /* Somebody using the mutex, use a synchro action to get host failures */
-    sync_act = SIMIX_synchro_wait(process->smx_host, -1);
-    xbt_fifo_push(sync_act->request_list, req);
-    req->issuer->waiting_action = sync_act;
-    xbt_swag_insert(req->issuer, mutex->sleeping);   
+    /* Somebody using the mutex, use a synchronization to get host failures */
+    synchro = SIMIX_synchro_wait(process->host, -1);
+    xbt_fifo_push(synchro->simcalls, simcall);
+    simcall->issuer->waiting_synchro = synchro;
+    xbt_swag_insert(simcall->issuer, mutex->sleeping);   
   } else {
     /* mutex free */
     mutex->locked = 1;
-    mutex->owner = req->issuer;
-    SIMIX_request_answer(req);
+    mutex->owner = simcall->issuer;
+    SIMIX_simcall_answer(simcall);
   }
   XBT_OUT();
 }
 
+int simcall_HANDLER_mutex_trylock(smx_simcall_t simcall, smx_mutex_t mutex){
+  return SIMIX_mutex_trylock(mutex, simcall->issuer);
+}
 /**
  * \brief Tries to lock a mutex.
  *
@@ -184,8 +183,8 @@ int SIMIX_mutex_trylock(smx_mutex_t mutex, smx_process_t issuer)
 {
   XBT_IN("(%p, %p)",mutex,issuer);
   if (mutex->locked){
-	  XBT_OUT();
-	  return 0;
+    XBT_OUT();
+    return 0;
   }
 
   mutex->locked = 1;
@@ -194,6 +193,9 @@ int SIMIX_mutex_trylock(smx_mutex_t mutex, smx_process_t issuer)
   return 1;
 }
 
+void simcall_HANDLER_mutex_unlock(smx_simcall_t simcall, smx_mutex_t mutex){
+   SIMIX_mutex_unlock(mutex, simcall->issuer);
+}
 /**
  * \brief Unlocks a mutex.
  *
@@ -208,18 +210,17 @@ void SIMIX_mutex_unlock(smx_mutex_t mutex, smx_process_t issuer)
   XBT_IN("(%p, %p)",mutex,issuer);
   smx_process_t p;              /*process to wake up */
 
-  /* If the mutex is not owned by the issuer do nothing */
-  if (issuer != mutex->owner){
-	  XBT_OUT();
-	  return;
-  }
+  /* If the mutex is not owned by the issuer, that's not good */
+  if (issuer != mutex->owner)
+	  THROWF(mismatch_error, 0, "Cannot release that mutex: it was locked by %s (pid:%d), not by you.",
+			  SIMIX_process_get_name(mutex->owner),SIMIX_process_get_PID(mutex->owner));
 
   if (xbt_swag_size(mutex->sleeping) > 0) {
     p = xbt_swag_extract(mutex->sleeping);
-    SIMIX_synchro_destroy(p->waiting_action);
-    p->waiting_action = NULL;
+    SIMIX_synchro_destroy(p->waiting_synchro);
+    p->waiting_synchro = NULL;
     mutex->owner = p;
-    SIMIX_request_answer(&p->request);
+    SIMIX_simcall_answer(&p->simcall);
   } else {
     /* nobody to wake up */
     mutex->locked = 0;
@@ -253,7 +254,7 @@ void SIMIX_mutex_destroy(smx_mutex_t mutex)
  * It have to be called before the use of the condition.
  * \return A condition
  */
-smx_cond_t SIMIX_cond_init()
+smx_cond_t SIMIX_cond_init(void)
 {
   XBT_IN("()");
   s_smx_process_t p;
@@ -265,42 +266,38 @@ smx_cond_t SIMIX_cond_init()
 }
 
 /**
- * \brief Handle condition waiting requests without timeouts
- * \param The request
+ * \brief Handle a condition waiting simcall without timeouts
+ * \param simcall the simcall
  */
-void SIMIX_pre_cond_wait(smx_req_t req)
+void simcall_HANDLER_cond_wait(smx_simcall_t simcall, smx_cond_t cond, smx_mutex_t mutex)
 {
-  XBT_IN("(%p)",req);
-  smx_process_t issuer = req->issuer;
-  smx_cond_t cond = req->cond_wait.cond;
-  smx_mutex_t mutex = req->cond_wait.mutex;
+  XBT_IN("(%p)",simcall);
+  smx_process_t issuer = simcall->issuer;
 
-  _SIMIX_cond_wait(cond, mutex, -1, issuer, req);
+  _SIMIX_cond_wait(cond, mutex, -1, issuer, simcall);
   XBT_OUT();
 }
 
 /**
- * \brief Handle condition waiting requests with timeouts
- * \param The request
+ * \brief Handle a condition waiting simcall with timeouts
+ * \param simcall the simcall
  */
-void SIMIX_pre_cond_wait_timeout(smx_req_t req)
+void simcall_HANDLER_cond_wait_timeout(smx_simcall_t simcall, smx_cond_t cond,
+		                 smx_mutex_t mutex, double timeout)
 {
-  XBT_IN("(%p)",req);
-  smx_process_t issuer = req->issuer;
-  smx_cond_t cond = req->cond_wait_timeout.cond;
-  smx_mutex_t mutex = req->cond_wait_timeout.mutex;
-  double timeout = req->cond_wait_timeout.timeout;
+  XBT_IN("(%p)",simcall);
+  smx_process_t issuer = simcall->issuer;
 
-  _SIMIX_cond_wait(cond, mutex, timeout, issuer, req);
+  _SIMIX_cond_wait(cond, mutex, timeout, issuer, simcall);
   XBT_OUT();
 }
 
 
 static void _SIMIX_cond_wait(smx_cond_t cond, smx_mutex_t mutex, double timeout,
-                             smx_process_t issuer, smx_req_t req)
+                             smx_process_t issuer, smx_simcall_t simcall)
 {
-  XBT_IN("(%p, %p, %f, %p,%p)",cond,mutex,timeout,issuer,req);
-  smx_action_t sync_act = NULL;
+  XBT_IN("(%p, %p, %f, %p,%p)",cond,mutex,timeout,issuer,simcall);
+  smx_synchro_t synchro = NULL;
 
   XBT_DEBUG("Wait condition %p", cond);
 
@@ -311,10 +308,10 @@ static void _SIMIX_cond_wait(smx_cond_t cond, smx_mutex_t mutex, double timeout,
     SIMIX_mutex_unlock(mutex, issuer);
   }
 
-  sync_act = SIMIX_synchro_wait(issuer->smx_host, timeout);
-  xbt_fifo_unshift(sync_act->request_list, req);
-  issuer->waiting_action = sync_act;
-  xbt_swag_insert(req->issuer, cond->sleeping);   
+  synchro = SIMIX_synchro_wait(issuer->host, timeout);
+  xbt_fifo_unshift(synchro->simcalls, simcall);
+  issuer->waiting_synchro = synchro;
+  xbt_swag_insert(simcall->issuer, cond->sleeping);   
   XBT_OUT();
 }
 
@@ -330,7 +327,7 @@ void SIMIX_cond_signal(smx_cond_t cond)
   XBT_IN("(%p)",cond);
   smx_process_t proc = NULL;
   smx_mutex_t mutex = NULL;
-  smx_req_t req = NULL;
+  smx_simcall_t simcall = NULL;
 
   XBT_DEBUG("Signal condition %p", cond);
 
@@ -338,21 +335,19 @@ void SIMIX_cond_signal(smx_cond_t cond)
      to make it acquire the mutex */
   if ((proc = xbt_swag_extract(cond->sleeping))) {
 
-    /* Destroy waiter's synchro action */
-    SIMIX_synchro_destroy(proc->waiting_action);
-    proc->waiting_action = NULL;
+    /* Destroy waiter's synchronization */
+    SIMIX_synchro_destroy(proc->waiting_synchro);
+    proc->waiting_synchro = NULL;
 
-    /* Now transform the cond wait request into a mutex lock one */
-    req = &proc->request;
-    if(req->call == REQ_COND_WAIT)
-      mutex = req->cond_wait.mutex;
+    /* Now transform the cond wait simcall into a mutex lock one */
+    simcall = &proc->simcall;
+    if(simcall->call == SIMCALL_COND_WAIT)
+      mutex = simcall_cond_wait__get__mutex(simcall);
     else
-      mutex = req->cond_wait_timeout.mutex;
-
-    req->call = REQ_MUTEX_LOCK;
-    req->mutex_lock.mutex = mutex;
+      mutex = simcall_cond_wait_timeout__get__mutex(simcall);
+    simcall->call = SIMCALL_MUTEX_LOCK;
 
-    SIMIX_pre_mutex_lock(req);
+    simcall_HANDLER_mutex_lock(simcall, mutex);
   }
   XBT_OUT();
 }
@@ -377,7 +372,7 @@ void SIMIX_cond_broadcast(smx_cond_t cond)
 }
 
 /**
- * \brief Destroys a contidion.
+ * \brief Destroys a condition.
  *
  * Destroys and frees the condition's memory. 
  * \param cond A condition
@@ -402,7 +397,7 @@ void SIMIX_cond_destroy(smx_cond_t cond)
 /** @brief Initialize a semaphore */
 smx_sem_t SIMIX_sem_init(unsigned int value)
 {
-  XBT_IN("(%d)",value);
+  XBT_IN("(%u)",value);
   s_smx_process_t p;
 
   smx_sem_t sem = xbt_new0(s_smx_sem_t, 1);
@@ -426,6 +421,9 @@ void SIMIX_sem_destroy(smx_sem_t sem)
   XBT_OUT();
 }
 
+void simcall_HANDLER_sem_release(smx_simcall_t simcall, smx_sem_t sem){
+  SIMIX_sem_release(sem);
+}
 /** @brief release the semaphore
  *
  * Unlock a process waiting on the semaphore.
@@ -438,10 +436,9 @@ void SIMIX_sem_release(smx_sem_t sem)
 
   XBT_DEBUG("Sem release semaphore %p", sem);
   if ((proc = xbt_swag_extract(sem->sleeping))) {
-    proc = xbt_swag_extract(sem->sleeping);
-    SIMIX_synchro_destroy(proc->waiting_action);
-    proc->waiting_action = NULL;
-    SIMIX_request_answer(&proc->request);
+    SIMIX_synchro_destroy(proc->waiting_synchro);
+    proc->waiting_synchro = NULL;
+    SIMIX_simcall_answer(&proc->simcall);
   } else if (sem->value < SMX_SEM_NOLIMIT) {
     sem->value++;
   }
@@ -449,13 +446,16 @@ void SIMIX_sem_release(smx_sem_t sem)
 }
 
 /** @brief Returns true if acquiring this semaphore would block */
-XBT_INLINE int SIMIX_sem_would_block(smx_sem_t sem)
+int SIMIX_sem_would_block(smx_sem_t sem)
 {
   XBT_IN("(%p)",sem);
   XBT_OUT();
   return (sem->value <= 0);
 }
 
+int simcall_HANDLER_sem_get_capacity(smx_simcall_t simcall, smx_sem_t sem){
+  return SIMIX_sem_get_capacity(sem);
+}
 /** @brief Returns the current capacity of the semaphore */
 int SIMIX_sem_get_capacity(smx_sem_t sem)
 {
@@ -465,41 +465,45 @@ int SIMIX_sem_get_capacity(smx_sem_t sem)
 }
 
 static void _SIMIX_sem_wait(smx_sem_t sem, double timeout, smx_process_t issuer,
-                            smx_req_t req)
+                            smx_simcall_t simcall)
 {
-  XBT_IN("(%p, %f, %p, %p)",sem,timeout,issuer,req);
-  smx_action_t sync_act = NULL;
+  XBT_IN("(%p, %f, %p, %p)",sem,timeout,issuer,simcall);
+  smx_synchro_t synchro = NULL;
 
   XBT_DEBUG("Wait semaphore %p (timeout:%f)", sem, timeout);
   if (sem->value <= 0) {
-    sync_act = SIMIX_synchro_wait(issuer->smx_host, timeout);
-    xbt_fifo_unshift(sync_act->request_list, req);
-    issuer->waiting_action = sync_act;
+    synchro = SIMIX_synchro_wait(issuer->host, timeout);
+    xbt_fifo_unshift(synchro->simcalls, simcall);
+    issuer->waiting_synchro = synchro;
     xbt_swag_insert(issuer, sem->sleeping);
   } else {
     sem->value--;
-    SIMIX_request_answer(req);
+    SIMIX_simcall_answer(simcall);
   }
   XBT_OUT();
 }
 
 /**
- * \brief Handle sem acquire requests without timeouts
+ * \brief Handles a sem acquire simcall without timeout.
+ * \param simcall the simcall
  */
-void SIMIX_pre_sem_acquire(smx_req_t req)
+void simcall_HANDLER_sem_acquire(smx_simcall_t simcall, smx_sem_t sem)
 {
-  XBT_IN("(%p)",req);
-  _SIMIX_sem_wait(req->sem_acquire.sem, -1, req->issuer, req);
+  XBT_IN("(%p)",simcall);
+  _SIMIX_sem_wait(sem, -1, simcall->issuer, simcall);
   XBT_OUT();
 }
 
 /**
- * \brief Handle sem acquire requests with timeouts
+ * \brief Handles a sem acquire simcall with timeout.
+ * \param simcall the simcall
  */
-void SIMIX_pre_sem_acquire_timeout(smx_req_t req)
+void simcall_HANDLER_sem_acquire_timeout(smx_simcall_t simcall, smx_sem_t sem, double timeout)
 {
-  XBT_IN("(%p)",req);
-  _SIMIX_sem_wait(req->sem_acquire_timeout.sem,
-                  req->sem_acquire_timeout.timeout, req->issuer, req);  
+  XBT_IN("(%p)",simcall);
+  _SIMIX_sem_wait(sem, timeout, simcall->issuer, simcall);  
   XBT_OUT();
 }
+int simcall_HANDLER_sem_would_block(smx_simcall_t simcall, smx_sem_t sem) {
+  return SIMIX_sem_would_block(sem);
+}