-#include "mailbox.h"\r
-#include "msg/private.h"\r
-\r
-XBT_LOG_NEW_DEFAULT_SUBCATEGORY(msg_mailbox, msg,\r
- "Logging specific to MSG (mailbox)");\r
-\r
-static xbt_dict_t \r
-msg_mailboxes = NULL;\r
-\r
-void\r
-MSG_mailbox_mod_init(void)\r
-{\r
- msg_mailboxes = xbt_dict_new(); \r
-}\r
-\r
-void\r
-MSG_mailbox_mod_exit(void)\r
-{\r
- xbt_dict_free(&msg_mailboxes);\r
-}\r
-\r
-msg_mailbox_t\r
-MSG_mailbox_create(const char *alias)\r
-{\r
- msg_mailbox_t mailbox = xbt_new0(s_msg_mailbox_t,1);\r
- \r
- mailbox->tasks = xbt_fifo_new();\r
- mailbox->cond = NULL;\r
- mailbox->alias = alias ? xbt_strdup(alias) : NULL;\r
- mailbox->hostname = NULL;\r
- \r
- return mailbox;\r
-}\r
-\r
-msg_mailbox_t\r
-MSG_mailbox_new(const char *alias)\r
-{\r
- msg_mailbox_t mailbox = MSG_mailbox_create(alias);\r
- \r
- /* add the mbox in the dictionary */\r
- xbt_dict_set(msg_mailboxes, alias, mailbox, MSG_mailbox_free);\r
- \r
- return mailbox;\r
-}\r
-\r
-void\r
-MSG_mailbox_free(void* mailbox)\r
-{\r
- msg_mailbox_t _mailbox = (msg_mailbox_t)mailbox;\r
-\r
- if(NULL != (_mailbox->hostname))\r
- free(_mailbox->hostname);\r
-\r
- free(_mailbox->alias);\r
- \r
- free(_mailbox);\r
-}\r
-\r
-void\r
-MSG_mailbox_put(msg_mailbox_t mailbox, m_task_t task)\r
-{\r
- xbt_fifo_push(mailbox->tasks, task);\r
-}\r
-\r
-smx_cond_t\r
-MSG_mailbox_get_cond(msg_mailbox_t mailbox)\r
-{\r
- return mailbox->cond;\r
-}\r
-\r
-void\r
-MSG_mailbox_remove(msg_mailbox_t mailbox, m_task_t task)\r
-{\r
- xbt_fifo_remove(mailbox->tasks,task);\r
-}\r
-\r
-int\r
-MSG_mailbox_is_empty(msg_mailbox_t mailbox)\r
-{\r
- return (NULL == xbt_fifo_get_first_item(mailbox->tasks));\r
-}\r
-\r
-m_task_t\r
-MSG_mailbox_pop_head(msg_mailbox_t mailbox)\r
-{\r
- return (m_task_t)xbt_fifo_shift(mailbox->tasks);\r
-}\r
-\r
-m_task_t\r
-MSG_mailbox_get_head(msg_mailbox_t mailbox)\r
-{\r
- xbt_fifo_item_t item;\r
- \r
- if(NULL == (item = xbt_fifo_get_first_item(mailbox->tasks)))\r
- return NULL;\r
- \r
- return (m_task_t)xbt_fifo_get_item_content(item);\r
-}\r
-\r
-\r
-m_task_t\r
-MSG_mailbox_get_first_host_task(msg_mailbox_t mailbox, m_host_t host)\r
-{\r
- m_task_t task = NULL;\r
- xbt_fifo_item_t item = NULL;\r
-\r
- xbt_fifo_foreach(mailbox->tasks, item, task, m_task_t)\r
- if (task->simdata->source == host) {\r
- xbt_fifo_remove_item(mailbox->tasks, item);\r
- return task;\r
- }\r
-\r
- return NULL;\r
-}\r
-\r
-int\r
-MSG_mailbox_get_count_host_waiting_tasks(msg_mailbox_t mailbox, m_host_t host)\r
-{\r
- m_task_t task = NULL;\r
- xbt_fifo_item_t item = NULL;\r
- int count = 0;\r
- \r
- xbt_fifo_foreach(mailbox->tasks, item, task, m_task_t) \r
- {\r
- if (task->simdata->source == host)\r
- count++;\r
- }\r
- \r
- return count;\r
-}\r
-\r
-void\r
-MSG_mailbox_set_cond(msg_mailbox_t mailbox, smx_cond_t cond)\r
-{\r
- mailbox->cond = cond;\r
-}\r
-\r
-const char*\r
-MSG_mailbox_get_alias(msg_mailbox_t mailbox)\r
-{\r
- return mailbox->alias;\r
-}\r
-\r
-const char*\r
-MSG_mailbox_get_hostname(msg_mailbox_t mailbox)\r
-{\r
- return mailbox->hostname;\r
-}\r
-\r
-void\r
-MSG_mailbox_set_hostname(msg_mailbox_t mailbox, const char* hostname)\r
-{\r
- mailbox->hostname = xbt_strdup(hostname);\r
-}\r
-\r
-msg_mailbox_t\r
-MSG_mailbox_get_by_alias(const char* alias)\r
-{\r
-\r
- msg_mailbox_t mailbox = xbt_dict_get_or_null(msg_mailboxes,alias);\r
- \r
- if(!mailbox)\r
- {\r
- mailbox = MSG_mailbox_new(alias);\r
- MSG_mailbox_set_hostname(mailbox,MSG_host_self()->name);\r
- }\r
- \r
- return mailbox; \r
-}\r
-\r
-msg_mailbox_t\r
-MSG_mailbox_get_by_channel(m_host_t host, m_channel_t channel)\r
-{\r
- xbt_assert0((host != NULL), "Invalid host");\r
- xbt_assert1((channel >= 0)&& (channel < msg_global->max_channel), "Invalid channel %d",channel);\r
-\r
- return host->simdata->mailboxes[(size_t)channel];\r
-}\r
-\r
-MSG_error_t \r
-MSG_mailbox_get_task_ext(msg_mailbox_t mailbox, m_task_t* task, m_host_t host, double timeout)\r
-{\r
- m_process_t process = MSG_process_self();\r
- m_task_t t = NULL;\r
- m_host_t h = NULL;\r
- simdata_task_t t_simdata = NULL;\r
- simdata_host_t h_simdata = NULL;\r
- int first_time = 1;\r
- \r
- smx_cond_t cond = NULL; //conditional wait if the task isn't on the channel yet\r
- \r
- CHECK_HOST();\r
- \r
- /* Sanity check */\r
- xbt_assert0(task, "Null pointer for the task storage");\r
- \r
- if (*task)\r
- CRITICAL0("MSG_task_get() was asked to write in a non empty task struct.");\r
- \r
- /* Get the task */\r
- h = MSG_host_self();\r
- h_simdata = h->simdata;\r
- \r
- SIMIX_mutex_lock(h->simdata->mutex);\r
- \r
- while (1) \r
- {\r
- /* if the mailbox is empty (has no task */\r
- if(!MSG_mailbox_is_empty(mailbox))\r
- {\r
- if(!host) \r
- {\r
- /* pop the head of the mailbox */\r
- t = MSG_mailbox_pop_head(mailbox);\r
- break;\r
- } \r
- else \r
- {\r
- /* get the first task of the host */\r
- if(NULL != (t = MSG_mailbox_get_first_host_task(mailbox,host)))\r
- break;\r
- }\r
- }\r
- \r
- if(timeout > 0) \r
- {\r
- if (!first_time) \r
- {\r
- SIMIX_mutex_unlock(h->simdata->mutex);\r
- /* set the simix condition of the mailbox to NULL */\r
- MSG_mailbox_set_cond(mailbox, NULL);\r
- SIMIX_cond_destroy(cond);\r
- MSG_RETURN(MSG_TRANSFER_FAILURE);\r
- }\r
- }\r
- \r
- xbt_assert1(!MSG_mailbox_get_cond(mailbox),"A process is already blocked on the channel %s", MSG_mailbox_get_alias(mailbox));\r
- \r
- cond = SIMIX_cond_init();\r
- \r
- /* set the condition of the mailbox */\r
- MSG_mailbox_set_cond(mailbox, cond);\r
- \r
- if (timeout > 0)\r
- SIMIX_cond_wait_timeout(cond, h->simdata->mutex, timeout);\r
- else \r
- SIMIX_cond_wait(MSG_mailbox_get_cond(mailbox), h->simdata->mutex);\r
- \r
- \r
- if (SIMIX_host_get_state(h_simdata->smx_host) == 0)\r
- MSG_RETURN(MSG_HOST_FAILURE);\r
- \r
- first_time = 0;\r
- }\r
- \r
- SIMIX_mutex_unlock(h->simdata->mutex);\r
- \r
- DEBUG1("OK, got a task (%s)", t->name);\r
- /* clean conditional */\r
- if (cond) \r
- {\r
- SIMIX_cond_destroy(cond);\r
- \r
- MSG_mailbox_set_cond(mailbox,NULL);\r
- }\r
- \r
- t_simdata = t->simdata;\r
- t_simdata->receiver = process;\r
- *task = t;\r
- \r
- SIMIX_mutex_lock(t_simdata->mutex);\r
- \r
- /* Transfer */\r
- /* create SIMIX action to the communication */\r
- t_simdata->comm = SIMIX_action_communicate(\r
- t_simdata->sender->simdata->m_host->simdata->smx_host,\r
- process->simdata->m_host->simdata->smx_host,\r
- t->name, \r
- t_simdata->message_size,\r
- t_simdata->rate\r
- );\r
- \r
- /* if the process is suspend, create the action but stop its execution, it will be restart when the sender process resume */\r
- if (MSG_process_is_suspended(t_simdata->sender)) \r
- {\r
- DEBUG1("Process sender (%s) suspended", t_simdata->sender->name);\r
- SIMIX_action_set_priority(t_simdata->comm, 0);\r
- }\r
- \r
- process->simdata->waiting_task = t;\r
- SIMIX_register_action_to_condition(t_simdata->comm, t_simdata->cond);\r
- \r
- while (1) \r
- {\r
- SIMIX_cond_wait(t_simdata->cond, t_simdata->mutex);\r
- \r
- if (SIMIX_action_get_state(t_simdata->comm) != SURF_ACTION_RUNNING)\r
- break;\r
- }\r
- \r
- SIMIX_unregister_action_to_condition(t_simdata->comm, t_simdata->cond);\r
- process->simdata->waiting_task = NULL;\r
- \r
- /* the task has already finished and the pointer must be null */\r
- if (t->simdata->sender) \r
- {\r
- t->simdata->sender->simdata->waiting_task = NULL;\r
- }\r
- \r
- /* for this process, don't need to change in get function */\r
- t->simdata->receiver = NULL;\r
- SIMIX_mutex_unlock(t_simdata->mutex);\r
- \r
- \r
- if (SIMIX_action_get_state(t_simdata->comm) == SURF_ACTION_DONE) \r
- {\r
- SIMIX_action_destroy(t_simdata->comm);\r
- t_simdata->comm = NULL;\r
- t_simdata->using--;\r
- MSG_RETURN(MSG_OK);\r
- } \r
- else if (SIMIX_host_get_state(h_simdata->smx_host) == 0) \r
- {\r
- SIMIX_action_destroy(t_simdata->comm);\r
- t_simdata->comm = NULL;\r
- t_simdata->using--;\r
- MSG_RETURN(MSG_HOST_FAILURE);\r
- } \r
- else \r
- {\r
- SIMIX_action_destroy(t_simdata->comm);\r
- t_simdata->comm = NULL;\r
- t_simdata->using--;\r
- MSG_RETURN(MSG_TRANSFER_FAILURE);\r
- }\r
-}\r
-\r
-MSG_error_t \r
-MSG_mailbox_put_with_timeout(msg_mailbox_t mailbox, m_task_t task, double timeout)\r
-{\r
- m_process_t process = MSG_process_self();\r
- const char* hostname;\r
- simdata_task_t task_simdata = NULL;\r
- m_host_t local_host = NULL;\r
- m_host_t remote_host = NULL;\r
- smx_cond_t cond = NULL;\r
-\r
- CHECK_HOST();\r
- \r
- task_simdata = task->simdata;\r
- task_simdata->sender = process;\r
- task_simdata->source = MSG_process_get_host(process);\r
- \r
- xbt_assert0(task_simdata->using == 1,"This task is still being used somewhere else. You cannot send it now. Go fix your code!");\r
- \r
- task_simdata->comm = NULL;\r
- \r
- task_simdata->using++;\r
- local_host = ((simdata_process_t) process->simdata)->m_host;\r
- \r
- /* get the host name containing the mailbox */\r
- hostname = MSG_mailbox_get_hostname(mailbox);\r
-\r
- remote_host = MSG_get_host_by_name(hostname);\r
-\r
- if(NULL == remote_host)\r
- THROW1(not_found_error,0,"Host %s not fount", hostname);\r
-\r
-\r
- DEBUG4("Trying to send a task (%g kB) from %s to %s on the channel aliased by the alias %s",task->simdata->message_size / 1000, local_host->name,remote_host->name, MSG_mailbox_get_alias(mailbox));\r
- \r
- SIMIX_mutex_lock(remote_host->simdata->mutex);\r
-\r
- /* put the task in the mailbox */\r
- MSG_mailbox_put(mailbox,task);\r
- \r
- if(NULL != (cond = MSG_mailbox_get_cond(mailbox)))\r
- {\r
- DEBUG0("Somebody is listening. Let's wake him up!");\r
- SIMIX_cond_signal(cond);\r
- }\r
-\r
- \r
- \r
- SIMIX_mutex_unlock(remote_host->simdata->mutex);\r
- \r
- SIMIX_mutex_lock(task->simdata->mutex);\r
-\r
- process->simdata->waiting_task = task;\r
- \r
- if(timeout > 0) \r
- {\r
- xbt_ex_t e;\r
- double time;\r
- double time_elapsed;\r
- time = SIMIX_get_clock();\r
- \r
- TRY \r
- {\r
- /*verify if the action that ends is the correct. Call the wait_timeout with the new time. If the timeout occurs, an exception is raised */\r
- while (1) \r
- {\r
- time_elapsed = SIMIX_get_clock() - time;\r
- SIMIX_cond_wait_timeout(task->simdata->cond, task->simdata->mutex,timeout - time_elapsed);\r
- \r
- if ((task->simdata->comm != NULL) && (SIMIX_action_get_state(task->simdata->comm) != SURF_ACTION_RUNNING))\r
- break;\r
- }\r
- } \r
- CATCH(e) \r
- {\r
- if(e.category==timeout_error) \r
- {\r
- xbt_ex_free(e);\r
- /* verify if the timeout happened and the communication didn't started yet */\r
- if (task->simdata->comm == NULL) \r
- {\r
- process->simdata->waiting_task = NULL;\r
- \r
- /* remove the task from the mailbox */\r
- MSG_mailbox_remove(mailbox,task);\r
- \r
- if (task->simdata->receiver) \r
- {\r
- task->simdata->receiver->simdata->waiting_task = NULL;\r
- }\r
- \r
- task->simdata->sender = NULL;\r
- \r
- SIMIX_mutex_unlock(task->simdata->mutex);\r
- MSG_RETURN(MSG_TRANSFER_FAILURE);\r
- }\r
- } \r
- else \r
- {\r
- RETHROW;\r
- }\r
- }\r
- } \r
- else \r
- {\r
- while (1) \r
- {\r
- SIMIX_cond_wait(task->simdata->cond, task->simdata->mutex);\r
- \r
- if (SIMIX_action_get_state(task->simdata->comm) != SURF_ACTION_RUNNING)\r
- break;\r
- }\r
- }\r
- \r
- DEBUG1("Action terminated %s", task->name);\r
- process->simdata->waiting_task = NULL;\r
- \r
- /* the task has already finished and the pointer must be null */\r
- if (task->simdata->receiver) \r
- {\r
- task->simdata->receiver->simdata->waiting_task = NULL;\r
- }\r
- \r
- task->simdata->sender = NULL;\r
- SIMIX_mutex_unlock(task->simdata->mutex);\r
-\r
- \r
- if (SIMIX_action_get_state(task->simdata->comm) == SURF_ACTION_DONE)\r
- {\r
- MSG_RETURN(MSG_OK);\r
- } \r
- else if (SIMIX_host_get_state(local_host->simdata->smx_host) == 0) \r
- {\r
- MSG_RETURN(MSG_HOST_FAILURE);\r
- } \r
- else \r
- {\r
- MSG_RETURN(MSG_TRANSFER_FAILURE);\r
- }\r
-}\r
+#include "mailbox.h"
+#include "msg/private.h"
+
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(msg_mailbox, msg,
+ "Logging specific to MSG (mailbox)");
+
+static xbt_dict_t msg_mailboxes = NULL;
+
+void MSG_mailbox_mod_init(void)
+{
+ msg_mailboxes = xbt_dict_new();
+}
+
+void MSG_mailbox_mod_exit(void)
+{
+ xbt_dict_free(&msg_mailboxes);
+}
+
+msg_mailbox_t MSG_mailbox_create(const char *alias)
+{
+ msg_mailbox_t mailbox = xbt_new0(s_msg_mailbox_t, 1);
+
+ mailbox->tasks = xbt_fifo_new();
+ mailbox->cond = NULL;
+ mailbox->alias = alias ? xbt_strdup(alias) : NULL;
+ mailbox->hostname = NULL;
+
+ return mailbox;
+}
+
+msg_mailbox_t MSG_mailbox_new(const char *alias)
+{
+ msg_mailbox_t mailbox = MSG_mailbox_create(alias);
+
+ /* add the mbox in the dictionary */
+ xbt_dict_set(msg_mailboxes, alias, mailbox, MSG_mailbox_free);
+
+ return mailbox;
+}
+
+void MSG_mailbox_free(void *mailbox)
+{
+ msg_mailbox_t _mailbox = (msg_mailbox_t) mailbox;
+
+ if (_mailbox->hostname)
+ free(_mailbox->hostname);
+
+ xbt_fifo_free(_mailbox->tasks);
+ free(_mailbox->alias);
+
+ free(_mailbox);
+}
+
+smx_cond_t MSG_mailbox_get_cond(msg_mailbox_t mailbox)
+{
+ return mailbox->cond;
+}
+
+void MSG_mailbox_remove(msg_mailbox_t mailbox, m_task_t task)
+{
+ xbt_fifo_remove(mailbox->tasks, task);
+}
+
+int MSG_mailbox_is_empty(msg_mailbox_t mailbox)
+{
+ return (NULL == xbt_fifo_get_first_item(mailbox->tasks));
+}
+
+m_task_t MSG_mailbox_pop_head(msg_mailbox_t mailbox)
+{
+ return (m_task_t) xbt_fifo_shift(mailbox->tasks);
+}
+
+m_task_t MSG_mailbox_get_head(msg_mailbox_t mailbox)
+{
+ xbt_fifo_item_t item;
+
+ if (!(item = xbt_fifo_get_first_item(mailbox->tasks)))
+ return NULL;
+
+ return (m_task_t) xbt_fifo_get_item_content(item);
+}
+
+
+m_task_t MSG_mailbox_get_first_host_task(msg_mailbox_t mailbox, m_host_t host)
+{
+ m_task_t task = NULL;
+ xbt_fifo_item_t item = NULL;
+
+ xbt_fifo_foreach(mailbox->tasks, item, task, m_task_t)
+ if (task->simdata->source == host) {
+ xbt_fifo_remove_item(mailbox->tasks, item);
+ return task;
+ }
+
+ return NULL;
+}
+
+int
+MSG_mailbox_get_count_host_waiting_tasks(msg_mailbox_t mailbox, m_host_t host)
+{
+ m_task_t task = NULL;
+ xbt_fifo_item_t item = NULL;
+ int count = 0;
+
+ xbt_fifo_foreach(mailbox->tasks, item, task, m_task_t) {
+ if (task->simdata->source == host)
+ count++;
+ }
+
+ return count;
+}
+
+void MSG_mailbox_set_cond(msg_mailbox_t mailbox, smx_cond_t cond)
+{
+ mailbox->cond = cond;
+}
+
+const char *MSG_mailbox_get_alias(msg_mailbox_t mailbox)
+{
+ return mailbox->alias;
+}
+
+const char *MSG_mailbox_get_hostname(msg_mailbox_t mailbox)
+{
+ return mailbox->hostname;
+}
+
+void MSG_mailbox_set_hostname(msg_mailbox_t mailbox, const char *hostname)
+{
+ mailbox->hostname = xbt_strdup(hostname);
+}
+
+msg_mailbox_t MSG_mailbox_get_by_alias(const char *alias)
+{
+
+ msg_mailbox_t mailbox = xbt_dict_get_or_null(msg_mailboxes, alias);
+
+ if (!mailbox) {
+ mailbox = MSG_mailbox_new(alias);
+ MSG_mailbox_set_hostname(mailbox, MSG_host_self()->name);
+ }
+
+ return mailbox;
+}
+
+msg_mailbox_t MSG_mailbox_get_by_channel(m_host_t host, m_channel_t channel)
+{
+ xbt_assert0((host != NULL), "Invalid host");
+ xbt_assert1((channel >= 0)
+ && (channel < msg_global->max_channel), "Invalid channel %d",
+ channel);
+
+ return host->simdata->mailboxes[(size_t) channel];
+}
+
+MSG_error_t
+MSG_mailbox_get_task_ext(msg_mailbox_t mailbox, m_task_t * task,
+ m_host_t host, double timeout)
+{
+ m_process_t process = MSG_process_self();
+ m_task_t t = NULL;
+ m_host_t h = NULL;
+ simdata_task_t t_simdata = NULL;
+ simdata_host_t h_simdata = NULL;
+ double start_time = SIMIX_get_clock();
+
+ smx_cond_t cond = NULL; //conditional wait if the task isn't on the channel yet
+
+ CHECK_HOST();
+
+ /* Sanity check */
+ xbt_assert0(task, "Null pointer for the task storage");
+
+ if (*task)
+ CRITICAL0
+ ("MSG_task_get() was asked to write in a non empty task struct.");
+
+ /* Get the task */
+ h = MSG_host_self();
+ h_simdata = h->simdata;
+
+ SIMIX_mutex_lock(h->simdata->mutex);
+
+ if (MSG_mailbox_get_cond(mailbox)) {
+ CRITICAL1("A process is already blocked on the channel %s",
+ MSG_mailbox_get_alias(mailbox));
+ SIMIX_cond_display_info(MSG_mailbox_get_cond(mailbox));
+ xbt_die("Go fix your code!");
+ }
+
+ while (1) {
+ /* if the mailbox is empty (has no task */
+ if (!MSG_mailbox_is_empty(mailbox)) {
+ if (!host) {
+ /* pop the head of the mailbox */
+ t = MSG_mailbox_pop_head(mailbox);
+ break;
+ } else {
+ /* get the first task of the host */
+ if ((t = MSG_mailbox_get_first_host_task(mailbox, host)))
+ break;
+ }
+ }
+
+ if ((timeout > 0) && (SIMIX_get_clock() - start_time >= timeout)) {
+ SIMIX_mutex_unlock(h->simdata->mutex);
+ MSG_mailbox_set_cond(mailbox, NULL);
+ SIMIX_cond_destroy(cond);
+ MSG_RETURN(MSG_TRANSFER_FAILURE);
+ }
+
+ if (!cond) {
+ cond = SIMIX_cond_init();
+ MSG_mailbox_set_cond(mailbox, cond);
+ }
+
+ if (timeout > 0)
+ SIMIX_cond_wait_timeout(cond, h->simdata->mutex, timeout - start_time);
+ else
+ SIMIX_cond_wait(MSG_mailbox_get_cond(mailbox), h->simdata->mutex);
+
+ if (SIMIX_host_get_state(h_simdata->smx_host) == 0) {
+ SIMIX_mutex_unlock(h->simdata->mutex);
+ MSG_mailbox_set_cond(mailbox, NULL);
+ SIMIX_cond_destroy(cond);
+ MSG_RETURN(MSG_HOST_FAILURE);
+ }
+ }
+
+
+ DEBUG1("OK, got a task (%s)", t->name);
+ /* clean conditional */
+ if (cond) {
+ MSG_mailbox_set_cond(mailbox, NULL);
+ SIMIX_cond_destroy(cond);
+ }
+
+ SIMIX_mutex_unlock(h->simdata->mutex);
+
+ t_simdata = t->simdata;
+ t_simdata->receiver = process;
+ *task = t;
+
+ SIMIX_mutex_lock(t_simdata->mutex);
+
+ /* Transfer */
+ /* create SIMIX action to the communication */
+ t_simdata->comm =
+ SIMIX_action_communicate(t_simdata->sender->simdata->m_host->simdata->
+ smx_host,
+ process->simdata->m_host->simdata->smx_host,
+ t->name, t_simdata->message_size,
+ t_simdata->rate);
+
+ /* This is a hack. We know that both the receiver and the sender will
+ need to look at the content of t_simdata->comm. And it needs to be
+ destroyed. However, we don't known whether the receiver or the sender
+ will get to it first. So by setting with refcount to 2 we can enforce
+ that things happen correctly. An alternative would be to only do ++ and
+ -- on this refcount and to sprinkle them judiciously throughout the code,
+ which appears perhaps worse? Or perhaps the refcount field of
+ task->simdata can be used for this? At any rate, this will do for now */
+ t_simdata->comm->refcount = 2;
+
+ /* if the process is suspend, create the action but stop its execution, it will be restart when the sender process resume */
+ if (MSG_process_is_suspended(t_simdata->sender)) {
+ DEBUG1("Process sender (%s) suspended", t_simdata->sender->name);
+ SIMIX_action_set_priority(t_simdata->comm, 0);
+ }
+
+ process->simdata->waiting_task = t;
+ SIMIX_register_action_to_condition(t_simdata->comm, t_simdata->cond);
+
+ while (1) {
+ SIMIX_cond_wait(t_simdata->cond, t_simdata->mutex);
+
+ if (SIMIX_action_get_state(t_simdata->comm) != SURF_ACTION_RUNNING)
+ break;
+ if (!SIMIX_host_get_state(h_simdata->smx_host))
+ break;
+ if (!SIMIX_host_get_state(process->simdata->m_host->simdata->smx_host))
+ break;
+ }
+
+ SIMIX_unregister_action_to_condition(t_simdata->comm, t_simdata->cond);
+ process->simdata->waiting_task = NULL;
+
+ /* If sender still around (it didn't free the comm yet), note that it's not waiting anymore */
+ if (t_simdata->comm->refcount == 2) {
+ t->simdata->sender->simdata->waiting_task = NULL;
+ }
+
+ /* for this process, don't need to change in get function */
+ SIMIX_mutex_unlock(t_simdata->mutex);
+
+
+ if (SIMIX_action_get_state(t_simdata->comm) == SURF_ACTION_DONE) {
+ if (t_simdata->comm->refcount == 1) {
+ SIMIX_action_destroy(t_simdata->comm);
+ t_simdata->comm = NULL;
+ } else {
+ t_simdata->comm->refcount--;
+ }
+ t_simdata->refcount--;
+ MSG_RETURN(MSG_OK);
+ } else if (SIMIX_host_get_state(h_simdata->smx_host) == 0) {
+ if (t_simdata->comm->refcount == 1) {
+ SIMIX_action_destroy(t_simdata->comm);
+ t_simdata->comm = NULL;
+ } else {
+ t_simdata->comm->refcount--;
+ }
+ t_simdata->refcount--;
+ MSG_RETURN(MSG_HOST_FAILURE);
+ } else {
+ if (t_simdata->comm->refcount == 1) {
+ SIMIX_action_destroy(t_simdata->comm);
+ t_simdata->comm = NULL;
+ } else {
+ t_simdata->comm->refcount--;
+ }
+ t_simdata->refcount--;
+ MSG_RETURN(MSG_TRANSFER_FAILURE);
+ }
+}
+
+MSG_error_t
+MSG_mailbox_put_with_timeout(msg_mailbox_t mailbox, m_task_t task,
+ double timeout)
+{
+ m_process_t process = MSG_process_self();
+ const char *hostname;
+ simdata_task_t t_simdata = NULL;
+ m_host_t local_host = NULL;
+ m_host_t remote_host = NULL;
+ smx_cond_t cond = NULL;
+
+ CHECK_HOST();
+
+ t_simdata = task->simdata;
+ t_simdata->sender = process;
+ t_simdata->source = MSG_process_get_host(process);
+
+ xbt_assert0(t_simdata->refcount == 1,
+ "This task is still being used somewhere else. You cannot send it now. Go fix your code!");
+
+ t_simdata->comm = NULL;
+
+ t_simdata->refcount++;
+ local_host = ((simdata_process_t) process->simdata)->m_host;
+ msg_global->sent_msg++;
+
+ /* get the host name containing the mailbox */
+ hostname = MSG_mailbox_get_hostname(mailbox);
+
+ remote_host = MSG_get_host_by_name(hostname);
+
+ if (!remote_host)
+ THROW1(not_found_error, 0, "Host %s not fount", hostname);
+
+
+ DEBUG4("Trying to send a task (%g kB) from %s to %s on the channel %s",
+ t_simdata->message_size / 1000, local_host->name,
+ remote_host->name, MSG_mailbox_get_alias(mailbox));
+
+ SIMIX_mutex_lock(remote_host->simdata->mutex);
+
+ /* put the task in the mailbox */
+ xbt_fifo_push(mailbox->tasks, task);
+
+ if ((cond = MSG_mailbox_get_cond(mailbox))) {
+ DEBUG0("Somebody is listening. Let's wake him up!");
+ SIMIX_cond_signal(cond);
+ }
+
+ SIMIX_mutex_unlock(remote_host->simdata->mutex);
+
+ SIMIX_mutex_lock(t_simdata->mutex);
+
+ process->simdata->waiting_task = task;
+
+ if (timeout > 0) {
+ xbt_ex_t e;
+ double time;
+ double time_elapsed;
+ time = SIMIX_get_clock();
+
+ TRY {
+ /*verify if the action that ends is the correct. Call the wait_timeout with the new time. If the timeout occurs, an exception is raised */
+ while (1) {
+ time_elapsed = SIMIX_get_clock() - time;
+ SIMIX_cond_wait_timeout(t_simdata->cond, t_simdata->mutex,
+ timeout - time_elapsed);
+
+ if ((t_simdata->comm != NULL)
+ && (SIMIX_action_get_state(t_simdata->comm) !=
+ SURF_ACTION_RUNNING))
+ break;
+ if (!SIMIX_host_get_state(local_host->simdata->smx_host))
+ break;
+ if (!SIMIX_host_get_state(remote_host->simdata->smx_host))
+ break;
+ }
+ }
+ CATCH(e) {
+ if (e.category == timeout_error) {
+ xbt_ex_free(e);
+ /* verify if the timeout happened and the communication didn't started yet */
+ if (t_simdata->comm == NULL) {
+ process->simdata->waiting_task = NULL;
+
+ /* remove the task from the mailbox */
+ MSG_mailbox_remove(mailbox, task);
+
+ if (t_simdata->receiver && t_simdata->receiver->simdata) { /* receiver still around */
+ t_simdata->receiver->simdata->waiting_task = NULL;
+ }
+
+ SIMIX_mutex_unlock(t_simdata->mutex);
+ MSG_RETURN(MSG_TRANSFER_FAILURE);
+ }
+ } else {
+ RETHROW;
+ }
+ }
+ } else {
+ while (1) {
+ SIMIX_cond_wait(t_simdata->cond, t_simdata->mutex);
+
+ if (SIMIX_action_get_state(t_simdata->comm) != SURF_ACTION_RUNNING)
+ break;
+ if (!SIMIX_host_get_state(local_host->simdata->smx_host))
+ break;
+ if (!SIMIX_host_get_state(remote_host->simdata->smx_host))
+ break;
+ }
+ }
+
+ DEBUG1("Action terminated %s", task->name);
+ process->simdata->waiting_task = NULL;
+
+ if (t_simdata->comm->refcount == 2) { //receiver didn't free it yet: he's still around
+ t_simdata->receiver->simdata->waiting_task = NULL;
+ }
+
+ SIMIX_mutex_unlock(task->simdata->mutex);
+
+ if (SIMIX_action_get_state(t_simdata->comm) == SURF_ACTION_DONE) {
+ if (t_simdata->comm->refcount == 1) {
+ SIMIX_action_destroy(t_simdata->comm);
+ t_simdata->comm = NULL;
+ } else {
+ t_simdata->comm->refcount--;
+ }
+ MSG_RETURN(MSG_OK);
+ } else if (SIMIX_host_get_state(local_host->simdata->smx_host) == 0) {
+ if (t_simdata->comm->refcount == 1) {
+ SIMIX_action_destroy(t_simdata->comm);
+ t_simdata->comm = NULL;
+ } else {
+ t_simdata->comm->refcount--;
+ }
+ MSG_RETURN(MSG_HOST_FAILURE);
+ } else {
+ if (t_simdata->comm->refcount == 1) {
+ SIMIX_action_destroy(t_simdata->comm);
+ t_simdata->comm = NULL;
+ } else {
+ t_simdata->comm->refcount--;
+ }
+ MSG_RETURN(MSG_TRANSFER_FAILURE);
+ }
+}
