#include "msg/private.h"
#include "xbt/sysdep.h"
#include "xbt/log.h"
+#include "msg_mailbox.h"
+
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(msg_gos, msg,
"Logging specific to MSG (gos)");
{
return PROCESS_GET_ERRNO();
}
+
+MSG_error_t
+MSG_task_receive_ext(m_task_t* task, const char* alias, double timeout, m_host_t host)
+{
+ 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;
+ int first_time = 1;
+ xbt_fifo_item_t item = NULL;
+
+ smx_cond_t cond = NULL; //conditional wait if the task isn't on the channel yet
+
+ /* get the mailbox from the alias (if the mailbox doesn't exist, create it) */
+ msg_mailbox_t mailbox = MSG_mailbox_get_by_alias(alias);
+
+ 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;
+
+ DEBUG2("Waiting for a task on channel aliased by %s (%s)", alias, h->name);
+
+ SIMIX_mutex_lock(h->simdata->mutex);
+
+ 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(NULL != (t = MSG_mailbox_get_first_host_task(mailbox,host)))
+ break;
+ }
+ }
+
+ if(timeout > 0)
+ {
+ if (!first_time)
+ {
+ SIMIX_mutex_unlock(h->simdata->mutex);
+ /* set the simix condition of the mailbox to NULL */
+ MSG_mailbox_set_cond(mailbox, NULL);
+ SIMIX_cond_destroy(cond);
+ MSG_RETURN(MSG_TRANSFER_FAILURE);
+ }
+ }
+
+ xbt_assert1(!MSG_mailbox_get_cond(mailbox),"A process is already blocked on the channel aliased by %s", alias);
+
+ cond = SIMIX_cond_init();
+
+ /* set the condition of the mailbox */
+ MSG_mailbox_set_cond(mailbox, cond);
+
+ if (timeout > 0)
+ SIMIX_cond_wait_timeout(cond, h->simdata->mutex, timeout);
+ else
+ SIMIX_cond_wait(MSG_mailbox_get_cond(mailbox), h->simdata->mutex);
+
+
+ if (SIMIX_host_get_state(h_simdata->smx_host) == 0)
+ MSG_RETURN(MSG_HOST_FAILURE);
+
+ first_time = 0;
+ }
+
+ SIMIX_mutex_unlock(h->simdata->mutex);
+
+ DEBUG1("OK, got a task (%s)", t->name);
+ /* clean conditional */
+ if (cond)
+ {
+ SIMIX_cond_destroy(cond);
+
+ MSG_mailbox_set_cond(mailbox,NULL);
+ }
+
+ 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
+ );
+
+ /* 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;
+ }
+
+ SIMIX_unregister_action_to_condition(t_simdata->comm, t_simdata->cond);
+ process->simdata->waiting_task = NULL;
+
+ /* the task has already finished and the pointer must be null */
+ if (t->simdata->sender)
+ {
+ t->simdata->sender->simdata->waiting_task = NULL;
+ }
+
+ /* for this process, don't need to change in get function */
+ t->simdata->receiver = NULL;
+ SIMIX_mutex_unlock(t_simdata->mutex);
+
+
+ if (SIMIX_action_get_state(t_simdata->comm) == SURF_ACTION_DONE)
+ {
+ SIMIX_action_destroy(t_simdata->comm);
+ t_simdata->comm = NULL;
+ t_simdata->using--;
+ MSG_RETURN(MSG_OK);
+ }
+ else if (SIMIX_host_get_state(h_simdata->smx_host) == 0)
+ {
+ SIMIX_action_destroy(t_simdata->comm);
+ t_simdata->comm = NULL;
+ t_simdata->using--;
+ MSG_RETURN(MSG_HOST_FAILURE);
+ }
+ else
+ {
+ SIMIX_action_destroy(t_simdata->comm);
+ t_simdata->comm = NULL;
+ t_simdata->using--;
+ MSG_RETURN(MSG_TRANSFER_FAILURE);
+ }
+}
+
+MSG_error_t
+MSG_task_receive_with_time_out(m_task_t * task, const char* alias, double timeout)
+{
+ return MSG_task_receive_ext(task, alias, timeout, NULL);
+}
+
+MSG_error_t
+MSG_task_receive(m_task_t * task, const char* alias)
+{
+ return MSG_task_receive_with_time_out(task, alias, -1);
+}
+
+int
+MSG_task_listen(const char* alias)
+{
+ CHECK_HOST();
+
+ DEBUG2("Probing on channel aliased by %s (%s)", alias, MSG_host_self()->name);
+
+ return !MSG_mailbox_is_empty(MSG_mailbox_get_by_alias(alias));
+}
+
+int
+MSG_task_listen_from_host(const char* alias, m_host_t host)
+{
+
+ return MSG_mailbox_get_count_host_tasks(MSG_mailbox_get_by_alias(alias),host);
+
+}
+
+MSG_error_t
+MSG_alias_select_from(const char* alias, double timeout, int* PID)
+{
+ m_host_t h = NULL;
+ simdata_host_t h_simdata = NULL;
+ m_task_t t;
+ int first_time = 1;
+ smx_cond_t cond;
+ msg_mailbox_t mailbox;
+
+ if (PID)
+ {
+ *PID = -1;
+ }
+
+ if(timeout == 0.0)
+ {
+ *PID = MSG_task_listen_from(alias);
+ MSG_RETURN(MSG_OK);
+ }
+ else
+ {
+ CHECK_HOST();
+ h = MSG_host_self();
+ h_simdata = h->simdata;
+
+ DEBUG2("Probing on alias %s (%s)", alias, h->name);
+
+ mailbox = MSG_mailbox_get_by_alias(alias);
+
+ while(MSG_mailbox_is_empty(mailbox))
+ {
+ if(timeout > 0)
+ {
+ if (!first_time)
+ {
+ MSG_RETURN(MSG_OK);
+ }
+ }
+
+ SIMIX_mutex_lock(h_simdata->mutex);
+
+ xbt_assert1(!MSG_mailbox_get_cond(mailbox),"A process is already blocked on this alias %s",alias);
+
+ cond = SIMIX_cond_init();
+
+ MSG_mailbox_set_cond(mailbox, cond);
+
+ if (timeout > 0)
+ {
+ SIMIX_cond_wait_timeout(cond, h_simdata->mutex, timeout);
+ }
+ else
+ {
+ SIMIX_cond_wait(cond, h_simdata->mutex);
+ }
+
+ SIMIX_cond_destroy(cond);
+ SIMIX_mutex_unlock(h_simdata->mutex);
+
+ if (SIMIX_host_get_state(h_simdata->smx_host) == 0)
+ {
+ MSG_RETURN(MSG_HOST_FAILURE);
+ }
+
+ MSG_mailbox_set_cond(mailbox,NULL);
+ first_time = 0;
+ }
+
+ if(NULL == (t = MSG_mailbox_get_head(mailbox)))
+ MSG_RETURN(MSG_OK);
+
+
+ if (PID)
+ {
+ *PID = MSG_process_get_PID(t->simdata->sender);
+ }
+
+ MSG_RETURN(MSG_OK);
+ }
+}
+
+MSG_error_t
+MSG_task_send_with_timeout(m_task_t task, const char* alias, double timeout)
+{
+ m_process_t process = MSG_process_self();
+ const char* hostname;
+ simdata_task_t task_simdata = NULL;
+ m_host_t local_host = NULL;
+ m_host_t remote_host = NULL;
+ smx_cond_t cond = NULL;
+
+ /* get the mailbox from the alias (if the mailbox doesn't exist, create it) */
+ msg_mailbox_t mailbox = MSG_mailbox_get_by_alias(alias);
+
+ CHECK_HOST();
+
+ task_simdata = task->simdata;
+ task_simdata->sender = process;
+ task_simdata->source = MSG_process_get_host(process);
+
+ xbt_assert0(task_simdata->using == 1,"This task is still being used somewhere else. You cannot send it now. Go fix your code!");
+
+ task_simdata->comm = NULL;
+
+ task_simdata->using++;
+ local_host = ((simdata_process_t) process->simdata)->m_host;
+
+ /* get the host name containing the mailbox */
+ hostname = MSG_mailbox_get_hostname(mailbox);
+
+ remote_host = MSG_get_host_by_name(hostname);
+
+ if(NULL == 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 aliased by the alias %s",task->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 */
+ MSG_mailbox_put(mailbox,task);
+
+ if(NULL != (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(task->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(task->simdata->cond, task->simdata->mutex,timeout - time_elapsed);
+
+ if ((task->simdata->comm != NULL) && (SIMIX_action_get_state(task->simdata->comm) != SURF_ACTION_RUNNING))
+ 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 (task->simdata->comm == NULL)
+ {
+ process->simdata->waiting_task = NULL;
+
+ /* remove the task from the mailbox */
+ MSG_mailbox_remove(mailbox,task);
+
+ if (task->simdata->receiver)
+ {
+ task->simdata->receiver->simdata->waiting_task = NULL;
+ }
+
+ task->simdata->sender = NULL;
+
+ SIMIX_mutex_unlock(task->simdata->mutex);
+ MSG_RETURN(MSG_TRANSFER_FAILURE);
+ }
+ }
+ else
+ {
+ RETHROW;
+ }
+ }
+ }
+ else
+ {
+ while (1)
+ {
+ SIMIX_cond_wait(task->simdata->cond, task->simdata->mutex);
+
+ if (SIMIX_action_get_state(task->simdata->comm) != SURF_ACTION_RUNNING)
+ break;
+ }
+ }
+
+ DEBUG1("Action terminated %s", task->name);
+ process->simdata->waiting_task = NULL;
+
+ /* the task has already finished and the pointer must be null */
+ if (task->simdata->receiver)
+ {
+ task->simdata->receiver->simdata->waiting_task = NULL;
+ }
+
+ task->simdata->sender = NULL;
+ SIMIX_mutex_unlock(task->simdata->mutex);
+
+
+ if (SIMIX_action_get_state(task->simdata->comm) == SURF_ACTION_DONE)
+ {
+ MSG_RETURN(MSG_OK);
+ }
+ else if (SIMIX_host_get_state(local_host->simdata->smx_host) == 0)
+ {
+ MSG_RETURN(MSG_HOST_FAILURE);
+ }
+ else
+ {
+ MSG_RETURN(MSG_TRANSFER_FAILURE);
+ }
+}
+
+MSG_error_t
+MSG_task_send(m_task_t task,const char* alias)
+{
+ return MSG_task_send_with_timeout(task, alias, -1);
+}
+
+
+MSG_error_t
+MSG_task_send_bounded(m_task_t task, const char* alias, double rate)
+{
+ task->simdata->rate = rate;
+ return MSG_task_send(task, alias);
+}
+
+int
+MSG_task_listen_from(const char* alias)
+{
+ m_host_t h = NULL;
+ m_task_t t;
+
+ CHECK_HOST();
+
+ h = MSG_host_self();
+
+ DEBUG2("Probing on alias %s(%s)", alias, h->name);
+
+ if(NULL == (t = MSG_mailbox_get_head(MSG_mailbox_get_by_alias(alias))))
+ return -1;
+
+ return MSG_process_get_PID(t->simdata->sender);
+}
+
