* by an agent for handling some task.
*/
-/** \ingroup msg_gos_functions
- * \brief Listen on a channel and wait for receiving a task.
- *
- * It takes two parameters.
- * \param task a memory location for storing a #m_task_t. It will
- hold a task when this function will return. Thus \a task should not
- be equal to \c NULL and \a *task should be equal to \c NULL. If one of
- those two condition does not hold, there will be a warning message.
- * \param channel the channel on which the agent should be
- listening. This value has to be >=0 and < than the maximal
- number of channels fixed with MSG_set_channel_number().
- * \return #MSG_FATAL if \a task is equal to \c NULL, #MSG_WARNING
- * if \a *task is not equal to \c NULL, and #MSG_OK otherwise.
- */
-MSG_error_t MSG_task_get(m_task_t * task,
- m_channel_t channel)
-{
- return MSG_task_get_with_time_out(task, channel, -1);
-}
-
-/** \ingroup msg_gos_functions
- * \brief Listen on a channel and wait for receiving a task with a timeout.
- *
- * It takes three parameters.
- * \param task a memory location for storing a #m_task_t. It will
- hold a task when this function will return. Thus \a task should not
- be equal to \c NULL and \a *task should be equal to \c NULL. If one of
- those two condition does not hold, there will be a warning message.
- * \param channel the channel on which the agent should be
- listening. This value has to be >=0 and < than the maximal
- number of channels fixed with MSG_set_channel_number().
- * \param max_duration the maximum time to wait for a task before giving
- up. In such a case, \a task will not be modified and will still be
- equal to \c NULL when returning.
- * \return #MSG_FATAL if \a task is equal to \c NULL, #MSG_WARNING
- if \a *task is not equal to \c NULL, and #MSG_OK otherwise.
- */
-
-MSG_error_t MSG_task_get_with_time_out(m_task_t * task,
- m_channel_t channel,
- double max_duration)
+static MSG_error_t __MSG_task_get_with_time_out_from_host(m_task_t * task,
+ m_channel_t channel,
+ double max_duration,
+ m_host_t host)
{
m_process_t process = MSG_process_self();
m_task_t t = NULL;
simdata_host_t h_simdata = NULL;
int first_time = 1;
e_surf_action_state_t state = SURF_ACTION_NOT_IN_THE_SYSTEM;
-
+ xbt_fifo_item_t item = NULL;
+
CHECK_HOST();
xbt_assert1((channel>=0) && (channel < msg_global->max_channel),"Invalid channel %d",channel);
/* Sanity check */
DEBUG2("Waiting for a task on channel %d (%s)", channel,h->name);
- while ((t = xbt_fifo_shift(h_simdata->mbox[channel])) == NULL) {
+ while (1) {
+ if(xbt_fifo_size(h_simdata->mbox[channel])>0) {
+ if(!host) {
+ t = xbt_fifo_shift(h_simdata->mbox[channel]);
+ break;
+ } else {
+ xbt_fifo_foreach(h->simdata->mbox[channel],item,t,m_task_t) {
+ if(t->simdata->source==host) break;
+ }
+ if(item) {
+ xbt_fifo_remove_item(h->simdata->mbox[channel],item);
+ break;
+ }
+ }
+ }
+
if(max_duration>0) {
if(!first_time) {
MSG_RETURN(MSG_OK);
/* OK, we should both be ready now. Are you there ? */
}
+ DEBUG1("OK, got a task (%s)", t->name);
+
t_simdata = t->simdata;
/* *task = __MSG_task_copy(t); */
*task=t;
/* Transfer */
t_simdata->using++;
+ while(MSG_process_is_suspended(t_simdata->sender)) {
+ DEBUG1("Oooups, the sender (%s) has been suspended in the meantime. Let's wait for him",
+ t_simdata->sender->name);
+ m_task_t task_to_wait_for = t_simdata->sender->simdata->waiting_task;
+ if(__MSG_process_isBlocked(t_simdata->sender)) {
+ DEBUG0("He's blocked. Let's wait for him to go in the suspended state");
+ __MSG_process_unblock(t_simdata->sender);
+ task_to_wait_for->simdata->using++;
+ __MSG_task_wait_event(process, task_to_wait_for);
+ MSG_task_destroy(task_to_wait_for);
+ } else {
+ DEBUG0("He's suspended. Let's wait for him to go in the resumed state");
+ task_to_wait_for->simdata->using++;
+ __MSG_task_wait_event(process, task_to_wait_for);
+ MSG_task_destroy(task_to_wait_for);
+ DEBUG0("He's resumed. He should block again. So let's free him.");
+ __MSG_process_unblock(t_simdata->sender);
+ break;
+ }
+ }
+ DEBUG0("Calling SURF for communication creation");
t_simdata->comm = surf_workstation_resource->extension_public->
communicate(MSG_process_get_host(t_simdata->sender)->simdata->host,
h->simdata->host, t_simdata->message_size,t_simdata->rate);
surf_workstation_resource->common_public->action_set_data(t_simdata->comm,t);
- if(__MSG_process_isBlocked(t_simdata->sender))
+ if(__MSG_process_isBlocked(t_simdata->sender)) {
+ DEBUG1("Unblocking %s",t_simdata->sender->name);
__MSG_process_unblock(t_simdata->sender);
+ }
PAJE_PROCESS_PUSH_STATE(process,"C");
do {
+ DEBUG0("Waiting for action termination");
__MSG_task_wait_event(process, t);
state=surf_workstation_resource->common_public->action_get_state(t_simdata->comm);
} while (state==SURF_ACTION_RUNNING);
+ DEBUG0("Action terminated");
if(t->simdata->using>1) {
xbt_fifo_unshift(msg_global->process_to_run,process);
}
}
+/** \ingroup msg_gos_functions
+ * \brief Listen on a channel and wait for receiving a task.
+ *
+ * It takes two parameters.
+ * \param task a memory location for storing a #m_task_t. It will
+ hold a task when this function will return. Thus \a task should not
+ be equal to \c NULL and \a *task should be equal to \c NULL. If one of
+ those two condition does not hold, there will be a warning message.
+ * \param channel the channel on which the agent should be
+ listening. This value has to be >=0 and < than the maximal
+ number of channels fixed with MSG_set_channel_number().
+ * \return #MSG_FATAL if \a task is equal to \c NULL, #MSG_WARNING
+ * if \a *task is not equal to \c NULL, and #MSG_OK otherwise.
+ */
+MSG_error_t MSG_task_get(m_task_t * task,
+ m_channel_t channel)
+{
+ return MSG_task_get_with_time_out(task, channel, -1);
+}
+
+/** \ingroup msg_gos_functions
+ * \brief Listen on a channel and wait for receiving a task with a timeout.
+ *
+ * It takes three parameters.
+ * \param task a memory location for storing a #m_task_t. It will
+ hold a task when this function will return. Thus \a task should not
+ be equal to \c NULL and \a *task should be equal to \c NULL. If one of
+ those two condition does not hold, there will be a warning message.
+ * \param channel the channel on which the agent should be
+ listening. This value has to be >=0 and < than the maximal
+ number of channels fixed with MSG_set_channel_number().
+ * \param max_duration the maximum time to wait for a task before giving
+ up. In such a case, \a task will not be modified and will still be
+ equal to \c NULL when returning.
+ * \return #MSG_FATAL if \a task is equal to \c NULL, #MSG_WARNING
+ if \a *task is not equal to \c NULL, and #MSG_OK otherwise.
+ */
+MSG_error_t MSG_task_get_with_time_out(m_task_t * task,
+ m_channel_t channel,
+ double max_duration)
+{
+ return __MSG_task_get_with_time_out_from_host(task, channel, max_duration, NULL);
+}
+
+/** \ingroup msg_gos_functions
+ * \brief Listen on \a channel and waits for receiving a task from \a host.
+ *
+ * It takes three parameters.
+ * \param task a memory location for storing a #m_task_t. It will
+ hold a task when this function will return. Thus \a task should not
+ be equal to \c NULL and \a *task should be equal to \c NULL. If one of
+ those two condition does not hold, there will be a warning message.
+ * \param channel the channel on which the agent should be
+ listening. This value has to be >=0 and < than the maximal
+ number of channels fixed with MSG_set_channel_number().
+ * \param host the host that is to be watched.
+ * \return #MSG_FATAL if \a task is equal to \c NULL, #MSG_WARNING
+ if \a *task is not equal to \c NULL, and #MSG_OK otherwise.
+ */
+MSG_error_t MSG_task_get_from_host(m_task_t * task, int channel,
+ m_host_t host)
+{
+ return __MSG_task_get_with_time_out_from_host(task, channel, -1, host);
+}
+
/** \ingroup msg_gos_functions
* \brief Test whether there is a pending communication on a channel.
*
return MSG_process_get_PID(t->simdata->sender);
}
+/** \ingroup msg_gos_functions
+ * \brief Wait for at most \a max_duration second for a task reception
+ on \a channel. *\a PID is updated with the PID of the first process
+ that triggered this event if any.
+ *
+ * It takes three parameters:
+ * \param channel the channel on which the agent should be
+ listening. This value has to be >=0 and < than the maximal.
+ number of channels fixed with MSG_set_channel_number().
+ * \param PID a memory location for storing an int.
+ * \param max_duration the maximum time to wait for a task before
+ giving up. In the case of a reception, *\a PID will be updated
+ with the PID of the first process to send a task.
+ * \return #MSG_HOST_FAILURE if the host is shut down in the meantime
+ and #MSG_OK otherwise.
+ */
MSG_error_t MSG_channel_select_from(m_channel_t channel, double max_duration,
int *PID)
{
}
if(max_duration==0.0) {
- return MSG_task_probe_from(channel);
+ *PID = MSG_task_probe_from(channel);
+ MSG_RETURN(MSG_OK);
} else {
CHECK_HOST();
h = MSG_host_self();
MSG_RETURN(MSG_OK);
}
}
+
+
+/** \ingroup msg_gos_functions
+
+ * \brief Return the number of tasks waiting to be received on a \a
+ channel and sent by \a host.
+ *
+ * It takes two parameters.
+ * \param channel the channel on which the agent should be
+ listening. This value has to be >=0 and < than the maximal
+ number of channels fixed with MSG_set_channel_number().
+ * \param host the host that is to be watched.
+ * \return the number of tasks waiting to be received on \a channel
+ and sent by \a host.
+ */
+int MSG_task_probe_from_host(int channel, m_host_t host)
+{
+ simdata_host_t h_simdata = NULL;
+ xbt_fifo_item_t item;
+ m_task_t t;
+ int count = 0;
+ m_host_t h = NULL;
+
+ xbt_assert1((channel>=0) && (channel < msg_global->max_channel),"Invalid channel %d",channel);
+ CHECK_HOST();
+ h = MSG_host_self();
+ h_simdata = h->simdata;
+
+ DEBUG2("Probing on channel %d (%s)", channel,h->name);
+
+ xbt_fifo_foreach(h->simdata->mbox[channel],item,t,m_task_t) {
+ if(t->simdata->source==host) count++;
+ }
+
+ return count;
+}
+
/** \ingroup msg_gos_functions
* \brief Put a task on a channel of an host and waits for the end of the
* transmission.
PAJE_COMM_START(process,task,channel);
- if(remote_host->simdata->sleeping[channel])
+ if(remote_host->simdata->sleeping[channel]) {
+ DEBUG0("Somebody is listening. Let's wake him up!");
__MSG_process_unblock(remote_host->simdata->sleeping[channel]);
+ }
process->simdata->put_host = dest;
process->simdata->put_channel = channel;
- while(!(task_simdata->comm))
+ while(!(task_simdata->comm)) {
+ DEBUG0("Communication not initiated yet. Let's block!");
__MSG_process_block(-1);
+ }
+ DEBUG0("Registering to this communication");
surf_workstation_resource->common_public->action_use(task_simdata->comm);
process->simdata->put_host = NULL;
process->simdata->put_channel = -1;
state=surf_workstation_resource->common_public->action_get_state(task_simdata->comm);
while (state==SURF_ACTION_RUNNING) {
+ DEBUG0("Waiting for action termination");
__MSG_task_wait_event(process, task);
state=surf_workstation_resource->common_public->action_get_state(task_simdata->comm);
}
-
+ DEBUG0("Action terminated");
+ task->simdata->rate=-1.0; /* Sets the rate back to default */
PAJE_PROCESS_POP_STATE(process);
MSG_error_t res = MSG_OK;
task->simdata->rate=max_rate;
res = MSG_task_put(task, dest, channel);
- task->simdata->rate=-1.0;
return(res);
}
e_surf_action_state_t state = SURF_ACTION_NOT_IN_THE_SYSTEM;
simdata_task_t simdata = task->simdata;
+ XBT_IN4("(%p(%s) %p(%s))",process,process->name,task,task->name);
simdata->using++;
do {
__MSG_task_wait_event(process, task);
if(surf_workstation_resource->common_public->action_free(simdata->compute))
simdata->compute = NULL;
simdata->computation_amount = 0.0;
+ XBT_OUT;
MSG_RETURN(MSG_OK);
} else if(surf_workstation_resource->extension_public->
get_state(MSG_process_get_host(process)->simdata->host)
== SURF_CPU_OFF) {
if(surf_workstation_resource->common_public->action_free(simdata->compute))
simdata->compute = NULL;
+ XBT_OUT;
MSG_RETURN(MSG_HOST_FAILURE);
} else {
if(surf_workstation_resource->common_public->action_free(simdata->compute))
simdata->compute = NULL;
+ XBT_OUT;
MSG_RETURN(MSG_TASK_CANCELLED);
}
}
* \param name a name for the object. It is for user-level information
and can be NULL.
* \param host_nb the number of hosts implied in the parallel task.
- * \param host_list an array of #host_nb m_host_t.
- * \param computation_amount an array of #host_nb
+ * \param host_list an array of \p host_nb m_host_t.
+ * \param computation_amount an array of \p host_nb
doubles. computation_amount[i] is the total number of operations
that have to be performed on host_list[i].
- * \param communication_amount an array of #host_nb*#host_nb doubles.
+ * \param communication_amount an array of \p host_nb* \p host_nb doubles.
* \param data a pointer to any data may want to attach to the new
object. It is for user-level information and can be NULL. It can
be retrieved with the function \ref MSG_task_get_data.
}
/** \ingroup msg_gos_functions
- * \brief Return the number of MSG tasks currently running on a
+ * \brief Return the number of MSG tasks currently running on
* the host of the current running process.
*/
static int MSG_get_msgload(void)
/** \ingroup msg_gos_functions
*
- * \brief Return the the last value returned by a MSG function (except
+ * \brief Return the last value returned by a MSG function (except
* MSG_get_errno...).
*/
MSG_error_t MSG_get_errno(void)
