/* 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 "msg/private.h"
-#include "simix/private.h"
+#include "private.h"
#include "xbt/sysdep.h"
#include "mc/mc.h"
#include "xbt/log.h"
{
simdata_task_t simdata = NULL;
m_process_t self = MSG_process_self();
- e_surf_action_state_t state = SURF_ACTION_NOT_IN_THE_SYSTEM;
+ e_smx_state_t comp_state;
CHECK_HOST();
simdata = task->simdata;
TRACE_msg_task_execute_start(task);
#endif
- xbt_assert1((!simdata->compute) && (task->simdata->refcount == 1),
+ xbt_assert1((!simdata->compute) && (task->simdata->isused == 0),
"This task is executed somewhere else. Go fix your code! %d",
- task->simdata->refcount);
+ task->simdata->isused);
DEBUG1("Computing on %s", MSG_process_self()->simdata->m_host->name);
#endif
return MSG_OK;
}
- simdata->refcount++;
- SIMIX_mutex_lock(simdata->mutex);
+ simdata->isused=1;
simdata->compute =
- SIMIX_action_execute(SIMIX_host_self(), task->name,
- simdata->computation_amount);
- SIMIX_action_set_priority(simdata->compute, simdata->priority);
+ SIMIX_req_host_execute(task->name, SIMIX_host_self(),
+ simdata->computation_amount,
+ simdata->priority);
+#ifdef HAVE_TRACING
+ SIMIX_req_set_category(simdata->compute, task->category);
+#endif
- /* changed to waiting action since we are always waiting one action (execute, communicate or sleep) */
self->simdata->waiting_action = simdata->compute;
- SIMIX_register_action_to_condition(simdata->compute, simdata->cond);
- do {
- SIMIX_cond_wait(simdata->cond, simdata->mutex);
- state = SIMIX_action_get_state(simdata->compute);
- } while (state == SURF_ACTION_READY || state == SURF_ACTION_RUNNING);
- SIMIX_unregister_action_to_condition(simdata->compute, simdata->cond);
+ comp_state = SIMIX_req_host_execution_wait(simdata->compute);
self->simdata->waiting_action = NULL;
- SIMIX_mutex_unlock(simdata->mutex);
- simdata->refcount--;
+ simdata->isused=0;
- if (SIMIX_action_get_state(task->simdata->compute) == SURF_ACTION_DONE) {
+ DEBUG2("Execution task '%s' finished in state %d", task->name, comp_state);
+ if (comp_state == SIMIX_DONE) {
/* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */
- SIMIX_action_destroy(task->simdata->compute);
simdata->computation_amount = 0.0;
simdata->comm = NULL;
simdata->compute = NULL;
TRACE_msg_task_execute_end(task);
#endif
MSG_RETURN(MSG_OK);
- } else if (SIMIX_host_get_state(SIMIX_host_self()) == 0) {
+ } else if (SIMIX_req_host_get_state(SIMIX_host_self()) == 0) {
/* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */
- SIMIX_action_destroy(task->simdata->compute);
simdata->comm = NULL;
simdata->compute = NULL;
#ifdef HAVE_TRACING
MSG_RETURN(MSG_HOST_FAILURE);
} else {
/* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */
- SIMIX_action_destroy(task->simdata->compute);
simdata->comm = NULL;
simdata->compute = NULL;
#ifdef HAVE_TRACING
/* Simulator Data */
simdata->computation_amount = 0;
simdata->message_size = 0;
- simdata->cond = SIMIX_cond_init();
- simdata->mutex = SIMIX_mutex_init();
simdata->compute = NULL;
simdata->comm = NULL;
simdata->rate = -1.0;
- simdata->refcount = 1;
+ simdata->isused = 0;
simdata->sender = NULL;
simdata->receiver = NULL;
simdata->source = NULL;
MSG_error_t MSG_parallel_task_execute(m_task_t task)
{
simdata_task_t simdata = NULL;
+ e_smx_state_t comp_state;
m_process_t self = MSG_process_self();
- e_surf_action_state_t state = SURF_ACTION_NOT_IN_THE_SYSTEM;
CHECK_HOST();
simdata = task->simdata;
xbt_assert0((!simdata->compute)
- && (task->simdata->refcount == 1),
+ && (task->simdata->isused == 0),
"This task is executed somewhere else. Go fix your code!");
xbt_assert0(simdata->host_nb,
"This is not a parallel task. Go to hell.");
- DEBUG1("Computing on %s", MSG_process_self()->simdata->m_host->name);
+ DEBUG1("Parallel computing on %s", MSG_process_self()->simdata->m_host->name);
- simdata->refcount++;
+ simdata->isused=1;
- SIMIX_mutex_lock(simdata->mutex);
simdata->compute =
- SIMIX_action_parallel_execute(task->name, simdata->host_nb,
- simdata->host_list,
- simdata->comp_amount,
- simdata->comm_amount, 1.0, -1.0);
+ SIMIX_req_host_parallel_execute(task->name, simdata->host_nb,
+ simdata->host_list,
+ simdata->comp_amount,
+ simdata->comm_amount, 1.0, -1.0);
+ DEBUG1("Parallel execution action created: %p", simdata->compute);
self->simdata->waiting_action = simdata->compute;
- SIMIX_register_action_to_condition(simdata->compute, simdata->cond);
- do {
- SIMIX_cond_wait(simdata->cond, simdata->mutex);
- state = SIMIX_action_get_state(task->simdata->compute);
- } while (state == SURF_ACTION_READY || state == SURF_ACTION_RUNNING);
-
- SIMIX_unregister_action_to_condition(simdata->compute, simdata->cond);
+ comp_state = SIMIX_req_host_execution_wait(simdata->compute);
self->simdata->waiting_action = NULL;
+ DEBUG2("Finished waiting for execution of action %p, state = %d", simdata->compute, comp_state);
- SIMIX_mutex_unlock(simdata->mutex);
- simdata->refcount--;
+ simdata->isused=0;
- if (SIMIX_action_get_state(task->simdata->compute) == SURF_ACTION_DONE) {
+ if (comp_state == SIMIX_DONE) {
/* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */
- SIMIX_action_destroy(task->simdata->compute);
simdata->computation_amount = 0.0;
simdata->comm = NULL;
simdata->compute = NULL;
MSG_RETURN(MSG_OK);
- } else if (SIMIX_host_get_state(SIMIX_host_self()) == 0) {
+ } else if (SIMIX_req_host_get_state(SIMIX_host_self()) == 0) {
/* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */
- SIMIX_action_destroy(task->simdata->compute);
simdata->comm = NULL;
simdata->compute = NULL;
MSG_RETURN(MSG_HOST_FAILURE);
} else {
/* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */
- SIMIX_action_destroy(task->simdata->compute);
simdata->comm = NULL;
simdata->compute = NULL;
MSG_RETURN(MSG_TASK_CANCELLED);
}
-
}
*/
MSG_error_t MSG_process_sleep(double nb_sec)
{
- smx_action_t act_sleep;
- m_process_t proc = MSG_process_self();
- e_surf_action_state_t state = SURF_ACTION_NOT_IN_THE_SYSTEM;
- smx_mutex_t mutex;
- smx_cond_t cond;
+ e_smx_state_t state;
+ /*m_process_t proc = MSG_process_self();*/
#ifdef HAVE_TRACING
TRACE_msg_process_sleep_in(MSG_process_self());
#endif
/* create action to sleep */
- act_sleep =
- SIMIX_action_sleep(SIMIX_process_get_host(proc->simdata->s_process),
- nb_sec);
-
- mutex = SIMIX_mutex_init();
- SIMIX_mutex_lock(mutex);
-
- /* create conditional and register action to it */
- cond = SIMIX_cond_init();
-
- proc->simdata->waiting_action = act_sleep;
- SIMIX_register_action_to_condition(act_sleep, cond);
- do {
- SIMIX_cond_wait(cond, mutex);
- state = SIMIX_action_get_state(act_sleep);
- } while (state == SURF_ACTION_READY || state == SURF_ACTION_RUNNING);
- proc->simdata->waiting_action = NULL;
- SIMIX_unregister_action_to_condition(act_sleep, cond);
- SIMIX_mutex_unlock(mutex);
-
- /* remove variables */
- SIMIX_cond_destroy(cond);
- SIMIX_mutex_destroy(mutex);
-
- if (SIMIX_action_get_state(act_sleep) == SURF_ACTION_DONE) {
- if (SIMIX_host_get_state(SIMIX_host_self()) == SURF_RESOURCE_OFF) {
- SIMIX_action_destroy(act_sleep);
+ state = SIMIX_req_process_sleep(nb_sec);
+
+ /*proc->simdata->waiting_action = act_sleep;
+
+ FIXME: check if not setting the waiting_action breaks something on msg
+
+ proc->simdata->waiting_action = NULL;*/
+
+ if (state == SIMIX_DONE) {
#ifdef HAVE_TRACING
- TRACE_msg_process_sleep_out(MSG_process_self());
+ TRACE_msg_process_sleep_out(MSG_process_self());
#endif
- MSG_RETURN(MSG_HOST_FAILURE);
- }
+ MSG_RETURN(MSG_OK);
} else {
- SIMIX_action_destroy(act_sleep);
#ifdef HAVE_TRACING
TRACE_msg_process_sleep_out(MSG_process_self());
#endif
MSG_RETURN(MSG_HOST_FAILURE);
}
-
- SIMIX_action_destroy(act_sleep);
-#ifdef HAVE_TRACING
- TRACE_msg_process_sleep_out(MSG_process_self());
-#endif
- MSG_RETURN(MSG_OK);
}
/** \ingroup msg_gos_functions
}
/** \ingroup msg_gos_functions
- * \brief Send a task on a channel.
+ * \brief Sends a task on a mailbox.
+ *
+ * This is a non blocking function: use MSG_comm_wait() or MSG_comm_test()
+ * to end the communication.
*
- * This function takes two parameter.
* \param task a #m_task_t to send on another location.
- * \param alias the channel on which the agent should put this
- task. This value has to be >=0 and < than the maximal number of
- channels fixed with MSG_set_channel_number().
- * \return the msg_comm_t communication.
+ * \param alias name of the mailbox to sent the task to
+ * \return the msg_comm_t communication created
*/
msg_comm_t MSG_task_isend(m_task_t task, const char *alias)
{
CHECK_HOST();
- /* FIXME: these functions are not tracable */
+ /* FIXME: these functions are not traceable */
/* Prepare the task to send */
t_simdata = task->simdata;
t_simdata->sender = process;
t_simdata->source = MSG_host_self();
- xbt_assert0(t_simdata->refcount == 1,
+ xbt_assert0(t_simdata->isused == 0,
"This task is still being used somewhere else. You cannot send it now. Go fix your code!");
- t_simdata->refcount++;
+ t_simdata->isused = 1;
msg_global->sent_msg++;
- process->simdata->waiting_task = task;
/* Send it by calling SIMIX network layer */
+ msg_comm_t comm = xbt_new0(s_msg_comm_t, 1);
+ comm->task_sent = task;
+ comm->task_received = NULL;
+ comm->status = MSG_OK;
+ comm->s_comm =
+ SIMIX_req_comm_isend(mailbox, t_simdata->message_size,
+ t_simdata->rate, task, sizeof(void *), NULL, NULL, 0);
+ t_simdata->comm = comm->s_comm; /* FIXME: is the field t_simdata->comm still useful? */
- /* Kept for semantical compatibility with older implementation */
- if (mailbox->cond)
- SIMIX_cond_signal(mailbox->cond);
-
- return SIMIX_network_isend(mailbox->rdv, t_simdata->message_size,
- t_simdata->rate, task, sizeof(void *),
- &t_simdata->comm);
+ return comm;
}
/** \ingroup msg_gos_functions
- * \brief Listen on a channel for receiving a task from an asynchronous communication.
+ * \brief Sends a task on a mailbox.
*
- * It takes two parameters.
- * \param task a memory location for storing a #m_task_t.
- * \param alias 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 the msg_comm_t communication.
+ * This is a non blocking detached send function.
+ * Think of it as a best effort send. The communication
+ * object will be destroyed by the receiver (if any).
+ *
+ * \param task a #m_task_t to send on another location.
+ * \param alias name of the mailbox to sent the task to
*/
-msg_comm_t MSG_task_irecv(m_task_t * task, const char *alias)
+void MSG_task_dsend(m_task_t task, const char *alias, void_f_pvoid_t cleanup)
{
- smx_comm_t comm;
- smx_rdv_t rdv = MSG_mailbox_get_by_alias(alias)->rdv;
+ simdata_task_t t_simdata = NULL;
+ m_process_t process = MSG_process_self();
msg_mailbox_t mailbox = MSG_mailbox_get_by_alias(alias);
CHECK_HOST();
- /* FIXME: these functions are not tracable */
+ /* FIXME: these functions are not traceable */
+
+ /* Prepare the task to send */
+ t_simdata = task->simdata;
+ t_simdata->sender = process;
+ t_simdata->source = MSG_host_self();
- memset(&comm, 0, sizeof(comm));
+ xbt_assert0(t_simdata->isused == 0,
+ "This task is still being used somewhere else. You cannot send it now. Go fix your code!");
- /* Kept for compatibility with older implementation */
- xbt_assert1(!MSG_mailbox_get_cond(mailbox),
- "A process is already blocked on this channel %s",
- MSG_mailbox_get_alias(mailbox));
+ t_simdata->isused = 1;
+ msg_global->sent_msg++;
+
+ /* Send it by calling SIMIX network layer */
+ SIMIX_req_comm_isend(mailbox, t_simdata->message_size,
+ t_simdata->rate, task, sizeof(void *), NULL, cleanup, 1);
+}
+
+/** \ingroup msg_gos_functions
+ * \brief Starts listening for receiving a task from an asynchronous communication.
+ *
+ * This is a non blocking function: use MSG_comm_wait() or MSG_comm_test()
+ * to end the communication.
+ *
+ * \param task a memory location for storing a #m_task_t.
+ * \param name of the mailbox to receive the task on
+ * \return the msg_comm_t communication created
+ */
+msg_comm_t MSG_task_irecv(m_task_t *task, const char *alias)
+{
+ smx_rdv_t rdv = MSG_mailbox_get_by_alias(alias);
+
+ CHECK_HOST();
+
+ /* FIXME: these functions are not tracable */
/* Sanity check */
xbt_assert0(task, "Null pointer for the task storage");
("MSG_task_get() was asked to write in a non empty task struct.");
/* Try to receive it by calling SIMIX network layer */
- return SIMIX_network_irecv(rdv, task, NULL);
+ msg_comm_t comm = xbt_new0(s_msg_comm_t, 1);
+ comm->task_sent = NULL;
+ comm->task_received = task;
+ comm->status = MSG_OK;
+ comm->s_comm = SIMIX_req_comm_irecv(rdv, task, NULL, NULL, NULL);
+
+ return comm;
}
/** \ingroup msg_gos_functions
- * \brief Test the status of a communication.
- *
- * It takes one parameter.
- * \param comm the communication to test.
- * \return the status of the communication:
- * TRUE : the communication is completed
- * FALSE: the communication is incompleted
+ * \brief Checks whether a communication is done, and if yes, finalizes it.
+ * \param comm the communication to test
+ * \return TRUE if the communication is finished
+ * (but it may have failed, use MSG_comm_get_status() to know its status)
+ * or FALSE if the communication is not finished yet
* If the status is FALSE, don't forget to use MSG_process_sleep() after the test.
*/
int MSG_comm_test(msg_comm_t comm)
{
- return SIMIX_network_test(comm);
+ xbt_ex_t e;
+ int finished = 0;
+ TRY {
+ finished = SIMIX_req_comm_test(comm->s_comm);
+ }
+ CATCH(e) {
+ switch (e.category) {
+
+ case host_error:
+ comm->status = MSG_HOST_FAILURE;
+ finished = 1;
+ break;
+
+ case network_error:
+ comm->status = MSG_TRANSFER_FAILURE;
+ finished = 1;
+ break;
+
+ case timeout_error:
+ comm->status = MSG_TIMEOUT;
+ finished = 1;
+ break;
+
+ default:
+ RETHROW;
+ }
+ xbt_ex_free(e);
+ }
+
+ return finished;
}
/** \ingroup msg_gos_functions
- * \brief After received TRUE to MSG_comm_test(), the communication must be destroyed.
- *
- * It takes one parameter.
+ * \brief This function checks if a communication is finished.
+ * \param comms a vector of communications
+ * \return the position of the finished communication if any
+ * (but it may have failed, use MSG_comm_get_status() to know its status),
+ * or -1 if none is finished
+ */
+int MSG_comm_testany(xbt_dynar_t comms)
+{
+ xbt_ex_t e;
+ int finished_index = -1;
+
+ /* create the equivalent dynar with SIMIX objects */
+ xbt_dynar_t s_comms = xbt_dynar_new(sizeof(smx_action_t), NULL);
+ msg_comm_t comm;
+ unsigned int cursor;
+ xbt_dynar_foreach(comms, cursor, comm) {
+ xbt_dynar_push(s_comms, &comm->s_comm);
+ }
+
+ MSG_error_t status = MSG_OK;
+ TRY {
+ finished_index = SIMIX_req_comm_testany(s_comms);
+ }
+ CATCH(e) {
+ switch (e.category) {
+
+ case host_error:
+ finished_index = e.value;
+ status = MSG_HOST_FAILURE;
+ break;
+
+ case network_error:
+ finished_index = e.value;
+ status = MSG_TRANSFER_FAILURE;
+ break;
+
+ case timeout_error:
+ finished_index = e.value;
+ status = MSG_TIMEOUT;
+ break;
+
+ default:
+ RETHROW;
+ }
+ xbt_ex_free(e);
+ }
+ xbt_dynar_free(&s_comms);
+
+ if (finished_index != -1) {
+ comm = xbt_dynar_get_as(comms, finished_index, msg_comm_t);
+ /* the communication is finished */
+ comm->status = status;
+ }
+
+ return finished_index;
+}
+
+/** \ingroup msg_gos_functions
+ * \brief Destroys a communication.
* \param comm the communication to destroy.
*/
void MSG_comm_destroy(msg_comm_t comm)
{
- if (!(comm->src_proc == SIMIX_process_self())) {
- m_task_t task;
- task = (m_task_t) SIMIX_communication_get_src_buf(comm);
- task->simdata->refcount--;
+ if (comm->task_received != NULL
+ && *comm->task_received != NULL
+ && MSG_comm_get_status(comm) == MSG_OK) {
+ (*comm->task_received)->simdata->isused = 0;
}
- SIMIX_communication_destroy(comm);
+
+ /* FIXME auto-destroy comms from SIMIX to avoid this request */
+ SIMIX_req_comm_destroy(comm->s_comm);
+ free(comm);
}
/** \ingroup msg_gos_functions
MSG_error_t MSG_comm_wait(msg_comm_t comm, double timeout)
{
xbt_ex_t e;
- MSG_error_t res = MSG_OK;
TRY {
- SIMIX_network_wait(comm, timeout);
+ SIMIX_req_comm_wait(comm->s_comm, timeout);
- if (!(comm->src_proc == SIMIX_process_self())) {
- m_task_t task;
- task = (m_task_t) SIMIX_communication_get_src_buf(comm);
- task->simdata->refcount--;
+ if (comm->task_received != NULL) {
+ /* I am the receiver */
+ (*comm->task_received)->simdata->isused = 0;
}
- SIMIX_communication_destroy(comm);
- /* FIXME: these functions are not tracable */
+ /* FIXME: these functions are not traceable */
}
CATCH(e) {
switch (e.category) {
case host_error:
- res = MSG_HOST_FAILURE;
+ comm->status = MSG_HOST_FAILURE;
break;
case network_error:
- res = MSG_TRANSFER_FAILURE;
+ comm->status = MSG_TRANSFER_FAILURE;
break;
case timeout_error:
- res = MSG_TIMEOUT;
+ comm->status = MSG_TIMEOUT;
break;
default:
- xbt_die(bprintf("Unhandled SIMIX network exception: %s", e.msg));
+ RETHROW;
}
xbt_ex_free(e);
}
- return res;
+
+ return comm->status;
}
/** \ingroup msg_gos_functions
* \brief This function is called by a sender and permit to wait for each communication
*
-* It takes three parameters.
* \param comm a vector of communication
* \param nb_elem is the size of the comm vector
-* \param timeout for each call of MSG_comm_wait
+* \param timeout for each call of MSG_comm_wait
*/
void MSG_comm_waitall(msg_comm_t * comm, int nb_elem, double timeout)
{
}
/** \ingroup msg_gos_functions
-* \brief This function wait for the first completed communication
-*
-* It takes on parameter.
-* \param comms a vector of communication
-* \return the position of the completed communication from the xbt_dynar_t.
-*/
+ * \brief This function waits for the first communication finished in a list.
+ * \param comms a vector of communications
+ * \return the position of the first finished communication
+ * (but it may have failed, use MSG_comm_get_status() to know its status)
+ */
int MSG_comm_waitany(xbt_dynar_t comms)
{
- return SIMIX_network_waitany(comms);
+ xbt_ex_t e;
+ int finished_index = -1;
+
+ /* create the equivalent dynar with SIMIX objects */
+ xbt_dynar_t s_comms = xbt_dynar_new(sizeof(smx_action_t), NULL);
+ msg_comm_t comm;
+ unsigned int cursor;
+ xbt_dynar_foreach(comms, cursor, comm) {
+ xbt_dynar_push(s_comms, &comm->s_comm);
+ }
+
+ MSG_error_t status = MSG_OK;
+ TRY {
+ finished_index = SIMIX_req_comm_waitany(s_comms);
+ }
+ CATCH(e) {
+ switch (e.category) {
+
+ case host_error:
+ finished_index = e.value;
+ status = MSG_HOST_FAILURE;
+ break;
+
+ case network_error:
+ finished_index = e.value;
+ status = MSG_TRANSFER_FAILURE;
+ break;
+
+ case timeout_error:
+ finished_index = e.value;
+ status = MSG_TIMEOUT;
+ break;
+
+ default:
+ RETHROW;
+ }
+ xbt_ex_free(e);
+ }
+
+ xbt_assert0(finished_index != -1, "WaitAny returned -1");
+ xbt_dynar_free(&s_comms);
+
+ comm = xbt_dynar_get_as(comms, finished_index, msg_comm_t);
+ /* the communication is finished */
+ comm->status = status;
+
+ return finished_index;
+}
+
+/**
+ * \ingroup msg_gos_functions
+ * \brief Returns the error (if any) that occured during a finished communication.
+ * \param comm a finished communication
+ * \return the status of the communication, or MSG_OK if no error occured
+ * during the communication
+ */
+MSG_error_t MSG_comm_get_status(msg_comm_t comm) {
+
+ return comm->status;
}
m_task_t MSG_comm_get_task(msg_comm_t comm)
{
- xbt_assert0(comm, "Invalid parameters");
- return (m_task_t) SIMIX_communication_get_src_buf(comm);
+ xbt_assert0(comm, "Invalid parameter");
+
+ return comm->task_received ? *comm->task_received : comm->task_sent;
}
/** \ingroup msg_gos_functions
&& (channel < msg_global->max_channel), "Invalid channel %d",
channel);
+ DEBUG1("MSG_task_put_with_timout: Trying to send a task to '%s'", dest->name);
return
MSG_mailbox_put_with_timeout(MSG_mailbox_get_by_channel
(dest, channel), task, timeout);
return MSG_process_get_PID(task->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 timeout 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 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;
-
- xbt_assert1((channel >= 0)
- && (channel < msg_global->max_channel), "Invalid channel %d",
- channel);
-
- if (PID) {
- *PID = -1;
- }
-
- if (timeout == 0.0) {
- *PID = MSG_task_probe_from(channel);
- MSG_RETURN(MSG_OK);
- } else {
- CHECK_HOST();
- h = MSG_host_self();
- h_simdata = h->simdata;
-
- mailbox = MSG_mailbox_get_by_channel(MSG_host_self(), channel);
-
- 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 channel %d",
- channel);
-
- 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_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);
- }
-}
