X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/0f5e8daaa6e9f74521068aa75837200bcd182ea6..a1ba88402bfb88a278d2e7c849441a9ed4a26120:/src/msg/gos.c diff --git a/src/msg/gos.c b/src/msg/gos.c index 24e98d7f7d..4993ae0de7 100644 --- a/src/msg/gos.c +++ b/src/msg/gos.c @@ -4,8 +4,7 @@ /* 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" @@ -39,7 +38,7 @@ MSG_error_t MSG_task_execute(m_task_t task) { 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; @@ -51,9 +50,9 @@ MSG_error_t MSG_task_execute(m_task_t task) 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); @@ -63,29 +62,24 @@ MSG_error_t MSG_task_execute(m_task_t task) #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; @@ -93,9 +87,8 @@ MSG_error_t MSG_task_execute(m_task_t task) 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 @@ -104,7 +97,6 @@ MSG_error_t MSG_task_execute(m_task_t task) 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 @@ -151,12 +143,10 @@ MSG_parallel_task_create(const char *name, int host_nb, /* 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; @@ -175,65 +165,55 @@ MSG_parallel_task_create(const char *name, int host_nb, 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); } - } @@ -246,58 +226,35 @@ MSG_error_t MSG_parallel_task_execute(m_task_t task) */ 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) { + if (SIMIX_req_host_get_state(SIMIX_host_self()) == SURF_RESOURCE_OFF) { #ifdef HAVE_TRACING TRACE_msg_process_sleep_out(MSG_process_self()); #endif MSG_RETURN(MSG_HOST_FAILURE); } } 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 @@ -419,14 +376,14 @@ MSG_task_receive_ext(m_task_t * task, const char *alias, double timeout, } /** \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) { @@ -436,58 +393,50 @@ 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); + 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 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. * - * 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. + * \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) +msg_comm_t MSG_task_irecv(m_task_t *task, const char *alias) { - smx_comm_t comm; - smx_rdv_t rdv = MSG_mailbox_get_by_alias(alias)->rdv; - msg_mailbox_t mailbox = MSG_mailbox_get_by_alias(alias); + smx_rdv_t rdv = MSG_mailbox_get_by_alias(alias); CHECK_HOST(); /* FIXME: these functions are not tracable */ - memset(&comm, 0, sizeof(comm)); - - /* 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)); - /* Sanity check */ xbt_assert0(task, "Null pointer for the task storage"); @@ -496,38 +445,130 @@ msg_comm_t MSG_task_irecv(m_task_t * task, const char *alias) ("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 @@ -541,44 +582,42 @@ void MSG_comm_destroy(msg_comm_t comm) 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; } - /* 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) { @@ -589,21 +628,79 @@ 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 @@ -688,6 +785,7 @@ MSG_task_put_with_timeout(m_task_t task, m_host_t dest, && (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); @@ -822,166 +920,3 @@ int MSG_task_listen_from(const char *alias) 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); - } -}