X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/c5151a86dde4a71352f55b9209bb3edc8b824aeb..00e8231fa94528961cddaa1fe35e232de5438e76:/src/msg/gos.c diff --git a/src/msg/gos.c b/src/msg/gos.c index fd74bc8fec..4c4480e2ee 100644 --- a/src/msg/gos.c +++ b/src/msg/gos.c @@ -1,181 +1,298 @@ -/* $Id$ */ - -/* Copyright (c) 2002,2003,2004 Arnaud Legrand. All rights reserved. */ +/* Copyright (c) 2004, 2005, 2006, 2007, 2008, 2009, 2010. The SimGrid Team. + * All rights reserved. */ /* 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 "private.h" #include "xbt/sysdep.h" +#include "mc/mc.h" #include "xbt/log.h" +#include "mailbox.h" + + XBT_LOG_NEW_DEFAULT_SUBCATEGORY(msg_gos, msg, - "Logging specific to MSG (gos)"); + "Logging specific to MSG (gos)"); -/** \defgroup msg_gos_functions MSG Operating System Functions - * \brief This section describes the functions that can be used - * by an agent for handling some task. +/** \ingroup msg_gos_functions + * + * \brief Return the last value returned by a MSG function (except + * MSG_get_errno...). */ - -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) +MSG_error_t MSG_get_errno(void) { - 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; - e_surf_action_state_t state = SURF_ACTION_NOT_IN_THE_SYSTEM; - xbt_fifo_item_t item = NULL; + return PROCESS_GET_ERRNO(); +} +/** \ingroup msg_gos_functions + * \brief Executes a task and waits for its termination. + * + * This function is used for describing the behavior of an agent. It + * takes only one parameter. + * \param task a #m_task_t to execute on the location on which the + agent is running. + * \return #MSG_FATAL if \a task is not properly initialized and + * #MSG_OK otherwise. + */ +MSG_error_t MSG_task_execute(m_task_t task) +{ + simdata_task_t simdata = NULL; + m_process_t self = MSG_process_self(); + e_smx_state_t comp_state; CHECK_HOST(); - xbt_assert1((channel>=0) && (channel < msg_global->max_channel),"Invalid channel %d",channel); - /* Sanity check */ - xbt_assert0(task,"Null pointer for the task\n"); - - 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 %d (%s)", channel,h->name); - - 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); - } - } - xbt_assert3(!(h_simdata->sleeping[channel]), - "A process (%s(%d)) is already blocked on channel %d", - h_simdata->sleeping[channel]->name, - h_simdata->sleeping[channel]->simdata->PID, - channel); - h_simdata->sleeping[channel] = process; /* I'm waiting. Wake me up when you're ready */ - if(max_duration>0) { - __MSG_process_block(max_duration); - } else { - __MSG_process_block(-1); - } - h_simdata->sleeping[channel] = NULL; - first_time = 0; - if(surf_workstation_resource->extension_public->get_state(h_simdata->host) - == SURF_CPU_OFF) - MSG_RETURN(MSG_HOST_FAILURE); - /* 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); + simdata = task->simdata; - if(__MSG_process_isBlocked(t_simdata->sender)) { - DEBUG1("Unblocking %s",t_simdata->sender->name); - __MSG_process_unblock(t_simdata->sender); - } + xbt_assert0(simdata->host_nb == 0, + "This is a parallel task. Go to hell."); + +#ifdef HAVE_TRACING + TRACE_msg_task_execute_start(task); +#endif - PAJE_PROCESS_PUSH_STATE(process,"C",t); + xbt_assert1((!simdata->compute) && (task->simdata->isused == 0), + "This task is executed somewhere else. Go fix your code! %d", + task->simdata->isused); - 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"); + DEBUG1("Computing on %s", MSG_process_self()->simdata->m_host->name); - if(t->simdata->using>1) { - xbt_fifo_unshift(msg_global->process_to_run,process); - xbt_context_yield(); + if (simdata->computation_amount == 0) { +#ifdef HAVE_TRACING + TRACE_msg_task_execute_end(task); +#endif + return MSG_OK; + } + simdata->isused=1; + simdata->compute = + 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 + + self->simdata->waiting_action = simdata->compute; + comp_state = SIMIX_req_host_execution_wait(simdata->compute); + self->simdata->waiting_action = NULL; + + simdata->isused=0; + + 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 */ + simdata->computation_amount = 0.0; + simdata->comm = NULL; + simdata->compute = NULL; +#ifdef HAVE_TRACING + TRACE_msg_task_execute_end(task); +#endif + MSG_RETURN(MSG_OK); + } 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 */ + simdata->comm = NULL; + simdata->compute = NULL; +#ifdef HAVE_TRACING + TRACE_msg_task_execute_end(task); +#endif + MSG_RETURN(MSG_HOST_FAILURE); + } else { + /* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */ + simdata->comm = NULL; + simdata->compute = NULL; +#ifdef HAVE_TRACING + TRACE_msg_task_execute_end(task); +#endif + MSG_RETURN(MSG_TASK_CANCELLED); } +} - PAJE_PROCESS_POP_STATE(process); - PAJE_COMM_STOP(process,t,channel); +/** \ingroup m_task_management + * \brief Creates a new #m_task_t (a parallel one....). + * + * A constructor for #m_task_t taking six arguments and returning the + corresponding object. + * \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 \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 \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. + * \see m_task_t + * \return The new corresponding object. + */ +m_task_t +MSG_parallel_task_create(const char *name, int host_nb, + const m_host_t * host_list, + double *computation_amount, + double *communication_amount, void *data) +{ + int i; + simdata_task_t simdata = xbt_new0(s_simdata_task_t, 1); + m_task_t task = xbt_new0(s_m_task_t, 1); + task->simdata = simdata; + + /* Task structure */ + task->name = xbt_strdup(name); + task->data = data; + + /* Simulator Data */ + simdata->computation_amount = 0; + simdata->message_size = 0; + simdata->compute = NULL; + simdata->comm = NULL; + simdata->rate = -1.0; + simdata->isused = 0; + simdata->sender = NULL; + simdata->receiver = NULL; + simdata->source = NULL; + + simdata->host_nb = host_nb; + simdata->host_list = xbt_new0(smx_host_t, host_nb); + simdata->comp_amount = computation_amount; + simdata->comm_amount = communication_amount; - if(state == SURF_ACTION_DONE) { - if(surf_workstation_resource->common_public->action_free(t_simdata->comm)) - t_simdata->comm = NULL; + for (i = 0; i < host_nb; i++) + simdata->host_list[i] = host_list[i]->simdata->smx_host; + + return task; +} + +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(); + CHECK_HOST(); + + simdata = task->simdata; + + xbt_assert0((!simdata->compute) + && (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("Parallel computing on %s", MSG_process_self()->simdata->m_host->name); + + simdata->isused=1; + + simdata->compute = + 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; + 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); + + simdata->isused=0; + + if (comp_state == SIMIX_DONE) { + /* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */ + simdata->computation_amount = 0.0; + simdata->comm = NULL; + simdata->compute = NULL; MSG_RETURN(MSG_OK); - } else if(surf_workstation_resource->extension_public->get_state(h_simdata->host) - == SURF_CPU_OFF) { - if(surf_workstation_resource->common_public->action_free(t_simdata->comm)) - t_simdata->comm = NULL; + } 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 */ + simdata->comm = NULL; + simdata->compute = NULL; MSG_RETURN(MSG_HOST_FAILURE); } else { - if(surf_workstation_resource->common_public->action_free(t_simdata->comm)) - t_simdata->comm = NULL; - MSG_RETURN(MSG_TRANSFER_FAILURE); + /* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */ + simdata->comm = NULL; + simdata->compute = NULL; + MSG_RETURN(MSG_TASK_CANCELLED); } } + +/** \ingroup msg_gos_functions + * \brief Sleep for the specified number of seconds + * + * Makes the current process sleep until \a time seconds have elapsed. + * + * \param nb_sec a number of second + */ +MSG_error_t MSG_process_sleep(double nb_sec) +{ + 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 */ + 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()); +#endif + MSG_RETURN(MSG_OK); + } else { +#ifdef HAVE_TRACING + TRACE_msg_process_sleep_out(MSG_process_self()); +#endif + MSG_RETURN(MSG_HOST_FAILURE); + } +} + +/** \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, m_channel_t channel, m_host_t host) +{ + return MSG_task_get_ext(task, channel, -1, host); +} + /** \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. + 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(). + 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) +MSG_error_t MSG_task_get(m_task_t * task, m_channel_t channel) { - return MSG_task_get_with_time_out(task, channel, -1); + return MSG_task_get_with_timeout(task, channel, -1); } /** \ingroup msg_gos_functions @@ -183,582 +300,653 @@ MSG_error_t MSG_task_get(m_task_t * task, * * 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. + 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(). + 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. + up. In such a case, #MSG_TRANSFER_FAILURE will be returned, \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. + if \a *task is not equal to \c NULL, and #MSG_OK otherwise. + */ +MSG_error_t +MSG_task_get_with_timeout(m_task_t * task, m_channel_t channel, + double max_duration) +{ + return MSG_task_get_ext(task, channel, max_duration, NULL); +} + +/** \defgroup msg_gos_functions MSG Operating System Functions + * \brief This section describes the functions that can be used + * by an agent for handling some task. */ -MSG_error_t MSG_task_get_with_time_out(m_task_t * task, - m_channel_t channel, - double max_duration) + +MSG_error_t +MSG_task_get_ext(m_task_t * task, m_channel_t channel, double timeout, + m_host_t host) +{ + xbt_assert1((channel >= 0) + && (channel < msg_global->max_channel), "Invalid channel %d", + channel); + + return + MSG_mailbox_get_task_ext(MSG_mailbox_get_by_channel + (MSG_host_self(), channel), task, host, + timeout); +} + +MSG_error_t +MSG_task_receive_from_host(m_task_t * task, const char *alias, + m_host_t host) +{ + return MSG_task_receive_ext(task, alias, -1, host); +} + +MSG_error_t MSG_task_receive(m_task_t * task, const char *alias) +{ + return MSG_task_receive_with_timeout(task, alias, -1); +} + +MSG_error_t +MSG_task_receive_with_timeout(m_task_t * task, const char *alias, + double timeout) +{ + return MSG_task_receive_ext(task, alias, timeout, NULL); +} + +MSG_error_t +MSG_task_receive_ext(m_task_t * task, const char *alias, double timeout, + m_host_t host) { - return __MSG_task_get_with_time_out_from_host(task, channel, max_duration, NULL); + DEBUG1 + ("MSG_task_receive_ext: Trying to receive a message on mailbox '%s'", + alias); + return MSG_mailbox_get_task_ext(MSG_mailbox_get_by_alias(alias), task, + host, timeout); } /** \ingroup msg_gos_functions - * \brief Listen on \a channel and waits for receiving a task from \a host. + * \brief Sends a task on a mailbox. * - * 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. + * This is a non blocking function: use MSG_comm_wait() or MSG_comm_test() + * to end the communication. + * + * \param task a #m_task_t to send on another location. + * \param alias name of the mailbox to sent the task to + * \return the msg_comm_t communication created */ -MSG_error_t MSG_task_get_from_host(m_task_t * task, int channel, - m_host_t host) +msg_comm_t MSG_task_isend(m_task_t task, const char *alias) { - return __MSG_task_get_with_time_out_from_host(task, channel, -1, host); + 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 traceable */ + + /* Prepare the task to send */ + t_simdata = task->simdata; + t_simdata->sender = process; + t_simdata->source = MSG_host_self(); + + 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->isused = 1; + msg_global->sent_msg++; + + /* 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? */ + + return comm; } /** \ingroup msg_gos_functions - * \brief Test whether there is a pending communication on a channel. + * \brief Sends a task on a mailbox. * - * It takes one parameter. - * \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 1 if there is a pending communication and 0 otherwise + * 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 */ -int MSG_task_Iprobe(m_channel_t channel) +void MSG_task_dsend(m_task_t task, const char *alias, void_f_pvoid_t cleanup) { - m_host_t h = NULL; - simdata_host_t h_simdata = NULL; + simdata_task_t t_simdata = NULL; + m_process_t process = MSG_process_self(); + msg_mailbox_t mailbox = MSG_mailbox_get_by_alias(alias); - xbt_assert1((channel>=0) && (channel < msg_global->max_channel),"Invalid channel %d",channel); - DEBUG2("Probing on channel %d (%s)", channel,h->name); CHECK_HOST(); - h = MSG_host_self(); - h_simdata = h->simdata; - return(xbt_fifo_get_first_item(h_simdata->mbox[channel])!=NULL); + + /* 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->isused == 0, + "This task is still being used somewhere else. You cannot send it now. Go fix your code!"); + + 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 Test whether there is a pending communication on a channel, and who sent it. + * \brief Starts listening for receiving a task from an asynchronous communication. * - * It takes one parameter. - * \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 -1 if there is no pending communication and the PID of the process who sent it otherwise + * 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 */ -int MSG_task_probe_from(m_channel_t channel) +msg_comm_t MSG_task_irecv(m_task_t *task, const char *alias) { - m_host_t h = NULL; - simdata_host_t h_simdata = NULL; - xbt_fifo_item_t item; - m_task_t t; + smx_rdv_t rdv = MSG_mailbox_get_by_alias(alias); - 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); - - item = xbt_fifo_get_first_item(h->simdata->mbox[channel]); - if (!item || !(t = xbt_fifo_get_item_content(item))) - return -1; - - return MSG_process_get_PID(t->simdata->sender); + /* FIXME: these functions are not tracable */ + + /* 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."); + + /* Try to receive it by calling SIMIX network layer */ + 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 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. + * \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. */ -MSG_error_t MSG_channel_select_from(m_channel_t channel, double max_duration, - int *PID) -{ - m_host_t h = NULL; - simdata_host_t h_simdata = NULL; - xbt_fifo_item_t item; - m_task_t t; - int first_time = 1; - m_process_t process = MSG_process_self(); +int MSG_comm_test(msg_comm_t 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; +} - xbt_assert1((channel>=0) && (channel < msg_global->max_channel),"Invalid channel %d",channel); - if(PID) { - *PID = -1; +/** \ingroup msg_gos_functions + * \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); } - if(max_duration==0.0) { - *PID = MSG_task_probe_from(channel); - MSG_RETURN(MSG_OK); - } else { - CHECK_HOST(); - h = MSG_host_self(); - h_simdata = h->simdata; - - DEBUG2("Probing on channel %d (%s)", channel,h->name); - while(!(item = xbt_fifo_get_first_item(h->simdata->mbox[channel]))) { - if(max_duration>0) { - if(!first_time) { - MSG_RETURN(MSG_OK); - } - } - xbt_assert2(!(h_simdata->sleeping[channel]), - "A process (%s(%d)) is already blocked on this channel", - h_simdata->sleeping[channel]->name, - h_simdata->sleeping[channel]->simdata->PID); - h_simdata->sleeping[channel] = process; /* I'm waiting. Wake me up when you're ready */ - if(max_duration>0) { - __MSG_process_block(max_duration); - } else { - __MSG_process_block(-1); - } - if(surf_workstation_resource->extension_public->get_state(h_simdata->host) - == SURF_CPU_OFF) { - MSG_RETURN(MSG_HOST_FAILURE); - } - h_simdata->sleeping[channel] = NULL; - first_time = 0; - } - if (!item || !(t = xbt_fifo_get_item_content(item))) { - MSG_RETURN(MSG_OK); - } - if(PID) { - *PID = MSG_process_get_PID(t->simdata->sender); + 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; } - MSG_RETURN(MSG_OK); + 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; + } -/** \ingroup msg_gos_functions + return finished_index; +} - * \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. +/** \ingroup msg_gos_functions + * \brief Destroys a communication. + * \param comm the communication to destroy. */ -int MSG_task_probe_from_host(int channel, m_host_t host) +void MSG_comm_destroy(msg_comm_t comm) { - 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++; + if (comm->task_received != NULL + && *comm->task_received != NULL + && MSG_comm_get_status(comm) == MSG_OK) { + (*comm->task_received)->simdata->isused = 0; } - - return count; + + /* FIXME auto-destroy comms from SIMIX to avoid this request */ + SIMIX_req_comm_destroy(comm->s_comm); + free(comm); } /** \ingroup msg_gos_functions - * \brief Put a task on a channel of an host and waits for the end of the - * transmission. + * \brief Wait for the completion of a communication. * - * This function is used for describing the behavior of an agent. It - * takes three parameter. - * \param task a #m_task_t to send on another location. This task - will not be usable anymore when the function will return. There is - no automatic task duplication and you have to save your parameters - before calling this function. Tasks are unique and once it has been - sent to another location, you should not access it anymore. You do - not need to call MSG_task_destroy() but to avoid using, as an - effect of inattention, this task anymore, you definitely should - renitialize it with #MSG_TASK_UNINITIALIZED. Note that this task - can be transfered iff it has been correctly created with - MSG_task_create(). - * \param dest the destination of the message - * \param channel 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 #MSG_FATAL if \a task is not properly initialized and - * #MSG_OK otherwise. + * It takes two parameters. + * \param comm the communication to wait. + * \param timeout Wait until the communication terminates or the timeout occurs + * \return MSG_error_t */ -MSG_error_t MSG_task_put(m_task_t task, - m_host_t dest, m_channel_t channel) +MSG_error_t MSG_comm_wait(msg_comm_t comm, double timeout) { - m_process_t process = MSG_process_self(); - simdata_task_t task_simdata = NULL; - e_surf_action_state_t state = SURF_ACTION_NOT_IN_THE_SYSTEM; - m_host_t local_host = NULL; - m_host_t remote_host = NULL; + xbt_ex_t e; + TRY { + SIMIX_req_comm_wait(comm->s_comm, timeout); - CHECK_HOST(); - - xbt_assert1((channel>=0) && (channel < msg_global->max_channel),"Invalid channel %d",channel); + if (comm->task_received != NULL) { + /* I am the receiver */ + (*comm->task_received)->simdata->isused = 0; + } - task_simdata = task->simdata; - task_simdata->sender = process; - task_simdata->source = MSG_process_get_host(process); - xbt_assert0(task_simdata->using==1, - "This taks is still being used somewhere else. You cannot send it now. Go fix your code!"); - task_simdata->comm = NULL; - - local_host = ((simdata_process_t) process->simdata)->host; - remote_host = dest; + /* FIXME: these functions are not traceable */ + } + CATCH(e) { + switch (e.category) { + case host_error: + comm->status = MSG_HOST_FAILURE; + break; + case network_error: + comm->status = MSG_TRANSFER_FAILURE; + break; + case timeout_error: + comm->status = MSG_TIMEOUT; + break; + default: + RETHROW; + } + xbt_ex_free(e); + } - DEBUG4("Trying to send a task (%g Mb) from %s to %s on channel %d", - task->simdata->message_size,local_host->name, remote_host->name, channel); + return comm->status; +} - xbt_fifo_push(((simdata_host_t) remote_host->simdata)-> - mbox[channel], task); +/** \ingroup msg_gos_functions +* \brief This function is called by a sender and permit to wait for each communication +* +* \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 +*/ +void MSG_comm_waitall(msg_comm_t * comm, int nb_elem, double timeout) +{ + int i = 0; + for (i = 0; i < nb_elem; i++) { + MSG_comm_wait(comm[i], timeout); + } +} - PAJE_COMM_START(process,task,channel); - - if(remote_host->simdata->sleeping[channel]) { - DEBUG0("Somebody is listening. Let's wake him up!"); - __MSG_process_unblock(remote_host->simdata->sleeping[channel]); +/** \ingroup msg_gos_functions + * \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) +{ + 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); } - process->simdata->put_host = dest; - process->simdata->put_channel = channel; - while(!(task_simdata->comm)) { - DEBUG0("Communication not initiated yet. Let's block!"); - __MSG_process_block(-1); - if(surf_workstation_resource->extension_public-> - get_state(local_host->simdata->host) == SURF_CPU_OFF) { - xbt_fifo_remove(((simdata_host_t) remote_host->simdata)->mbox[channel], - task); - MSG_task_destroy(task); - MSG_RETURN(MSG_HOST_FAILURE); + 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); } - 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; + xbt_assert0(finished_index != -1, "WaitAny returned -1"); + xbt_dynar_free(&s_comms); - PAJE_PROCESS_PUSH_STATE(process,"C",task); + comm = xbt_dynar_get_as(comms, finished_index, msg_comm_t); + /* the communication is finished */ + comm->status = status; - 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 */ + return finished_index; +} - PAJE_PROCESS_POP_STATE(process); +/** + * \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) { - if(state == SURF_ACTION_DONE) { - if(surf_workstation_resource->common_public->action_free(task_simdata->comm)) - task_simdata->comm = NULL; - MSG_task_destroy(task); - MSG_RETURN(MSG_OK); - } else if(surf_workstation_resource->extension_public->get_state(local_host->simdata->host) - == SURF_CPU_OFF) { - if(surf_workstation_resource->common_public->action_free(task_simdata->comm)) - task_simdata->comm = NULL; - MSG_task_destroy(task); - MSG_RETURN(MSG_HOST_FAILURE); - } else { - if(surf_workstation_resource->common_public->action_free(task_simdata->comm)) - task_simdata->comm = NULL; - MSG_task_destroy(task); - MSG_RETURN(MSG_TRANSFER_FAILURE); - } + return comm->status; +} + +m_task_t MSG_comm_get_task(msg_comm_t comm) +{ + xbt_assert0(comm, "Invalid parameter"); + + return comm->task_received ? *comm->task_received : comm->task_sent; } /** \ingroup msg_gos_functions - * \brief Does exactly the same as MSG_task_put but with a bounded transmition + * \brief Put a task on a channel of an host and waits for the end of the + * transmission. + * + * This function is used for describing the behavior of an agent. It + * takes three parameter. + * \param task a #m_task_t to send on another location. This task + will not be usable anymore when the function will return. There is + no automatic task duplication and you have to save your parameters + before calling this function. Tasks are unique and once it has been + sent to another location, you should not access it anymore. You do + not need to call MSG_task_destroy() but to avoid using, as an + effect of inattention, this task anymore, you definitely should + renitialize it with #MSG_TASK_UNINITIALIZED. Note that this task + can be transfered iff it has been correctly created with + MSG_task_create(). + * \param dest the destination of the message + * \param channel 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 #MSG_FATAL if \a task is not properly initialized and + * #MSG_OK otherwise. Returns #MSG_HOST_FAILURE if the host on which + * this function was called was shut down. Returns + * #MSG_TRANSFER_FAILURE if the transfer could not be properly done + * (network failure, dest failure) + */ +MSG_error_t MSG_task_put(m_task_t task, m_host_t dest, m_channel_t channel) +{ + return MSG_task_put_with_timeout(task, dest, channel, -1.0); +} + +/** \ingroup msg_gos_functions + * \brief Does exactly the same as MSG_task_put but with a bounded transmition * rate. * * \sa MSG_task_put */ -MSG_error_t MSG_task_put_bounded(m_task_t task, - m_host_t dest, m_channel_t channel, - double max_rate) +MSG_error_t +MSG_task_put_bounded(m_task_t task, m_host_t dest, m_channel_t channel, + double maxrate) { - MSG_error_t res = MSG_OK; - task->simdata->rate=max_rate; - res = MSG_task_put(task, dest, channel); - return(res); + task->simdata->rate = maxrate; + return MSG_task_put(task, dest, channel); } -/** \ingroup msg_gos_functions - * \brief Executes a task and waits for its termination. +/** \ingroup msg_gos_functions \brief Put a task on a channel of an + * host (with a timeout on the waiting of the destination host) and + * waits for the end of the transmission. * * This function is used for describing the behavior of an agent. It - * takes only one parameter. - * \param task a #m_task_t to execute on the location on which the - agent is running. + * takes four parameter. + * \param task a #m_task_t to send on another location. This task + will not be usable anymore when the function will return. There is + no automatic task duplication and you have to save your parameters + before calling this function. Tasks are unique and once it has been + sent to another location, you should not access it anymore. You do + not need to call MSG_task_destroy() but to avoid using, as an + effect of inattention, this task anymore, you definitely should + renitialize it with #MSG_TASK_UNINITIALIZED. Note that this task + can be transfered iff it has been correctly created with + MSG_task_create(). + * \param dest the destination of the message + * \param channel 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(). + * \param timeout the maximum time to wait for a task before giving + up. In such a case, #MSG_TRANSFER_FAILURE will be returned, \a task + will not be modified * \return #MSG_FATAL if \a task is not properly initialized and - * #MSG_OK otherwise. +#MSG_OK otherwise. Returns #MSG_HOST_FAILURE if the host on which +this function was called was shut down. Returns +#MSG_TRANSFER_FAILURE if the transfer could not be properly done +(network failure, dest failure, timeout...) */ -MSG_error_t MSG_task_execute(m_task_t task) +MSG_error_t +MSG_task_put_with_timeout(m_task_t task, m_host_t dest, + m_channel_t channel, double timeout) { - m_process_t process = MSG_process_self(); - MSG_error_t res; + xbt_assert1((channel >= 0) + && (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); +} - DEBUG1("Computing on %s", process->simdata->host->name); +MSG_error_t MSG_task_send(m_task_t task, const char *alias) +{ + DEBUG1("MSG_task_send: Trying to send a message on mailbox '%s'", alias); + return MSG_task_send_with_timeout(task, alias, -1); +} - __MSG_task_execute(process, task); - PAJE_PROCESS_PUSH_STATE(process,"E",task); - res = __MSG_wait_for_computation(process,task); - PAJE_PROCESS_POP_STATE(process); - return res; +MSG_error_t +MSG_task_send_bounded(m_task_t task, const char *alias, double maxrate) +{ + task->simdata->rate = maxrate; + return MSG_task_send(task, alias); } -void __MSG_task_execute(m_process_t process, m_task_t task) + +MSG_error_t +MSG_task_send_with_timeout(m_task_t task, const char *alias, + double timeout) { - simdata_task_t simdata = NULL; + return MSG_mailbox_put_with_timeout(MSG_mailbox_get_by_alias(alias), + task, timeout); +} +int MSG_task_listen(const char *alias) +{ CHECK_HOST(); - simdata = task->simdata; - xbt_assert0((!simdata->compute)&&(task->simdata->using==1), - "This taks is executed somewhere else. Go fix your code!"); - task->simdata->using++; - simdata->compute = surf_workstation_resource->extension_public-> - execute(MSG_process_get_host(process)->simdata->host, - simdata->computation_amount); - surf_workstation_resource->common_public-> - set_priority(simdata->compute, simdata->priority); - - surf_workstation_resource->common_public->action_set_data(simdata->compute,task); - task->simdata->using--; -} - -MSG_error_t __MSG_wait_for_computation(m_process_t process, m_task_t task) -{ - 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); - state=surf_workstation_resource->common_public->action_get_state(simdata->compute); - } while (state==SURF_ACTION_RUNNING); - simdata->using--; - - - if(state == SURF_ACTION_DONE) { - 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); - } + return !MSG_mailbox_is_empty(MSG_mailbox_get_by_alias(alias)); } -/** \ingroup m_task_management - * \brief Creates a new #m_task_t (a parallel one....). + +/** \ingroup msg_gos_functions + * \brief Test whether there is a pending communication on a channel. * - * A constructor for #m_task_t taking six arguments and returning the - corresponding object. - * \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 \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 \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. - * \see m_task_t - * \return The new corresponding object. + * It takes one parameter. + * \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 1 if there is a pending communication and 0 otherwise */ -m_task_t MSG_parallel_task_create(const char *name, - int host_nb, - const m_host_t *host_list, - double *computation_amount, - double *communication_amount, - void *data) -{ - simdata_task_t simdata = xbt_new0(s_simdata_task_t,1); - m_task_t task = xbt_new0(s_m_task_t,1); - int i; - - /* Task structure */ - task->name = xbt_strdup(name); - task->simdata = simdata; - task->data = data; - - /* Simulator Data */ - simdata->sleeping = xbt_dynar_new(sizeof(m_process_t),NULL); - simdata->rate = -1.0; - simdata->using = 1; - simdata->sender = NULL; - simdata->source = NULL; - simdata->host_nb = host_nb; - - simdata->host_list = xbt_new0(void *, host_nb); - simdata->comp_amount = computation_amount; - simdata->comm_amount = communication_amount; +int MSG_task_Iprobe(m_channel_t channel) +{ + xbt_assert1((channel >= 0) + && (channel < msg_global->max_channel), "Invalid channel %d", + channel); - for(i=0;ihost_list[i] = host_list[i]->simdata->host; + CHECK_HOST(); - return task; + return + !MSG_mailbox_is_empty(MSG_mailbox_get_by_channel + (MSG_host_self(), channel)); } +/** \ingroup msg_gos_functions -static void __MSG_parallel_task_execute(m_process_t process, m_task_t task) + * \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_task_t simdata = NULL; + xbt_assert1((channel >= 0) + && (channel < msg_global->max_channel), "Invalid channel %d", + channel); CHECK_HOST(); - simdata = task->simdata; + return + MSG_mailbox_get_count_host_waiting_tasks(MSG_mailbox_get_by_channel + (MSG_host_self(), channel), + host); - xbt_assert0(simdata->host_nb,"This is not a parallel task. Go to hell."); - - simdata->compute = surf_workstation_resource->extension_public-> - execute_parallel_task(task->simdata->host_nb, - task->simdata->host_list, - task->simdata->comp_amount, - task->simdata->comm_amount, - 1.0, - -1.0); - if(simdata->compute) - surf_workstation_resource->common_public->action_set_data(simdata->compute,task); } -MSG_error_t MSG_parallel_task_execute(m_task_t task) +int MSG_task_listen_from_host(const char *alias, m_host_t host) { - m_process_t process = MSG_process_self(); - MSG_error_t res; - - DEBUG0("Computing on a tons of guys"); - - __MSG_parallel_task_execute(process, task); - - if(task->simdata->compute) - res = __MSG_wait_for_computation(process,task); - else - res = MSG_OK; + CHECK_HOST(); - return res; + return + MSG_mailbox_get_count_host_waiting_tasks(MSG_mailbox_get_by_alias + (alias), host); } - /** \ingroup msg_gos_functions - * \brief Sleep for the specified number of seconds - * - * Makes the current process sleep until \a time seconds have elapsed. + * \brief Test whether there is a pending communication on a channel, and who sent it. * - * \param nb_sec a number of second + * It takes one parameter. + * \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 -1 if there is no pending communication and the PID of the process who sent it otherwise */ -MSG_error_t MSG_process_sleep(double nb_sec) +int MSG_task_probe_from(m_channel_t channel) { - e_surf_action_state_t state = SURF_ACTION_NOT_IN_THE_SYSTEM; - m_process_t process = MSG_process_self(); - m_task_t dummy = NULL; - simdata_task_t simdata = NULL; + m_task_t task; CHECK_HOST(); - dummy = MSG_task_create("MSG_sleep", nb_sec, 0.0, NULL); - simdata = dummy->simdata; - simdata->compute = surf_workstation_resource->extension_public-> - sleep(MSG_process_get_host(process)->simdata->host, - simdata->computation_amount); - surf_workstation_resource->common_public->action_set_data(simdata->compute,dummy); + xbt_assert1((channel >= 0) + && (channel < msg_global->max_channel), "Invalid channel %d", + channel); - - simdata->using++; - do { - __MSG_task_wait_event(process, dummy); - state=surf_workstation_resource->common_public->action_get_state(simdata->compute); - } while (state==SURF_ACTION_RUNNING); - simdata->using--; - - if(state == SURF_ACTION_DONE) { - 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; - MSG_RETURN(MSG_HOST_FAILURE); - } - if(__MSG_process_isBlocked(process)) { - __MSG_process_unblock(MSG_process_self()); - } - 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; - MSG_RETURN(MSG_HOST_FAILURE); - } - if(surf_workstation_resource->common_public->action_free(simdata->compute)) - simdata->compute = NULL; - MSG_task_destroy(dummy); - MSG_RETURN(MSG_OK); - } else MSG_RETURN(MSG_HOST_FAILURE); + if (NULL == + (task = + MSG_mailbox_get_head(MSG_mailbox_get_by_channel + (MSG_host_self(), channel)))) + return -1; + + return MSG_process_get_PID(task->simdata->sender); } -/** \ingroup msg_gos_functions - * \brief Return the number of MSG tasks currently running on - * the host of the current running process. - */ -static int MSG_get_msgload(void) +int MSG_task_listen_from(const char *alias) { - m_process_t process; - + m_task_t task; + CHECK_HOST(); - - xbt_assert0(0, "This function is still to be specified correctly (what do you mean by 'load', exactly?). In the meantime, please don't use it"); - process = MSG_process_self(); - return xbt_fifo_size(process->simdata->host->simdata->process_list); -} -/** \ingroup msg_gos_functions - * - * \brief Return the last value returned by a MSG function (except - * MSG_get_errno...). - */ -MSG_error_t MSG_get_errno(void) -{ - return PROCESS_GET_ERRNO(); + if (NULL == + (task = MSG_mailbox_get_head(MSG_mailbox_get_by_alias(alias)))) + return -1; + + return MSG_process_get_PID(task->simdata->sender); }