X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/a7bdcd8afa4b48dad527d34ba2dbc52f037e2c12..76a93840692d8668298e016732d899d26a6b5b12:/src/msg/gos.c diff --git a/src/msg/gos.c b/src/msg/gos.c index d00b79152a..ba0d5be5a1 100644 --- a/src/msg/gos.c +++ b/src/msg/gos.c @@ -1,158 +1,291 @@ /* $Id$ */ - + /* Copyright (c) 2002-2007 Arnaud Legrand. */ /* Copyright (c) 2007 Bruno Donassolo. */ /* 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 "msg/private.h" #include "xbt/sysdep.h" #include "xbt/log.h" +#include "mailbox.h" -XBT_LOG_NEW_DEFAULT_SUBCATEGORY(msg_gos, msg, "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. +XBT_LOG_NEW_DEFAULT_SUBCATEGORY(msg_gos, msg, + "Logging specific to MSG (gos)"); + +/** \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(); +} -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) +/** \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_surf_action_state_t state = SURF_ACTION_NOT_IN_THE_SYSTEM; + CHECK_HOST(); - m_process_t process = MSG_process_self(); - m_task_t t = NULL; - m_host_t h = NULL; - simdata_task_t t_simdata = NULL; - simdata_host_t h_simdata = NULL; - int first_time = 1; - xbt_fifo_item_t item = NULL; + simdata = task->simdata; + xbt_assert0((!simdata->compute) && (task->simdata->refcount == 1),"This task is executed somewhere else. Go fix your code!"); - smx_cond_t cond = NULL; //conditional wait if the task isn't on the channel yet + DEBUG1("Computing on %s", MSG_process_self()->simdata->m_host->name); - 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); - - SIMIX_mutex_lock(h->simdata->mutex); - 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) { - SIMIX_mutex_unlock(h->simdata->mutex); - h_simdata->sleeping[channel] = NULL; - SIMIX_cond_destroy(cond); - MSG_RETURN(MSG_TRANSFER_FAILURE); - } - } - xbt_assert1(!(h_simdata->sleeping[channel]),"A process is already blocked on channel %d", channel); - - cond = SIMIX_cond_init(); - h_simdata->sleeping[channel] = cond; - if (max_duration > 0) { - SIMIX_cond_wait_timeout(cond, h->simdata->mutex, max_duration); - } - else SIMIX_cond_wait(h_simdata->sleeping[channel],h->simdata->mutex); + simdata->refcount ++; + SIMIX_mutex_lock(simdata->mutex); + simdata->compute = SIMIX_action_execute(SIMIX_host_self(), task->name, simdata->computation_amount); + SIMIX_action_set_priority(simdata->compute, simdata->priority); - if(SIMIX_host_get_state(h_simdata->s_host)==0) - MSG_RETURN(MSG_HOST_FAILURE); + self->simdata->waiting_task = task; + 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); + self->simdata->waiting_task = NULL; - first_time = 0; - } - SIMIX_mutex_unlock(h->simdata->mutex); + SIMIX_mutex_unlock(simdata->mutex); + simdata->refcount --; - DEBUG1("OK, got a task (%s)", t->name); - /* clean conditional */ - if (cond) { - SIMIX_cond_destroy(cond); - h_simdata->sleeping[channel] = NULL; + if (SIMIX_action_get_state(task->simdata->compute) == SURF_ACTION_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) + { + /* 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); } +} + +/** \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->cond = SIMIX_cond_init(); + simdata->mutex = SIMIX_mutex_init(); + simdata->compute = NULL; + simdata->comm = NULL; + simdata->rate = -1.0; + simdata->refcount = 1; + 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; + + 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; + 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),"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); + + simdata->refcount ++; + + 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); + + self->simdata->waiting_task = task; + 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); + self->simdata->waiting_task = NULL; + + + SIMIX_mutex_unlock(simdata->mutex); + simdata->refcount --; - t_simdata = t->simdata; - t_simdata->receiver = process; - *task=t; - - SIMIX_mutex_lock(t_simdata->mutex); - - /* Transfer */ - t_simdata->using++; - /* create SIMIX action to the communication */ - t_simdata->comm = SIMIX_action_communicate(t_simdata->sender->simdata->m_host->simdata->s_host, - process->simdata->m_host->simdata->s_host,t->name, t_simdata->message_size, - t_simdata->rate); - /* if the process is suspend, create the action but stop its execution, it will be restart when the sender process resume */ - if (MSG_process_is_suspended(t_simdata->sender)) { - DEBUG1("Process sender (%s) suspended", t_simdata->sender->name); - SIMIX_action_set_priority(t_simdata->comm,0); + if (SIMIX_action_get_state(task->simdata->compute) == SURF_ACTION_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) + { + /* 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); } - process->simdata->waiting_task = t; - SIMIX_register_action_to_condition(t_simdata->comm, t_simdata->cond); - SIMIX_cond_wait(t_simdata->cond,t_simdata->mutex); - process->simdata->waiting_task = NULL; - - /* the task has already finished and the pointer must be null*/ - if (t->simdata->sender) { - t->simdata->sender->simdata->waiting_task = NULL; + else + { /* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */ - //t->simdata->comm = NULL; - //t->simdata->compute = NULL; + SIMIX_action_destroy(task->simdata->compute); + simdata->comm = NULL; + simdata->compute = NULL; + MSG_RETURN(MSG_TASK_CANCELLED); } - /* for this process, don't need to change in get function*/ - t->simdata->receiver = NULL; - SIMIX_mutex_unlock(t_simdata->mutex); - - - if(SIMIX_action_get_state(t_simdata->comm) == SURF_ACTION_DONE) { - //t_simdata->comm = NULL; - SIMIX_action_destroy(t_simdata->comm); - t_simdata->comm = NULL; - MSG_RETURN(MSG_OK); - } else if (SIMIX_host_get_state(h_simdata->s_host)==0) { - //t_simdata->comm = NULL; - SIMIX_action_destroy(t_simdata->comm); - t_simdata->comm = NULL; - MSG_RETURN(MSG_HOST_FAILURE); - } else { - //t_simdata->comm = NULL; - SIMIX_action_destroy(t_simdata->comm); - t_simdata->comm = NULL; - MSG_RETURN(MSG_TRANSFER_FAILURE); - } } - + + /** \ingroup msg_gos_functions - * \brief Listen on a channel and wait for receiving a task. + * \brief Sleep for the specified number of seconds * - * It takes two parameters. + * 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) +{ + 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; + + /* 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(); + + 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); + 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_CPU_OFF) + { + SIMIX_action_destroy(act_sleep); + MSG_RETURN(MSG_HOST_FAILURE); + } + } + else + { + SIMIX_action_destroy(act_sleep); + MSG_RETURN(MSG_HOST_FAILURE); + } + + SIMIX_action_destroy(act_sleep); + MSG_RETURN(MSG_OK); +} + +/** \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) +{ + xbt_die("not implemented yet"); + return 0; +} + + + +/** \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 @@ -160,19 +293,20 @@ static MSG_error_t __MSG_task_get_with_time_out_from_host(m_task_t * task, * \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. + 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_from_host(m_task_t * task, m_channel_t channel, m_host_t host) { - return MSG_task_get_with_time_out(task, channel, -1); + return MSG_task_get_ext(task, channel, -1, host); } /** \ingroup msg_gos_functions - * \brief Listen on a channel and wait for receiving a task with a timeout. + * \brief Listen on a channel and wait for receiving a task. * - * It takes three parameters. + * 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 @@ -180,22 +314,17 @@ MSG_error_t MSG_task_get(m_task_t * task, * \param channel the channel on which the agent should be listening. This value has to be >=0 and < than the maximal number of channels fixed with MSG_set_channel_number(). - * \param max_duration the maximum time to wait for a task before giving - up. In such a case, #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_time_out(m_task_t * task, - m_channel_t channel, - double max_duration) +MSG_error_t +MSG_task_get(m_task_t * task, m_channel_t channel) { - return __MSG_task_get_with_time_out_from_host(task, channel, max_duration, NULL); + return MSG_task_get_with_timeout(task, channel, -1); } /** \ingroup msg_gos_functions - * \brief Listen on \a channel and waits for receiving a task from \a host. + * \brief Listen on a channel and wait for receiving a task with a timeout. * * It takes three parameters. * \param task a memory location for storing a #m_task_t. It will @@ -205,173 +334,100 @@ MSG_error_t MSG_task_get_with_time_out(m_task_t * task, * \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. + * \param max_duration 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 and will still be + equal to \c NULL when returning. * \return #MSG_FATAL if \a task is equal to \c NULL, #MSG_WARNING if \a *task is not equal to \c NULL, and #MSG_OK otherwise. */ -MSG_error_t MSG_task_get_from_host(m_task_t * task, int channel, - m_host_t host) +MSG_error_t +MSG_task_get_with_timeout(m_task_t * task, m_channel_t channel, double max_duration) { - return __MSG_task_get_with_time_out_from_host(task, channel, -1, host); + return MSG_task_get_ext(task, channel, max_duration, NULL); } -/** \ingroup msg_gos_functions - * \brief Test whether there is a pending communication on a channel. - * - * 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 +/** \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. */ -int MSG_task_Iprobe(m_channel_t channel) -{ - m_host_t h = NULL; - - xbt_assert1((channel>=0) && (channel < msg_global->max_channel),"Invalid channel %d",channel); - CHECK_HOST(); - DEBUG2("Probing on channel %d (%s)", channel,h->name); +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); - h = MSG_host_self(); - return(xbt_fifo_get_first_item(h->simdata->mbox[channel])!=NULL); + return MSG_mailbox_get_task_ext(MSG_mailbox_get_by_channel(MSG_host_self(), channel), task, host, timeout); } -/** \ingroup msg_gos_functions - * \brief Test whether there is a pending communication on a channel, and who sent it. - * - * 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 - */ -int MSG_task_probe_from(m_channel_t channel) +MSG_error_t +MSG_task_receive_from_host(m_task_t * task, const char* alias, m_host_t host) { - m_host_t h = NULL; - xbt_fifo_item_t item; - m_task_t t; + return MSG_task_receive_ext(task, alias, -1, host); +} - xbt_assert1((channel>=0) && (channel < msg_global->max_channel),"Invalid channel %d",channel); - CHECK_HOST(); +MSG_error_t +MSG_task_receive(m_task_t * task, const char* alias) +{ + return MSG_task_receive_with_timeout(task, alias, -1); +} - h = MSG_host_self(); +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); +} - 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); +MSG_error_t +MSG_task_receive_ext(m_task_t* task, const char* alias, double timeout, m_host_t host) +{ + return MSG_mailbox_get_task_ext(MSG_mailbox_get_by_alias(alias), task, host, timeout); } + /** \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. + * \brief Put a task on a channel of an host and waits for the end of the + * transmission. * - * 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. + * 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_channel_select_from(m_channel_t channel, double max_duration, - int *PID) +MSG_error_t +MSG_task_put(m_task_t task, m_host_t dest, m_channel_t channel) { - m_host_t h = NULL; - simdata_host_t h_simdata = NULL; - xbt_fifo_item_t item; - m_task_t t; - int first_time = 1; - smx_cond_t cond; - - xbt_assert1((channel>=0) && (channel < msg_global->max_channel),"Invalid channel %d",channel); - if(PID) { - *PID = -1; - } - - 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); - } - } - SIMIX_mutex_lock(h_simdata->mutex); - xbt_assert1(!(h_simdata->sleeping[channel]), - "A process is already blocked on this channel %d", channel); - cond = SIMIX_cond_init(); - h_simdata->sleeping[channel] = cond; /* I'm waiting. Wake me up when you're ready */ - if(max_duration>0) { - SIMIX_cond_wait_timeout(cond,h_simdata->mutex, max_duration); - } 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->s_host)==0) { - 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_RETURN(MSG_OK); - } + return MSG_task_put_with_timeout(task, dest, channel, -1.0); } - /** \ingroup msg_gos_functions - - * \brief Return the number of tasks waiting to be received on a \a - channel and sent by \a host. + * \brief Does exactly the same as MSG_task_put but with a bounded transmition + * rate. * - * 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. + * \sa MSG_task_put */ -int MSG_task_probe_from_host(int channel, m_host_t host) +MSG_error_t +MSG_task_put_bounded(m_task_t task, m_host_t dest, m_channel_t channel, double maxrate) { - 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(); - - DEBUG2("Probing on channel %d (%s)", channel,h->name); - - xbt_fifo_foreach(h->simdata->mbox[channel],item,t,m_task_t) { - if(t->simdata->source==host) count++; - } - - return count; + task->simdata->rate = maxrate; + return MSG_task_put(task, dest, channel); } /** \ingroup msg_gos_functions \brief Put a task on a channel of an @@ -394,376 +450,323 @@ int MSG_task_probe_from_host(int channel, m_host_t host) * \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 max_duration 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 + * \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. 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_put_with_timeout(m_task_t task, m_host_t dest, - m_channel_t channel, double max_duration) +MSG_error_t +MSG_task_put_with_timeout(m_task_t task, m_host_t dest, m_channel_t channel, double timeout) { + xbt_assert1((channel >= 0) && (channel < msg_global->max_channel), "Invalid channel %d", channel); + return MSG_mailbox_put_with_timeout(MSG_mailbox_get_by_channel(dest, channel), task, timeout); +} - m_process_t process = MSG_process_self(); - simdata_task_t task_simdata = NULL; - m_host_t local_host = NULL; - m_host_t remote_host = NULL; - CHECK_HOST(); +MSG_error_t +MSG_task_send(m_task_t task,const char* alias) +{ + return MSG_task_send_with_timeout(task, alias, -1); +} - xbt_assert1((channel>=0) && (channel < msg_global->max_channel),"Invalid channel %d",channel); - - task_simdata = task->simdata; - task_simdata->sender = process; - task_simdata->source = MSG_process_get_host(process); - xbt_assert0(task_simdata->using==1, - "This task is still being used somewhere else. You cannot send it now. Go fix your code!"); - task_simdata->comm = NULL; - - local_host = ((simdata_process_t) process->simdata)->m_host; - remote_host = dest; - - DEBUG4("Trying to send a task (%g kB) from %s to %s on channel %d", - task->simdata->message_size/1000,local_host->name, remote_host->name, channel); - - SIMIX_mutex_lock(remote_host->simdata->mutex); - xbt_fifo_push(((simdata_host_t) remote_host->simdata)-> - mbox[channel], task); - - - if(remote_host->simdata->sleeping[channel]) { - DEBUG0("Somebody is listening. Let's wake him up!"); - SIMIX_cond_signal(remote_host->simdata->sleeping[channel]); - } - SIMIX_mutex_unlock(remote_host->simdata->mutex); - - process->simdata->put_host = dest; - process->simdata->put_channel = channel; - SIMIX_mutex_lock(task->simdata->mutex); - // DEBUG4("Task sent (%g kB) from %s to %s on channel %d, waiting...", task->simdata->message_size/1000,local_host->name, remote_host->name, channel); - - process->simdata->waiting_task = task; - if (max_duration >0) { - SIMIX_cond_wait_timeout(task->simdata->cond,task->simdata->mutex,max_duration); - /* verify if the timeout happened and the communication didn't started yet */ - if (task->simdata->comm==NULL) { - task->simdata->using--; - process->simdata->waiting_task = NULL; - xbt_fifo_remove(((simdata_host_t) remote_host->simdata)->mbox[channel], - task); - if (task->simdata->receiver) { - task->simdata->receiver->simdata->waiting_task = NULL; - } - task->simdata->sender = NULL; - SIMIX_mutex_unlock(task->simdata->mutex); - MSG_RETURN(MSG_TRANSFER_FAILURE); - } - } - else { - SIMIX_cond_wait(task->simdata->cond,task->simdata->mutex); - } - DEBUG1("Action terminated %s",task->name); - task->simdata->using--; - process->simdata->waiting_task = NULL; - /* the task has already finished and the pointer must be null*/ - if (task->simdata->receiver) { - task->simdata->receiver->simdata->waiting_task = NULL; - /* action ended, set comm and compute = NULL, the actions is already destroyed in the main function */ - // task->simdata->comm = NULL; - //task->simdata->compute = NULL; - } - task->simdata->sender = NULL; - SIMIX_mutex_unlock(task->simdata->mutex); - - if(SIMIX_action_get_state(task->simdata->comm) == SURF_ACTION_DONE) { - MSG_RETURN(MSG_OK); - } else if (SIMIX_host_get_state(local_host->simdata->s_host)==0) { - MSG_RETURN(MSG_HOST_FAILURE); - } else { - MSG_RETURN(MSG_TRANSFER_FAILURE); - } +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); +} + + +MSG_error_t +MSG_task_send_with_timeout(m_task_t task, const char* alias, double timeout) +{ + return MSG_mailbox_put_with_timeout(MSG_mailbox_get_by_alias(alias), task, timeout); +} + +int +MSG_task_listen(const char* alias) +{ + CHECK_HOST(); + + return !MSG_mailbox_is_empty(MSG_mailbox_get_by_alias(alias)); } /** \ingroup msg_gos_functions - * \brief Put a task on a channel of an host and waits for the end of the - * transmission. + * \brief Test whether there is a pending communication on a channel. * - * 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) + * 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 */ -MSG_error_t MSG_task_put(m_task_t task, - m_host_t dest, m_channel_t channel) +int +MSG_task_Iprobe(m_channel_t channel) { - return MSG_task_put_with_timeout(task, dest, channel, -1.0); + xbt_assert1((channel >= 0) && (channel < msg_global->max_channel), "Invalid channel %d", channel); + + CHECK_HOST(); + + return !MSG_mailbox_is_empty(MSG_mailbox_get_by_channel(MSG_host_self(), channel)); } /** \ingroup msg_gos_functions - * \brief Does exactly the same as MSG_task_put but with a bounded transmition - * rate. + + * \brief Return the number of tasks waiting to be received on a \a + channel and sent by \a host. * - * \sa MSG_task_put + * 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. */ -MSG_error_t MSG_task_put_bounded(m_task_t task, - m_host_t dest, m_channel_t channel, - double max_rate) +int +MSG_task_probe_from_host(int channel, m_host_t host) { - MSG_error_t res = MSG_OK; - task->simdata->rate=max_rate; - res = MSG_task_put(task, dest, channel); - return(res); + xbt_assert1((channel >= 0) && (channel < msg_global->max_channel), "Invalid channel %d", channel); + + CHECK_HOST(); + + return MSG_mailbox_get_count_host_waiting_tasks(MSG_mailbox_get_by_channel(MSG_host_self(), channel),host); + +} + +int +MSG_task_listen_from_host(const char* alias, m_host_t host) +{ + CHECK_HOST(); + + return MSG_mailbox_get_count_host_waiting_tasks(MSG_mailbox_get_by_alias(alias),host); } /** \ingroup msg_gos_functions - * \brief Executes a task and waits for its termination. + * \brief Test whether there is a pending communication on a channel, and who sent it. * - * 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. + * 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_task_execute(m_task_t task) +int +MSG_task_probe_from(m_channel_t channel) { - simdata_task_t simdata = NULL; - m_process_t self = MSG_process_self(); - CHECK_HOST(); + m_task_t task; - simdata = task->simdata; - xbt_assert0((!simdata->compute)&&(task->simdata->using==1), - "This task is executed somewhere else. Go fix your code!"); - - DEBUG1("Computing on %s", MSG_process_self()->simdata->m_host->name); - simdata->using++; - SIMIX_mutex_lock(simdata->mutex); - simdata->compute = SIMIX_action_execute(SIMIX_host_self(), task->name, simdata->computation_amount); - SIMIX_action_set_priority(simdata->compute, simdata->priority); + CHECK_HOST(); - self->simdata->waiting_task = task; - SIMIX_register_action_to_condition(simdata->compute, simdata->cond); - SIMIX_cond_wait(simdata->cond, simdata->mutex); - self->simdata->waiting_task = NULL; + xbt_assert1((channel >= 0) && (channel < msg_global->max_channel), "Invalid channel %d", channel); - SIMIX_mutex_unlock(simdata->mutex); - simdata->using--; + if(NULL == (task = MSG_mailbox_get_head(MSG_mailbox_get_by_channel(MSG_host_self(), channel)))) + return -1; - if(SIMIX_action_get_state(task->simdata->compute) == SURF_ACTION_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) { - /* 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); - } + return MSG_process_get_PID(task->simdata->sender); } +int +MSG_task_listen_from(const char* alias) +{ + m_task_t task; -/** \ingroup m_task_management - * \brief Creates a new #m_task_t (a parallel one....). + CHECK_HOST(); + + if(NULL == (task = MSG_mailbox_get_head(MSG_mailbox_get_by_alias(alias)))) + return -1; + + 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. * - * 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 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. */ -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) +MSG_error_t +MSG_channel_select_from(m_channel_t channel,double timeout, int *PID) { - 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->cond = SIMIX_cond_init(); - simdata->mutex = SIMIX_mutex_init(); - simdata->compute = NULL; - simdata->comm = NULL; - simdata->rate = -1.0; - simdata->using = 1; - simdata->sender = NULL; - simdata->receiver = NULL; - simdata->source = NULL; + 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; - simdata->host_nb = host_nb; - simdata->host_list = xbt_new0(void *, host_nb); - simdata->comp_amount = computation_amount; - simdata->comm_amount = communication_amount; + xbt_assert1((channel >= 0) && (channel < msg_global->max_channel), "Invalid channel %d",channel); - for(i=0;ihost_list[i] = host_list[i]->simdata->s_host; + if(PID) + { + *PID = -1; + } - return task; + 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); + } + } -MSG_error_t MSG_parallel_task_execute(m_task_t task) -{ - simdata_task_t simdata = NULL; - m_process_t self = MSG_process_self(); - CHECK_HOST(); + SIMIX_mutex_lock(h_simdata->mutex); - simdata = task->simdata; - xbt_assert0((!simdata->compute)&&(task->simdata->using==1), - "This task is executed somewhere else. Go fix your code!"); + xbt_assert1(!MSG_mailbox_get_cond(mailbox),"A process is already blocked on this channel %d",channel); - 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); - simdata->using++; - 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); + cond = SIMIX_cond_init(); - self->simdata->waiting_task = task; - SIMIX_register_action_to_condition(simdata->compute, simdata->cond); - SIMIX_cond_wait(simdata->cond, simdata->mutex); - self->simdata->waiting_task = NULL; + 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_mutex_unlock(simdata->mutex); - simdata->using--; + SIMIX_cond_destroy(cond); + SIMIX_mutex_unlock(h_simdata->mutex); - if(SIMIX_action_get_state(task->simdata->compute) == SURF_ACTION_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) { - /* 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); - } + 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); + } } -/** \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) +MSG_error_t +MSG_alias_select_from(const char* alias, double timeout, int* PID) { - smx_action_t act_sleep; - m_process_t proc = MSG_process_self(); - smx_mutex_t mutex; + m_host_t h = NULL; + simdata_host_t h_simdata = NULL; + m_task_t t; + int first_time = 1; smx_cond_t cond; - /* 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(); - - SIMIX_register_action_to_condition(act_sleep, cond); - SIMIX_cond_wait(cond,mutex); - SIMIX_mutex_unlock(mutex); + msg_mailbox_t mailbox; - /* remove variables */ - SIMIX_cond_destroy(cond); - SIMIX_mutex_destroy(mutex); + if (PID) + { + *PID = -1; + } - if(SIMIX_action_get_state(act_sleep) == SURF_ACTION_DONE) { - if(SIMIX_host_get_state(SIMIX_host_self()) == SURF_CPU_OFF) { - SIMIX_action_destroy(act_sleep); - MSG_RETURN(MSG_HOST_FAILURE); - } - } - else { - SIMIX_action_destroy(act_sleep); - MSG_RETURN(MSG_HOST_FAILURE); + 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); - MSG_RETURN(MSG_OK); -} + mailbox = MSG_mailbox_get_by_alias(alias); -/** \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) -{ - xbt_die("not implemented yet"); - return 0; -} + while(MSG_mailbox_is_empty(mailbox)) + { + if(timeout > 0) + { + if (!first_time) + { + MSG_RETURN(MSG_OK); + } + } -/** \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(); + 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); + } } + + + + +