/* $Id$ */
/* Copyright (c) 2002,2003,2004 Arnaud Legrand. 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 "xbt/log.h"
/** \defgroup m_host_management Management functions of Hosts
* \brief This section describes the host structure of MSG
*
* \htmlonly \endhtmlonly
* (#m_host_t) and the functions for managing it.
*
* A location (or host) is any possible place where
* a process may run. Thus it may be represented as a
* physical resource with computing capabilities, some
* mailboxes to enable running process to communicate with
* remote ones, and some private data that can be only
* accessed by local process.
* \see m_host_t
*/
/********************************* Host **************************************/
m_host_t __MSG_host_create(const char *name,
void *workstation,
void *data)
{
simdata_host_t simdata = xbt_new0(s_simdata_host_t,1);
m_host_t host = xbt_new0(s_m_host_t,1);
int i;
/* Host structure */
host->name = xbt_strdup(name);
host->simdata = simdata;
host->data = data;
simdata->host = workstation;
simdata->mbox = xbt_new0(xbt_fifo_t, msg_global->max_channel);
for (i = 0; i < msg_global->max_channel; i++)
simdata->mbox[i] = xbt_fifo_new();
simdata->sleeping = xbt_new0(m_process_t, msg_global->max_channel);
simdata->process_list = xbt_fifo_new();
/* Update global variables */
xbt_fifo_unshift(msg_global->host, host);
PAJE_HOST_NEW(host);
return host;
}
/** \ingroup m_host_management
*
* \brief Set the user data of a #m_host_t.
*
* This functions checks whether some data has already been associated to \a host
or not and attach \a data to \a host if it is possible.
*/
MSG_error_t MSG_host_set_data(m_host_t host, void *data)
{
xbt_assert0((host!=NULL), "Invalid parameters");
xbt_assert0((host->data == NULL), "Data already set");
/* Assign data */
host->data = data;
return MSG_OK;
}
/** \ingroup m_host_management
*
* \brief Return the user data of a #m_host_t.
*
* This functions checks whether \a host is a valid pointer or not and return
the user data associated to \a host if it is possible.
*/
void *MSG_host_get_data(m_host_t host)
{
xbt_assert0((host != NULL), "Invalid parameters");
/* Return data */
return (host->data);
}
/** \ingroup m_host_management
*
* \brief Return the name of the #m_host_t.
*
* This functions checks whether \a host is a valid pointer or not and return
its name.
*/
const char *MSG_host_get_name(m_host_t host)
{
xbt_assert0((host != NULL) && (host->simdata != NULL), "Invalid parameters");
/* Return data */
return (host->name);
}
/** \ingroup m_host_management
*
* \brief Return the location on which the current process is executed.
*/
m_host_t MSG_host_self(void)
{
return MSG_process_get_host(MSG_process_self());
}
/*
* Real function for destroy a host.
* MSG_host_destroy is just a front_end that also removes it from
* msg_global->host
*/
void __MSG_host_destroy(m_host_t host)
{
simdata_host_t simdata = NULL;
int i = 0;
xbt_assert0((host != NULL), "Invalid parameters");
PAJE_HOST_FREE(host);
/* Clean Simulator data */
simdata = (host)->simdata;
for (i = 0; i < msg_global->max_channel; i++)
xbt_fifo_free(simdata->mbox[i]);
free(simdata->mbox);
free(simdata->sleeping);
xbt_assert0((xbt_fifo_size(simdata->process_list)==0),
"Some process are still running on this host");
xbt_fifo_free(simdata->process_list);
free(simdata);
/* Clean host structure */
free(host->name);
free(host);
return;
}
/** \ingroup m_host_management
* \brief Return the current number of #m_host_t.
*/
int MSG_get_host_number(void)
{
return (xbt_fifo_size(msg_global->host));
}
/** \ingroup m_host_management
* \brief Return a array of all the #m_host_t.
*/
m_host_t *MSG_get_host_table(void)
{
return ((m_host_t *)xbt_fifo_to_array(msg_global->host));
}
/** \ingroup m_host_management
* \brief Return the number of MSG tasks currently running on a
* #m_host_t. The external load is not taken in account.
*/
int MSG_get_host_msgload(m_host_t h)
{
xbt_assert0((h!= NULL), "Invalid parameters");
xbt_assert0(0, "Not implemented yet");
return(0);
/* return(surf_workstation_resource->extension_public->get_load(h->simdata->host)); */
}
/** \ingroup m_host_management
* \brief Return the speed of the processor (in Mflop/s), regardless of
the current load on the machine.
*/
double MSG_get_host_speed(m_host_t h)
{
xbt_assert0((h!= NULL), "Invalid parameters");
return(surf_workstation_resource->
extension_public->get_speed(h->simdata->host,1.0));
}
/** \ingroup msg_gos_functions
* \brief Determine if a host is available.
*
* \param h host to test
*/
int MSG_host_is_avail (m_host_t h)
{
e_surf_cpu_state_t cpustate;
xbt_assert0((h!= NULL), "Invalid parameters");
cpustate =
surf_workstation_resource->extension_public->get_state(h->simdata->host);
xbt_assert0((cpustate == SURF_CPU_ON || cpustate == SURF_CPU_OFF),
"Invalid cpu state");
return (cpustate==SURF_CPU_ON);
}