3 /* Copyright (c) 2002,2003,2004 Arnaud Legrand. All rights reserved. */
5 /* This program is free software; you can redistribute it and/or modify it
6 * under the terms of the license (GNU LGPL) which comes with this package. */
9 #include "xbt/sysdep.h"
12 /** \defgroup m_host_management Management functions of Hosts
13 * \brief This section describes the host structure of MSG
14 * (#m_host_t) and the functions for managing it.
16 * A <em>location</em> (or <em>host</em>) is any possible place where
17 * a process may run. Thus it may be represented as a
18 * <em>physical resource with computing capabilities</em>, some
19 * <em>mailboxes</em> to enable running process to communicate with
20 * remote ones, and some <em>private data</em> that can be only
21 * accessed by local process.
25 /********************************* Host **************************************/
26 m_host_t __MSG_host_create(const char *name,
30 simdata_host_t simdata = xbt_new0(s_simdata_host_t,1);
31 m_host_t host = xbt_new0(s_m_host_t,1);
35 host->name = xbt_strdup(name);
36 host->simdata = simdata;
39 simdata->host = workstation;
41 simdata->mbox = xbt_new0(xbt_fifo_t, msg_global->max_channel);
42 for (i = 0; i < msg_global->max_channel; i++)
43 simdata->mbox[i] = xbt_fifo_new();
44 simdata->sleeping = xbt_new0(m_process_t, msg_global->max_channel);
45 simdata->process_list = xbt_fifo_new();
46 /* Update global variables */
48 xbt_fifo_unshift(msg_global->host, host);
55 /** \ingroup m_host_management
57 * \brief Set the user data of a #m_host_t.
59 * This functions checks whether some data has already been associated to \a host
60 or not and attach \a data to \a host if it is possible.
62 MSG_error_t MSG_host_set_data(m_host_t host, void *data)
64 xbt_assert0((host!=NULL), "Invalid parameters");
65 xbt_assert0((host->data == NULL), "Data already set");
73 /** \ingroup m_host_management
75 * \brief Return the user data of a #m_host_t.
77 * This functions checks whether \a host is a valid pointer or not and return
78 the user data associated to \a host if it is possible.
80 void *MSG_host_get_data(m_host_t host)
83 xbt_assert0((host != NULL), "Invalid parameters");
89 /** \ingroup m_host_management
91 * \brief Return the name of the #m_host_t.
93 * This functions checks whether \a host is a valid pointer or not and return
96 const char *MSG_host_get_name(m_host_t host)
99 xbt_assert0((host != NULL) && (host->simdata != NULL), "Invalid parameters");
105 /** \ingroup m_host_management
107 * \brief Return the location on which the current process is executed.
109 m_host_t MSG_host_self(void)
111 return MSG_process_get_host(MSG_process_self());
115 * Real function for destroy a host.
116 * MSG_host_destroy is just a front_end that also removes it from
119 void __MSG_host_destroy(m_host_t host)
121 simdata_host_t simdata = NULL;
124 xbt_assert0((host != NULL), "Invalid parameters");
126 PAJE_HOST_FREE(host);
128 /* Clean Simulator data */
129 simdata = (host)->simdata;
131 for (i = 0; i < msg_global->max_channel; i++)
132 xbt_fifo_free(simdata->mbox[i]);
134 free(simdata->sleeping);
135 xbt_assert0((xbt_fifo_size(simdata->process_list)==0),
136 "Some process are still running on this host");
137 xbt_fifo_free(simdata->process_list);
141 /* Clean host structure */
148 /** \ingroup m_host_management
149 * \brief Return the current number of #m_host_t.
151 int MSG_get_host_number(void)
153 return (xbt_fifo_size(msg_global->host));
156 /** \ingroup m_host_management
157 * \brief Return a array of all the #m_host_t.
159 m_host_t *MSG_get_host_table(void)
161 return ((m_host_t *)xbt_fifo_to_array(msg_global->host));
164 /** \ingroup m_host_management
165 * \brief Return the number of MSG tasks currently running on a
166 * #m_host_t. The external load is not taken in account.
168 int MSG_get_host_msgload(m_host_t h)
170 xbt_assert0((h!= NULL), "Invalid parameters");
171 xbt_assert0(0, "Not implemented yet");
174 /* return(surf_workstation_resource->extension_public->get_load(h->simdata->host)); */
177 /** \ingroup m_host_management
178 * \brief Return the speed of the processor (in Mflop/s), regardless of
179 the current load on the machine.
181 double MSG_get_host_speed(m_host_t h)
183 xbt_assert0((h!= NULL), "Invalid parameters");
185 return(surf_workstation_resource->
186 extension_public->get_speed(h->simdata->host,1.0));
189 /** \ingroup msg_gos_functions
190 * \brief Determine if a host is available.
192 * \param h host to test
194 int MSG_host_is_avail (m_host_t h)
196 xbt_assert0((h!= NULL), "Invalid parameters");
198 e_surf_cpu_state_t cpustate =
199 surf_workstation_resource->extension_public->get_state(h->simdata->host);
201 xbt_assert0((cpustate == SURF_CPU_ON || cpustate == SURF_CPU_OFF),
202 "Invalid cpu state");
204 return (cpustate==SURF_CPU_ON);