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
16 /** \addtogroup m_host_management
17 * \htmlonly <!-- DOXYGEN_NAVBAR_LABEL="Hosts" --> \endhtmlonly
18 * (#m_host_t) and the functions for managing it.
20 * A <em>location</em> (or <em>host</em>) is any possible place where
21 * a process may run. Thus it may be represented as a
22 * <em>physical resource with computing capabilities</em>, some
23 * <em>mailboxes</em> to enable running process to communicate with
24 * remote ones, and some <em>private data</em> that can be only
25 * accessed by local process.
29 /********************************* Host **************************************/
30 m_host_t __MSG_host_create(const char *name,
34 simdata_host_t simdata = xbt_new0(s_simdata_host_t,1);
35 m_host_t host = xbt_new0(s_m_host_t,1);
39 host->name = xbt_strdup(name);
40 host->simdata = simdata;
43 simdata->host = workstation;
45 simdata->mbox = xbt_new0(xbt_fifo_t, msg_global->max_channel);
46 for (i = 0; i < msg_global->max_channel; i++)
47 simdata->mbox[i] = xbt_fifo_new();
48 simdata->sleeping = xbt_new0(m_process_t, msg_global->max_channel);
49 simdata->process_list = xbt_fifo_new();
50 /* Update global variables */
52 xbt_fifo_unshift(msg_global->host, host);
59 /** \ingroup m_host_management
61 * \brief Set the user data of a #m_host_t.
63 * This functions checks whether some data has already been associated to \a host
64 or not and attach \a data to \a host if it is possible.
66 MSG_error_t MSG_host_set_data(m_host_t host, void *data)
68 xbt_assert0((host!=NULL), "Invalid parameters");
69 xbt_assert0((host->data == NULL), "Data already set");
77 /** \ingroup m_host_management
79 * \brief Return the user data of a #m_host_t.
81 * This functions checks whether \a host is a valid pointer or not and return
82 the user data associated to \a host if it is possible.
84 void *MSG_host_get_data(m_host_t host)
87 xbt_assert0((host != NULL), "Invalid parameters");
93 /** \ingroup m_host_management
95 * \brief Return the name of the #m_host_t.
97 * This functions checks whether \a host is a valid pointer or not and return
100 const char *MSG_host_get_name(m_host_t host)
103 xbt_assert0((host != NULL) && (host->simdata != NULL), "Invalid parameters");
109 /** \ingroup m_host_management
111 * \brief Return the location on which the current process is executed.
113 m_host_t MSG_host_self(void)
115 return MSG_process_get_host(MSG_process_self());
119 * Real function for destroy a host.
120 * MSG_host_destroy is just a front_end that also removes it from
123 void __MSG_host_destroy(m_host_t host)
125 simdata_host_t simdata = NULL;
128 xbt_assert0((host != NULL), "Invalid parameters");
130 PAJE_HOST_FREE(host);
132 /* Clean Simulator data */
133 simdata = (host)->simdata;
135 for (i = 0; i < msg_global->max_channel; i++)
136 xbt_fifo_free(simdata->mbox[i]);
138 free(simdata->sleeping);
139 xbt_assert0((xbt_fifo_size(simdata->process_list)==0),
140 "Some process are still running on this host");
141 xbt_fifo_free(simdata->process_list);
145 /* Clean host structure */
152 /** \ingroup m_host_management
153 * \brief Return the current number of #m_host_t.
155 int MSG_get_host_number(void)
157 return (xbt_fifo_size(msg_global->host));
160 /** \ingroup m_host_management
161 * \brief Return a array of all the #m_host_t.
163 m_host_t *MSG_get_host_table(void)
165 return ((m_host_t *)xbt_fifo_to_array(msg_global->host));
168 /** \ingroup m_host_management
169 * \brief Return the number of MSG tasks currently running on a
170 * #m_host_t. The external load is not taken in account.
172 int MSG_get_host_msgload(m_host_t h)
174 xbt_assert0((h!= NULL), "Invalid parameters");
175 xbt_assert0(0, "Not implemented yet");
178 /* return(surf_workstation_resource->extension_public->get_load(h->simdata->host)); */
181 /** \ingroup m_host_management
182 * \brief Return the speed of the processor (in flop/s), regardless of
183 the current load on the machine.
185 double MSG_get_host_speed(m_host_t h)
187 xbt_assert0((h!= NULL), "Invalid parameters");
189 return(surf_workstation_resource->
190 extension_public->get_speed(h->simdata->host,1.0));
193 /** \ingroup msg_gos_functions
194 * \brief Determine if a host is available.
196 * \param h host to test
198 int MSG_host_is_avail (m_host_t h)
200 e_surf_cpu_state_t cpustate;
201 xbt_assert0((h!= NULL), "Invalid parameters");
204 surf_workstation_resource->extension_public->get_state(h->simdata->host);
206 xbt_assert0((cpustate == SURF_CPU_ON || cpustate == SURF_CPU_OFF),
207 "Invalid cpu state");
209 return (cpustate==SURF_CPU_ON);