1 /* Copyright (c) 2002-2007 Arnaud Legrand. */
2 /* Copyright (c) 2007 Bruno Donassolo. */
3 /* 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. */
8 #include "msg/private.h"
9 #include "xbt/sysdep.h"
13 /** \defgroup m_host_management Management functions of Hosts
14 * \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(smx_host_t workstation, void *data)
33 simdata_host_t simdata = xbt_new0(s_simdata_host_t, 1);
34 m_host_t host = xbt_new0(s_m_host_t, 1);
37 char alias[MAX_ALIAS_NAME + 1] = { 0 }; /* buffer used to build the key of the mailbox */
39 name = SIMIX_host_get_name(workstation);
41 host->name = xbt_strdup(name);
42 host->simdata = simdata;
45 simdata->smx_host = workstation;
47 if (msg_global->max_channel > 0)
48 simdata->mailboxes = xbt_new0(msg_mailbox_t, msg_global->max_channel);
50 for (i = 0; i < msg_global->max_channel; i++) {
51 sprintf(alias, "%s:%d", name, i);
53 /* the key of the mailbox (in this case) is build from the name of the host and the channel number */
54 simdata->mailboxes[i] = MSG_mailbox_create(alias);
55 memset(alias, 0, MAX_ALIAS_NAME + 1);
58 simdata->mutex = SIMIX_mutex_init();
59 SIMIX_host_set_data(workstation, host);
61 /* Update global variables */
62 xbt_fifo_unshift(msg_global->host, host);
67 /** \ingroup m_host_management
69 * \brief Set the user data of a #m_host_t.
71 * This functions checks whether some data has already been associated to \a host
72 or not and attach \a data to \a host if it is possible.
74 MSG_error_t MSG_host_set_data(m_host_t host, void *data)
76 xbt_assert0((host != NULL), "Invalid parameters");
77 xbt_assert0((host->data == NULL), "Data already set");
85 /** \ingroup m_host_management
87 * \brief Return the user data of a #m_host_t.
89 * This functions checks whether \a host is a valid pointer or not and return
90 the user data associated to \a host if it is possible.
92 void *MSG_host_get_data(m_host_t host)
95 xbt_assert0((host != NULL), "Invalid parameters");
101 /** \ingroup m_host_management
103 * \brief Return the name of the #m_host_t.
105 * This functions checks whether \a host is a valid pointer or not and return
108 const char *MSG_host_get_name(m_host_t host)
111 xbt_assert0((host != NULL)
112 && (host->simdata != NULL), "Invalid parameters");
118 /** \ingroup m_host_management
120 * \brief Return the location on which the current process is executed.
122 m_host_t MSG_host_self(void)
124 return MSG_process_get_host(MSG_process_self());
128 * Real function to destroy a host.
129 * MSG_host_destroy is just a front_end that also removes it from
132 void __MSG_host_destroy(m_host_t host)
134 simdata_host_t simdata = NULL;
136 char alias[MAX_ALIAS_NAME + 1] = { 0 }; /* buffer used to build the key of the mailbox */
138 xbt_assert0((host != NULL), "Invalid parameters");
140 /* Clean Simulator data */
141 /* SIMIX host will be cleaned when MSG_clean calls SIMIX_clean */
142 simdata = (host)->simdata;
144 for (i = 0; i < msg_global->max_channel; i++) {
145 sprintf(alias, "%s:%d", host->name, i);
146 MSG_mailbox_free((void *) (simdata->mailboxes[i]));
147 memset(alias, 0, MAX_ALIAS_NAME + 1);
150 if (msg_global->max_channel > 0)
151 free(simdata->mailboxes);
152 SIMIX_mutex_destroy(simdata->mutex);
155 /* Clean host structure */
162 /** \ingroup m_host_management
163 * \brief Return the current number of #m_host_t.
165 int MSG_get_host_number(void)
167 return (xbt_fifo_size(msg_global->host));
170 /** \ingroup m_host_management
171 * \brief Return a array of all the #m_host_t.
173 m_host_t *MSG_get_host_table(void)
175 return ((m_host_t *) xbt_fifo_to_array(msg_global->host));
178 /** \ingroup m_host_management
179 * \brief Return the number of MSG tasks currently running on a
180 * #m_host_t. The external load is not taken in account.
182 int MSG_get_host_msgload(m_host_t h)
184 xbt_assert0((h != NULL), "Invalid parameters");
185 xbt_assert0(0, "Not implemented yet");
190 /** \ingroup m_host_management
191 * \brief Return the speed of the processor (in flop/s), regardless of
192 the current load on the machine.
194 double MSG_get_host_speed(m_host_t h)
196 xbt_assert0((h != NULL), "Invalid parameters");
198 return (SIMIX_host_get_speed(h->simdata->smx_host));
201 /** \ingroup m_host_management
202 * \brief Returns the value of a given host property
205 * \param name a property name
206 * \return value of a property (or NULL if property not set)
208 const char *MSG_host_get_property_value(m_host_t host, const char *name)
210 return xbt_dict_get_or_null(MSG_host_get_properties(host), name);
213 /** \ingroup m_host_management
214 * \brief Returns a xbt_dynar_t consisting of the list of properties assigned to this host
217 * \return a dict containing the properties
219 xbt_dict_t MSG_host_get_properties(m_host_t host)
221 xbt_assert0((host != NULL), "Invalid parameters (host is NULL)");
223 return (SIMIX_host_get_properties(host->simdata->smx_host));
227 /** \ingroup msg_gos_functions
228 * \brief Determine if a host is available.
230 * \param h host to test
232 int MSG_host_is_avail(m_host_t h)
234 xbt_assert0((h != NULL), "Invalid parameters (host is NULL)");
235 return (SIMIX_host_get_state(h->simdata->smx_host));