3 /* Copyright (c) 2002-2007 Arnaud Legrand. */
4 /* Copyright (c) 2007 Bruno Donassolo. */
5 /* All rights reserved. */
7 /* This program is free software; you can redistribute it and/or modify it
8 * under the terms of the license (GNU LGPL) which comes with this package. */
10 #include "msg/private.h"
11 #include "xbt/sysdep.h"
13 #include "msg_mailbox.h"
15 /** \defgroup m_host_management Management functions of Hosts
16 * \brief This section describes the host structure of MSG
18 /** @addtogroup m_host_management
19 * \htmlonly <!-- DOXYGEN_NAVBAR_LABEL="Hosts" --> \endhtmlonly
20 * (#m_host_t) and the functions for managing it.
22 * A <em>location</em> (or <em>host</em>) is any possible place where
23 * a process may run. Thus it may be represented as a
24 * <em>physical resource with computing capabilities</em>, some
25 * <em>mailboxes</em> to enable running process to communicate with
26 * remote ones, and some <em>private data</em> that can be only
27 * accessed by local process.
31 /********************************* Host **************************************/
32 m_host_t __MSG_host_create(smx_host_t workstation, void *data)
35 simdata_host_t simdata = xbt_new0(s_simdata_host_t, 1);
36 m_host_t host = xbt_new0(s_m_host_t, 1);
39 char alias[MAX_ALIAS_NAME +1] = {0}; /* buffer used to build the key of the mailbox */
40 msg_mailbox_t mailbox;
42 name = SIMIX_host_get_name(workstation);
44 host->name = xbt_strdup(name);
45 host->simdata = simdata;
48 simdata->smx_host = workstation;
50 simdata->mbox = xbt_new0(xbt_fifo_t, msg_global->max_channel);
52 for (i = 0; i < msg_global->max_channel; i++)
54 sprintf(alias,"%s:%d",name,i);
56 /* the key of the mailbox (in this case) is build from the name of the host and the channel number */
57 mailbox = MSG_mailbox_new(alias);
58 MSG_mailbox_set_hostname(mailbox,name);
59 memset(alias,0,MAX_ALIAS_NAME +1);
61 simdata->mbox[i] = xbt_fifo_new();
64 simdata->sleeping = xbt_new0(smx_cond_t, msg_global->max_channel);
65 simdata->mutex = SIMIX_mutex_init();
66 SIMIX_host_set_data(workstation, host);
68 /* Update global variables */
69 xbt_fifo_unshift(msg_global->host, host);
74 /** \ingroup m_host_management
76 * \brief Set the user data of a #m_host_t.
78 * This functions checks whether some data has already been associated to \a host
79 or not and attach \a data to \a host if it is possible.
81 MSG_error_t MSG_host_set_data(m_host_t host, void *data)
83 xbt_assert0((host != NULL), "Invalid parameters");
84 xbt_assert0((host->data == NULL), "Data already set");
92 /** \ingroup m_host_management
94 * \brief Return the user data of a #m_host_t.
96 * This functions checks whether \a host is a valid pointer or not and return
97 the user data associated to \a host if it is possible.
99 void *MSG_host_get_data(m_host_t host)
102 xbt_assert0((host != NULL), "Invalid parameters");
108 /** \ingroup m_host_management
110 * \brief Return the name of the #m_host_t.
112 * This functions checks whether \a host is a valid pointer or not and return
115 const char *MSG_host_get_name(m_host_t host)
118 xbt_assert0((host != NULL)
119 && (host->simdata != NULL), "Invalid parameters");
125 /** \ingroup m_host_management
127 * \brief Return the location on which the current process is executed.
129 m_host_t MSG_host_self(void)
131 return MSG_process_get_host(MSG_process_self());
135 * Real function to destroy a host.
136 * MSG_host_destroy is just a front_end that also removes it from
139 void __MSG_host_destroy(m_host_t host)
141 simdata_host_t simdata = NULL;
143 char alias[MAX_ALIAS_NAME +1] = {0}; /* buffer used to build the key of the mailbox */
145 xbt_assert0((host != NULL), "Invalid parameters");
147 /* Clean Simulator data */
148 /* SIMIX host will be cleaned when MSG_clean calls SIMIX_clean */
149 simdata = (host)->simdata;
151 for (i = 0; i < msg_global->max_channel; i++)
153 sprintf(alias,"%s:%d",host->name,i);
154 xbt_dict_remove(MSG_get_mailboxes(),alias);
155 memset(alias,0,MAX_ALIAS_NAME +1);
157 xbt_fifo_free(simdata->mbox[i]);
161 free(simdata->sleeping);
162 SIMIX_mutex_destroy(simdata->mutex);
165 /* Clean host structure */
172 /** \ingroup m_host_management
173 * \brief Return the current number of #m_host_t.
175 int MSG_get_host_number(void)
177 return (xbt_fifo_size(msg_global->host));
180 /** \ingroup m_host_management
181 * \brief Return a array of all the #m_host_t.
183 m_host_t *MSG_get_host_table(void)
185 return ((m_host_t *) xbt_fifo_to_array(msg_global->host));
188 /** \ingroup m_host_management
189 * \brief Return the number of MSG tasks currently running on a
190 * #m_host_t. The external load is not taken in account.
192 int MSG_get_host_msgload(m_host_t h)
194 xbt_assert0((h != NULL), "Invalid parameters");
195 xbt_assert0(0, "Not implemented yet");
200 /** \ingroup m_host_management
201 * \brief Return the speed of the processor (in flop/s), regardless of
202 the current load on the machine.
204 double MSG_get_host_speed(m_host_t h)
206 xbt_assert0((h != NULL), "Invalid parameters");
208 return (SIMIX_host_get_speed(h->simdata->smx_host));
211 /** \ingroup m_host_management
212 * \brief Returns the value of a given host property
215 * \param name a property name
216 * \return value of a property (or NULL if property not set)
218 const char* MSG_host_get_property_value(m_host_t host, const char* name)
220 return xbt_dict_get_or_null(MSG_host_get_properties(host), name);
223 /** \ingroup m_host_management
224 * \brief Returns a xbt_dynar_t consisting of the list of properties assigned to this host
227 * \return a dict containing the properties
229 xbt_dict_t MSG_host_get_properties(m_host_t host)
231 xbt_assert0((host != NULL), "Invalid parameters");
233 return (SIMIX_host_get_properties(host->simdata->smx_host));
237 /** \ingroup msg_gos_functions
238 * \brief Determine if a host is available.
240 * \param h host to test
242 int MSG_host_is_avail(m_host_t h)
244 xbt_assert0((h != NULL), "Invalid parameters");
245 return (SIMIX_host_get_state(h->simdata->smx_host));