1 /* Copyright (c) 2004, 2005, 2006, 2007, 2008, 2009, 2010. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
7 #include "msg/msg_private.h"
8 #include "msg/msg_mailbox.h"
9 #include "xbt/sysdep.h"
12 /** @addtogroup m_host_management
13 * \htmlonly <!-- DOXYGEN_NAVBAR_LABEL="Hosts" --> \endhtmlonly
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(smx_host_t workstation)
28 const char *name = SIMIX_host_get_name(workstation);
29 m_host_t host = xbt_new0(s_m_host_t, 1);
31 host->smx_host = workstation;
33 #ifdef MSG_USE_DEPRECATED
35 char alias[MAX_ALIAS_NAME + 1] = { 0 }; /* buffer used to build the key of the mailbox */
37 if (msg_global->max_channel > 0)
38 host->mailboxes = xbt_new0(msg_mailbox_t, msg_global->max_channel);
40 for (i = 0; i < msg_global->max_channel; i++) {
41 sprintf(alias, "%s:%d", name, i);
43 /* the key of the mailbox (in this case) is build from the name of the host and the channel number */
44 host->mailboxes[i] = MSG_mailbox_new(alias);
45 memset(alias, 0, MAX_ALIAS_NAME + 1);
49 simcall_host_set_data(workstation, host);
50 xbt_lib_set(host_lib,name,MSG_HOST_LEVEL,host);
55 /** \ingroup msg_host_management
56 * \brief Finds a m_host_t using its name.
58 * This is a name directory service
59 * \param name the name of an host.
60 * \return the corresponding host
62 m_host_t MSG_get_host_by_name(const char *name)
64 smx_host_t simix_h = NULL;
65 simix_h = simcall_host_get_by_name(name);
70 return (m_host_t) simcall_host_get_data(simix_h);
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 SIMIX_host_set_data(host->smx_host,data);
88 /** \ingroup m_host_management
90 * \brief Return the user data of a #m_host_t.
92 * This functions checks whether \a host is a valid pointer or not and return
93 the user data associated to \a host if it is possible.
95 void *MSG_host_get_data(m_host_t host)
98 return SIMIX_host_get_data(host->smx_host);
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) {
109 return SIMIX_host_get_name(host->smx_host);
112 /** \ingroup m_host_management
114 * \brief Return the location on which the current process is executed.
116 m_host_t MSG_host_self(void)
118 return MSG_process_get_host(NULL);
121 /** \ingroup m_host_management
123 * \brief Destroys a host (internal call only)
125 void __MSG_host_destroy(m_host_t host) {
127 #ifdef MSG_USE_DEPRECATED
128 if (msg_global->max_channel > 0)
129 free(host->mailboxes);
135 #ifdef MSG_USE_DEPRECATED
136 int MSG_get_host_number(void)
138 return xbt_lib_length(host_lib);
141 m_host_t *MSG_get_host_table(void)
145 xbt_lib_cursor_t cursor;
149 if (xbt_lib_length(host_lib) == 0)
152 array = xbt_new0(void *, xbt_lib_length(host_lib));
154 xbt_lib_foreach(host_lib, cursor, key, data) {
155 if(routing_get_network_element_type(key) == SURF_NETWORK_ELEMENT_HOST)
156 array[i++] = data[MSG_HOST_LEVEL];
159 return (m_host_t *)array;
163 /** \ingroup m_host_management
164 * \brief Return a dynar containing all the hosts declared at a given point of time
166 xbt_dynar_t MSG_hosts_as_dynar(void) {
167 xbt_lib_cursor_t cursor;
170 xbt_dynar_t res = xbt_dynar_new(sizeof(m_host_t),NULL);
172 xbt_lib_foreach(host_lib, cursor, key, data) {
173 if(routing_get_network_element_type(key) == SURF_NETWORK_ELEMENT_HOST)
174 xbt_dynar_push(res, data + MSG_HOST_LEVEL);
179 /** \ingroup m_host_management
180 * \brief Return the number of MSG tasks currently running on a
181 * #m_host_t. The external load is not taken in account.
183 int MSG_get_host_msgload(m_host_t h)
185 xbt_assert((h != NULL), "Invalid parameters");
186 xbt_die( "Not implemented yet");
191 /** \ingroup m_host_management
192 * \brief Return the speed of the processor (in flop/s), regardless of
193 the current load on the machine.
195 double MSG_get_host_speed(m_host_t h)
197 xbt_assert((h != NULL), "Invalid parameters");
199 return (simcall_host_get_speed(h->smx_host));
202 /** \ingroup m_host_management
203 * \brief Returns the value of a given host property
206 * \param name a property name
207 * \return value of a property (or NULL if property not set)
209 const char *MSG_host_get_property_value(m_host_t host, const char *name)
211 return xbt_dict_get_or_null(MSG_host_get_properties(host), name);
214 /** \ingroup m_host_management
215 * \brief Returns a xbt_dynar_t consisting of the list of properties assigned to this host
218 * \return a dict containing the properties
220 xbt_dict_t MSG_host_get_properties(m_host_t host)
222 xbt_assert((host != NULL), "Invalid parameters (host is NULL)");
224 return (simcall_host_get_properties(host->smx_host));
228 /** \ingroup msg_gos_functions
229 * \brief Determine if a host is available.
231 * \param host host to test
232 * \return Returns 1 if host is available, 0 otherwise
234 int MSG_host_is_avail(m_host_t host)
236 xbt_assert((host != NULL), "Invalid parameters (host is NULL)");
237 return (simcall_host_get_state(host->smx_host));