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 "xbt/virtu.h"
14 #include "xbt/ex.h" /* ex_backtrace_display */
16 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(msg_kernel, msg,
17 "Logging specific to MSG (kernel)");
19 MSG_Global_t msg_global = NULL;
22 /** \defgroup msg_simulation MSG simulation Functions
23 * \brief This section describes the functions you need to know to
24 * set up a simulation. You should have a look at \ref MSG_examples
25 * to have an overview of their usage.
27 /** @addtogroup msg_simulation
28 * \htmlonly <!-- DOXYGEN_NAVBAR_LABEL="Simulation functions" --> \endhtmlonly
31 /********************************* MSG **************************************/
33 /** \ingroup msg_simulation
34 * \brief Initialize some MSG internal data.
36 void MSG_global_init_args(int *argc, char **argv)
38 MSG_global_init(argc, argv);
41 /** \ingroup msg_simulation
42 * \brief Initialize some MSG internal data.
44 void MSG_global_init(int *argc, char **argv)
46 xbt_getpid = &MSG_process_self_PID;
48 SIMIX_global_init(argc, argv);
50 msg_global = xbt_new0(s_MSG_Global_t, 1);
52 msg_global->host = xbt_fifo_new();
53 msg_global->process_list = xbt_fifo_new();
54 msg_global->max_channel = 0;
57 SIMIX_function_register_process_create(_MSG_process_create_from_SIMIX);
58 SIMIX_function_register_process_cleanup(__MSG_process_cleanup);
59 SIMIX_function_register_process_kill(_MSG_process_kill_from_SIMIX);
64 /** \ingroup msg_easier_life
65 * \brief Traces MSG events in the Paje format.
68 void MSG_paje_output(const char *filename)
72 /** \defgroup m_channel_management Understanding channels
73 * \brief This section briefly describes the channel notion of MSG
76 /** @addtogroup m_channel_management
77 * \htmlonly <!-- DOXYGEN_NAVBAR_LABEL="Channels" --> \endhtmlonly
80 * For convenience, the simulator provides the notion of channel
81 * that is close to the tag notion in MPI. A channel is not a
82 * socket. It doesn't need to be opened neither closed. It rather
83 * corresponds to the ports opened on the different machines.
87 /** \ingroup m_channel_management
88 * \brief Set the number of channel in the simulation.
90 * This function has to be called to fix the number of channel in the
91 simulation before creating any host. Indeed, each channel is
92 represented by a different mailbox on each #m_host_t. This
93 function can then be called only once. This function takes only one
95 * \param number the number of channel in the simulation. It has to be >0
97 MSG_error_t MSG_set_channel_number(int number)
99 xbt_assert0((msg_global)
100 && (msg_global->max_channel == 0),
101 "Channel number already set!");
103 msg_global->max_channel = number;
108 /** \ingroup m_channel_management
109 * \brief Return the number of channel in the simulation.
111 * This function has to be called once the number of channel is fixed. I can't
112 figure out a reason why anyone would like to call this function but nevermind.
113 * \return the number of channel in the simulation.
115 int MSG_get_channel_number(void)
117 xbt_assert0((msg_global)
118 && (msg_global->max_channel != 0),
119 "Channel number not set yet!");
121 return msg_global->max_channel;
124 void __MSG_display_process_status(void)
129 /* FIXME: Yeah, I'll do it in a portable maner one day [Mt] */
132 static void _XBT_CALL inthandler(int ignored)
134 INFO0("CTRL-C pressed. Displaying status and bailing out");
135 __MSG_display_process_status();
139 /** \ingroup msg_simulation
140 * \brief Launch the MSG simulation
142 MSG_error_t MSG_main(void)
144 smx_cond_t cond = NULL;
145 smx_action_t smx_action;
146 xbt_fifo_t actions_done = xbt_fifo_new();
147 xbt_fifo_t actions_failed = xbt_fifo_new();
149 /* Prepare to display some more info when dying on Ctrl-C pressing */
150 signal(SIGINT, inthandler);
152 /* Clean IO before the run */
156 //surf_solve(); /* Takes traces into account. Returns 0.0 */
157 /* xbt_fifo_size(msg_global->process_to_run) */
159 while (SIMIX_solve(actions_done, actions_failed) != -1.0) {
161 while ((smx_action = xbt_fifo_pop(actions_failed))) {
164 DEBUG1("** %s failed **", smx_action->name);
165 while ((cond = xbt_fifo_pop(smx_action->cond_list))) {
166 SIMIX_cond_broadcast(cond);
168 /* action finished, destroy it */
169 // SIMIX_action_destroy(smx_action);
172 while ((smx_action = xbt_fifo_pop(actions_done))) {
174 DEBUG1("** %s done **", smx_action->name);
175 while ((cond = xbt_fifo_pop(smx_action->cond_list))) {
176 SIMIX_cond_broadcast(cond);
178 /* action finished, destroy it */
179 //SIMIX_action_destroy(smx_action);
182 xbt_fifo_free(actions_failed);
183 xbt_fifo_free(actions_done);
187 /** \ingroup msg_simulation
188 * \brief Kill all running process
190 * \param reset_PIDs should we reset the PID numbers. A negative
191 * number means no reset and a positive number will be used to set the PID
192 * of the next newly created process.
194 int MSG_process_killall(int reset_PIDs)
196 m_process_t p = NULL;
197 m_process_t self = MSG_process_self();
199 while ((p = xbt_fifo_pop(msg_global->process_list))) {
204 if (reset_PIDs > 0) {
205 msg_global->PID = reset_PIDs;
206 msg_global->session++;
209 return msg_global->PID;
213 /** \ingroup msg_simulation
214 * \brief Clean the MSG simulation
216 MSG_error_t MSG_clean(void)
218 xbt_fifo_item_t i = NULL;
220 m_process_t p = NULL;
223 while ((p = xbt_fifo_pop(msg_global->process_list))) {
227 xbt_fifo_foreach(msg_global->host, i, h, m_host_t) {
228 __MSG_host_destroy(h);
230 xbt_fifo_free(msg_global->host);
231 xbt_fifo_free(msg_global->process_list);
241 /** \ingroup msg_easier_life
242 * \brief A clock (in second).
244 double MSG_get_clock(void)
246 return SIMIX_get_clock();