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;
60 /** \ingroup msg_easier_life
61 * \brief Traces MSG events in the Paje format.
64 void MSG_paje_output(const char *filename)
68 /** \defgroup m_channel_management Understanding channels
69 * \brief This section briefly describes the channel notion of MSG
72 /** @addtogroup m_channel_management
73 * \htmlonly <!-- DOXYGEN_NAVBAR_LABEL="Channels" --> \endhtmlonly
76 * For convenience, the simulator provides the notion of channel
77 * that is close to the tag notion in MPI. A channel is not a
78 * socket. It doesn't need to be opened neither closed. It rather
79 * corresponds to the ports opened on the different machines.
83 /** \ingroup m_channel_management
84 * \brief Set the number of channel in the simulation.
86 * This function has to be called to fix the number of channel in the
87 simulation before creating any host. Indeed, each channel is
88 represented by a different mailbox on each #m_host_t. This
89 function can then be called only once. This function takes only one
91 * \param number the number of channel in the simulation. It has to be >0
93 MSG_error_t MSG_set_channel_number(int number)
95 xbt_assert0((msg_global)
96 && (msg_global->max_channel == 0),
97 "Channel number already set!");
99 msg_global->max_channel = number;
104 /** \ingroup m_channel_management
105 * \brief Return the number of channel in the simulation.
107 * This function has to be called once the number of channel is fixed. I can't
108 figure out a reason why anyone would like to call this function but nevermind.
109 * \return the number of channel in the simulation.
111 int MSG_get_channel_number(void)
113 xbt_assert0((msg_global)
114 && (msg_global->max_channel != 0),
115 "Channel number not set yet!");
117 return msg_global->max_channel;
120 void __MSG_display_process_status(void)
125 /* FIXME: Yeah, I'll do it in a portable maner one day [Mt] */
128 static void _XBT_CALL inthandler(int ignored)
130 INFO0("CTRL-C pressed. Displaying status and bailing out");
131 __MSG_display_process_status();
135 /** \ingroup msg_simulation
136 * \brief Launch the MSG simulation
138 MSG_error_t MSG_main(void)
140 smx_cond_t cond = NULL;
141 smx_action_t smx_action;
142 xbt_fifo_t actions_done = xbt_fifo_new();
143 xbt_fifo_t actions_failed = xbt_fifo_new();
145 /* Prepare to display some more info when dying on Ctrl-C pressing */
146 signal(SIGINT, inthandler);
148 /* Clean IO before the run */
152 //surf_solve(); /* Takes traces into account. Returns 0.0 */
153 /* xbt_fifo_size(msg_global->process_to_run) */
155 while (SIMIX_solve(actions_done, actions_failed) != -1.0) {
157 while ((smx_action = xbt_fifo_pop(actions_failed))) {
160 DEBUG1("** %s failed **", smx_action->name);
161 while ((cond = xbt_fifo_pop(smx_action->cond_list))) {
162 SIMIX_cond_broadcast(cond);
164 /* action finished, destroy it */
165 // SIMIX_action_destroy(smx_action);
168 while ((smx_action = xbt_fifo_pop(actions_done))) {
170 DEBUG1("** %s done **", smx_action->name);
171 while ((cond = xbt_fifo_pop(smx_action->cond_list))) {
172 SIMIX_cond_broadcast(cond);
174 /* action finished, destroy it */
175 //SIMIX_action_destroy(smx_action);
178 xbt_fifo_free(actions_failed);
179 xbt_fifo_free(actions_done);
183 /** \ingroup msg_simulation
184 * \brief Kill all running process
186 * \param reset_PIDs should we reset the PID numbers. A negative
187 * number means no reset and a positive number will be used to set the PID
188 * of the next newly created process.
190 int MSG_process_killall(int reset_PIDs)
192 m_process_t p = NULL;
193 m_process_t self = MSG_process_self();
195 while ((p = xbt_fifo_pop(msg_global->process_list))) {
200 if (reset_PIDs > 0) {
201 msg_global->PID = reset_PIDs;
202 msg_global->session++;
205 return msg_global->PID;
209 /** \ingroup msg_simulation
210 * \brief Clean the MSG simulation
212 MSG_error_t MSG_clean(void)
214 xbt_fifo_item_t i = NULL;
216 m_process_t p = NULL;
219 while ((p = xbt_fifo_pop(msg_global->process_list))) {
223 xbt_fifo_foreach(msg_global->host, i, h, m_host_t) {
224 __MSG_host_destroy(h);
226 xbt_fifo_free(msg_global->host);
227 xbt_fifo_free(msg_global->process_list);
236 /** \ingroup msg_easier_life
237 * \brief A clock (in second).
239 double MSG_get_clock(void)
241 return SIMIX_get_clock();