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/ex.h" /* ex_backtrace_display */
15 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(msg_kernel, msg, "Logging specific to MSG (kernel)");
17 MSG_Global_t msg_global = NULL;
20 /** \defgroup msg_simulation MSG simulation Functions
21 * \brief This section describes the functions you need to know to
22 * set up a simulation. You should have a look at \ref MSG_examples
23 * to have an overview of their usage.
25 /** @addtogroup msg_simulation
26 * \htmlonly <!-- DOXYGEN_NAVBAR_LABEL="Simulation functions" --> \endhtmlonly
29 /********************************* MSG **************************************/
31 /** \ingroup msg_simulation
32 * \brief Initialize some MSG internal data.
34 void MSG_global_init_args(int *argc, char **argv)
36 MSG_global_init(argc,argv);
39 /** \ingroup msg_simulation
40 * \brief Initialize some MSG internal data.
42 void MSG_global_init(int *argc, char **argv)
45 SIMIX_global_init(argc, argv);
47 msg_global = xbt_new0(s_MSG_Global_t,1);
49 msg_global->host = xbt_fifo_new();
50 msg_global->process_list = xbt_fifo_new();
51 msg_global->max_channel = 0;
58 /** \ingroup msg_easier_life
59 * \brief Traces MSG events in the Paje format.
62 void MSG_paje_output(const char *filename)
66 /** \defgroup m_channel_management Understanding channels
67 * \brief This section briefly describes the channel notion of MSG
70 /** @addtogroup m_channel_management
71 * \htmlonly <!-- DOXYGEN_NAVBAR_LABEL="Channels" --> \endhtmlonly
74 * For convenience, the simulator provides the notion of channel
75 * that is close to the tag notion in MPI. A channel is not a
76 * socket. It doesn't need to be opened neither closed. It rather
77 * corresponds to the ports opened on the different machines.
81 /** \ingroup m_channel_management
82 * \brief Set the number of channel in the simulation.
84 * This function has to be called to fix the number of channel in the
85 simulation before creating any host. Indeed, each channel is
86 represented by a different mailbox on each #m_host_t. This
87 function can then be called only once. This function takes only one
89 * \param number the number of channel in the simulation. It has to be >0
91 MSG_error_t MSG_set_channel_number(int number)
93 xbt_assert0((msg_global) && (msg_global->max_channel == 0), "Channel number already set!");
95 msg_global->max_channel = number;
100 /** \ingroup m_channel_management
101 * \brief Return the number of channel in the simulation.
103 * This function has to be called once the number of channel is fixed. I can't
104 figure out a reason why anyone would like to call this function but nevermind.
105 * \return the number of channel in the simulation.
107 int MSG_get_channel_number(void)
109 xbt_assert0((msg_global)&&(msg_global->max_channel != 0), "Channel number not set yet!");
111 return msg_global->max_channel;
114 void __MSG_display_process_status(void)
119 /* FIXME: Yeah, I'll do it in a portable maner one day [Mt] */
122 static void _XBT_CALL inthandler(int ignored)
124 INFO0("CTRL-C pressed. Displaying status and bailing out");
125 __MSG_display_process_status();
129 /** \ingroup msg_simulation
130 * \brief Launch the MSG simulation
132 MSG_error_t MSG_main(void)
134 smx_cond_t cond = NULL;
135 smx_action_t smx_action;
136 xbt_fifo_t actions_done = xbt_fifo_new();
137 xbt_fifo_t actions_failed = xbt_fifo_new();
139 /* Prepare to display some more info when dying on Ctrl-C pressing */
140 signal(SIGINT,inthandler);
142 /* Clean IO before the run */
146 //surf_solve(); /* Takes traces into account. Returns 0.0 */
147 /* xbt_fifo_size(msg_global->process_to_run) */
149 while (SIMIX_solve(actions_done, actions_failed) != -1.0) {
151 while ( (smx_action = xbt_fifo_pop(actions_failed)) ) {
154 DEBUG1("** %s failed **",smx_action->name);
155 while ( (cond = xbt_fifo_pop(smx_action->cond_list)) ) {
156 SIMIX_cond_broadcast(cond);
158 /* action finished, destroy it */
159 // SIMIX_action_destroy(smx_action);
162 while ( (smx_action = xbt_fifo_pop(actions_done)) ) {
164 DEBUG1("** %s done **",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 xbt_fifo_free(actions_failed);
173 xbt_fifo_free(actions_done);
177 /** \ingroup msg_simulation
178 * \brief Kill all running process
180 * \param reset_PIDs should we reset the PID numbers. A negative
181 * number means no reset and a positive number will be used to set the PID
182 * of the next newly created process.
184 int MSG_process_killall(long int reset_PIDs)
186 m_process_t p = NULL;
187 m_process_t self = MSG_process_self();
189 while((p=xbt_fifo_pop(msg_global->process_list))) {
190 if(p!=self) MSG_process_kill(p);
194 msg_global->PID = reset_PIDs;
195 msg_global->session++;
198 return msg_global->PID;
202 /** \ingroup msg_simulation
203 * \brief Clean the MSG simulation
205 MSG_error_t MSG_clean(void)
207 xbt_fifo_item_t i = NULL;
209 m_process_t p = NULL;
212 while((p=xbt_fifo_pop(msg_global->process_list))) {
216 xbt_fifo_foreach(msg_global->host,i,h,m_host_t) {
217 __MSG_host_destroy(h);
219 xbt_fifo_free(msg_global->host);
220 xbt_fifo_free(msg_global->process_list);
229 /** \ingroup msg_easier_life
230 * \brief A clock (in second).
232 double MSG_get_clock(void)
234 return SIMIX_get_clock();