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 */
17 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(msg_kernel, msg,
18 "Logging specific to MSG (kernel)");
20 MSG_Global_t msg_global = NULL;
23 /** \defgroup msg_simulation MSG simulation Functions
24 * \brief This section describes the functions you need to know to
25 * set up a simulation. You should have a look at \ref MSG_examples
26 * to have an overview of their usage.
28 /** @addtogroup msg_simulation
29 * \htmlonly <!-- DOXYGEN_NAVBAR_LABEL="Simulation functions" --> \endhtmlonly
32 /********************************* MSG **************************************/
34 /** \ingroup msg_simulation
35 * \brief Initialize some MSG internal data.
37 void MSG_global_init_args(int *argc, char **argv)
39 MSG_global_init(argc, argv);
42 /** \ingroup msg_simulation
43 * \brief Initialize some MSG internal data.
45 void MSG_global_init(int *argc, char **argv)
47 xbt_getpid = MSG_process_self_PID;
49 /* Connect our log channels: that must be done manually under windows */
50 XBT_LOG_CONNECT(msg_gos, msg);
51 XBT_LOG_CONNECT(msg_kernel, msg);
52 XBT_LOG_CONNECT(msg_mailbox, msg);
53 XBT_LOG_CONNECT(msg_process, msg);
55 SIMIX_global_init(argc, argv);
57 msg_global = xbt_new0(s_MSG_Global_t, 1);
59 msg_global->host = xbt_fifo_new();
60 msg_global->process_list = xbt_fifo_new();
61 msg_global->max_channel = 0;
64 /* initialization of the mailbox module */
65 MSG_mailbox_mod_init();
67 SIMIX_function_register_process_create(_MSG_process_create_from_SIMIX);
68 SIMIX_function_register_process_cleanup(__MSG_process_cleanup);
69 SIMIX_function_register_process_kill(_MSG_process_kill_from_SIMIX);
74 /** \ingroup msg_easier_life
75 * \brief Traces MSG events in the Paje format.
78 void MSG_paje_output(const char *filename)
82 /** \defgroup m_channel_management Understanding channels
83 * \brief This section briefly describes the channel notion of MSG
86 /** @addtogroup m_channel_management
87 * \htmlonly <!-- DOXYGEN_NAVBAR_LABEL="Channels" --> \endhtmlonly
90 * For convenience, the simulator provides the notion of channel
91 * that is close to the tag notion in MPI. A channel is not a
92 * socket. It doesn't need to be opened neither closed. It rather
93 * corresponds to the ports opened on the different machines.
97 /** \ingroup m_channel_management
98 * \brief Set the number of channel in the simulation.
100 * This function has to be called to fix the number of channel in the
101 simulation before creating any host. Indeed, each channel is
102 represented by a different mailbox on each #m_host_t. This
103 function can then be called only once. This function takes only one
105 * \param number the number of channel in the simulation. It has to be >0
107 MSG_error_t MSG_set_channel_number(int number)
109 xbt_assert0((msg_global)
110 && (msg_global->max_channel == 0),
111 "Channel number already set!");
113 msg_global->max_channel = number;
118 /** \ingroup m_channel_management
119 * \brief Return the number of channel in the simulation.
121 * This function has to be called once the number of channel is fixed. I can't
122 figure out a reason why anyone would like to call this function but nevermind.
123 * \return the number of channel in the simulation.
125 int MSG_get_channel_number(void)
127 xbt_assert0((msg_global)
128 && (msg_global->max_channel != 0),
129 "Channel number not set yet!");
131 return msg_global->max_channel;
134 void __MSG_display_process_status(void)
139 /* FIXME: Yeah, I'll do it in a portable maner one day [Mt] */
142 static void _XBT_CALL inthandler(int ignored)
144 INFO0("CTRL-C pressed. Displaying status and bailing out");
145 __MSG_display_process_status();
149 /** \ingroup msg_simulation
150 * \brief Launch the MSG simulation
152 MSG_error_t MSG_main(void)
154 smx_cond_t cond = NULL;
155 smx_action_t smx_action;
156 xbt_fifo_t actions_done = xbt_fifo_new();
157 xbt_fifo_t actions_failed = xbt_fifo_new();
159 /* Prepare to display some more info when dying on Ctrl-C pressing */
160 signal(SIGINT, inthandler);
162 /* Clean IO before the run */
166 //surf_solve(); /* Takes traces into account. Returns 0.0 */
167 /* xbt_fifo_size(msg_global->process_to_run) */
169 while (SIMIX_solve(actions_done, actions_failed) != -1.0) {
171 while ((smx_action = xbt_fifo_pop(actions_failed))) {
174 DEBUG1("** %s failed **", 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 while ((smx_action = xbt_fifo_pop(actions_done))) {
184 DEBUG1("** %s done **", smx_action->name);
185 while ((cond = xbt_fifo_pop(smx_action->cond_list))) {
186 SIMIX_cond_broadcast(cond);
188 /* action finished, destroy it */
189 //SIMIX_action_destroy(smx_action);
192 xbt_fifo_free(actions_failed);
193 xbt_fifo_free(actions_done);
197 /** \ingroup msg_simulation
198 * \brief Kill all running process
200 * \param reset_PIDs should we reset the PID numbers. A negative
201 * number means no reset and a positive number will be used to set the PID
202 * of the next newly created process.
204 int MSG_process_killall(int reset_PIDs)
206 m_process_t p = NULL;
207 m_process_t self = MSG_process_self();
209 while ((p = xbt_fifo_pop(msg_global->process_list))) {
214 if (reset_PIDs > 0) {
215 msg_global->PID = reset_PIDs;
216 msg_global->session++;
219 return msg_global->PID;
223 /** \ingroup msg_simulation
224 * \brief Clean the MSG simulation
226 MSG_error_t MSG_clean(void)
228 xbt_fifo_item_t i = NULL;
230 m_process_t p = NULL;
233 while ((p = xbt_fifo_pop(msg_global->process_list))) {
237 xbt_fifo_foreach(msg_global->host, i, h, m_host_t) {
238 __MSG_host_destroy(h);
240 xbt_fifo_free(msg_global->host);
241 xbt_fifo_free(msg_global->process_list);
246 /* cleanup all resources in the mailbox module */
247 MSG_mailbox_mod_exit();
257 /** \ingroup msg_easier_life
258 * \brief A clock (in second).
260 double MSG_get_clock(void)
262 return SIMIX_get_clock();