3 /* Copyright (c) 2002,2003,2004 Arnaud Legrand. All rights reserved. */
5 /* This program is free software; you can redistribute it and/or modify it
6 * under the terms of the license (GNU LGPL) which comes with this package. */
10 #include "xbt/error.h"
11 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(m_process, msg,
12 "Logging specific to MSG (process)");
14 /******************************** Process ************************************/
15 /** \ingroup m_process_management
16 * \brief Creates and runs a new #m_process_t.
18 * Does exactly the same as #MSG_process_create_with_arguments but without
19 providing standard arguments (\a argc, \a argv).
20 * \sa MSG_process_create_with_arguments
22 m_process_t MSG_process_create(const char *name,
23 m_process_code_t code, void *data,
26 return MSG_process_create_with_arguments(name, code, data, host, -1, NULL);
29 static void MSG_process_cleanup(void *arg)
32 PAJE_PROCESS_FREE(arg);
34 while(((m_process_t)arg)->simdata->paje_state) {
35 PAJE_PROCESS_POP_STATE((m_process_t)arg);
38 xbt_fifo_remove(msg_global->process_list, arg);
39 xbt_fifo_remove(msg_global->process_to_run, arg);
40 xbt_fifo_remove(((m_process_t) arg)->simdata->host->simdata->process_list, arg);
41 xbt_free(((m_process_t) arg)->name);
42 xbt_free(((m_process_t) arg)->simdata);
46 /** \ingroup m_process_management
47 * \brief Creates and runs a new #m_process_t.
49 * A constructor for #m_process_t taking four arguments and returning the
50 * corresponding object. The structure (and the corresponding thread) is
51 * created, and put in the list of ready process.
52 * \param name a name for the object. It is for user-level information
54 * \param code is a function describing the behavior of the agent. It
55 should then only use functions described in \ref
56 m_process_management (to create a new #m_process_t for example),
57 in \ref m_host_management (only the read-only functions i.e. whose
58 name contains the word get), in \ref m_task_management (to create
59 or destroy some #m_task_t for example) and in \ref
60 msg_gos_functions (to handle file transfers and task processing).
61 * \param data a pointer to any data may want to attach to the new
62 object. It is for user-level information and can be NULL. It can
63 be retrieved with the function \ref MSG_process_get_data.
64 * \param host the location where the new agent is executed.
65 * \param argc first argument passed to \a code
66 * \param argv second argument passed to \a code
68 * \return The new corresponding object.
70 m_process_t MSG_process_create_with_arguments(const char *name,
71 m_process_code_t code, void *data,
72 m_host_t host, int argc, char **argv)
74 simdata_process_t simdata = xbt_new0(s_simdata_process_t,1);
75 m_process_t process = xbt_new0(s_m_process_t,1);
76 m_process_t self = NULL;
78 xbt_assert0(((code != NULL) && (host != NULL)), "Invalid parameters");
81 simdata->PID = msg_global->PID++;
83 simdata->waiting_task = NULL;
86 simdata->context = xbt_context_new(code, NULL, NULL,
87 MSG_process_cleanup, process,
88 simdata->argc, simdata->argv);
90 if((self=msg_global->current_process)) {
91 simdata->PPID = MSG_process_get_PID(self);
95 simdata->last_errno=MSG_OK;
98 /* Process structure */
99 process->name = xbt_strdup(name);
100 process->simdata = simdata;
101 process->data = data;
103 xbt_fifo_push(host->simdata->process_list, process);
105 /* /////////////// FIX du current_process !!! ////////////// */
106 self = msg_global->current_process;
107 xbt_context_start(process->simdata->context);
108 msg_global->current_process = self;
110 xbt_fifo_push(msg_global->process_list, process);
111 xbt_fifo_push(msg_global->process_to_run, process);
113 PAJE_PROCESS_NEW(process);
118 /** \ingroup m_process_management
119 * \param process poor victim
121 * This function simply kills a \a process... scarry isn't it ? :)
123 void MSG_process_kill(m_process_t process)
126 simdata_process_t p_simdata = process->simdata;
127 simdata_host_t h_simdata= p_simdata->host->simdata;
129 /* fprintf(stderr,"Killing %s(%d) on %s.\n",process->name, */
130 /* p_simdata->PID,p_simdata->host->name); */
132 for (i=0; i<msg_global->max_channel; i++) {
133 if (h_simdata->sleeping[i] == process) {
134 h_simdata->sleeping[i] = NULL;
138 if (i==msg_global->max_channel) {
139 if(p_simdata->waiting_task) {
140 if(p_simdata->waiting_task->simdata->compute)
141 surf_workstation_resource->common_public->
142 action_free(p_simdata->waiting_task->simdata->compute);
143 else if (p_simdata->waiting_task->simdata->comm)
144 surf_workstation_resource->common_public->
145 action_change_state(p_simdata->waiting_task->simdata->comm,SURF_ACTION_FAILED);
147 fprintf(stderr,"UNKNOWN STATUS. Please report this bug.\n");
148 } else { /* Must be trying to put a task somewhere */
149 fprintf(stderr,"UNKNOWN STATUS. Please report this bug.\n");
153 xbt_fifo_remove(msg_global->process_list,process);
154 xbt_context_free(process->simdata->context);
157 /** \ingroup m_process_management
158 * \brief Migrates an agent to another location.
160 * This functions checks whether \a process and \a host are valid pointers
161 and change the value of the #m_host_t on which \a process is running.
163 MSG_error_t MSG_process_change_host(m_process_t process, m_host_t host)
165 simdata_process_t simdata = NULL;
169 xbt_assert0(((process) && (process->simdata)
170 && (host)), "Invalid parameters");
171 simdata = process->simdata;
173 xbt_fifo_remove(simdata->host->simdata->process_list,process);
174 simdata->host = host;
175 xbt_fifo_push(host->simdata->process_list,process);
180 /** \ingroup m_process_management
181 * \brief Return the user data of a #m_process_t.
183 * This functions checks whether \a process is a valid pointer or not
184 and return the user data associated to \a process if it is possible.
186 void *MSG_process_get_data(m_process_t process)
188 xbt_assert0((process != NULL), "Invalid parameters");
190 return (process->data);
193 /** \ingroup m_process_management
194 * \brief Set the user data of a #m_process_t.
196 * This functions checks whether \a process is a valid pointer or not
197 and set the user data associated to \a process if it is possible.
199 MSG_error_t MSG_process_set_data(m_process_t process,void *data)
201 xbt_assert0((process != NULL), "Invalid parameters");
202 xbt_assert0((process->data == NULL), "Data already set");
204 process->data = data;
209 /** \ingroup m_process_management
210 * \brief Return the location on which an agent is running.
212 * This functions checks whether \a process is a valid pointer or not
213 and return the m_host_t corresponding to the location on which \a
216 m_host_t MSG_process_get_host(m_process_t process)
218 xbt_assert0(((process != NULL) && (process->simdata)), "Invalid parameters");
220 return (((simdata_process_t) process->simdata)->host);
223 /** \ingroup m_process_management
225 * \brief Return a #m_process_t given its PID.
227 * This functions search in the list of all the created m_process_t for a m_process_t
228 whose PID is equal to \a PID. If no host is found, \c NULL is returned.
229 Note that the PID are uniq in the whole simulation, not only on a given host.
231 m_process_t MSG_process_from_PID(int PID)
233 xbt_fifo_item_t i = NULL;
234 m_process_t process = NULL;
236 xbt_fifo_foreach(msg_global->process_list,i,process,m_process_t) {
237 if(MSG_process_get_PID(process) == PID) return process;
242 /** \ingroup m_process_management
243 * \brief Returns the process ID of \a process.
245 * This functions checks whether \a process is a valid pointer or not
248 int MSG_process_get_PID(m_process_t process)
250 xbt_assert0(((process != NULL) && (process->simdata)), "Invalid parameters");
252 return (((simdata_process_t) process->simdata)->PID);
255 /** \ingroup m_process_management
256 * \brief Returns the process ID of the parent of \a process.
258 * This functions checks whether \a process is a valid pointer or not
259 and return its PID. Returns -1 if the agent has not been created by
262 int MSG_process_get_PPID(m_process_t process)
264 xbt_assert0(((process != NULL) && (process->simdata)), "Invalid parameters");
266 return (((simdata_process_t) process->simdata)->PPID);
269 /** \ingroup m_process_management
270 * \brief Return the name of an agent.
272 * This functions checks whether \a process is a valid pointer or not
275 const char *MSG_process_get_name(m_process_t process)
277 xbt_assert0(((process != NULL) && (process->simdata)), "Invalid parameters");
279 return (process->name);
282 /** \ingroup m_process_management
283 * \brief Return the PID of the current agent.
285 * This functions returns the PID of the currently running #m_process_t.
287 int MSG_process_self_PID(void)
289 return (MSG_process_get_PID(MSG_process_self()));
292 /** \ingroup m_process_management
293 * \brief Return the PPID of the current agent.
295 * This functions returns the PID of the parent of the currently
296 * running #m_process_t.
298 int MSG_process_self_PPID(void)
300 return (MSG_process_get_PPID(MSG_process_self()));
303 /** \ingroup m_process_management
304 * \brief Return the current agent.
306 * This functions returns the currently running #m_process_t.
308 m_process_t MSG_process_self(void)
310 return msg_global->current_process;
313 /** \ingroup m_process_management
314 * \brief Suspend the process.
316 * This functions suspend the process by suspending the task on which
317 * it was waiting for the completion.
319 MSG_error_t MSG_process_suspend(m_process_t process)
321 simdata_process_t simdata = NULL;
322 simdata_task_t simdata_task = NULL;
325 xbt_assert0(((process) && (process->simdata)), "Invalid parameters");
327 PAJE_PROCESS_PUSH_STATE(process,"S");
329 if(process!=MSG_process_self()) {
330 simdata = process->simdata;
332 xbt_assert0(simdata->waiting_task,"Process not waiting for anything else. Weird !");
334 simdata_task = simdata->waiting_task->simdata;
336 simdata->suspended = 1;
337 if(simdata->blocked) return MSG_OK;
339 xbt_assert0(((simdata_task->compute)||(simdata_task->comm))&&
340 !((simdata_task->compute)&&(simdata_task->comm)),
341 "Got a problem in deciding which action to choose !");
342 simdata->suspended = 1;
343 if(simdata_task->compute)
344 surf_workstation_resource->common_public->suspend(simdata_task->compute);
346 surf_workstation_resource->common_public->suspend(simdata_task->comm);
348 m_task_t dummy = MSG_TASK_UNINITIALIZED;
349 dummy = MSG_task_create("suspended", 0.0, 0, NULL);
351 simdata = process->simdata;
352 simdata->suspended = 1;
353 __MSG_task_execute(process,dummy);
354 surf_workstation_resource->common_public->suspend(dummy->simdata->compute);
355 __MSG_wait_for_computation(process,dummy);
356 simdata->suspended = 0;
358 MSG_task_destroy(dummy);
363 /** \ingroup m_process_management
364 * \brief Resume a suspended process.
366 * This functions resume a suspended process by resuming the task on
367 * which it was waiting for the completion.
369 MSG_error_t MSG_process_resume(m_process_t process)
371 simdata_process_t simdata = NULL;
372 simdata_task_t simdata_task = NULL;
375 xbt_assert0(((process != NULL) && (process->simdata)), "Invalid parameters");
378 simdata = process->simdata;
381 if(simdata->blocked) {
382 PAJE_PROCESS_POP_STATE(process);
384 simdata->suspended = 0; /* He'll wake up by itself */
388 if(!(simdata->waiting_task)) {
389 xbt_assert0(0,"Process not waiting for anything else. Weird !");
392 simdata_task = simdata->waiting_task->simdata;
395 if(simdata_task->compute) {
396 surf_workstation_resource->common_public->resume(simdata_task->compute);
397 PAJE_PROCESS_POP_STATE(process);
400 PAJE_PROCESS_POP_STATE(process);
401 surf_workstation_resource->common_public->resume(simdata_task->comm);
407 /** \ingroup m_process_management
408 * \brief Returns true if the process is suspended .
410 * This checks whether a process is suspended or not by inspecting the
411 * task on which it was waiting for the completion.
413 int MSG_process_isSuspended(m_process_t process)
415 xbt_assert0(((process != NULL) && (process->simdata)), "Invalid parameters");
417 return (process->simdata->suspended);
420 MSG_error_t __MSG_process_block(void)
422 m_process_t process = MSG_process_self();
424 m_task_t dummy = MSG_TASK_UNINITIALIZED;
425 dummy = MSG_task_create("blocked", 0.0, 0, NULL);
427 PAJE_PROCESS_PUSH_STATE(process,"B");
429 process->simdata->blocked=1;
430 __MSG_task_execute(process,dummy);
431 surf_workstation_resource->common_public->suspend(dummy->simdata->compute);
432 __MSG_wait_for_computation(process,dummy);
433 process->simdata->blocked=0;
435 if(process->simdata->suspended)
436 MSG_process_suspend(process);
438 MSG_task_destroy(dummy);
443 MSG_error_t __MSG_process_unblock(m_process_t process)
445 simdata_process_t simdata = NULL;
446 simdata_task_t simdata_task = NULL;
449 xbt_assert0(((process != NULL) && (process->simdata)), "Invalid parameters");
452 simdata = process->simdata;
453 if(!(simdata->waiting_task)) {
454 xbt_assert0(0,"Process not waiting for anything else. Weird !");
457 simdata_task = simdata->waiting_task->simdata;
459 xbt_assert0(simdata->blocked,"Process not blocked");
461 surf_workstation_resource->common_public->resume(simdata_task->compute);
463 PAJE_PROCESS_POP_STATE(process);
468 int __MSG_process_isBlocked(m_process_t process)
470 xbt_assert0(((process != NULL) && (process->simdata)), "Invalid parameters");
472 return (process->simdata->blocked);