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 xbt_fifo_remove(msg_global->process_list, arg);
35 xbt_fifo_remove(msg_global->process_to_run, arg);
36 xbt_fifo_remove(((m_process_t) arg)->simdata->host->simdata->process_list, arg);
37 xbt_free(((m_process_t) arg)->name);
38 xbt_free(((m_process_t) arg)->simdata);
42 /** \ingroup m_process_management
43 * \brief Creates and runs a new #m_process_t.
45 * A constructor for #m_process_t taking four arguments and returning the
46 * corresponding object. The structure (and the corresponding thread) is
47 * created, and put in the list of ready process.
48 * \param name a name for the object. It is for user-level information
50 * \param code is a function describing the behavior of the agent. It
51 should then only use functions described in \ref
52 m_process_management (to create a new #m_process_t for example),
53 in \ref m_host_management (only the read-only functions i.e. whose
54 name contains the word get), in \ref m_task_management (to create
55 or destroy some #m_task_t for example) and in \ref
56 msg_gos_functions (to handle file transfers and task processing).
57 * \param data a pointer to any data may want to attach to the new
58 object. It is for user-level information and can be NULL. It can
59 be retrieved with the function \ref MSG_process_get_data.
60 * \param host the location where the new agent is executed.
61 * \param argc first argument passed to \a code
62 * \param argv second argument passed to \a code
64 * \return The new corresponding object.
66 m_process_t MSG_process_create_with_arguments(const char *name,
67 m_process_code_t code, void *data,
68 m_host_t host, int argc, char **argv)
70 simdata_process_t simdata = xbt_new0(s_simdata_process_t,1);
71 m_process_t process = xbt_new0(s_m_process_t,1);
72 m_process_t self = NULL;
74 xbt_assert0(((code != NULL) && (host != NULL)), "Invalid parameters");
77 simdata->PID = msg_global->PID++;
79 simdata->waiting_task = NULL;
82 simdata->context = xbt_context_new(code, NULL, NULL,
83 MSG_process_cleanup, process,
84 simdata->argc, simdata->argv);
86 if((self=msg_global->current_process)) {
87 simdata->PPID = MSG_process_get_PID(self);
91 simdata->last_errno=MSG_OK;
94 /* Process structure */
95 process->name = xbt_strdup(name);
96 process->simdata = simdata;
99 xbt_fifo_push(host->simdata->process_list, process);
101 /* /////////////// FIX du current_process !!! ////////////// */
102 self = msg_global->current_process;
103 xbt_context_start(process->simdata->context);
104 msg_global->current_process = self;
106 xbt_fifo_push(msg_global->process_list, process);
107 xbt_fifo_push(msg_global->process_to_run, process);
109 PAJE_PROCESS_NEW(process);
114 /** \ingroup m_process_management
115 * \param process poor victim
117 * This function simply kills a \a process... scarry isn't it ? :)
119 void MSG_process_kill(m_process_t process)
122 simdata_process_t p_simdata = process->simdata;
123 simdata_host_t h_simdata= p_simdata->host->simdata;
125 /* fprintf(stderr,"Killing %s(%d) on %s.\n",process->name, */
126 /* p_simdata->PID,p_simdata->host->name); */
128 for (i=0; i<msg_global->max_channel; i++) {
129 if (h_simdata->sleeping[i] == process) {
130 h_simdata->sleeping[i] = NULL;
134 if (i==msg_global->max_channel) {
135 if(p_simdata->waiting_task) {
136 if(p_simdata->waiting_task->simdata->compute)
137 surf_workstation_resource->common_public->
138 action_free(p_simdata->waiting_task->simdata->compute);
139 else if (p_simdata->waiting_task->simdata->comm)
140 surf_workstation_resource->common_public->
141 action_change_state(p_simdata->waiting_task->simdata->comm,SURF_ACTION_FAILED);
143 fprintf(stderr,"UNKNOWN STATUS. Please report this bug.\n");
144 } else { /* Must be trying to put a task somewhere */
145 fprintf(stderr,"UNKNOWN STATUS. Please report this bug.\n");
149 xbt_fifo_remove(msg_global->process_list,process);
150 xbt_context_free(process->simdata->context);
153 /** \ingroup m_process_management
154 * \brief Migrates an agent to another location.
156 * This functions checks whether \a process and \a host are valid pointers
157 and change the value of the #m_host_t on which \a process is running.
159 MSG_error_t MSG_process_change_host(m_process_t process, m_host_t host)
161 simdata_process_t simdata = NULL;
165 xbt_assert0(((process) && (process->simdata)
166 && (host)), "Invalid parameters");
167 simdata = process->simdata;
169 xbt_fifo_remove(simdata->host->simdata->process_list,process);
170 simdata->host = host;
171 xbt_fifo_push(host->simdata->process_list,process);
176 /** \ingroup m_process_management
177 * \brief Return the user data of a #m_process_t.
179 * This functions checks whether \a process is a valid pointer or not
180 and return the user data associated to \a process if it is possible.
182 void *MSG_process_get_data(m_process_t process)
184 xbt_assert0((process != NULL), "Invalid parameters");
186 return (process->data);
189 /** \ingroup m_process_management
190 * \brief Set the user data of a #m_process_t.
192 * This functions checks whether \a process is a valid pointer or not
193 and set the user data associated to \a process if it is possible.
195 MSG_error_t MSG_process_set_data(m_process_t process,void *data)
197 xbt_assert0((process != NULL), "Invalid parameters");
198 xbt_assert0((process->data == NULL), "Data already set");
200 process->data = data;
205 /** \ingroup m_process_management
206 * \brief Return the location on which an agent is running.
208 * This functions checks whether \a process is a valid pointer or not
209 and return the m_host_t corresponding to the location on which \a
212 m_host_t MSG_process_get_host(m_process_t process)
214 xbt_assert0(((process != NULL) && (process->simdata)), "Invalid parameters");
216 return (((simdata_process_t) process->simdata)->host);
219 /** \ingroup m_process_management
221 * \brief Return a #m_process_t given its PID.
223 * This functions search in the list of all the created m_process_t for a m_process_t
224 whose PID is equal to \a PID. If no host is found, \c NULL is returned.
225 Note that the PID are uniq in the whole simulation, not only on a given host.
227 m_process_t MSG_process_from_PID(int PID)
229 xbt_fifo_item_t i = NULL;
230 m_process_t process = NULL;
232 xbt_fifo_foreach(msg_global->process_list,i,process,m_process_t) {
233 if(MSG_process_get_PID(process) == PID) return process;
238 /** \ingroup m_process_management
239 * \brief Returns the process ID of \a process.
241 * This functions checks whether \a process is a valid pointer or not
244 int MSG_process_get_PID(m_process_t process)
246 xbt_assert0(((process != NULL) && (process->simdata)), "Invalid parameters");
248 return (((simdata_process_t) process->simdata)->PID);
251 /** \ingroup m_process_management
252 * \brief Returns the process ID of the parent of \a process.
254 * This functions checks whether \a process is a valid pointer or not
255 and return its PID. Returns -1 if the agent has not been created by
258 int MSG_process_get_PPID(m_process_t process)
260 xbt_assert0(((process != NULL) && (process->simdata)), "Invalid parameters");
262 return (((simdata_process_t) process->simdata)->PPID);
265 /** \ingroup m_process_management
266 * \brief Return the name of an agent.
268 * This functions checks whether \a process is a valid pointer or not
271 const char *MSG_process_get_name(m_process_t process)
273 xbt_assert0(((process != NULL) && (process->simdata)), "Invalid parameters");
275 return (process->name);
278 /** \ingroup m_process_management
279 * \brief Return the PID of the current agent.
281 * This functions returns the PID of the currently running #m_process_t.
283 int MSG_process_self_PID(void)
285 return (MSG_process_get_PID(MSG_process_self()));
288 /** \ingroup m_process_management
289 * \brief Return the PPID of the current agent.
291 * This functions returns the PID of the parent of the currently
292 * running #m_process_t.
294 int MSG_process_self_PPID(void)
296 return (MSG_process_get_PPID(MSG_process_self()));
299 /** \ingroup m_process_management
300 * \brief Return the current agent.
302 * This functions returns the currently running #m_process_t.
304 m_process_t MSG_process_self(void)
306 return msg_global->current_process;
309 /** \ingroup m_process_management
310 * \brief Suspend the process.
312 * This functions suspend the process by suspending the task on which
313 * it was waiting for the completion.
315 MSG_error_t MSG_process_suspend(m_process_t process)
317 simdata_process_t simdata = NULL;
318 simdata_task_t simdata_task = NULL;
321 xbt_assert0(((process) && (process->simdata)), "Invalid parameters");
323 PAJE_PROCESS_PUSH_STATE(process,"S");
325 if(process!=MSG_process_self()) {
326 simdata = process->simdata;
328 xbt_assert0(simdata->waiting_task,"Process not waiting for anything else. Weird !");
330 simdata_task = simdata->waiting_task->simdata;
332 simdata->suspended = 1;
333 if(simdata->blocked) return MSG_OK;
335 xbt_assert0(((simdata_task->compute)||(simdata_task->comm))&&
336 !((simdata_task->compute)&&(simdata_task->comm)),
337 "Got a problem in deciding which action to choose !");
338 simdata->suspended = 1;
339 if(simdata_task->compute)
340 surf_workstation_resource->common_public->suspend(simdata_task->compute);
342 surf_workstation_resource->common_public->suspend(simdata_task->comm);
344 m_task_t dummy = MSG_TASK_UNINITIALIZED;
345 dummy = MSG_task_create("suspended", 0.0, 0, NULL);
347 simdata = process->simdata;
348 simdata->suspended = 1;
349 __MSG_task_execute(process,dummy);
350 surf_workstation_resource->common_public->suspend(dummy->simdata->compute);
351 __MSG_wait_for_computation(process,dummy);
352 simdata->suspended = 0;
354 MSG_task_destroy(dummy);
359 /** \ingroup m_process_management
360 * \brief Resume a suspended process.
362 * This functions resume a suspended process by resuming the task on
363 * which it was waiting for the completion.
365 MSG_error_t MSG_process_resume(m_process_t process)
367 simdata_process_t simdata = NULL;
368 simdata_task_t simdata_task = NULL;
371 xbt_assert0(((process != NULL) && (process->simdata)), "Invalid parameters");
374 simdata = process->simdata;
377 if(simdata->blocked) {
378 PAJE_PROCESS_POP_STATE(process);
380 simdata->suspended = 0; /* He'll wake up by itself */
384 if(!(simdata->waiting_task)) {
385 xbt_assert0(0,"Process not waiting for anything else. Weird !");
388 simdata_task = simdata->waiting_task->simdata;
391 if(simdata_task->compute) {
392 surf_workstation_resource->common_public->resume(simdata_task->compute);
393 PAJE_PROCESS_POP_STATE(process);
396 PAJE_PROCESS_POP_STATE(process);
397 surf_workstation_resource->common_public->resume(simdata_task->comm);
403 /** \ingroup m_process_management
404 * \brief Returns true if the process is suspended .
406 * This checks whether a process is suspended or not by inspecting the
407 * task on which it was waiting for the completion.
409 int MSG_process_isSuspended(m_process_t process)
411 xbt_assert0(((process != NULL) && (process->simdata)), "Invalid parameters");
413 return (process->simdata->suspended);
416 MSG_error_t __MSG_process_block(void)
418 m_process_t process = MSG_process_self();
420 m_task_t dummy = MSG_TASK_UNINITIALIZED;
421 dummy = MSG_task_create("blocked", 0.0, 0, NULL);
423 PAJE_PROCESS_PUSH_STATE(process,"B");
425 process->simdata->blocked=1;
426 __MSG_task_execute(process,dummy);
427 surf_workstation_resource->common_public->suspend(dummy->simdata->compute);
428 __MSG_wait_for_computation(process,dummy);
429 process->simdata->blocked=0;
431 if(process->simdata->suspended)
432 MSG_process_suspend(process);
434 MSG_task_destroy(dummy);
439 MSG_error_t __MSG_process_unblock(m_process_t process)
441 simdata_process_t simdata = NULL;
442 simdata_task_t simdata_task = NULL;
445 xbt_assert0(((process != NULL) && (process->simdata)), "Invalid parameters");
448 simdata = process->simdata;
449 if(!(simdata->waiting_task)) {
450 xbt_assert0(0,"Process not waiting for anything else. Weird !");
453 simdata_task = simdata->waiting_task->simdata;
455 xbt_assert0(simdata->blocked,"Process not blocked");
457 surf_workstation_resource->common_public->resume(simdata_task->compute);
459 PAJE_PROCESS_POP_STATE(process);
464 int __MSG_process_isBlocked(m_process_t process)
466 xbt_assert0(((process != NULL) && (process->simdata)), "Invalid parameters");
468 return (process->simdata->blocked);