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. */
9 #include "xbt/sysdep.h"
12 #include "msg/mailbox.h"
14 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_process, simix,
15 "Logging specific to SIMIX (process)");
17 /******************************** Process ************************************/
19 * \brief Creates and runs a new #smx_process_t.
21 * Does exactly the same as #SIMIX_process_create_with_arguments but without
22 providing standard arguments (\a argc, \a argv).
23 * \see SIMIX_process_create_with_arguments
27 void SIMIX_process_cleanup(void *arg)
29 xbt_swag_remove(arg, simix_global->process_list);
30 xbt_swag_remove(arg, simix_global->process_to_run);
32 ((smx_process_t) arg)->simdata->smx_host->
33 simdata->process_list);
34 free(((smx_process_t) arg)->name);
35 ((smx_process_t) arg)->name = NULL;
37 free(((smx_process_t) arg)->simdata);
38 ((smx_process_t) arg)->simdata = NULL;
43 * \brief Creates and runs a new #smx_process_t.
45 * A constructor for #m_process_t taking four arguments and returning the corresponding object. The structure (and the corresponding thread) is created, and put in the list of ready process.
47 * \param name a name for the object. It is for user-level information and can be NULL.
48 * \param data a pointer to any data one may want to attach to the new object. It is for user-level information and can be NULL. It can be retrieved with the function \ref MSG_process_get_data.
49 * \param host the location where the new agent is executed.
50 * \param argc first argument passed to \a code
51 * \param argv second argument passed to \a code
52 * \param clean_process_function The cleanup function of user process. It will be called when the process finish. This function have to call the SIMIX_process_cleanup.
54 * \return The new corresponding object.
56 smx_process_t SIMIX_process_create(const char *name,
57 xbt_main_func_t code, void *data,
58 const char *hostname, int argc,
59 char **argv, xbt_dict_t properties)
61 smx_simdata_process_t simdata = NULL;
62 smx_process_t process = NULL;
63 smx_process_t self = NULL;
64 smx_host_t host = SIMIX_host_get_by_name(hostname);
66 if (!SIMIX_host_get_state(host)) {
67 WARN2("Cannot launch process '%s' on failed host '%s'", name, hostname);
70 simdata = xbt_new0(s_smx_simdata_process_t, 1);
71 process = xbt_new0(s_smx_process_t, 1);
72 /*char alias[MAX_ALIAS_NAME + 1] = {0};
73 msg_mailbox_t mailbox; */
75 xbt_assert0(((code != NULL) && (host != NULL)), "Invalid parameters");
78 simdata->smx_host = host;
79 simdata->mutex = NULL;
83 simdata->context = xbt_context_new(name, code, NULL, NULL,
84 simix_global->cleanup_process_function,
85 process, simdata->argc, simdata->argv);
87 /* Process structure */
88 process->name = xbt_strdup(name);
89 process->simdata = simdata;
93 simdata->properties = properties;
95 xbt_swag_insert(process, host->simdata->process_list);
97 /* fix current_process, about which xbt_context_start mocks around */
98 self = simix_global->current_process;
99 xbt_context_start(process->simdata->context);
100 simix_global->current_process = self;
102 xbt_swag_insert(process, simix_global->process_list);
103 DEBUG2("Inserting %s(%s) in the to_run list", process->name, host->name);
104 xbt_swag_insert(process, simix_global->process_to_run);
106 /*sprintf(alias,"%s:%s",hostname,process->name);
108 mailbox = MSG_mailbox_new(alias);
109 MSG_mailbox_set_hostname(mailbox, hostname); */
115 * \brief Creates and runs a new #smx_process_t hosting a JAVA thread
117 * Warning: this should only be used in libsimgrid4java, since it create
118 * a context with no code, which leads to segfaults in plain libsimgrid
120 void SIMIX_jprocess_create(const char *name, smx_host_t host,
122 void *jprocess, void *jenv, smx_process_t * res)
124 smx_simdata_process_t simdata = xbt_new0(s_smx_simdata_process_t, 1);
125 smx_process_t process = xbt_new0(s_smx_process_t, 1);
126 smx_process_t self = NULL;
128 /* HACK: We need this trick because when we xbt_context_new() do
129 syncronization stuff, the s_process field in the m_process needs
130 to have a valid value, and we call xbt_context_new() before
131 returning, of course, ie, before providing a right value to the
132 caller (Java_simgrid_msg_Msg_processCreate) have time to store it
133 in place. This way, we initialize the m_process->simdata->s_process
136 All this would be much simpler if the synchronization stuff would be done
137 in the JAVA world, I think.
143 DEBUG5("jprocess_create(name=%s,host=%p,data=%p,jproc=%p,jenv=%p)",
144 name, host, data, jprocess, jenv);
145 xbt_assert0(host, "Invalid parameters");
147 simdata->smx_host = host;
148 simdata->mutex = NULL;
149 simdata->cond = NULL;
151 simdata->argv = NULL;
154 simdata->context = xbt_context_new(name, NULL, NULL, jprocess,
155 simix_global->cleanup_process_function,
157 /* argc/argv */ 0, NULL);
159 /* Process structure */
160 process->name = xbt_strdup(name);
161 process->simdata = simdata;
162 process->data = data;
164 xbt_swag_insert(process, host->simdata->process_list);
166 /* fix current_process, about which xbt_context_start mocks around */
167 self = simix_global->current_process;
169 xbt_context_start(process->simdata->context);
171 simix_global->current_process = self;
173 xbt_swag_insert(process, simix_global->process_list);
174 DEBUG2("Inserting %s(%s) in the to_run list", process->name, host->name);
175 xbt_swag_insert(process, simix_global->process_to_run);
180 /** \brief Kill a SIMIX process
182 * This function simply kills a \a process... scarry isn't it ? :).
183 * \param process poor victim
186 void SIMIX_process_kill(smx_process_t process)
188 smx_simdata_process_t p_simdata = process->simdata;
190 DEBUG2("Killing process %s on %s", process->name,
191 p_simdata->smx_host->name);
193 /* Cleanup if we were waiting for something */
194 if (p_simdata->mutex)
195 xbt_swag_remove(process, p_simdata->mutex->sleeping);
198 xbt_swag_remove(process, p_simdata->cond->sleeping);
200 xbt_swag_remove(process, simix_global->process_to_run);
201 xbt_swag_remove(process, simix_global->process_list);
202 DEBUG2("%p here! killing %p", simix_global->current_process, process);
203 xbt_context_kill(process->simdata->context);
205 if (process == SIMIX_process_self()) {
206 /* I just killed myself */
212 * \brief Return the user data of a #smx_process_t.
214 * This functions checks whether \a process is a valid pointer or not and return the user data associated to \a process if it is possible.
215 * \param process SIMIX process
216 * \return A void pointer to the user data
218 void *SIMIX_process_get_data(smx_process_t process)
220 xbt_assert0((process != NULL), "Invalid parameters");
222 return (process->data);
226 * \brief Set the user data of a #m_process_t.
228 * This functions checks whether \a process is a valid pointer or not and set the user data associated to \a process if it is possible.
229 * \param process SIMIX process
230 * \param data User data
232 void SIMIX_process_set_data(smx_process_t process, void *data)
234 xbt_assert0((process != NULL), "Invalid parameters");
235 //xbt_assert0((process->data == NULL), "Data already set");
237 process->data = data;
243 * \brief Return the location on which an agent is running.
245 * This functions checks whether \a process is a valid pointer or not and return the m_host_t corresponding to the location on which \a process is running.
246 * \param process SIMIX process
249 smx_host_t SIMIX_process_get_host(smx_process_t process)
251 xbt_assert0(((process != NULL)
252 && (process->simdata)), "Invalid parameters");
254 return (process->simdata->smx_host);
258 * \brief Return the name of an agent.
260 * This functions checks whether \a process is a valid pointer or not and return its name.
261 * \param process SIMIX process
262 * \return The process name
264 const char *SIMIX_process_get_name(smx_process_t process)
266 xbt_assert0(((process != NULL)
267 && (process->simdata)), "Invalid parameters");
269 return (process->name);
273 * \brief Changes the name of an agent.
275 * This functions checks whether \a process is a valid pointer or not and return its name.
276 * \param process SIMIX process
277 * \param name The new process name
279 void SIMIX_process_set_name(smx_process_t process, char *name)
281 xbt_assert0(((process != NULL)
282 && (process->simdata)), "Invalid parameters");
284 process->name = name;
287 /** \ingroup m_process_management
288 * \brief Return the properties
290 * This functions returns the properties associated with this process
292 xbt_dict_t SIMIX_process_get_properties(smx_process_t process)
294 return process->simdata->properties;
298 * \brief Return the current agent.
300 * This functions returns the currently running #smx_process_t.
301 * \return The SIMIX process
303 smx_process_t SIMIX_process_self(void)
305 return simix_global ? simix_global->current_process : NULL;
309 * \brief Suspend the process.
311 * This functions suspend the process by suspending the action on
312 * which it was waiting for the completion.
314 * \param process SIMIX process
316 void SIMIX_process_suspend(smx_process_t process)
318 smx_simdata_process_t simdata = NULL;
320 xbt_assert0(((process) && (process->simdata)), "Invalid parameters");
322 if (process != SIMIX_process_self()) {
323 simdata = process->simdata;
325 if (simdata->mutex) {
326 /* process blocked on a mutex, only set suspend=1 */
327 simdata->suspended = 1;
328 } else if (simdata->cond) {
329 /* process blocked cond, suspend all actions */
331 /* temporaries variables */
336 simdata->suspended = 1;
338 xbt_fifo_foreach(c->actions, i, act, smx_action_t) {
339 surf_workstation_model->common_public->suspend(act->
340 simdata->surf_action);
343 simdata->suspended = 1;
346 /* process executing, I can create an action and suspend it */
349 char name[] = "dummy";
350 process->simdata->suspended = 1;
352 cond = SIMIX_cond_init();
353 dummy = SIMIX_action_execute(SIMIX_process_get_host(process), name, 0);
354 surf_workstation_model->common_public->suspend(dummy->simdata->
356 SIMIX_register_action_to_condition(dummy, cond);
357 __SIMIX_cond_wait(cond);
358 SIMIX_unregister_action_to_condition(dummy, cond);
359 SIMIX_action_destroy(dummy);
360 SIMIX_cond_destroy(cond);
366 * \brief Resume a suspended process.
368 * This functions resume a suspended process by resuming the task on which it was waiting for the completion.
369 * \param process SIMIX process
371 void SIMIX_process_resume(smx_process_t process)
373 smx_simdata_process_t simdata = NULL;
375 xbt_assert0(((process != NULL)
376 && (process->simdata)), "Invalid parameters");
379 if (process == SIMIX_process_self()) {
383 simdata = process->simdata;
384 if (simdata->mutex) {
385 DEBUG0("Resume process blocked on a mutex");
386 simdata->suspended = 0; /* He'll wake up by itself */
388 } else if (simdata->cond) {
389 /* temporaries variables */
393 DEBUG0("Resume process blocked on a conditional");
394 simdata->suspended = 0;
396 xbt_fifo_foreach(c->actions, i, act, smx_action_t) {
397 surf_workstation_model->common_public->resume(act->simdata->
400 SIMIX_cond_signal(c);
403 simdata->suspended = 0;
404 xbt_swag_insert(process, simix_global->process_to_run);
410 * \brief Migrates an agent to another location.
412 * This function changes the value of the host on which \a process is running.
414 void SIMIX_process_change_host(smx_process_t process, char *source,
417 smx_simdata_process_t p_simdata = process->simdata;
418 smx_host_t h1 = SIMIX_host_get_by_name(source);
419 smx_host_t h2 = SIMIX_host_get_by_name(dest);
420 p_simdata->smx_host = h2;
421 xbt_swag_remove(process, h1->simdata->process_list);
422 xbt_swag_insert(process, h2->simdata->process_list);
426 * \brief Returns true if the process is suspended .
428 * This checks whether a process is suspended or not by inspecting the task on which it was waiting for the completion.
429 * \param process SIMIX process
430 * \return 1, if the process is suspended, else 0.
432 int SIMIX_process_is_suspended(smx_process_t process)
434 xbt_assert0(((process != NULL)
435 && (process->simdata)), "Invalid parameters");
437 return (process->simdata->suspended);