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
26 void SIMIX_process_cleanup(void *arg)
28 xbt_swag_remove(arg, simix_global->process_to_run);
29 xbt_swag_remove(arg, simix_global->process_list);
30 xbt_swag_remove(arg, ((smx_process_t)arg)->smx_host->process_list);
31 xbt_swag_insert(arg, simix_global->process_to_destroy);
36 * \brief Creates and runs the maestro process
40 void __SIMIX_create_maestro_process()
42 smx_process_t process = NULL;
43 process = xbt_new0(s_smx_process_t, 1);
46 process->name = (char *)"maestro";
48 /*Create the right context type (FIXME: check the return value for success)*/
49 SIMIX_context_create_maestro(&process);
51 /* Set it as the maestro process */
52 simix_global->maestro_process = process;
53 simix_global->current_process = process;
59 * \brief Creates and runs a new #smx_process_t.
61 * 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.
63 * \param name a name for the object. It is for user-level information and can be NULL.
64 * \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.
65 * \param host the location where the new agent is executed.
66 * \param argc first argument passed to \a code
67 * \param argv second argument passed to \a code
68 * \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.
70 * \return The new corresponding object.
72 smx_process_t SIMIX_process_create(const char *name,
73 xbt_main_func_t code, void *data,
74 const char *hostname, int argc,
75 char **argv, xbt_dict_t properties)
77 smx_process_t process = NULL;
78 smx_process_t self = NULL;
79 smx_host_t host = SIMIX_host_get_by_name(hostname);
81 DEBUG2("Start process %s on host %s", name, hostname);
83 if (!SIMIX_host_get_state(host)) {
84 WARN2("Cannot launch process '%s' on failed host '%s'", name, hostname);
87 process = xbt_new0(s_smx_process_t, 1);
89 xbt_assert0(((code != NULL) && (host != NULL)), "Invalid parameters");
92 process->name = xbt_strdup(name);
93 process->smx_host = host;
96 process->mutex = NULL;
99 /*Create the right context type (FIXME: check the return value for success)*/
100 SIMIX_context_new(&process, code);
102 process->data = data;
103 process->cleanup_func = simix_global->cleanup_process_function;
104 process->cleanup_arg = process;
107 process->properties = properties;
109 /* Add the process to it's host process list */
110 xbt_swag_insert(process, host->process_list);
112 /* fix current_process, about which SIMIX_context_start mocks around */
113 self = simix_global->current_process;
114 SIMIX_context_start(process);
115 simix_global->current_process = self;
117 /* Now insert it in the global process list and in the process to run list */
118 xbt_swag_insert(process, simix_global->process_list);
119 DEBUG2("Inserting %s(%s) in the to_run list", process->name, host->name);
120 xbt_swag_insert(process, simix_global->process_to_run);
126 * \brief Creates and runs a new #smx_process_t hosting a JAVA thread
128 * Warning: this should only be used in libsimgrid4java, since it create
129 * a context with no code, which leads to segfaults in plain libsimgrid
131 void SIMIX_jprocess_create(const char *name, smx_host_t host,
133 void *jprocess, void *jenv, smx_process_t * res)
135 smx_process_t process = xbt_new0(s_smx_process_t, 1);
136 smx_process_t self = NULL;
138 /* HACK: We need this trick because when we xbt_context_new() do
139 syncronization stuff, the s_process field in the m_process needs
140 to have a valid value, and we call xbt_context_new() before
141 returning, of course, ie, before providing a right value to the
142 caller (Java_simgrid_msg_Msg_processCreate) have time to store it
143 in place. This way, we initialize the m_process->simdata->s_process
146 All this would be much simpler if the synchronization stuff would be done
147 in the JAVA world, I think.
151 DEBUG5("jprocess_create(name=%s,host=%p,data=%p,jproc=%p,jenv=%p)",
152 name, host, data, jprocess, jenv);
153 xbt_assert0(host, "Invalid parameters");
156 process->name = xbt_strdup(name);
157 process->smx_host = host;
159 process->argv = NULL;
160 process->mutex = NULL;
161 process->cond = NULL;
162 SIMIX_context_new(&process, jprocess);
163 process->data = data;
165 /* Add the process to it's host process list */
166 xbt_swag_insert(&process, host->process_list);
168 /* fix current_process, about which xbt_context_start mocks around */
169 self = simix_global->current_process;
170 SIMIX_context_start(process);
171 simix_global->current_process = self;
173 /* Now insert it in the global process list and in the process to run list */
174 xbt_swag_insert(process, simix_global->process_list);
175 DEBUG2("Inserting %s(%s) in the to_run list", process->name, host->name);
176 xbt_swag_insert(process, simix_global->process_to_run);
179 /** \brief Kill a SIMIX process
181 * This function simply kills a \a process... scarry isn't it ? :).
182 * \param process poor victim
185 void SIMIX_process_kill(smx_process_t process)
187 DEBUG2("Killing process %s on %s", process->name,
188 process->smx_host->name);
190 /* Cleanup if we were waiting for something */
192 xbt_swag_remove(process, process->mutex->sleeping);
195 xbt_swag_remove(process, process->cond->sleeping);
197 DEBUG2("%p here! killing %p", simix_global->current_process, process);
198 SIMIX_context_kill(process);
200 if (process == SIMIX_process_self()) {
201 /* I just killed myself */
202 SIMIX_context_yield();
207 * \brief Return the user data of a #smx_process_t.
209 * 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.
210 * \param process SIMIX process
211 * \return A void pointer to the user data
213 void *SIMIX_process_get_data(smx_process_t process)
215 xbt_assert0((process != NULL), "Invalid parameters");
217 return (process->data);
221 * \brief Set the user data of a #m_process_t.
223 * 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.
224 * \param process SIMIX process
225 * \param data User data
227 void SIMIX_process_set_data(smx_process_t process, void *data)
229 xbt_assert0((process != NULL), "Invalid parameters");
231 process->data = data;
236 * \brief Return the location on which an agent is running.
238 * 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.
239 * \param process SIMIX process
242 smx_host_t SIMIX_process_get_host(smx_process_t process)
244 xbt_assert0((process != NULL), "Invalid parameters");
245 return (process->smx_host);
249 * \brief Return the name of an agent.
251 * This functions checks whether \a process is a valid pointer or not and return its name.
252 * \param process SIMIX process
253 * \return The process name
255 const char *SIMIX_process_get_name(smx_process_t process)
257 xbt_assert0((process != NULL), "Invalid parameters");
258 return (process->name);
262 * \brief Changes the name of an agent.
264 * This functions checks whether \a process is a valid pointer or not and return its name.
265 * \param process SIMIX process
266 * \param name The new process name
268 void SIMIX_process_set_name(smx_process_t process, char *name)
270 xbt_assert0((process != NULL), "Invalid parameters");
271 process->name = name;
274 /** \ingroup m_process_management
275 * \brief Return the properties
277 * This functions returns the properties associated with this process
279 xbt_dict_t SIMIX_process_get_properties(smx_process_t process)
281 return process->properties;
285 * \brief Return the current agent.
287 * This functions returns the currently running #smx_process_t.
288 * \return The SIMIX process
290 smx_process_t SIMIX_process_self(void)
292 return simix_global ? simix_global->current_process : NULL;
296 * \brief Suspend the process.
298 * This functions suspend the process by suspending the action on
299 * which it was waiting for the completion.
301 * \param process SIMIX process
303 void SIMIX_process_suspend(smx_process_t process)
305 xbt_assert0(process, "Invalid parameters");
307 if (process != SIMIX_process_self()) {
309 if (process->mutex) {
310 /* process blocked on a mutex, only set suspend=1 */
311 process->suspended = 1;
312 } else if (process->cond) {
313 /* process blocked cond, suspend all actions */
315 /* temporaries variables */
320 process->suspended = 1;
322 xbt_fifo_foreach(c->actions, i, act, smx_action_t) {
323 surf_workstation_model->suspend(act->surf_action);
326 process->suspended = 1;
329 /* process executing, I can create an action and suspend it */
332 char name[] = "dummy";
333 process->suspended = 1;
335 cond = SIMIX_cond_init();
336 dummy = SIMIX_action_execute(SIMIX_process_get_host(process), name, 0);
337 surf_workstation_model->suspend(dummy->surf_action);
338 SIMIX_register_action_to_condition(dummy, cond);
339 __SIMIX_cond_wait(cond);
340 SIMIX_unregister_action_to_condition(dummy, cond);
341 SIMIX_action_destroy(dummy);
342 SIMIX_cond_destroy(cond);
348 * \brief Resume a suspended process.
350 * This functions resume a suspended process by resuming the task on which it was waiting for the completion.
351 * \param process SIMIX process
353 void SIMIX_process_resume(smx_process_t process)
355 xbt_assert0((process != NULL), "Invalid parameters");
358 if (process == SIMIX_process_self())
361 if (process->mutex) {
362 DEBUG0("Resume process blocked on a mutex");
363 process->suspended = 0; /* It'll wake up by itself when mutex releases */
365 } else if (process->cond) {
366 /* temporaries variables */
370 DEBUG0("Resume process blocked on a conditional");
371 process->suspended = 0;
373 xbt_fifo_foreach(c->actions, i, act, smx_action_t) {
374 surf_workstation_model->resume(act->surf_action);
376 SIMIX_cond_signal(c);
379 process->suspended = 0;
380 xbt_swag_insert(process, simix_global->process_to_run);
385 * \brief Migrates an agent to another location.
387 * This function changes the value of the host on which \a process is running.
389 void SIMIX_process_change_host(smx_process_t process, char *source, char *dest)
391 xbt_assert0((process != NULL), "Invalid parameters");
392 smx_host_t h1 = SIMIX_host_get_by_name(source);
393 smx_host_t h2 = SIMIX_host_get_by_name(dest);
394 process->smx_host = h2;
395 xbt_swag_remove(process, h1->process_list);
396 xbt_swag_insert(process, h2->process_list);
400 * \brief Returns true if the process is suspended .
402 * This checks whether a process is suspended or not by inspecting the task on which it was waiting for the completion.
403 * \param process SIMIX process
404 * \return 1, if the process is suspended, else 0.
406 int SIMIX_process_is_suspended(smx_process_t process)
408 xbt_assert0(((process != NULL), "Invalid parameters");
410 return (process->suspended);
414 * \brief Returns the amount of SIMIX processes in the system
416 * Maestro internal process is not counted, only user code processes are
418 int SIMIX_process_count()
420 return xbt_swag_size(simix_global->process_list);