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);
31 xbt_swag_remove(arg,((smx_process_t) arg)->smx_host->process_list);
32 free(((smx_process_t) arg)->name);
33 ((smx_process_t) arg)->name = NULL;
39 * \brief Creates and runs a new #smx_process_t.
41 * 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.
43 * \param name a name for the object. It is for user-level information and can be NULL.
44 * \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.
45 * \param host the location where the new agent is executed.
46 * \param argc first argument passed to \a code
47 * \param argv second argument passed to \a code
48 * \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.
50 * \return The new corresponding object.
52 smx_process_t SIMIX_process_create(const char *name,
53 xbt_main_func_t code, void *data,
54 const char *hostname, int argc,
55 char **argv, xbt_dict_t properties)
57 smx_process_t process = NULL;
58 smx_process_t self = NULL;
59 smx_host_t host = SIMIX_host_get_by_name(hostname);
61 DEBUG2("Start process %s on host %s", name, hostname);
63 if (!SIMIX_host_get_state(host)) {
64 WARN2("Cannot launch process '%s' on failed host '%s'", name, hostname);
67 process = xbt_new0(s_smx_process_t, 1);
68 /*char alias[MAX_ALIAS_NAME + 1] = {0};
69 msg_mailbox_t mailbox; */
71 xbt_assert0(((code != NULL) && (host != NULL)), "Invalid parameters");
74 process->name = xbt_strdup(name);
75 process->smx_host = host;
78 process->mutex = NULL;
80 process->context = xbt_context_new(name, code, NULL, NULL,
81 simix_global->cleanup_process_function,
82 process, process->argc, process->argv);
86 process->properties = properties;
88 /* Add the process to it's host process list */
89 xbt_swag_insert(process, host->process_list);
91 /* fix current_process, about which xbt_context_start mocks around */
92 self = simix_global->current_process;
93 xbt_context_start(process->context);
94 simix_global->current_process = self;
96 /* Now insert it in the global process list */
97 xbt_swag_insert(process, simix_global->process_list);
98 DEBUG2("Inserting %s(%s) in the to_run list", process->name, host->name);
99 xbt_swag_insert(process, simix_global->process_to_run);
101 /*sprintf(alias,"%s:%s",hostname,process->name);
103 mailbox = MSG_mailbox_new(alias);
104 MSG_mailbox_set_hostname(mailbox, hostname); */
110 * \brief Creates and runs a new #smx_process_t hosting a JAVA thread
112 * Warning: this should only be used in libsimgrid4java, since it create
113 * a context with no code, which leads to segfaults in plain libsimgrid
115 void SIMIX_jprocess_create(const char *name, smx_host_t host,
117 void *jprocess, void *jenv, smx_process_t * res)
119 smx_process_t process = xbt_new0(s_smx_process_t, 1);
120 smx_process_t self = NULL;
122 /* HACK: We need this trick because when we xbt_context_new() do
123 syncronization stuff, the s_process field in the m_process needs
124 to have a valid value, and we call xbt_context_new() before
125 returning, of course, ie, before providing a right value to the
126 caller (Java_simgrid_msg_Msg_processCreate) have time to store it
127 in place. This way, we initialize the m_process->simdata->s_process
130 All this would be much simpler if the synchronization stuff would be done
131 in the JAVA world, I think.
135 DEBUG5("jprocess_create(name=%s,host=%p,data=%p,jproc=%p,jenv=%p)",
136 name, host, data, jprocess, jenv);
137 xbt_assert0(host, "Invalid parameters");
140 process->name = xbt_strdup(name);
141 process->smx_host = host;
143 process->argv = NULL;
144 process->mutex = NULL;
145 process->cond = NULL;
146 process->context = xbt_context_new(name, NULL, NULL, jprocess,
147 simix_global->cleanup_process_function,
149 process->data = data;
151 /* Add the process to it's host process list */
152 xbt_swag_insert(process, host->process_list);
154 /* fix current_process, about which xbt_context_start mocks around */
155 self = simix_global->current_process;
156 xbt_context_start(process->context);
157 simix_global->current_process = self;
159 xbt_swag_insert(process, simix_global->process_list);
160 DEBUG2("Inserting %s(%s) in the to_run list", process->name, host->name);
161 xbt_swag_insert(process, simix_global->process_to_run);
164 /** \brief Kill a SIMIX process
166 * This function simply kills a \a process... scarry isn't it ? :).
167 * \param process poor victim
170 void SIMIX_process_kill(smx_process_t process)
172 DEBUG2("Killing process %s on %s", process->name,
173 process->smx_host->name);
175 /* Cleanup if we were waiting for something */
177 xbt_swag_remove(process, process->mutex->sleeping);
180 xbt_swag_remove(process, process->cond->sleeping);
182 xbt_swag_remove(process, simix_global->process_to_run);
183 xbt_swag_remove(process, simix_global->process_list);
184 DEBUG2("%p here! killing %p", simix_global->current_process, process);
185 xbt_context_kill(process->context);
187 if (process == SIMIX_process_self()) {
188 /* I just killed myself */
194 * \brief Return the user data of a #smx_process_t.
196 * 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.
197 * \param process SIMIX process
198 * \return A void pointer to the user data
200 void *SIMIX_process_get_data(smx_process_t process)
202 xbt_assert0((process != NULL), "Invalid parameters");
204 return (process->data);
208 * \brief Set the user data of a #m_process_t.
210 * 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.
211 * \param process SIMIX process
212 * \param data User data
214 void SIMIX_process_set_data(smx_process_t process, void *data)
216 xbt_assert0((process != NULL), "Invalid parameters");
218 process->data = data;
223 * \brief Return the location on which an agent is running.
225 * 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.
226 * \param process SIMIX process
229 smx_host_t SIMIX_process_get_host(smx_process_t process)
231 xbt_assert0((process != NULL), "Invalid parameters");
232 return (process->smx_host);
236 * \brief Return the name of an agent.
238 * This functions checks whether \a process is a valid pointer or not and return its name.
239 * \param process SIMIX process
240 * \return The process name
242 const char *SIMIX_process_get_name(smx_process_t process)
244 xbt_assert0((process != NULL), "Invalid parameters");
245 return (process->name);
249 * \brief Changes 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 * \param name The new process name
255 void SIMIX_process_set_name(smx_process_t process, char *name)
257 xbt_assert0((process != NULL), "Invalid parameters");
258 process->name = name;
261 /** \ingroup m_process_management
262 * \brief Return the properties
264 * This functions returns the properties associated with this process
266 xbt_dict_t SIMIX_process_get_properties(smx_process_t process)
268 return process->properties;
272 * \brief Return the current agent.
274 * This functions returns the currently running #smx_process_t.
275 * \return The SIMIX process
277 smx_process_t SIMIX_process_self(void)
279 return simix_global ? simix_global->current_process : NULL;
283 * \brief Suspend the process.
285 * This functions suspend the process by suspending the action on
286 * which it was waiting for the completion.
288 * \param process SIMIX process
290 void SIMIX_process_suspend(smx_process_t process)
292 xbt_assert0(process, "Invalid parameters");
294 if (process != SIMIX_process_self()) {
296 if (process->mutex) {
297 /* process blocked on a mutex, only set suspend=1 */
298 process->suspended = 1;
299 } else if (process->cond) {
300 /* process blocked cond, suspend all actions */
302 /* temporaries variables */
307 process->suspended = 1;
309 xbt_fifo_foreach(c->actions, i, act, smx_action_t) {
310 surf_workstation_model->suspend(act->surf_action);
313 process->suspended = 1;
316 /* process executing, I can create an action and suspend it */
319 char name[] = "dummy";
320 process->suspended = 1;
322 cond = SIMIX_cond_init();
323 dummy = SIMIX_action_execute(SIMIX_process_get_host(process), name, 0);
324 surf_workstation_model->suspend(dummy->simdata->surf_action);
325 SIMIX_register_action_to_condition(dummy, cond);
326 __SIMIX_cond_wait(cond);
327 SIMIX_unregister_action_to_condition(dummy, cond);
328 SIMIX_action_destroy(dummy);
329 SIMIX_cond_destroy(cond);
335 * \brief Resume a suspended process.
337 * This functions resume a suspended process by resuming the task on which it was waiting for the completion.
338 * \param process SIMIX process
340 void SIMIX_process_resume(smx_process_t process)
342 xbt_assert0((process != NULL), "Invalid parameters");
345 if (process == SIMIX_process_self())
348 if (process->mutex) {
349 DEBUG0("Resume process blocked on a mutex");
350 process->suspended = 0; /* It'll wake up by itself when mutex releases */
352 } else if (process->cond) {
353 /* temporaries variables */
357 DEBUG0("Resume process blocked on a conditional");
358 process->suspended = 0;
360 xbt_fifo_foreach(c->actions, i, act, smx_action_t) {
361 surf_workstation_model->resume(act->simdata->surf_action);
363 SIMIX_cond_signal(c);
366 process->suspended = 0;
367 xbt_swag_insert(process, simix_global->process_to_run);
372 * \brief Migrates an agent to another location.
374 * This function changes the value of the host on which \a process is running.
376 void SIMIX_process_change_host(smx_process_t process, char *source, char *dest)
378 xbt_assert0((process != NULL), "Invalid parameters");
379 smx_host_t h1 = SIMIX_host_get_by_name(source);
380 smx_host_t h2 = SIMIX_host_get_by_name(dest);
381 process->smx_host = h2;
382 xbt_swag_remove(process, h1->process_list);
383 xbt_swag_insert(process, h2->process_list);
387 * \brief Returns true if the process is suspended .
389 * This checks whether a process is suspended or not by inspecting the task on which it was waiting for the completion.
390 * \param process SIMIX process
391 * \return 1, if the process is suspended, else 0.
393 int SIMIX_process_is_suspended(smx_process_t process)
395 xbt_assert0(((process != NULL), "Invalid parameters");
397 return (process->suspended);
401 * \brief Returns the amount of SIMIX processes in the system
403 * Maestro internal process is not counted, only user code processes are
405 int SIMIX_process_count()
407 return xbt_swag_size(simix_global->process_list);