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 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_process, simix,
13 "Logging specific to SIMIX (process)");
15 /******************************** Process ************************************/
17 * \brief Creates and runs a new #smx_process_t.
19 * Does exactly the same as #SIMIX_process_create_with_arguments but without
20 providing standard arguments (\a argc, \a argv).
21 * \see SIMIX_process_create_with_arguments
25 void SIMIX_process_cleanup(void *arg)
27 xbt_swag_remove(arg, simix_global->process_list);
28 xbt_swag_remove(arg, simix_global->process_to_run);
29 xbt_swag_remove(arg, ((smx_process_t) arg)->simdata->s_host->simdata->process_list);
30 free(((smx_process_t) arg)->name);
31 ((smx_process_t) arg)->name = NULL;
33 free(((smx_process_t) arg)->simdata);
34 ((smx_process_t) arg)->simdata = 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, char **argv)
56 smx_simdata_process_t simdata = xbt_new0(s_smx_simdata_process_t,1);
57 smx_process_t process = xbt_new0(s_smx_process_t,1);
58 smx_process_t self = NULL;
59 smx_host_t host = SIMIX_host_get_by_name(hostname);
61 xbt_assert0(((code != NULL) && (host != NULL)), "Invalid parameters");
64 simdata->s_host = host;
65 simdata->mutex = NULL;
69 simdata->context = xbt_context_new(code, NULL, NULL,
70 simix_global->cleanup_process_function, process,
71 simdata->argc, simdata->argv);
73 /* Process structure */
74 process->name = xbt_strdup(name);
75 process->simdata = simdata;
78 xbt_swag_insert(process, host->simdata->process_list);
80 /* fix current_process, about which xbt_context_start mocks around */
81 self = simix_global->current_process;
82 xbt_context_start(process->simdata->context);
83 simix_global->current_process = self;
85 xbt_swag_insert(process,simix_global->process_list);
86 DEBUG2("Inserting %s(%s) in the to_run list",process->name,
88 xbt_swag_insert(process,simix_global->process_to_run);
94 * \brief Creates and runs a new #smx_process_t hosting a JAVA thread
96 * Warning: this should only be used in libsimgrid4java, since it create
97 * a context with no code, which leads to segfaults in plain libsimgrid
99 void SIMIX_jprocess_create(const char *name, smx_host_t host,
101 void *jprocess, void *jenv,
104 smx_simdata_process_t simdata = xbt_new0(s_smx_simdata_process_t,1);
105 smx_process_t process = xbt_new0(s_smx_process_t,1);
106 smx_process_t self = NULL;
108 /* HACK: We need this trick because when we xbt_context_new() do
109 syncronization stuff, the s_process field in the m_process needs
110 to have a valid value, and we call xbt_context_new() before
111 returning, of course, ie, before providing a right value to the
112 caller (Java_simgrid_msg_Msg_processCreate) have time to store it
113 in place. This way, we initialize the m_process->simdata->s_process
116 All this would be much simpler if the synchronization stuff would be done
117 in the JAVA world, I think.
123 DEBUG5("jprocess_create(name=%s,host=%p,data=%p,jproc=%p,jenv=%p)",
124 name,host,data,jprocess,jenv);
125 xbt_assert0(host, "Invalid parameters");
127 simdata->s_host = host;
128 simdata->mutex = NULL;
129 simdata->cond = NULL;
131 simdata->argv = NULL;
133 simdata->context = xbt_context_new(NULL, NULL, NULL,
134 simix_global->cleanup_process_function, process,
135 /* argc/argv*/0,NULL);
137 /* Process structure */
138 process->name = xbt_strdup(name);
139 process->simdata = simdata;
140 process->data = data;
141 SIMIX_process_set_jprocess(process,jprocess);
142 SIMIX_process_set_jenv(process,jenv);
144 xbt_swag_insert(process, host->simdata->process_list);
146 /* fix current_process, about which xbt_context_start mocks around */
147 self = simix_global->current_process;
148 xbt_context_start(process->simdata->context);
149 simix_global->current_process = self;
151 xbt_swag_insert(process,simix_global->process_list);
152 DEBUG2("Inserting %s(%s) in the to_run list",process->name,
154 xbt_swag_insert(process,simix_global->process_to_run);
159 /** \brief Kill a SIMIX process
161 * This function simply kills a \a process... scarry isn't it ? :).
162 * \param process poor victim
165 void SIMIX_process_kill(smx_process_t process)
167 smx_simdata_process_t p_simdata = process->simdata;
169 DEBUG2("Killing process %s on %s",process->name, p_simdata->s_host->name);
171 /* Cleanup if we were waiting for something */
172 if (p_simdata->mutex)
173 xbt_swag_remove(process,p_simdata->mutex->sleeping);
176 xbt_swag_remove(process,p_simdata->cond->sleeping);
178 xbt_swag_remove(process, simix_global->process_to_run);
179 xbt_swag_remove(process, simix_global->process_list);
180 xbt_context_kill(process->simdata->context);
182 if(process==SIMIX_process_self()) {
183 /* I just killed myself */
189 * \brief Return the user data of a #smx_process_t.
191 * 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.
192 * \param process SIMIX process
193 * \return A void pointer to the user data
195 void *SIMIX_process_get_data(smx_process_t process)
197 xbt_assert0((process != NULL), "Invalid parameters");
199 return (process->data);
203 * \brief Set the user data of a #m_process_t.
205 * 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.
206 * \param process SIMIX process
207 * \param data User data
209 void SIMIX_process_set_data(smx_process_t process,void *data)
211 xbt_assert0((process != NULL), "Invalid parameters");
212 //xbt_assert0((process->data == NULL), "Data already set");
214 process->data = data;
220 * \brief Return the location on which an agent is running.
222 * 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.
223 * \param process SIMIX process
226 smx_host_t SIMIX_process_get_host(smx_process_t process)
228 xbt_assert0(((process != NULL) && (process->simdata)), "Invalid parameters");
230 return (process->simdata->s_host);
234 * \brief Return the name of an agent.
236 * This functions checks whether \a process is a valid pointer or not and return its name.
237 * \param process SIMIX process
238 * \return The process name
240 const char *SIMIX_process_get_name(smx_process_t process)
242 xbt_assert0(((process != NULL) && (process->simdata)), "Invalid parameters");
244 return (process->name);
248 * \brief Return the current agent.
250 * This functions returns the currently running #smx_process_t.
251 * \return The SIMIX process
253 smx_process_t SIMIX_process_self(void)
255 return simix_global ? simix_global->current_process : NULL;
259 * \brief Suspend the process.
261 * This functions suspend the process by suspending the action on which it was waiting for the completion.
262 * \param process SIMIX process
264 void SIMIX_process_suspend(smx_process_t process)
266 smx_simdata_process_t simdata = NULL;
268 xbt_assert0(((process) && (process->simdata)), "Invalid parameters");
270 if(process!=SIMIX_process_self()) {
271 simdata = process->simdata;
273 if (simdata->mutex) {
274 /* process blocked on a mutex, only set suspend=1 */
275 simdata->suspended = 1;
277 else if (simdata->cond){
278 /* process blocked cond, suspend all actions */
280 /* temporaries variables */
285 simdata->suspended = 1;
287 xbt_fifo_foreach(c->actions,i,act, smx_action_t) {
288 surf_workstation_resource->common_public->suspend(act->simdata->surf_action);
292 simdata->suspended = 1;
296 /* process executing, I can create an action and suspend it */
297 process->simdata->suspended = 1;
300 char name[] = "dummy";
302 cond = SIMIX_cond_init();
303 dummy = SIMIX_action_execute(SIMIX_process_get_host(process), name, 0);
304 surf_workstation_resource->common_public->set_priority(dummy->simdata->surf_action,0.0);
305 SIMIX_register_condition_to_action(dummy,cond);
306 SIMIX_register_action_to_condition(dummy,cond);
307 __SIMIX_cond_wait(cond);
308 //SIMIX_action_destroy(dummy);
309 //SIMIX_cond_destroy(cond);
315 * \brief Resume a suspended process.
317 * This functions resume a suspended process by resuming the task on which it was waiting for the completion.
318 * \param process SIMIX process
320 void SIMIX_process_resume(smx_process_t process)
322 smx_simdata_process_t simdata = NULL;
324 xbt_assert0(((process != NULL) && (process->simdata)), "Invalid parameters");
327 if(process == SIMIX_process_self()) {
331 simdata = process->simdata;
333 DEBUG0("Resume process blocked on a mutex");
334 simdata->suspended = 0; /* He'll wake up by itself */
337 else if (simdata->cond) {
338 DEBUG0("Resume process blocked on a conditional");
339 /* temporaries variables */
343 simdata->suspended = 0;
345 xbt_fifo_foreach(c->actions,i,act, smx_action_t) {
346 surf_workstation_resource->common_public->resume(act->simdata->surf_action);
351 simdata->suspended = 0;
352 xbt_swag_insert(process,simix_global->process_to_run);
358 * \brief Returns true if the process is suspended .
360 * This checks whether a process is suspended or not by inspecting the task on which it was waiting for the completion.
361 * \param process SIMIX process
362 * \return 1, if the process is suspended, else 0.
364 int SIMIX_process_is_suspended(smx_process_t process)
366 xbt_assert0(((process != NULL) && (process->simdata)), "Invalid parameters");
368 return (process->simdata->suspended);
372 /* Helper functions for jMSG: manipulate the context data without breaking the module separation */
373 #include "xbt/context.h" /* to pass java objects from MSG to the context */
375 void SIMIX_process_set_jprocess(smx_process_t process, void *jp) {
376 xbt_context_set_jprocess(process->simdata->context,jp);
378 void* SIMIX_process_get_jprocess(smx_process_t process) {
379 return xbt_context_get_jprocess(process->simdata->context);
382 void SIMIX_process_set_jmutex(smx_process_t process, void *jm) {
383 xbt_context_set_jmutex(process->simdata->context,jm);
385 void* SIMIX_process_get_jmutex(smx_process_t process) {
386 return xbt_context_get_jmutex(process->simdata->context);
389 void SIMIX_process_set_jcond(smx_process_t process, void *jc) {
390 xbt_context_set_jcond(process->simdata->context,jc);
392 void* SIMIX_process_get_jcond(smx_process_t process) {
393 return xbt_context_get_jcond(process->simdata->context);
396 void SIMIX_process_set_jenv(smx_process_t process, void *je) {
397 xbt_context_set_jenv(process->simdata->context,je);
399 void* SIMIX_process_get_jenv(smx_process_t process) {
400 return xbt_context_get_jenv(process->simdata->context);