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"
13 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_process, simix,
14 "Logging specific to SIMIX (process)");
16 /******************************** Process ************************************/
18 * \brief Creates and runs a new #smx_process_t.
20 * Does exactly the same as #SIMIX_process_create_with_arguments but without
21 providing standard arguments (\a argc, \a argv).
22 * \see SIMIX_process_create_with_arguments
26 void SIMIX_process_cleanup(void *arg)
28 xbt_swag_remove(arg, simix_global->process_list);
29 xbt_swag_remove(arg, simix_global->process_to_run);
31 ((smx_process_t) arg)->simdata->smx_host->simdata->
33 free(((smx_process_t) arg)->name);
34 ((smx_process_t) arg)->name = NULL;
36 free(((smx_process_t) arg)->simdata);
37 ((smx_process_t) arg)->simdata = NULL;
42 * \brief Creates and runs a new #smx_process_t.
44 * 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.
46 * \param name a name for the object. It is for user-level information and can be NULL.
47 * \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.
48 * \param host the location where the new agent is executed.
49 * \param argc first argument passed to \a code
50 * \param argv second argument passed to \a code
51 * \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.
53 * \return The new corresponding object.
55 smx_process_t SIMIX_process_create(const char *name,
56 xbt_main_func_t code, void *data,
57 const char *hostname, int argc,
58 char **argv, xbt_dict_t properties)
60 smx_simdata_process_t simdata = xbt_new0(s_smx_simdata_process_t, 1);
61 smx_process_t process = xbt_new0(s_smx_process_t, 1);
62 smx_process_t self = NULL;
63 smx_host_t host = SIMIX_host_get_by_name(hostname);
65 xbt_assert0(((code != NULL) && (host != NULL)), "Invalid parameters");
68 simdata->smx_host = host;
69 simdata->mutex = NULL;
73 simdata->context = xbt_context_new(name,code, NULL, NULL,
75 cleanup_process_function, process,
76 simdata->argc, simdata->argv);
78 /* Process structure */
79 process->name = xbt_strdup(name);
80 process->simdata = simdata;
84 simdata->properties = properties;
86 xbt_swag_insert(process, host->simdata->process_list);
88 /* fix current_process, about which xbt_context_start mocks around */
89 self = simix_global->current_process;
90 xbt_context_start(process->simdata->context);
91 simix_global->current_process = self;
93 xbt_swag_insert(process, simix_global->process_list);
94 DEBUG2("Inserting %s(%s) in the to_run list", process->name, host->name);
95 xbt_swag_insert(process, simix_global->process_to_run);
100 * \brief Creates and runs a new #smx_process_t hosting a JAVA thread
102 * Warning: this should only be used in libsimgrid4java, since it create
103 * a context with no code, which leads to segfaults in plain libsimgrid
105 void SIMIX_jprocess_create(const char *name, smx_host_t host,
107 void *jprocess, void *jenv, smx_process_t * res)
109 smx_simdata_process_t simdata = xbt_new0(s_smx_simdata_process_t, 1);
110 smx_process_t process = xbt_new0(s_smx_process_t, 1);
111 smx_process_t self = NULL;
113 /* HACK: We need this trick because when we xbt_context_new() do
114 syncronization stuff, the s_process field in the m_process needs
115 to have a valid value, and we call xbt_context_new() before
116 returning, of course, ie, before providing a right value to the
117 caller (Java_simgrid_msg_Msg_processCreate) have time to store it
118 in place. This way, we initialize the m_process->simdata->s_process
121 All this would be much simpler if the synchronization stuff would be done
122 in the JAVA world, I think.
128 DEBUG5("jprocess_create(name=%s,host=%p,data=%p,jproc=%p,jenv=%p)",
129 name, host, data, jprocess, jenv);
130 xbt_assert0(host, "Invalid parameters");
132 simdata->smx_host = host;
133 simdata->mutex = NULL;
134 simdata->cond = NULL;
136 simdata->argv = NULL;
138 simdata->context = xbt_context_new(name,NULL, NULL, NULL,
140 cleanup_process_function, process,
141 /* argc/argv */ 0, NULL);
143 /* Process structure */
144 process->name = xbt_strdup(name);
145 process->simdata = simdata;
146 process->data = data;
147 SIMIX_process_set_jprocess(process, jprocess);
148 SIMIX_process_set_jenv(process, jenv);
150 xbt_swag_insert(process, host->simdata->process_list);
152 /* fix current_process, about which xbt_context_start mocks around */
153 self = simix_global->current_process;
154 xbt_context_start(process->simdata->context);
155 simix_global->current_process = self;
157 xbt_swag_insert(process, simix_global->process_list);
158 DEBUG2("Inserting %s(%s) in the to_run list", process->name, host->name);
159 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 smx_simdata_process_t p_simdata = process->simdata;
174 DEBUG2("Killing process %s on %s", process->name,
175 p_simdata->smx_host->name);
177 /* Cleanup if we were waiting for something */
178 if (p_simdata->mutex)
179 xbt_swag_remove(process, p_simdata->mutex->sleeping);
182 xbt_swag_remove(process, p_simdata->cond->sleeping);
184 xbt_swag_remove(process, simix_global->process_to_run);
185 xbt_swag_remove(process, simix_global->process_list);
186 DEBUG2("%p here! killing %p", simix_global->current_process, process);
187 xbt_context_kill(process->simdata->context);
189 if (process == SIMIX_process_self()) {
190 /* I just killed myself */
196 * \brief Return the user data of a #smx_process_t.
198 * 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.
199 * \param process SIMIX process
200 * \return A void pointer to the user data
202 void *SIMIX_process_get_data(smx_process_t process)
204 xbt_assert0((process != NULL), "Invalid parameters");
206 return (process->data);
210 * \brief Set the user data of a #m_process_t.
212 * 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.
213 * \param process SIMIX process
214 * \param data User data
216 void SIMIX_process_set_data(smx_process_t process, void *data)
218 xbt_assert0((process != NULL), "Invalid parameters");
219 //xbt_assert0((process->data == NULL), "Data already set");
221 process->data = data;
227 * \brief Return the location on which an agent is running.
229 * 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.
230 * \param process SIMIX process
233 smx_host_t SIMIX_process_get_host(smx_process_t process)
235 xbt_assert0(((process != NULL)
236 && (process->simdata)), "Invalid parameters");
238 return (process->simdata->smx_host);
242 * \brief Return the name of an agent.
244 * This functions checks whether \a process is a valid pointer or not and return its name.
245 * \param process SIMIX process
246 * \return The process name
248 const char *SIMIX_process_get_name(smx_process_t process)
250 xbt_assert0(((process != NULL)
251 && (process->simdata)), "Invalid parameters");
253 return (process->name);
256 /** \ingroup m_process_management
257 * \brief Return the properties
259 * This functions returns the properties associated with this process
261 xbt_dict_t SIMIX_process_get_properties(smx_process_t process)
263 return process->simdata->properties;
267 * \brief Return the current agent.
269 * This functions returns the currently running #smx_process_t.
270 * \return The SIMIX process
272 smx_process_t SIMIX_process_self(void)
274 return simix_global ? simix_global->current_process : NULL;
278 * \brief Suspend the process.
280 * This functions suspend the process by suspending the action on
281 * which it was waiting for the completion.
283 * \param process SIMIX process
285 void SIMIX_process_suspend(smx_process_t process)
287 smx_simdata_process_t simdata = NULL;
289 xbt_assert0(((process) && (process->simdata)), "Invalid parameters");
291 if (process != SIMIX_process_self()) {
292 simdata = process->simdata;
294 if (simdata->mutex) {
295 /* process blocked on a mutex, only set suspend=1 */
296 simdata->suspended = 1;
297 } else if (simdata->cond) {
298 /* process blocked cond, suspend all actions */
300 /* temporaries variables */
305 simdata->suspended = 1;
307 xbt_fifo_foreach(c->actions, i, act, smx_action_t) {
308 surf_workstation_model->common_public->suspend(act->simdata->
312 simdata->suspended = 1;
315 /* process executing, I can create an action and suspend it */
318 char name[] = "dummy";
319 process->simdata->suspended = 1;
321 cond = SIMIX_cond_init();
322 dummy = SIMIX_action_execute(SIMIX_process_get_host(process), name, 0);
323 surf_workstation_model->common_public->suspend(dummy->simdata->surf_action);
324 SIMIX_register_action_to_condition(dummy, cond);
325 __SIMIX_cond_wait(cond);
326 //SIMIX_action_destroy(dummy);
327 //SIMIX_cond_destroy(cond);
333 * \brief Resume a suspended process.
335 * This functions resume a suspended process by resuming the task on which it was waiting for the completion.
336 * \param process SIMIX process
338 void SIMIX_process_resume(smx_process_t process)
340 smx_simdata_process_t simdata = NULL;
342 xbt_assert0(((process != NULL)
343 && (process->simdata)), "Invalid parameters");
346 if (process == SIMIX_process_self()) {
350 simdata = process->simdata;
351 if (simdata->mutex) {
352 DEBUG0("Resume process blocked on a mutex");
353 simdata->suspended = 0; /* He'll wake up by itself */
355 } else if (simdata->cond) {
356 /* temporaries variables */
360 DEBUG0("Resume process blocked on a conditional");
361 simdata->suspended = 0;
363 xbt_fifo_foreach(c->actions, i, act, smx_action_t) {
364 surf_workstation_model->common_public->resume(act->simdata->surf_action);
366 SIMIX_cond_signal(c);
369 simdata->suspended = 0;
370 xbt_swag_insert(process, simix_global->process_to_run);
376 * \brief Returns true if the process is suspended .
378 * This checks whether a process is suspended or not by inspecting the task on which it was waiting for the completion.
379 * \param process SIMIX process
380 * \return 1, if the process is suspended, else 0.
382 int SIMIX_process_is_suspended(smx_process_t process)
384 xbt_assert0(((process != NULL)
385 && (process->simdata)), "Invalid parameters");
387 return (process->simdata->suspended);
391 /* Helper functions for jMSG: manipulate the context data without breaking the module separation */
392 #include "xbt/context.h" /* to pass java objects from MSG to the context */
394 void SIMIX_process_set_jprocess(smx_process_t process, void *jp)
396 xbt_context_set_jprocess(process->simdata->context, jp);
399 void *SIMIX_process_get_jprocess(smx_process_t process)
401 return xbt_context_get_jprocess(process->simdata->context);
404 void SIMIX_process_set_jenv(smx_process_t process, void *je)
406 xbt_context_set_jenv(process->simdata->context, je);
409 void *SIMIX_process_get_jenv(smx_process_t process)
411 return xbt_context_get_jenv(process->simdata->context);