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"
11 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_process, simix,
12 "Logging specific to SIMIX (process)");
13 /** \defgroup m_process_management Management Functions of Agents
14 * \brief This section describes the agent structure of MSG
15 * (#m_process_t) and the functions for managing it.
16 * \htmlonly <!-- DOXYGEN_NAVBAR_LABEL="Agents" --> \endhtmlonly
18 * We need to simulate many independent scheduling decisions, so
19 * the concept of <em>process</em> is at the heart of the
20 * simulator. A process may be defined as a <em>code</em>, with
21 * some <em>private data</em>, executing in a <em>location</em>.
25 /******************************** Process ************************************/
26 /** \ingroup m_process_management
27 * \brief Creates and runs a new #m_process_t.
29 * Does exactly the same as #MSG_process_create_with_arguments but without
30 providing standard arguments (\a argc, \a argv, \a start_time, \a kill_time).
31 * \sa MSG_process_create_with_arguments
33 smx_process_t SIMIX_process_create(const char *name,
34 smx_process_code_t code, void *data,
37 return SIMIX_process_create_with_arguments(name, code, data, host, -1, NULL);
40 static void SIMIX_process_cleanup(void *arg)
42 xbt_swag_remove(arg, simix_global->process_list);
43 xbt_swag_remove(arg, simix_global->process_to_run);
44 xbt_swag_remove(arg, ((smx_process_t) arg)->simdata->host->simdata->process_list);
45 free(((smx_process_t) arg)->name);
46 ((smx_process_t) arg)->name = NULL;
47 free(((smx_process_t) arg)->simdata);
48 ((smx_process_t) arg)->simdata = NULL;
52 /** \ingroup m_process_management
53 * \brief Creates and runs a new #m_process_t.
55 * A constructor for #m_process_t taking four arguments and returning the
56 * corresponding object. The structure (and the corresponding thread) is
57 * created, and put in the list of ready process.
58 * \param name a name for the object. It is for user-level information
60 * \param code is a function describing the behavior of the agent. It
61 should then only use functions described in \ref
62 m_process_management (to create a new #m_process_t for example),
63 in \ref m_host_management (only the read-only functions i.e. whose
64 name contains the word get), in \ref m_task_management (to create
65 or destroy some #m_task_t for example) and in \ref
66 msg_gos_functions (to handle file transfers and task processing).
67 * \param data a pointer to any data one may want to attach to the new
68 object. It is for user-level information and can be NULL. It can
69 be retrieved with the function \ref MSG_process_get_data.
70 * \param host the location where the new agent is executed.
71 * \param argc first argument passed to \a code
72 * \param argv second argument passed to \a code
74 * \return The new corresponding object.
76 smx_process_t SIMIX_process_create_with_arguments(const char *name,
77 smx_process_code_t code, void *data,
78 smx_host_t host, int argc, char **argv)
80 simdata_process_t simdata = xbt_new0(s_simdata_process_t,1);
81 smx_process_t process = xbt_new0(s_smx_process_t,1);
82 smx_process_t self = NULL;
84 xbt_assert0(((code != NULL) && (host != NULL)), "Invalid parameters");
90 simdata->context = xbt_context_new(code, NULL, NULL,
91 SIMIX_process_cleanup, process,
92 simdata->argc, simdata->argv);
94 //simdata->last_errno=SIMIX_OK;
97 /* Process structure */
98 process->name = xbt_strdup(name);
99 process->simdata = simdata;
100 process->data = data;
102 xbt_swag_insert(process, host->simdata->process_list);
104 /* *************** FIX du current_process !!! *************** */
105 self = simix_global->current_process;
106 xbt_context_start(process->simdata->context);
107 simix_global->current_process = self;
109 xbt_swag_insert(process,simix_global->process_list);
110 DEBUG2("Inserting %s(%s) in the to_run list",process->name,
112 xbt_swag_insert(process,simix_global->process_to_run);
117 /** \ingroup m_process_management
118 * \param process poor victim
120 * This function simply kills a \a process... scarry isn't it ? :)
122 void SIMIX_process_kill(smx_process_t process)
125 simdata_process_t p_simdata = process->simdata;
126 //simdata_host_t h_simdata= p_simdata->host->simdata;
128 //smx_process_t proc = NULL;
130 DEBUG2("Killing %s on %s",process->name, p_simdata->host->name);
134 if(p_simdata->waiting_task) {
135 xbt_dynar_foreach(p_simdata->waiting_task->simdata->sleeping,_cursor,proc) {
137 xbt_dynar_remove_at(p_simdata->waiting_task->simdata->sleeping,_cursor,&proc);
139 if(p_simdata->waiting_task->simdata->compute)
140 surf_workstation_resource->common_public->
141 action_free(p_simdata->waiting_task->simdata->compute);
142 else if (p_simdata->waiting_task->simdata->comm) {
143 surf_workstation_resource->common_public->
144 action_change_state(p_simdata->waiting_task->simdata->comm,SURF_ACTION_FAILED);
145 surf_workstation_resource->common_public->
146 action_free(p_simdata->waiting_task->simdata->comm);
148 xbt_die("UNKNOWN STATUS. Please report this bug.");
152 if ((i==msg_global->max_channel) && (process!=MSG_process_self()) &&
153 (!p_simdata->waiting_task)) {
154 xbt_die("UNKNOWN STATUS. Please report this bug.");
157 xbt_swag_remove(process,simix_global->process_to_run);
158 xbt_swag_remove(process,simix_global->process_list);
159 xbt_context_free(process->simdata->context);
161 if(process==SIMIX_process_self()) {
162 /* I just killed myself */
167 /** \ingroup m_process_management
168 * \brief Return the user data of a #m_process_t.
170 * This functions checks whether \a process is a valid pointer or not
171 and return the user data associated to \a process if it is possible.
173 void *SIMIX_process_get_data(smx_process_t process)
175 xbt_assert0((process != NULL), "Invalid parameters");
177 return (process->data);
180 /** \ingroup m_process_management
181 * \brief Set the user data of a #m_process_t.
183 * This functions checks whether \a process is a valid pointer or not
184 and set the user data associated to \a process if it is possible.
186 void SIMIX_process_set_data(smx_process_t process,void *data)
188 xbt_assert0((process != NULL), "Invalid parameters");
189 xbt_assert0((process->data == NULL), "Data already set");
191 process->data = data;
196 /** \ingroup m_process_management
197 * \brief Return the location on which an agent is running.
199 * This functions checks whether \a process is a valid pointer or not
200 and return the m_host_t corresponding to the location on which \a
203 smx_host_t SIMIX_process_get_host(smx_process_t process)
205 xbt_assert0(((process != NULL) && (process->simdata)), "Invalid parameters");
207 return (process->simdata->host);
210 /** \ingroup m_process_management
211 * \brief Return the name of an agent.
213 * This functions checks whether \a process is a valid pointer or not
216 const char *SIMIX_process_get_name(smx_process_t process)
218 xbt_assert0(((process != NULL) && (process->simdata)), "Invalid parameters");
220 return (process->name);
223 /** \ingroup m_process_management
224 * \brief Return the current agent.
226 * This functions returns the currently running #m_process_t.
228 smx_process_t SIMIX_process_self(void)
230 return simix_global ? simix_global->current_process : NULL;
233 /** \ingroup m_process_management
234 * \brief Suspend the process.
236 * This functions suspend the process by suspending the task on which
237 * it was waiting for the completion.
239 void SIMIX_process_suspend(smx_process_t process)
241 simdata_process_t simdata = NULL;
243 xbt_assert0(((process) && (process->simdata)), "Invalid parameters");
245 if(process!=SIMIX_process_self()) {
246 simdata = process->simdata;
248 if (simdata->mutex) {
249 /* process blocked on a mutex, only set suspend=1 */
250 simdata->suspended = 1;
252 else if (simdata->cond){
253 /* process blocked cond, suspend all actions */
255 /* temporaries variables */
260 simdata->suspended = 1;
262 xbt_fifo_foreach(c->actions,i,act, smx_action_t) {
263 surf_workstation_resource->common_public->suspend(act->simdata->surf_action);
267 simdata->suspended = 1;
271 /* process executing, I can create an action and suspend it */
272 process->simdata->suspended = 1;
275 char name[] = "dummy";
277 cond = SIMIX_cond_init();
278 dummy = SIMIX_action_execute(SIMIX_process_get_host(process), name, 0);
279 surf_workstation_resource->common_public->set_priority(dummy->simdata->surf_action,0.0);
280 SIMIX_register_condition_to_action(dummy,cond);
281 SIMIX_register_action_to_condition(dummy,cond);
282 __SIMIX_cond_wait(cond);
283 //SIMIX_action_destroy(dummy);
284 //SIMIX_cond_destroy(cond);
289 /** \ingroup m_process_management
290 * \brief Resume a suspended process.
292 * This functions resume a suspended process by resuming the task on
293 * which it was waiting for the completion.
295 void SIMIX_process_resume(smx_process_t process)
297 simdata_process_t simdata = NULL;
299 xbt_assert0(((process != NULL) && (process->simdata)), "Invalid parameters");
302 if(process == SIMIX_process_self()) {
306 simdata = process->simdata;
308 DEBUG0("Resume process blocked on a mutex");
309 simdata->suspended = 0; /* He'll wake up by itself */
312 else if (simdata->cond) {
313 DEBUG0("Resume process blocked on a conditional");
314 /* temporaries variables */
318 simdata->suspended = 0;
320 xbt_fifo_foreach(c->actions,i,act, smx_action_t) {
321 surf_workstation_resource->common_public->resume(act->simdata->surf_action);
326 simdata->suspended = 0;
327 xbt_swag_insert(process,simix_global->process_to_run);
332 /** \ingroup m_process_management
333 * \brief Returns true if the process is suspended .
335 * This checks whether a process is suspended or not by inspecting the
336 * task on which it was waiting for the completion.
338 int SIMIX_process_is_suspended(smx_process_t process)
340 xbt_assert0(((process != NULL) && (process->simdata)), "Invalid parameters");
342 return (process->simdata->suspended);