3 /* xbt_synchro -- Synchronization virtualized depending on whether we are */
4 /* in simulation or real life (act on simulated processes) */
6 /* This is the simulation implementation, using simix. */
8 /* Copyright 2006,2007 Malek Cherier, Martin Quinson
9 * All right reserved. */
11 /* This program is free software; you can redistribute it and/or modify it
12 * under the terms of the license (GNU LGPL) which comes with this package. */
16 #include "xbt/synchro.h" /* This module */
18 #include "simix/simix.h" /* used implementation */
19 #include "simix/datatypes.h"
21 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(xbt_sync, xbt,
22 "Synchronization mechanism");
24 /* the implementation would be cleaner (and faster) with ELF symbol aliasing */
26 typedef struct s_xbt_thread_ {
28 smx_process_t s_process;
32 /* stuff to allow other people to wait on me with xbt_thread_join */
33 int joinable:1,done:1;
38 static int xbt_thread_create_wrapper(int argc, char *argv[])
41 (xbt_thread_t) SIMIX_process_get_data(SIMIX_process_self());
42 SIMIX_process_set_data(SIMIX_process_self(), t->father_data);
43 (*t->code) (t->userparam);
46 xbt_mutex_acquire(t->mutex);
47 xbt_cond_broadcast(t->cond);
48 xbt_mutex_release(t->mutex);
50 xbt_mutex_destroy(t->mutex);
51 xbt_cond_destroy(t->cond);
58 xbt_thread_t xbt_thread_create(const char *name, void_f_pvoid_t code,
59 void *param,int joinable)
61 xbt_thread_t res = xbt_new0(s_xbt_thread_t, 1);
62 res->name = xbt_strdup(name);
63 res->userparam = param;
65 res->father_data = SIMIX_process_get_data(SIMIX_process_self());
66 // char*name = bprintf("%s#%p",SIMIX_process_get_name(SIMIX_process_self()), param);
67 res->s_process = SIMIX_process_create(name,
68 xbt_thread_create_wrapper, res,
69 SIMIX_host_get_name(SIMIX_host_self
72 res->joinable = joinable;
74 res->cond = xbt_cond_init();
75 res->mutex = xbt_mutex_init();
80 const char *xbt_thread_name(xbt_thread_t t)
85 const char *xbt_thread_self_name(void)
87 xbt_thread_t me = xbt_thread_self();
88 return me ? me->name : "maestro";
92 void xbt_thread_join(xbt_thread_t thread)
94 xbt_mutex_acquire(thread->mutex);
95 xbt_assert1(thread->joinable,"Cannot join on %p: wasn't created joinable",thread);
97 xbt_cond_wait(thread->cond,thread->mutex);
98 xbt_mutex_release(thread->mutex);
101 xbt_mutex_destroy(thread->mutex);
102 xbt_cond_destroy(thread->cond);
108 void xbt_thread_cancel(xbt_thread_t thread)
110 SIMIX_process_kill(thread->s_process);
115 void xbt_thread_exit()
117 SIMIX_process_kill(SIMIX_process_self());
120 xbt_thread_t xbt_thread_self(void)
122 smx_process_t p = SIMIX_process_self();
123 return p ? SIMIX_process_get_data(p) : NULL;
126 void xbt_thread_yield(void) {
127 SIMIX_process_yield();
130 /****** mutex related functions ******/
131 struct s_xbt_mutex_ {
133 /* KEEP IT IN SYNC WITH src/simix/private.h::struct s_smx_mutex */
134 xbt_swag_t sleeping; /* list of sleeping process */
136 /* KEEP IT IN SYNC WITH src/simix/private.h::struct s_smx_mutex */
140 xbt_mutex_t xbt_mutex_init(void)
142 return (xbt_mutex_t) SIMIX_mutex_init();
145 void xbt_mutex_acquire(xbt_mutex_t mutex)
147 SIMIX_mutex_lock((smx_mutex_t) mutex);
150 void xbt_mutex_release(xbt_mutex_t mutex)
152 SIMIX_mutex_unlock((smx_mutex_t) mutex);
155 void xbt_mutex_destroy(xbt_mutex_t mutex)
157 SIMIX_mutex_destroy((smx_mutex_t) mutex);
160 /***** condition related functions *****/
163 /* KEEP IT IN SYNC WITH src/simix/private.h::struct s_smx_cond */
164 xbt_swag_t sleeping; /* list of sleeping process */
166 xbt_fifo_t actions; /* list of actions */
167 /* KEEP IT IN SYNC WITH src/simix/private.h::struct s_smx_cond */
171 xbt_cond_t xbt_cond_init(void)
173 return (xbt_cond_t) SIMIX_cond_init();
176 void xbt_cond_wait(xbt_cond_t cond, xbt_mutex_t mutex)
178 SIMIX_cond_wait((smx_cond_t) cond, (smx_mutex_t) mutex);
181 void xbt_cond_timedwait(xbt_cond_t cond, xbt_mutex_t mutex, double delay)
183 SIMIX_cond_wait_timeout((smx_cond_t) cond, (smx_mutex_t) mutex, delay);
186 void xbt_cond_signal(xbt_cond_t cond)
188 SIMIX_cond_signal((smx_cond_t) cond);
191 void xbt_cond_broadcast(xbt_cond_t cond)
193 SIMIX_cond_broadcast((smx_cond_t) cond);
196 void xbt_cond_destroy(xbt_cond_t cond)
198 SIMIX_cond_destroy((smx_cond_t) cond);