1 /* xbt_synchro -- Synchronization virtualized depending on whether we are */
2 /* in simulation or real life (act on simulated processes) */
4 /* This is the simulation implementation, using simix. */
6 /* Copyright (c) 2007, 2008, 2009, 2010. The SimGrid Team.
7 * All rights reserved. */
9 /* This program is free software; you can redistribute it and/or modify it
10 * under the terms of the license (GNU LGPL) which comes with this package. */
14 #include "xbt/synchro.h" /* This module */
16 #include "simgrid/simix.h" /* used implementation */
17 #include "../simix/smx_private.h" /* FIXME */
19 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(xbt_sync, xbt,
20 "Synchronization mechanism");
22 /* the implementation would be cleaner (and faster) with ELF symbol aliasing */
24 typedef struct s_xbt_thread_ {
25 smx_process_t s_process; /* keep this first, gras_socket_im_the_server() does funky transtyping in sg_msg.c */
30 /* stuff to allow other people to wait on me with xbt_thread_join */
31 unsigned joinable:1, done:1;
36 static int xbt_thread_create_wrapper(int argc, char *argv[])
38 smx_process_t self = SIMIX_process_self();
40 (xbt_thread_t) SIMIX_process_self_get_data(self);
41 simcall_process_set_data(self, t->father_data);
42 t->code(t->userparam);
45 xbt_mutex_acquire(t->mutex);
46 xbt_cond_broadcast(t->cond);
47 xbt_mutex_release(t->mutex);
49 xbt_mutex_destroy(t->mutex);
50 xbt_cond_destroy(t->cond);
57 xbt_thread_t xbt_thread_create(const char *name, void_f_pvoid_t code,
58 void *param, int joinable)
60 xbt_thread_t res = xbt_new0(s_xbt_thread_t, 1);
61 res->name = xbt_strdup(name);
62 res->userparam = param;
64 res->father_data = SIMIX_process_self_get_data(SIMIX_process_self());
65 /* char*name = bprintf("%s#%p",SIMIX_process_self_get_name(), param); */
66 simcall_process_create(&res->s_process, name,
67 xbt_thread_create_wrapper, res,
68 SIMIX_host_self_get_name(), -1.0, 0, NULL,
70 res->joinable = joinable;
72 res->cond = xbt_cond_init();
73 res->mutex = xbt_mutex_init();
78 const char *xbt_thread_name(xbt_thread_t t)
83 const char *xbt_thread_self_name(void)
85 xbt_thread_t me = xbt_thread_self();
86 return me ? me->name : "maestro";
90 void xbt_thread_join(xbt_thread_t thread)
92 xbt_mutex_acquire(thread->mutex);
93 xbt_assert(thread->joinable,
94 "Cannot join on %p: wasn't created joinable", thread);
96 xbt_cond_wait(thread->cond, thread->mutex);
97 xbt_mutex_release(thread->mutex);
100 xbt_mutex_destroy(thread->mutex);
101 xbt_cond_destroy(thread->cond);
107 void xbt_thread_cancel(xbt_thread_t thread)
109 simcall_process_kill(thread->s_process);
114 void xbt_thread_exit()
116 simcall_process_kill(SIMIX_process_self());
119 xbt_thread_t xbt_thread_self(void)
121 return SIMIX_process_self_get_data(SIMIX_process_self());
124 void xbt_thread_yield(void)
126 SIMIX_process_yield(SIMIX_process_self());
129 /****** mutex related functions ******/
130 struct s_xbt_mutex_ {
134 xbt_mutex_t xbt_mutex_init(void)
136 return (xbt_mutex_t) simcall_mutex_init();
139 void xbt_mutex_acquire(xbt_mutex_t mutex)
141 simcall_mutex_lock((smx_mutex_t) mutex);
144 void xbt_mutex_release(xbt_mutex_t mutex)
146 simcall_mutex_unlock((smx_mutex_t) mutex);
149 void xbt_mutex_destroy(xbt_mutex_t mutex)
151 simcall_mutex_destroy((smx_mutex_t) mutex);
154 /***** condition related functions *****/
159 xbt_cond_t xbt_cond_init(void)
161 return (xbt_cond_t) simcall_cond_init();
164 void xbt_cond_wait(xbt_cond_t cond, xbt_mutex_t mutex)
166 simcall_cond_wait((smx_cond_t) cond, (smx_mutex_t) mutex);
169 void xbt_cond_timedwait(xbt_cond_t cond, xbt_mutex_t mutex, double delay)
171 simcall_cond_wait_timeout((smx_cond_t) cond, (smx_mutex_t) mutex, delay);
174 void xbt_cond_signal(xbt_cond_t cond)
176 simcall_cond_signal((smx_cond_t) cond);
179 void xbt_cond_broadcast(xbt_cond_t cond)
181 simcall_cond_broadcast((smx_cond_t) cond);
184 void xbt_cond_destroy(xbt_cond_t cond)
186 simcall_cond_destroy((smx_cond_t) cond);