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 "simgrid/simix.h" /* used implementation */
15 #include "../simix/smx_private.h" /* FIXME */
17 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(xbt_sync, xbt,
18 "Synchronization mechanism");
20 /* the implementation would be cleaner (and faster) with ELF symbol aliasing */
22 typedef struct s_xbt_thread_ {
23 smx_process_t s_process; /* keep this first, gras_socket_im_the_server() does funky transtyping in sg_msg.c */
28 /* stuff to allow other people to wait on me with xbt_thread_join */
29 unsigned joinable:1, done:1;
34 static int xbt_thread_create_wrapper(int argc, char *argv[])
36 smx_process_t self = SIMIX_process_self();
38 (xbt_thread_t) SIMIX_process_self_get_data(self);
39 simcall_process_set_data(self, t->father_data);
40 t->code(t->userparam);
43 xbt_mutex_acquire(t->mutex);
44 xbt_cond_broadcast(t->cond);
45 xbt_mutex_release(t->mutex);
47 xbt_mutex_destroy(t->mutex);
48 xbt_cond_destroy(t->cond);
55 xbt_thread_t xbt_thread_create(const char *name, void_f_pvoid_t code,
56 void *param, int joinable)
58 xbt_thread_t res = xbt_new0(s_xbt_thread_t, 1);
59 res->name = xbt_strdup(name);
60 res->userparam = param;
62 res->father_data = SIMIX_process_self_get_data(SIMIX_process_self());
63 /* char*name = bprintf("%s#%p",SIMIX_process_self_get_name(), param); */
64 simcall_process_create(&res->s_process, name,
65 xbt_thread_create_wrapper, res,
66 SIMIX_host_self_get_name(), -1.0, 0, NULL,
68 res->joinable = joinable;
70 res->cond = xbt_cond_init();
71 res->mutex = xbt_mutex_init();
76 const char *xbt_thread_name(xbt_thread_t t)
81 const char *xbt_thread_self_name(void)
83 xbt_thread_t me = xbt_thread_self();
84 return me ? me->name : "maestro";
88 void xbt_thread_join(xbt_thread_t thread)
90 xbt_mutex_acquire(thread->mutex);
91 xbt_assert(thread->joinable,
92 "Cannot join on %p: wasn't created joinable", thread);
94 xbt_cond_wait(thread->cond, thread->mutex);
95 xbt_mutex_release(thread->mutex);
98 xbt_mutex_destroy(thread->mutex);
99 xbt_cond_destroy(thread->cond);
105 void xbt_thread_cancel(xbt_thread_t thread)
107 simcall_process_kill(thread->s_process);
112 void xbt_thread_exit()
114 simcall_process_kill(SIMIX_process_self());
117 xbt_thread_t xbt_thread_self(void)
119 return SIMIX_process_self_get_data(SIMIX_process_self());
122 void xbt_thread_yield(void)
124 SIMIX_process_yield(SIMIX_process_self());
127 /****** mutex related functions ******/
128 struct s_xbt_mutex_ {
132 xbt_mutex_t xbt_mutex_init(void)
134 return (xbt_mutex_t) simcall_mutex_init();
137 void xbt_mutex_acquire(xbt_mutex_t mutex)
139 simcall_mutex_lock((smx_mutex_t) mutex);
142 void xbt_mutex_release(xbt_mutex_t mutex)
144 simcall_mutex_unlock((smx_mutex_t) mutex);
147 void xbt_mutex_destroy(xbt_mutex_t mutex)
149 simcall_mutex_destroy((smx_mutex_t) mutex);
152 /***** condition related functions *****/
157 xbt_cond_t xbt_cond_init(void)
159 return (xbt_cond_t) simcall_cond_init();
162 void xbt_cond_wait(xbt_cond_t cond, xbt_mutex_t mutex)
164 simcall_cond_wait((smx_cond_t) cond, (smx_mutex_t) mutex);
167 void xbt_cond_timedwait(xbt_cond_t cond, xbt_mutex_t mutex, double delay)
169 simcall_cond_wait_timeout((smx_cond_t) cond, (smx_mutex_t) mutex, delay);
172 void xbt_cond_signal(xbt_cond_t cond)
174 simcall_cond_signal((smx_cond_t) cond);
177 void xbt_cond_broadcast(xbt_cond_t cond)
179 simcall_cond_broadcast((smx_cond_t) cond);
182 void xbt_cond_destroy(xbt_cond_t cond)
184 simcall_cond_destroy((smx_cond_t) cond);