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 "simix/simix.h" /* used implementation */
17 #include "simix/datatypes.h"
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_ {
26 smx_process_t s_process;
30 /* stuff to allow other people to wait on me with xbt_thread_join */
31 int joinable:1,done:1;
36 static int xbt_thread_create_wrapper(int argc, char *argv[])
39 (xbt_thread_t) SIMIX_process_get_data(SIMIX_process_self());
40 SIMIX_process_set_data(SIMIX_process_self(), t->father_data);
41 (*t->code) (t->userparam);
44 xbt_mutex_acquire(t->mutex);
45 xbt_cond_broadcast(t->cond);
46 xbt_mutex_release(t->mutex);
48 xbt_mutex_destroy(t->mutex);
49 xbt_cond_destroy(t->cond);
56 xbt_thread_t xbt_thread_create(const char *name, void_f_pvoid_t code,
57 void *param,int joinable)
59 xbt_thread_t res = xbt_new0(s_xbt_thread_t, 1);
60 res->name = xbt_strdup(name);
61 res->userparam = param;
63 res->father_data = SIMIX_process_get_data(SIMIX_process_self());
64 // char*name = bprintf("%s#%p",SIMIX_process_get_name(SIMIX_process_self()), param);
65 res->s_process = SIMIX_process_create(name,
66 xbt_thread_create_wrapper, res,
67 SIMIX_host_get_name(SIMIX_host_self
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_assert1(thread->joinable,"Cannot join on %p: wasn't created joinable",thread);
95 xbt_cond_wait(thread->cond,thread->mutex);
96 xbt_mutex_release(thread->mutex);
99 xbt_mutex_destroy(thread->mutex);
100 xbt_cond_destroy(thread->cond);
106 void xbt_thread_cancel(xbt_thread_t thread)
108 SIMIX_process_kill(thread->s_process);
113 void xbt_thread_exit()
115 SIMIX_process_kill(SIMIX_process_self());
118 xbt_thread_t xbt_thread_self(void)
120 smx_process_t p = SIMIX_process_self();
121 return p ? SIMIX_process_get_data(p) : NULL;
124 void xbt_thread_yield(void) {
125 SIMIX_process_yield();
128 /****** mutex related functions ******/
129 struct s_xbt_mutex_ {
131 /* KEEP IT IN SYNC WITH src/simix/private.h::struct s_smx_mutex */
132 xbt_swag_t sleeping; /* list of sleeping process */
134 /* KEEP IT IN SYNC WITH src/simix/private.h::struct s_smx_mutex */
138 xbt_mutex_t xbt_mutex_init(void)
140 return (xbt_mutex_t) SIMIX_mutex_init();
143 void xbt_mutex_acquire(xbt_mutex_t mutex)
145 SIMIX_mutex_lock((smx_mutex_t) mutex);
148 void xbt_mutex_release(xbt_mutex_t mutex)
150 SIMIX_mutex_unlock((smx_mutex_t) mutex);
153 void xbt_mutex_destroy(xbt_mutex_t mutex)
155 SIMIX_mutex_destroy((smx_mutex_t) mutex);
158 /***** condition related functions *****/
161 /* KEEP IT IN SYNC WITH src/simix/private.h::struct s_smx_cond */
162 xbt_swag_t sleeping; /* list of sleeping process */
164 xbt_fifo_t actions; /* list of actions */
165 /* KEEP IT IN SYNC WITH src/simix/private.h::struct s_smx_cond */
169 xbt_cond_t xbt_cond_init(void)
171 return (xbt_cond_t) SIMIX_cond_init();
174 void xbt_cond_wait(xbt_cond_t cond, xbt_mutex_t mutex)
176 SIMIX_cond_wait((smx_cond_t) cond, (smx_mutex_t) mutex);
179 void xbt_cond_timedwait(xbt_cond_t cond, xbt_mutex_t mutex, double delay)
181 SIMIX_cond_wait_timeout((smx_cond_t) cond, (smx_mutex_t) mutex, delay);
184 void xbt_cond_signal(xbt_cond_t cond)
186 SIMIX_cond_signal((smx_cond_t) cond);
189 void xbt_cond_broadcast(xbt_cond_t cond)
191 SIMIX_cond_broadcast((smx_cond_t) cond);
194 void xbt_cond_destroy(xbt_cond_t cond)
196 SIMIX_cond_destroy((smx_cond_t) cond);