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) 2007-2014. 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. */
13 #include "xbt/synchro_core.h"
15 #include "simgrid/simix.h" /* used implementation */
16 #include "../simix/smx_private.h" /* FIXME */
18 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(xbt_sync, xbt,
19 "Synchronization mechanism");
21 /* the implementation would be cleaner (and faster) with ELF symbol aliasing */
23 typedef struct s_xbt_thread_ {
24 smx_process_t s_process; /* keep this first, gras_socket_im_the_server() does funky transtyping in sg_msg.c */
29 /* stuff to allow other people to wait on me with xbt_thread_join */
30 unsigned joinable:1, done:1;
35 static int xbt_thread_create_wrapper(int argc, char *argv[])
37 smx_process_t self = SIMIX_process_self();
39 (xbt_thread_t) SIMIX_process_self_get_data(self);
40 simcall_process_set_data(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_self_get_data(SIMIX_process_self());
64 /* char*name = bprintf("%s#%p",SIMIX_process_self_get_name(), param); */
65 simcall_process_create(&res->s_process, name,
66 xbt_thread_create_wrapper, res,
67 SIMIX_host_self_get_name(), -1.0, 0, NULL,
69 res->joinable = joinable;
71 res->cond = xbt_cond_init();
72 res->mutex = xbt_mutex_init();
77 const char *xbt_thread_name(xbt_thread_t t)
82 const char *xbt_thread_self_name(void)
84 xbt_thread_t me = xbt_thread_self();
85 return me ? me->name : "maestro";
89 void xbt_thread_join(xbt_thread_t thread)
91 xbt_mutex_acquire(thread->mutex);
92 xbt_assert(thread->joinable,
93 "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 simcall_process_kill(thread->s_process);
113 void xbt_thread_exit()
115 simcall_process_kill(SIMIX_process_self());
118 xbt_thread_t xbt_thread_self(void)
120 return SIMIX_process_self_get_data(SIMIX_process_self());
123 void xbt_thread_yield(void)
125 SIMIX_process_yield(SIMIX_process_self());
128 /****** mutex related functions ******/
129 struct s_xbt_mutex_ {
133 xbt_mutex_t xbt_mutex_init(void)
135 return (xbt_mutex_t) simcall_mutex_init();
138 void xbt_mutex_acquire(xbt_mutex_t mutex)
140 simcall_mutex_lock((smx_mutex_t) mutex);
143 void xbt_mutex_release(xbt_mutex_t mutex)
145 simcall_mutex_unlock((smx_mutex_t) mutex);
148 void xbt_mutex_destroy(xbt_mutex_t mutex)
150 simcall_mutex_destroy((smx_mutex_t) mutex);
153 /***** condition related functions *****/
158 xbt_cond_t xbt_cond_init(void)
160 return (xbt_cond_t) simcall_cond_init();
163 void xbt_cond_wait(xbt_cond_t cond, xbt_mutex_t mutex)
165 simcall_cond_wait((smx_cond_t) cond, (smx_mutex_t) mutex);
168 void xbt_cond_timedwait(xbt_cond_t cond, xbt_mutex_t mutex, double delay)
170 simcall_cond_wait_timeout((smx_cond_t) cond, (smx_mutex_t) mutex, delay);
173 void xbt_cond_signal(xbt_cond_t cond)
175 simcall_cond_signal((smx_cond_t) cond);
178 void xbt_cond_broadcast(xbt_cond_t cond)
180 simcall_cond_broadcast((smx_cond_t) cond);
183 void xbt_cond_destroy(xbt_cond_t cond)
185 simcall_cond_destroy((smx_cond_t) cond);
188 /***** barrier related functions *****/
189 typedef struct s_xbt_bar_ {
192 unsigned int arrived_processes;
193 unsigned int expected_processes;
196 xbt_bar_t xbt_barrier_init(unsigned int count)
198 xbt_bar_t bar = xbt_new0(s_xbt_bar_, 1);
199 bar->expected_processes = count;
200 bar->arrived_processes = 0;
201 bar->mutex = xbt_mutex_init();
202 bar->cond = xbt_cond_init();
207 int xbt_barrier_wait(xbt_bar_t bar)
210 xbt_mutex_acquire(bar->mutex);
211 if (++bar->arrived_processes == bar->expected_processes) {
212 xbt_cond_broadcast(bar->cond);
213 xbt_mutex_release(bar->mutex);
214 ret=XBT_BARRIER_SERIAL_PROCESS;
215 bar->arrived_processes = 0;
217 xbt_cond_wait(bar->cond, bar->mutex);
218 xbt_mutex_release(bar->mutex);
224 void xbt_barrier_destroy(xbt_bar_t bar)
226 xbt_mutex_destroy(bar->mutex);
227 xbt_cond_destroy(bar->cond);