#include "xbt/sysdep.h"
#include "xbt/ex.h"
+#include "xbt/ex_interface.h" /* We play crude games with exceptions */
#include "portable.h"
+#include "xbt/xbt_os_time.h" /* Portable time facilities */
#include "xbt/xbt_os_thread.h" /* This module */
#include "xbt_modinter.h" /* Initialization/finalization of this module */
-
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(xbt_sync_os,xbt,"Synchronization mechanism (OS-level)");
/* ********************************* PTHREAD IMPLEMENTATION ************************************ */
#ifdef HAVE_PTHREAD_H
#include <pthread.h>
+
typedef struct xbt_os_thread_ {
- /* KEEP IT IN SYNC WITH xbt_thread.c */
pthread_t t;
+ char *name;
void *param;
pvoid_f_pvoid_t *start_routine;
+ ex_ctx_t *exception;
} s_xbt_os_thread_t ;
+static xbt_os_thread_t main_thread = NULL;
/* thread-specific data containing the xbt_os_thread_t structure */
static pthread_key_t xbt_self_thread_key;
+static int thread_mod_inited = 0;
/* frees the xbt_os_thread_t corresponding to the current thread */
static void xbt_os_thread_free_thread_data(void*d){
free(d);
}
+/* callback: context fetching */
+static ex_ctx_t *_os_thread_ex_ctx(void) {
+ return xbt_os_thread_self()->exception;
+}
+
+/* callback: termination */
+static void _os_thread_ex_terminate(xbt_ex_t * e) {
+ xbt_ex_display(e);
+
+ abort();
+ /* FIXME: there should be a configuration variable to choose to kill everyone or only this one */
+}
+
void xbt_os_thread_mod_init(void) {
int errcode;
+ if (thread_mod_inited)
+ return;
+
if ((errcode=pthread_key_create(&xbt_self_thread_key, NULL)))
THROW0(system_error,errcode,"pthread_key_create failed for xbt_self_thread_key");
+
+ main_thread=xbt_new(s_xbt_os_thread_t,1);
+ main_thread->name = (char*)"main";
+ main_thread->start_routine = NULL;
+ main_thread->param = NULL;
+ main_thread->exception = xbt_new(ex_ctx_t, 1);
+ XBT_CTX_INITIALIZE(main_thread->exception);
+
+ thread_mod_inited = 1;
}
void xbt_os_thread_mod_exit(void) {
- /* FIXME: don't try to free our key on shutdown. Valgrind detects no leak if we don't, and whine if we try to */
+ /* FIXME: don't try to free our key on shutdown.
+ Valgrind detects no leak if we don't, and whine if we try to */
// int errcode;
// if ((errcode=pthread_key_delete(xbt_self_thread_key)))
int errcode;
if ((errcode=pthread_setspecific(xbt_self_thread_key,t)))
- THROW0(system_error,errcode,"pthread_setspecific failed for xbt_self_thread_key");
+ THROW0(system_error,errcode,
+ "pthread_setspecific failed for xbt_self_thread_key");
return t->start_routine(t->param);
}
-
-xbt_os_thread_t xbt_os_thread_create(pvoid_f_pvoid_t start_routine,
+xbt_os_thread_t xbt_os_thread_create(const char*name,
+ pvoid_f_pvoid_t start_routine,
void* param) {
int errcode;
xbt_os_thread_t res_thread=xbt_new(s_xbt_os_thread_t,1);
+ res_thread->name = xbt_strdup(name);
res_thread->start_routine = start_routine;
res_thread->param = param;
-
+ res_thread->exception = xbt_new(ex_ctx_t, 1);
+ XBT_CTX_INITIALIZE(res_thread->exception);
- if ((errcode = pthread_create(&(res_thread->t), NULL, wrapper_start_routine, res_thread)))
- THROW1(system_error,errcode, "pthread_create failed: %s",strerror(errcode));
+ if ((errcode = pthread_create(&(res_thread->t), NULL,
+ wrapper_start_routine, res_thread)))
+ THROW1(system_error,errcode,
+ "pthread_create failed: %s",strerror(errcode));
return res_thread;
}
+const char* xbt_os_thread_name(xbt_os_thread_t t) {
+ return t->name;
+}
+
+const char* xbt_os_thread_self_name(void) {
+ xbt_os_thread_t self = xbt_os_thread_self();
+ return self?self->name:"main";
+}
void
xbt_os_thread_join(xbt_os_thread_t thread,void ** thread_return) {
- int errcode;
-
- if ((errcode = pthread_join(thread->t,thread_return)))
- THROW1(system_error,errcode, "pthread_join failed: %s",
- strerror(errcode));
- free(thread);
+ int errcode;
+
+ if ((errcode = pthread_join(thread->t,thread_return)))
+ THROW1(system_error,errcode, "pthread_join failed: %s",
+ strerror(errcode));
+ if (thread->exception)
+ free(thread->exception);
+
+ if (thread == main_thread) /* just killed main thread */
+ main_thread = NULL;
+
+ free(thread);
}
void xbt_os_thread_exit(int *retval) {
}
xbt_os_thread_t xbt_os_thread_self(void) {
- return pthread_getspecific(xbt_self_thread_key);
+ xbt_os_thread_t res;
+
+ if (!thread_mod_inited)
+ return NULL;
+
+ res = pthread_getspecific(xbt_self_thread_key);
+ if (!res)
+ res = main_thread;
+
+ return res;
}
#include <sched.h>
void xbt_os_thread_yield(void) {
sched_yield();
}
+void xbt_os_thread_cancel(xbt_os_thread_t t) {
+ pthread_cancel(t->t);
+}
/****** mutex related functions ******/
typedef struct xbt_os_mutex_ {
/* KEEP IT IN SYNC WITH xbt_thread.c */
cond,mutex, strerror(errcode));
}
+#include <time.h>
+#include <math.h>
+void xbt_os_cond_timedwait(xbt_os_cond_t cond, xbt_os_mutex_t mutex, double delay) {
+ int errcode;
+ struct timespec ts_end;
+ double end = delay + xbt_os_time();
+ ts_end.tv_sec = (time_t) floor(end);
+ ts_end.tv_nsec = (long) ( ( end - ts_end.tv_sec) * 1000000000);
+ DEBUG3("pthread_cond_timedwait(%p,%p,%p)",&(cond->c),&(mutex->m), &ts_end);
+ switch ( (errcode=pthread_cond_timedwait(&(cond->c),&(mutex->m), &ts_end)) ) {
+ case ETIMEDOUT:
+ THROW3(timeout_error,errcode,"condition %p (mutex %p) wasn't signaled before timeout (%f)",
+ cond,mutex, delay);
+ default:
+ THROW4(system_error,errcode,"pthread_cond_timedwait(%p,%p,%f) failed: %s",
+ cond,mutex, delay, strerror(errcode));
+ }
+}
+
void xbt_os_cond_signal(xbt_os_cond_t cond) {
int errcode;
if ((errcode=pthread_cond_signal(&(cond->c))))
free(cond);
}
+void *xbt_os_thread_getparam(void) {
+ xbt_os_thread_t t = xbt_os_thread_self();
+ return t?t->param:NULL;
+}
+
/* ********************************* WINDOWS IMPLEMENTATION ************************************ */
#elif defined(WIN32)
typedef struct xbt_os_thread_ {
- /* KEEP IT IN SYNC WITH xbt_thread */
+ char *name;
HANDLE handle; /* the win thread handle */
unsigned long id; /* the win thread id */
pvoid_f_pvoid_t *start_routine;
}
-xbt_os_thread_t xbt_os_thread_create(pvoid_f_pvoid_t start_routine,
+xbt_os_thread_t xbt_os_thread_create(const char *name,pvoid_f_pvoid_t start_routine,
void* param) {
xbt_os_thread_t t = xbt_new(s_xbt_os_thread_t,1);
+ t->name = xbt_strdup(name);
t->start_routine = start_routine ;
t->param = param;
return t;
}
+const char* xbt_os_thread_name(xbt_os_thread_t t) {
+ return t->name;
+}
+
+const char* xbt_os_thread_self_name(void) {
+ xbt_os_thread_t t = xbt_os_thread_self();
+ return t?t->name:"main";
+}
+
void
xbt_os_thread_join(xbt_os_thread_t thread,void ** thread_return) {
}
CloseHandle(thread->handle);
+ free(thread->name);
free(thread);
}
return TlsGetValue(xbt_self_thread_key);
}
+void *xbt_os_thread_getparam(void) {
+ xbt_os_thread_t t = xbt_os_thread_self();
+ return t->param;
+}
+
+
void xbt_os_thread_yield(void) {
Sleep(0);
}
+void xbt_os_thread_cancel(xbt_os_thread_t t) {
+ THROW_UNIMPLEMENTED;
+}
/****** mutex related functions ******/
typedef struct xbt_os_mutex_ {
/* relock the mutex associated with the condition in accordance with the posix thread specification */
EnterCriticalSection (& mutex->lock);
}
+void xbt_os_cond_timedwait(xbt_os_cond_t cond, xbt_os_mutex_t mutex, double delay) {
+ THROW_UNIMPLEMENTED;
+}
void xbt_os_cond_signal(xbt_os_cond_t cond) {
int have_waiters;
