/* Used in RL to get win/lin portability, and in SG when CONTEXT_THREAD */
/* in SG, when using CONTEXT_UCONTEXT, xbt_os_thread_stub is used instead */
-/* Copyright (c) 2007, 2008, 2009, 2010. The SimGrid Team.
+/* Copyright (c) 2007-2013. The SimGrid Team.
* All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
-#include "gras_config.h"
+#include "internal_config.h"
#include "xbt/sysdep.h"
#include "xbt/ex.h"
#include "xbt/ex_interface.h" /* We play crude games with exceptions */
/* ********************************* PTHREAD IMPLEMENTATION ************************************ */
#ifdef HAVE_PTHREAD_H
-#include <pthread.h>
+#include <limits.h>
#include <semaphore.h>
#ifdef HAVE_MUTEX_TIMEDLOCK
static pthread_key_t xbt_self_thread_key;
static int thread_mod_inited = 0;
+/* attribute structure to handle pthread stack size changing */
+//FIXME: find where to put this
+static pthread_attr_t attr;
+static int thread_attr_inited = 0;
+
/* frees the xbt_os_thread_t corresponding to the current thread */
static void xbt_os_thread_free_thread_data(xbt_os_thread_t thread)
{
static void _os_thread_ex_terminate(xbt_ex_t * e)
{
xbt_ex_display(e);
-
- abort();
+ xbt_abort();
/* FIXME: there should be a configuration variable to choose to kill everyone or only this one */
}
__xbt_ex_terminate = &__xbt_ex_terminate_default;
}
+/* this function is critical to tesh+mmalloc, don't mess with it */
int xbt_os_thread_atfork(void (*prepare)(void),
void (*parent)(void), void (*child)(void))
{
+#ifdef WIN32
+ THROW_UNIMPLEMENTED; //pthread_atfork is not implemented in pthread.h on windows
+#else
return pthread_atfork(prepare, parent, child);
+#endif
}
static void *wrapper_start_routine(void *s)
THROWF(system_error, errcode,
"pthread_setspecific failed for xbt_self_thread_key");
- void *res = (*(t->start_routine)) (t->param);
+ void *res = t->start_routine(t->param);
if (t->detached)
xbt_os_thread_free_thread_data(t);
return res;
}
+
xbt_os_thread_t xbt_os_thread_create(const char *name,
pvoid_f_pvoid_t start_routine,
void *param,
XBT_RUNNING_CTX_INITIALIZE(res_thread->running_ctx);
res_thread->extra_data = extra_data;
- if ((errcode = pthread_create(&(res_thread->t), NULL,
+ if ((errcode = pthread_create(&(res_thread->t), thread_attr_inited!=0? &attr: NULL,
wrapper_start_routine, res_thread)))
THROWF(system_error, errcode,
"pthread_create failed: %s", strerror(errcode));
+
+
return res_thread;
}
+
+void xbt_os_thread_setstacksize(int stack_size)
+{
+ size_t sz;
+ int res;
+
+ if (stack_size < 0)
+ xbt_die("stack size %d is negative, maybe it exceeds MAX_INT?", stack_size);
+
+ sz = stack_size;
+ pthread_attr_init(&attr);
+ res = pthread_attr_setstacksize(&attr, sz);
+
+#ifdef PTHREAD_STACK_MIN
+ if (res == EINVAL) {
+ /* Invalid size, try again with a multiple of PTHREAD_STACK_MIN. */
+ size_t rem = sz % PTHREAD_STACK_MIN;
+ if (rem != 0 || sz == 0) {
+ size_t sz2 = sz - rem + PTHREAD_STACK_MIN;
+ XBT_DEBUG("pthread_attr_setstacksize failed for %#zx, try again with %#zx",
+ sz, sz2);
+ sz = sz2;
+ res = pthread_attr_setstacksize(&attr, sz);
+ }
+ }
+#endif
+
+ if (res == EINVAL)
+ XBT_WARN("invalid stack size (maybe too big): %#zx", sz);
+ else if (res != 0)
+ XBT_WARN("unknown error %d in pthread stacksize setting: %#zx", res, sz);
+ thread_attr_inited = 1;
+}
+
const char *xbt_os_thread_name(xbt_os_thread_t t)
{
return t->name;
return res;
}
+void xbt_os_thread_key_create(xbt_os_thread_key_t* key) {
+
+ int errcode;
+ if ((errcode = pthread_key_create(key, NULL)))
+ THROWF(system_error, errcode, "pthread_key_create failed");
+}
+
+void xbt_os_thread_set_specific(xbt_os_thread_key_t key, void* value) {
+
+ int errcode;
+ if ((errcode = pthread_setspecific(key, value)))
+ THROWF(system_error, errcode, "pthread_setspecific failed");
+}
+
+void* xbt_os_thread_get_specific(xbt_os_thread_key_t key) {
+ return pthread_getspecific(key);
+}
+
void xbt_os_thread_detach(xbt_os_thread_t thread)
{
thread->detached = 1;
THROWF(timeout_error, 0, "mutex %p not ready", mutex);
default:
THROWF(system_error, errcode,
- "xbt_mutex_timedacquire(%p) failed: %s", mutex,
+ "xbt_os_mutex_timedacquire(%p) failed: %s", mutex,
strerror(errcode));
}
if ((res->ps == (sem_t *) SEM_FAILED) && (errno == ENAMETOOLONG)) {
/* Old darwins only allow 13 chars. Did you create *that* amount of semaphores? */
res->name[13] = '\0';
- res->ps = sem_open(res->name, O_CREAT, 0644, 1);
+ res->ps = sem_open(res->name, O_CREAT, 0644, value);
}
if ((res->ps == (sem_t *) SEM_FAILED))
THROWF(system_error, errno, "sem_open() failed: %s", strerror(errno));
#endif
/* the default size of the stack of the threads (in bytes)*/
-#define XBT_DEFAULT_THREAD_STACK_SIZE 4096
-
+#define XBT_DEFAULT_THREAD_STACK_SIZE 4096
+static int stack_size=0;
/* key to the TLS containing the xbt_os_thread_t structure */
static unsigned long xbt_self_thread_key;
t->start_routine = start_routine;
t->param = param;
t->extra_data = extra_data;
- t->handle = CreateThread(NULL, XBT_DEFAULT_THREAD_STACK_SIZE,
+ t->handle = CreateThread(NULL, stack_size==0 ? XBT_DEFAULT_THREAD_STACK_SIZE : stack_size,
(LPTHREAD_START_ROUTINE) wrapper_start_routine,
t, STACK_SIZE_PARAM_IS_A_RESERVATION, &(t->id));
return t;
}
+void xbt_os_thread_setstacksize(int size)
+{
+ stack_size = size;
+}
+
const char *xbt_os_thread_name(xbt_os_thread_t t)
{
return t->name;
CloseHandle(thread->handle);
- if (thread->name)
- free(thread->name);
+ free(thread->name);
free(thread);
}
ExitThread(0);
}
+void xbt_os_thread_key_create(xbt_os_thread_key_t* key) {
+
+ *key = TlsAlloc();
+}
+
+void xbt_os_thread_set_specific(xbt_os_thread_key_t key, void* value) {
+
+ if (!TlsSetValue(key, value))
+ THROWF(system_error, (int) GetLastError(), "TlsSetValue() failed");
+}
+
+void* xbt_os_thread_get_specific(xbt_os_thread_key_t key) {
+ return TlsGetValue(key);
+}
+
void xbt_os_thread_detach(xbt_os_thread_t thread)
{
THROW_UNIMPLEMENTED;
#endif
+
+/** @brief Returns the amount of cores on the current host */
+int xbt_os_get_numcores(void) {
+#ifdef WIN32
+ SYSTEM_INFO sysinfo;
+ GetSystemInfo(&sysinfo);
+ return sysinfo.dwNumberOfProcessors;
+#elif MACOS
+ int nm[2];
+ size_t len = 4;
+ uint32_t count;
+
+ nm[0] = CTL_HW; nm[1] = HW_AVAILCPU;
+ sysctl(nm, 2, &count, &len, NULL, 0);
+
+ if(count < 1) {
+ nm[1] = HW_NCPU;
+ sysctl(nm, 2, &count, &len, NULL, 0);
+ if(count < 1) { count = 1; }
+ }
+ return count;
+#else
+ return sysconf(_SC_NPROCESSORS_ONLN);
+#endif
+}
+
+
+/***** reentrant mutexes *****/
+typedef struct xbt_os_rmutex_ {
+ xbt_os_mutex_t mutex;
+ xbt_os_thread_t owner;
+ int count;
+} s_xbt_os_rmutex_t;
+
void xbt_os_thread_set_extra_data(void *data)
{
xbt_os_thread_self()->extra_data = data;
void *xbt_os_thread_get_extra_data(void)
{
- return xbt_os_thread_self()->extra_data;
+ xbt_os_thread_t self = xbt_os_thread_self();
+ return self? self->extra_data : NULL;
+}
+
+xbt_os_rmutex_t xbt_os_rmutex_init(void)
+{
+ xbt_os_rmutex_t rmutex = xbt_new0(struct xbt_os_rmutex_, 1);
+ rmutex->mutex = xbt_os_mutex_init();
+ rmutex->owner = NULL;
+ rmutex->count = 0;
+ return rmutex;
+}
+
+void xbt_os_rmutex_acquire(xbt_os_rmutex_t rmutex)
+{
+ xbt_os_thread_t self = xbt_os_thread_self();
+
+ if (self == NULL) {
+ /* the thread module is not initialized yet */
+ rmutex->owner = NULL;
+ return;
+ }
+
+ if (self != rmutex->owner) {
+ xbt_os_mutex_acquire(rmutex->mutex);
+ rmutex->owner = self;
+ rmutex->count = 1;
+ } else {
+ rmutex->count++;
+ }
+}
+
+void xbt_os_rmutex_release(xbt_os_rmutex_t rmutex)
+{
+ if (rmutex->owner == NULL) {
+ /* the thread module was not initialized */
+ return;
+ }
+
+ xbt_assert(rmutex->owner == xbt_os_thread_self());
+
+ if (--rmutex->count == 0) {
+ rmutex->owner = NULL;
+ xbt_os_mutex_release(rmutex->mutex);
+ }
+}
+
+void xbt_os_rmutex_destroy(xbt_os_rmutex_t rmutex)
+{
+ xbt_os_mutex_destroy(rmutex->mutex);
+ xbt_free(rmutex);
}