/* 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) 2007-2015. 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"
+#if defined(WIN32)
+#elif defined(__MACH__) && defined(__APPLE__)
+#include <stdint.h>
+#include <sys/types.h>
+#include <sys/sysctl.h>
+#else
+#include <unistd.h>
+#endif
+
+#include "src/internal_config.h"
#include "xbt/sysdep.h"
#include "xbt/ex.h"
-#include "xbt/ex_interface.h" /* We play crude games with exceptions */
-#include "portable.h"
+#include "src/xbt/ex_interface.h" /* We play crude games with exceptions */
+#include "src/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 */
+#include "src/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
+#ifndef _XBT_WIN32
#include <pthread.h>
+#include <limits.h>
#include <semaphore.h>
-#ifdef HAVE_MUTEX_TIMEDLOCK
-/* redefine the function header since we fail to get this from system headers on amd (at least) */
-int pthread_mutex_timedlock(pthread_mutex_t * mutex,
- const struct timespec *abs_timeout);
+#ifdef CORE_BINDING
+#define _GNU_SOURCE
+#include <sched.h>
#endif
-
/* use named sempahore when sem_init() does not work */
#ifndef HAVE_SEM_INIT
static int next_sem_ID = 0;
static pthread_key_t xbt_self_thread_key;
static int thread_mod_inited = 0;
+/* defaults attribute for pthreads */
+//FIXME: find where to put this
+static pthread_attr_t thread_attr;
+
/* 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 */
}
if ((errcode = pthread_setspecific(xbt_self_thread_key, main_thread)))
THROWF(system_error, errcode,
- "pthread_setspecific failed for xbt_self_thread_key");
-
+ "Impossible to set the SimGrid identity descriptor to the main thread (pthread_setspecific failed)");
__xbt_running_ctx_fetch = _os_thread_get_running_ctx;
__xbt_ex_terminate = _os_thread_ex_terminate;
+ pthread_attr_init(&thread_attr);
+
thread_mod_inited = 1;
#ifndef HAVE_SEM_INIT
__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,
wrapper_start_routine, res_thread)))
THROWF(system_error, errcode,
"pthread_create failed: %s", strerror(errcode));
+
+
return res_thread;
}
+
+#ifdef CORE_BINDING
+int xbt_os_thread_bind(xbt_os_thread_t thread, int cpu){
+ pthread_t pthread = thread->t;
+ int errcode = 0;
+ cpu_set_t cpuset;
+ CPU_ZERO(&cpuset);
+ CPU_SET(cpu, &cpuset);
+ errcode = pthread_setaffinity_np(pthread, sizeof(cpu_set_t), &cpuset);
+ return errcode;
+}
+#endif
+
+void xbt_os_thread_setstacksize(int stack_size)
+{
+ size_t alignment[] = {
+ xbt_pagesize,
+#ifdef PTHREAD_STACK_MIN
+ PTHREAD_STACK_MIN,
+#endif
+ 0
+ };
+ size_t sz;
+ int res;
+ int i;
+
+ if (stack_size < 0)
+ xbt_die("stack size %d is negative, maybe it exceeds MAX_INT?", stack_size);
+
+ sz = stack_size;
+ res = pthread_attr_setstacksize(&thread_attr, sz);
+
+ for (i = 0; res == EINVAL && alignment[i] > 0; i++) {
+ /* Invalid size, try again with next multiple of alignment[i]. */
+ size_t rem = sz % alignment[i];
+ if (rem != 0 || sz == 0) {
+ size_t sz2 = sz - rem + alignment[i];
+ XBT_DEBUG("pthread_attr_setstacksize failed for %zd, try again with %zd",
+ sz, sz2);
+ sz = sz2;
+ res = pthread_attr_setstacksize(&thread_attr, sz);
+ }
+ }
+
+ if (res == EINVAL)
+ XBT_WARN("invalid stack size (maybe too big): %zd", sz);
+ else if (res != 0)
+ XBT_WARN("unknown error %d in pthread stacksize setting: %zd", res, sz);
+}
+
+void xbt_os_thread_setguardsize(int guard_size)
+{
+#ifdef WIN32
+ THROW_UNIMPLEMENTED; //pthread_attr_setguardsize is not implemented in pthread.h on windows
+#else
+ size_t sz = guard_size;
+ int res = pthread_attr_setguardsize(&thread_attr, sz);
+ if (res)
+ XBT_WARN("pthread_attr_setguardsize failed (%d) for size: %zd", res, sz);
+#endif
+}
+
const char *xbt_os_thread_name(xbt_os_thread_t t)
{
return t->name;
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))
+ if (res->ps == (sem_t *) SEM_FAILED)
THROWF(system_error, errno, "sem_open() failed: %s", strerror(errno));
/* Remove the name from the semaphore namespace: we never join on it */
#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;
void xbt_os_thread_mod_preinit(void)
{
xbt_self_thread_key = TlsAlloc();
+
+ xbt_os_thread_t main_thread = xbt_new0(s_xbt_os_thread_t, 1);
+ main_thread->name = (char *) "main";
+ main_thread->start_routine = NULL;
+ main_thread->param = NULL;
+
+ if (!TlsSetValue(xbt_self_thread_key, main_thread))
+ THROWF(system_error, (int)GetLastError(),
+ "Impossible to set the SimGrid identity descriptor to the main thread (TlsSetValue() failed)");
+
}
void xbt_os_thread_mod_postexit(void)
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;
+}
+
+void xbt_os_thread_setguardsize(int size)
+{
+ XBT_WARN("xbt_os_thread_setguardsize is not implemented (%d)", 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);
}
#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 defined(__APPLE__) && defined(__MACH__)
+ 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;
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_, 0);
+ xbt_os_rmutex_t rmutex = xbt_new0(struct xbt_os_rmutex_, 1);
rmutex->mutex = xbt_os_mutex_init();
rmutex->owner = NULL;
rmutex->count = 0;