/* 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) 2007-2013. The SimGrid Team.
+/* Copyright (c) 2007-2014. The SimGrid Team.
* All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
"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;
-/* attribute structure to handle pthread stack size changing */
+/* defaults attribute for pthreads */
//FIXME: find where to put this
-static pthread_attr_t attr;
-static int thread_attr_inited = 0;
+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)
if ((errcode = pthread_setspecific(xbt_self_thread_key, main_thread)))
THROWF(system_error, errcode,
"pthread_setspecific failed for xbt_self_thread_key");
-
__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_RUNNING_CTX_INITIALIZE(res_thread->running_ctx);
res_thread->extra_data = extra_data;
- if ((errcode = pthread_create(&(res_thread->t), thread_attr_inited!=0? &attr: 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));
}
+#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 def=0;
- if(stack_size<0)xbt_die("stack size is negative, maybe it exceeds MAX_INT?\n");
- pthread_attr_init(&attr);
- pthread_attr_getstacksize (&attr, &def);
- int res = pthread_attr_setstacksize (&attr, stack_size);
- if ( res!=0 ) {
- if(res==EINVAL)XBT_WARN("Thread stack size is either < PTHREAD_STACK_MIN, > the max limit of the system, or perhaps not a multiple of PTHREAD_STACK_MIN - The parameter was ignored");
- else XBT_WARN("unknown error in pthread stacksize setting");
-
- pthread_attr_setstacksize (&attr, def);
+ 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);
+ }
}
- thread_attr_inited=1;
+
+ 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)
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;
