/*
* Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014
* Jonathan Schleifer <js@webkeks.org>
*
* All rights reserved.
*
* This file is part of ObjFW. It may be distributed under the terms of the
* Q Public License 1.0, which can be found in the file LICENSE.QPL included in
* the packaging of this file.
*
* Alternatively, it may be distributed under the terms of the GNU General
* Public License, either version 2 or 3, which can be found in the file
* LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
* file.
*/
#import "threading.h"
bool
of_thread_new(of_thread_t *thread, id (*function)(id), id data)
{
#if defined(OF_HAVE_PTHREADS)
return (pthread_create(thread, NULL, (void*(*)(void*))function,
(__bridge void*)data) == 0);
#elif defined(_WIN32)
*thread = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)function,
(__bridge void*)data, 0, NULL);
return (thread != NULL);
#else
# error of_thread_new not implemented!
#endif
}
bool
of_thread_join(of_thread_t thread)
{
#if defined(OF_HAVE_PTHREADS)
void *ret;
if (pthread_join(thread, &ret) != 0)
return false;
# ifdef PTHREAD_CANCELED
return (ret != PTHREAD_CANCELED);
# else
return true;
# endif
#elif defined(_WIN32)
if (WaitForSingleObject(thread, INFINITE))
return false;
CloseHandle(thread);
return true;
#else
# error of_thread_join not implemented!
#endif
}
bool
of_thread_detach(of_thread_t thread)
{
#if defined(OF_HAVE_PTHREADS)
return !pthread_detach(thread);
#elif defined(_WIN32)
/* FIXME */
return true;
#else
# error of_thread_detach not implemented!
#endif
}
void noreturn
of_thread_exit(void)
{
#if defined(OF_HAVE_PTHREADS)
pthread_exit(NULL);
#elif defined(_WIN32)
ExitThread(0);
#else
# error of_thread_exit not implemented!
#endif
OF_UNREACHABLE
}
void
of_once(of_once_t *control, void (*func)(void))
{
#if defined(OF_HAVE_PTHREADS)
pthread_once(control, func);
#elif defined(_WIN32)
switch (InterlockedCompareExchange(control, 1, 0)) {
case 0:
func();
InterlockedIncrement(control);
break;
case 1:
while (*control == 1)
Sleep(0);
break;
}
#else
# error of_once not implemented!
#endif
}
bool
of_mutex_new(of_mutex_t *mutex)
{
#if defined(OF_HAVE_PTHREADS)
return !pthread_mutex_init(mutex, NULL);
#elif defined(_WIN32)
InitializeCriticalSection(mutex);
return true;
#else
# error of_mutex_new not implemented!
#endif
}
bool
of_mutex_lock(of_mutex_t *mutex)
{
#if defined(OF_HAVE_PTHREADS)
return !pthread_mutex_lock(mutex);
#elif defined(_WIN32)
EnterCriticalSection(mutex);
return true;
#else
# error of_mutex_lock not implemented!
#endif
}
bool
of_mutex_trylock(of_mutex_t *mutex)
{
#if defined(OF_HAVE_PTHREADS)
return !pthread_mutex_trylock(mutex);
#elif defined(_WIN32)
return TryEnterCriticalSection(mutex);
#else
# error of_mutex_trylock not implemented!
#endif
}
bool
of_mutex_unlock(of_mutex_t *mutex)
{
#if defined(OF_HAVE_PTHREADS)
return (pthread_mutex_unlock(mutex) == 0);
#elif defined(_WIN32)
LeaveCriticalSection(mutex);
return true;
#else
# error of_mutex_unlock not implemented!
#endif
}
bool
of_mutex_free(of_mutex_t *mutex)
{
#if defined(OF_HAVE_PTHREADS)
return !pthread_mutex_destroy(mutex);
#elif defined(_WIN32)
DeleteCriticalSection(mutex);
return true;
#else
# error of_mutex_free not implemented!
#endif
}
bool
of_rmutex_new(of_rmutex_t *rmutex)
{
#ifdef OF_HAVE_RECURSIVE_PTHREAD_MUTEXES
pthread_mutexattr_t attr;
if (pthread_mutexattr_init(&attr) != 0)
return false;
if (pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE) != 0)
return false;
if (pthread_mutex_init(rmutex, &attr) != 0)
return false;
if (pthread_mutexattr_destroy(&attr) != 0)
return false;
return true;
#else
if (!of_mutex_new(&rmutex->mutex))
return false;
if (!of_tlskey_new(&rmutex->count))
return false;
return true;
#endif
}
bool
of_rmutex_lock(of_rmutex_t *rmutex)
{
#ifdef OF_HAVE_RECURSIVE_PTHREAD_MUTEXES
return of_mutex_lock(rmutex);
#else
uintptr_t count = (uintptr_t)of_tlskey_get(rmutex->count);
if (count > 0) {
if (!of_tlskey_set(rmutex->count, (void*)(count + 1)))
return false;
return true;
}
if (!of_mutex_lock(&rmutex->mutex))
return false;
if (!of_tlskey_set(rmutex->count, (void*)1)) {
of_mutex_unlock(&rmutex->mutex);
return false;
}
return true;
#endif
}
bool
of_rmutex_trylock(of_rmutex_t *rmutex)
{
#ifdef OF_HAVE_RECURSIVE_PTHREAD_MUTEXES
return of_mutex_trylock(rmutex);
#else
uintptr_t count = (uintptr_t)of_tlskey_get(rmutex->count);
if (count > 0) {
if (!of_tlskey_set(rmutex->count, (void*)(count + 1)))
return false;
return true;
}
if (!of_mutex_trylock(&rmutex->mutex))
return false;
if (!of_tlskey_set(rmutex->count, (void*)1)) {
of_mutex_unlock(&rmutex->mutex);
return false;
}
return true;
#endif
}
bool
of_rmutex_unlock(of_rmutex_t *rmutex)
{
#ifdef OF_HAVE_RECURSIVE_PTHREAD_MUTEXES
return of_mutex_unlock(rmutex);
#else
uintptr_t count = (uintptr_t)of_tlskey_get(rmutex->count);
if (count > 1) {
if (!of_tlskey_set(rmutex->count, (void*)(count - 1)))
return false;
return true;
}
if (!of_tlskey_set(rmutex->count, (void*)0))
return false;
if (!of_mutex_unlock(&rmutex->mutex))
return false;
return true;
#endif
}
bool
of_rmutex_free(of_rmutex_t *rmutex)
{
#ifdef OF_HAVE_RECURSIVE_PTHREAD_MUTEXES
return of_mutex_free(rmutex);
#else
if (!of_mutex_free(&rmutex->mutex))
return false;
if (!of_tlskey_free(rmutex->count))
return false;
return true;
#endif
}
bool
of_condition_new(of_condition_t *condition)
{
#if defined(OF_HAVE_PTHREADS)
return (pthread_cond_init(condition, NULL) == 0);
#elif defined(_WIN32)
condition->count = 0;
if ((condition->event = CreateEvent(NULL, FALSE, 0, NULL)) == NULL)
return false;
return true;
#else
# error of_condition_new not implemented!
#endif
}
bool
of_condition_signal(of_condition_t *condition)
{
#if defined(OF_HAVE_PTHREADS)
return !pthread_cond_signal(condition);
#elif defined(_WIN32)
return SetEvent(condition->event);
#else
# error of_condition_signal not implemented!
#endif
}
bool
of_condition_broadcast(of_condition_t *condition)
{
#if defined(OF_HAVE_PTHREADS)
return !pthread_cond_broadcast(condition);
#elif defined(_WIN32)
int i;
for (i = 0; i < condition->count; i++)
if (!SetEvent(condition->event))
return false;
return true;
#else
# error of_condition_broadcast not implemented!
#endif
}
bool
of_condition_wait(of_condition_t *condition, of_mutex_t *mutex)
{
#if defined(OF_HAVE_PTHREADS)
return !pthread_cond_wait(condition, mutex);
#elif defined(_WIN32)
if (!of_mutex_unlock(mutex))
return false;
of_atomic_int_inc(&condition->count);
if (WaitForSingleObject(condition->event, INFINITE) != WAIT_OBJECT_0) {
of_mutex_lock(mutex);
return false;
}
of_atomic_int_dec(&condition->count);
if (!of_mutex_lock(mutex))
return false;
return true;
#else
# error of_condition_wait not implemented!
#endif
}
bool
of_condition_timed_wait(of_condition_t *condition, of_mutex_t *mutex,
of_time_interval_t timeout)
{
#if defined(OF_HAVE_PTHREADS)
struct timespec ts;
ts.tv_sec = (time_t)timeout;
ts.tv_nsec = lrint((timeout - ts.tv_sec) * 1000000000);
return !pthread_cond_timedwait(condition, mutex, &ts);
#elif defined(_WIN32)
if (!of_mutex_unlock(mutex))
return false;
of_atomic_int_inc(&condition->count);
if (WaitForSingleObject(condition->event,
timeout * 1000) != WAIT_OBJECT_0) {
of_mutex_lock(mutex);
return false;
}
of_atomic_int_dec(&condition->count);
if (!of_mutex_lock(mutex))
return false;
return true;
#else
# error of_condition_timed_wait not implemented!
#endif
}
bool
of_condition_free(of_condition_t *condition)
{
#if defined(OF_HAVE_PTHREADS)
return !pthread_cond_destroy(condition);
#elif defined(_WIN32)
if (condition->count)
return false;
return CloseHandle(condition->event);
#else
# error of_condition_free not implemented!
#endif
}