/*
* Copyright (c) 2008 - 2010
* 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 included in
* the packaging of this file.
*/
#import "atomic.h"
#if !defined(OF_THREADS) || (!defined(OF_HAVE_PTHREADS) && !defined(_WIN32))
# error No threads available!
#endif
#if defined(OF_HAVE_PTHREADS)
# include <pthread.h>
typedef pthread_t of_thread_t;
typedef pthread_mutex_t of_mutex_t;
typedef pthread_key_t of_tlskey_t;
#elif defined(_WIN32)
# include <windows.h>
typedef HANDLE of_thread_t;
typedef CRITICAL_SECTION of_mutex_t;
typedef DWORD of_tlskey_t;
#endif
#if defined(OF_ATOMIC_OPS)
# import "atomic.h"
typedef volatile int of_spinlock_t;
# define OF_SPINCOUNT 10
#elif defined(OF_HAVE_PTHREAD_SPINLOCKS)
typedef pthread_spinlock_t of_spinlock_t;
#else
typedef of_mutex_t of_spinlock_t;
#endif
#if defined(OF_HAVE_PTHREADS)
# define of_thread_is_current(t) pthread_equal(t, pthread_self())
# define of_thread_current() pthread_self()
#elif defined(_WIN32)
# define of_thread_is_current(t) (t == GetCurrentThread())
# define of_thread_current() GetCurrentThread()
#endif
static OF_INLINE BOOL
of_thread_new(of_thread_t *thread, id (*main)(id), id data)
{
#if defined(OF_HAVE_PTHREADS)
return (pthread_create(thread, NULL, (void*(*)(void*))main,
(void*)data) ? NO : YES);
#elif defined(_WIN32)
*thread = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)main,
(void*)data, 0, NULL);
return (thread == NULL ? NO : YES);
#endif
}
static OF_INLINE BOOL
of_thread_join(of_thread_t thread)
{
#if defined(OF_HAVE_PTHREADS)
void *ret;
if (pthread_join(thread, &ret))
return NO;
return (ret != PTHREAD_CANCELED ? YES : NO);
#elif defined(_WIN32)
if (WaitForSingleObject(thread, INFINITE))
return NO;
CloseHandle(thread);
return YES;
#endif
}
static OF_INLINE void
of_thread_exit()
{
#if defined(OF_HAVE_PTHREADS)
pthread_exit(NULL);
#elif defined(_WIN32)
ExitThread(0);
#endif
}
static OF_INLINE BOOL
of_mutex_new(of_mutex_t *mutex)
{
#if defined(OF_HAVE_PTHREADS)
return (pthread_mutex_init(mutex, NULL) ? NO : YES);
#elif defined(_WIN32)
InitializeCriticalSection(mutex);
return YES;
#endif
}
static OF_INLINE BOOL
of_mutex_free(of_mutex_t *mutex)
{
#if defined(OF_HAVE_PTHREADS)
return (pthread_mutex_destroy(mutex) ? NO : YES);
#elif defined(_WIN32)
DeleteCriticalSection(mutex);
return YES;
#endif
}
static OF_INLINE BOOL
of_mutex_lock(of_mutex_t *mutex)
{
#if defined(OF_HAVE_PTHREADS)
return (pthread_mutex_lock(mutex) ? NO : YES);
#elif defined(_WIN32)
EnterCriticalSection(mutex);
return YES;
#endif
}
static OF_INLINE BOOL
of_mutex_trylock(of_mutex_t *mutex)
{
#if defined(OF_HAVE_PTHREADS)
return (pthread_mutex_trylock(mutex) ? NO : YES);
#elif defined(_WIN32)
return (TryEnterCriticalSection(mutex) ? YES : NO);
#endif
}
static OF_INLINE BOOL
of_mutex_unlock(of_mutex_t *mutex)
{
#if defined(OF_HAVE_PTHREADS)
return (pthread_mutex_unlock(mutex) ? NO : YES);
#elif defined(_WIN32)
LeaveCriticalSection(mutex);
return YES;
#endif
}
static OF_INLINE BOOL
of_tlskey_new(of_tlskey_t *key)
{
#if defined(OF_HAVE_PTHREADS)
return (pthread_key_create(key, NULL) ? NO : YES);
#elif defined(_WIN32)
return ((*key = TlsAlloc()) == TLS_OUT_OF_INDEXES ? NO : YES);
#endif
}
static OF_INLINE id
of_tlskey_get(of_tlskey_t key)
{
#if defined(OF_HAVE_PTHREADS)
void *ret = pthread_getspecific(key);
#elif defined(_WIN32)
void *ret = TlsGetValue(key);
#endif
/* NULL and nil might be different! */
if (ret == NULL)
return nil;
return (id)ret;
}
static OF_INLINE BOOL
of_tlskey_set(of_tlskey_t key, id obj)
{
void *p = (obj != nil ? (void*)obj : NULL);
#if defined(OF_HAVE_PTHREADS)
return (pthread_setspecific(key, p) ? NO : YES);
#elif defined(_WIN32)
return (TlsSetValue(key, p) ? YES : NO);
#endif
}
static OF_INLINE BOOL
of_tlskey_free(of_tlskey_t key)
{
#if defined(OF_HAVE_PTHREADS)
return (pthread_key_delete(key) ? NO : YES);
#elif defined(_WIN32)
return (TlsFree(key) ? YES : NO);
#endif
}
static OF_INLINE BOOL
of_spinlock_new(of_spinlock_t *s)
{
#if defined(OF_ATOMIC_OPS)
*s = 0;
return YES;
#elif defined(OF_HAVE_PTHREAD_SPINLOCKS)
return (pthread_spin_init(s, 0) ? NO : YES);
#else
return of_mutex_new(s);
#endif
}
static OF_INLINE BOOL
of_spinlock_trylock(of_spinlock_t *s)
{
#if defined(OF_ATOMIC_OPS)
return (of_atomic_cmpswap_int(s, 0, 1) ? YES : NO);
#elif defined(OF_HAVE_PTHREAD_SPINLOCKS)
return (pthread_spin_trylock(s) ? NO : YES);
#else
return of_mutex_trylock(s);
#endif
}
static OF_INLINE BOOL
of_spinlock_lock(of_spinlock_t *s)
{
#if defined(OF_ATOMIC_OPS)
# ifdef OF_HAVE_SCHED_YIELD
int i;
for (i = 0; i < OF_SPINCOUNT; i++)
if (of_spinlock_trylock(s))
return YES;
while (!of_spinlock_trylock(s))
sched_yield();
# else
while (!of_spinlock_trylock(s));
# endif
return YES;
#elif defined(OF_HAVE_PTHREAD_SPINLOCKS)
return (pthread_spin_lock(s) ? NO : YES);
#else
return of_mutex_lock(s);
#endif
}
static OF_INLINE BOOL
of_spinlock_unlock(of_spinlock_t *s)
{
#if defined(OF_ATOMIC_OPS)
*s = 0;
return YES;
#elif defined(OF_HAVE_PTHREAD_SPINLOCKS)
return (pthread_spin_unlock(s) ? NO : YES);
#else
return of_mutex_unlock(s);
#endif
}
static OF_INLINE BOOL
of_spinlock_free(of_spinlock_t *s)
{
#if defined(OF_ATOMIC_OPS)
return YES;
#elif defined(OF_HAVE_PTHREAD_SPINLOCKS)
return (pthread_spin_destroy(s) ? NO : YES);
#else
return of_mutex_free(s);
#endif
}