/* * Copyright (c) 2008 - 2010 * Jonathan Schleifer * * 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 typedef pthread_t of_thread_t; typedef pthread_mutex_t of_mutex_t; typedef pthread_key_t of_tlskey_t; #elif defined(_WIN32) # include 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 int32_t of_spinlock_t; #elif defined(OF_HAVE_PTHREAD_SPINLOCKS) typedef pthread_spinlock_t of_spinlock_t; #else typedef pthread_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 BOOL of_thread_cancel(of_thread_t thread) { #if defined(OF_HAVE_PTHREADS) return (pthread_cancel(thread) ? NO : YES); #elif defined(_WIN32) if (thread != INVALID_HANDLE_VALUE) { TerminateThread(thread, 1); CloseHandle(thread); } return YES; #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_32(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) while (!of_spinlock_trylock(s)) { # ifdef OF_HAVE_SCHED_YIELD sched_yield(); # 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) of_atomic_and_32((uint32_t*)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 }