/* * Copyright (c) 2008, 2009, 2010, 2011 * 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.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 "objfw-defs.h" #if !defined(OF_THREADS) || (!defined(OF_HAVE_PTHREADS) && !defined(_WIN32)) # error No threads available! #endif #import "macros.h" #if defined(OF_HAVE_PTHREADS) # include typedef pthread_t of_thread_t; typedef pthread_key_t of_tlskey_t; typedef pthread_mutex_t of_mutex_t; typedef pthread_cond_t of_condition_t; #elif defined(_WIN32) # include typedef HANDLE of_thread_t; typedef DWORD of_tlskey_t; typedef CRITICAL_SECTION of_mutex_t; typedef struct { HANDLE event; int count; } of_condition_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_condition_new(of_condition_t *condition) { #if defined(OF_HAVE_PTHREADS) return (pthread_cond_init(condition, NULL) ? NO : YES); #elif defined(_WIN32) condition->count = 0; if ((condition->event = CreateEvent(NULL, FALSE, 0, NULL)) == NULL) return NO; return YES; #endif } static OF_INLINE BOOL of_condition_wait(of_condition_t *condition, of_mutex_t *mutex) { #if defined(OF_HAVE_PTHREADS) return (pthread_cond_wait(condition, mutex) ? NO : YES); #elif defined(_WIN32) if (!of_mutex_unlock(mutex)) return NO; of_atomic_inc_int(&condition->count); if (WaitForSingleObject(condition->event, INFINITE) != WAIT_OBJECT_0) { of_mutex_lock(mutex); return NO; } of_atomic_dec_int(&condition->count); if (!of_mutex_lock(mutex)) return NO; return YES; #endif } static OF_INLINE BOOL of_condition_signal(of_condition_t *condition) { #if defined(OF_HAVE_PTHREADS) return (pthread_cond_signal(condition) ? NO : YES); #elif defined(_WIN32) return (SetEvent(condition->event) ? YES : NO); #endif } static OF_INLINE BOOL of_condition_broadcast(of_condition_t *condition) { #if defined(OF_HAVE_PTHREADS) return (pthread_cond_broadcast(condition) ? NO : YES); #elif defined(_WIN32) size_t i; for (i = 0; i < condition->count; i++) if (!SetEvent(condition->event)) return NO; return YES; #endif } static OF_INLINE BOOL of_condition_free(of_condition_t *condition) { #if defined(OF_HAVE_PTHREADS) return (pthread_cond_destroy(condition) ? NO : YES); #elif defined(_WIN32) if (condition->count) return NO; return (CloseHandle(condition->event) ? YES : NO); #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) # if defined(OF_HAVE_SCHED_YIELD) || defined(_WIN32) int i; for (i = 0; i < OF_SPINCOUNT; i++) if (of_spinlock_trylock(s)) return YES; while (!of_spinlock_trylock(s)) # ifndef _WIN32 sched_yield(); # else Sleep(0); # endif # 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 }