Archipelago » qemu

/*

 *  Copyright (c) 2003 Fabrice Bellard

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library; if not, see <http://www.gnu.org/licenses/>

 */

/* configure guarantees us that we have pthreads on any host except

 * mingw32, which doesn't support any of the user-only targets.

 * So we can simply assume we have pthread mutexes here.

 */

#if defined(CONFIG_USER_ONLY)

#include <pthread.h>

#define spin_lock pthread_mutex_lock

#define spin_unlock pthread_mutex_unlock

#define spinlock_t pthread_mutex_t

#define SPIN_LOCK_UNLOCKED PTHREAD_MUTEX_INITIALIZER

#else

/* Empty implementations, on the theory that system mode emulation

 * is single-threaded. This means that these functions should only

 * be used from code run in the TCG cpu thread, and cannot protect

 * data structures which might also be accessed from the IO thread

 * or from signal handlers.

 */

typedef int spinlock_t;

#define SPIN_LOCK_UNLOCKED 0

static inline void spin_lock(spinlock_t *lock)

{

}

static inline void spin_unlock(spinlock_t *lock)

{

}

#endif