2: * Copyright (c) 2003 Fabrice Bellard
4: * This library is free software; you can redistribute it and/or
5: * modify it under the terms of the GNU Lesser General Public
6: * License as published by the Free Software Foundation; either
7: * version 2 of the License, or (at your option) any later version.
9: * This library is distributed in the hope that it will be useful,
10: * but WITHOUT ANY WARRANTY; without even the implied warranty of
11: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12: * Lesser General Public License for more details.
14: * You should have received a copy of the GNU Lesser General Public
15: * License along with this library; if not, see <http://www.gnu.org/licenses/>
18: /* configure guarantees us that we have pthreads on any host except
19: * mingw32, which doesn't support any of the user-only targets.
20: * So we can simply assume we have pthread mutexes here.
22: #if defined(CONFIG_USER_ONLY)
24: #include <pthread.h>
25: #define spin_lock pthread_mutex_lock
26: #define spin_unlock pthread_mutex_unlock
27: #define spinlock_t pthread_mutex_t
28: #define SPIN_LOCK_UNLOCKED PTHREAD_MUTEX_INITIALIZER
32: /* Empty implementations, on the theory that system mode emulation
33: * is single-threaded. This means that these functions should only
34: * be used from code run in the TCG cpu thread, and cannot protect
35: * data structures which might also be accessed from the IO thread
36: * or from signal handlers.
38: typedef int spinlock_t;
39: #define SPIN_LOCK_UNLOCKED 0
41: static inline void spin_lock(spinlock_t *lock)
45: static inline void spin_unlock(spinlock_t *lock)