1 #ifndef __QEMU_THREAD_H 2 #define __QEMU_THREAD_H 1 3 4 #include "qemu/processor.h" 5 #include "qemu/atomic.h" 6 7 typedef struct QemuMutex QemuMutex; 8 typedef struct QemuCond QemuCond; 9 typedef struct QemuSemaphore QemuSemaphore; 10 typedef struct QemuEvent QemuEvent; 11 typedef struct QemuThread QemuThread; 12 13 #ifdef _WIN32 14 #include "qemu/thread-win32.h" 15 #else 16 #include "qemu/thread-posix.h" 17 #endif 18 19 #define QEMU_THREAD_JOINABLE 0 20 #define QEMU_THREAD_DETACHED 1 21 22 void qemu_mutex_init(QemuMutex *mutex); 23 void qemu_mutex_destroy(QemuMutex *mutex); 24 void qemu_mutex_lock(QemuMutex *mutex); 25 int qemu_mutex_trylock(QemuMutex *mutex); 26 void qemu_mutex_unlock(QemuMutex *mutex); 27 28 void qemu_cond_init(QemuCond *cond); 29 void qemu_cond_destroy(QemuCond *cond); 30 31 /* 32 * IMPORTANT: The implementation does not guarantee that pthread_cond_signal 33 * and pthread_cond_broadcast can be called except while the same mutex is 34 * held as in the corresponding pthread_cond_wait calls! 35 */ 36 void qemu_cond_signal(QemuCond *cond); 37 void qemu_cond_broadcast(QemuCond *cond); 38 void qemu_cond_wait(QemuCond *cond, QemuMutex *mutex); 39 40 void qemu_sem_init(QemuSemaphore *sem, int init); 41 void qemu_sem_post(QemuSemaphore *sem); 42 void qemu_sem_wait(QemuSemaphore *sem); 43 int qemu_sem_timedwait(QemuSemaphore *sem, int ms); 44 void qemu_sem_destroy(QemuSemaphore *sem); 45 46 void qemu_event_init(QemuEvent *ev, bool init); 47 void qemu_event_set(QemuEvent *ev); 48 void qemu_event_reset(QemuEvent *ev); 49 void qemu_event_wait(QemuEvent *ev); 50 void qemu_event_destroy(QemuEvent *ev); 51 52 void qemu_thread_create(QemuThread *thread, const char *name, 53 void *(*start_routine)(void *), 54 void *arg, int mode); 55 void *qemu_thread_join(QemuThread *thread); 56 void qemu_thread_get_self(QemuThread *thread); 57 bool qemu_thread_is_self(QemuThread *thread); 58 void qemu_thread_exit(void *retval); 59 void qemu_thread_naming(bool enable); 60 61 struct Notifier; 62 void qemu_thread_atexit_add(struct Notifier *notifier); 63 void qemu_thread_atexit_remove(struct Notifier *notifier); 64 65 typedef struct QemuSpin { 66 int value; 67 } QemuSpin; 68 69 static inline void qemu_spin_init(QemuSpin *spin) 70 { 71 __sync_lock_release(&spin->value); 72 } 73 74 static inline void qemu_spin_lock(QemuSpin *spin) 75 { 76 while (unlikely(__sync_lock_test_and_set(&spin->value, true))) { 77 while (atomic_read(&spin->value)) { 78 cpu_relax(); 79 } 80 } 81 } 82 83 static inline bool qemu_spin_trylock(QemuSpin *spin) 84 { 85 return __sync_lock_test_and_set(&spin->value, true); 86 } 87 88 static inline bool qemu_spin_locked(QemuSpin *spin) 89 { 90 return atomic_read(&spin->value); 91 } 92 93 static inline void qemu_spin_unlock(QemuSpin *spin) 94 { 95 __sync_lock_release(&spin->value); 96 } 97 98 #endif 99