1 #ifndef QEMU_THREAD_H 2 #define QEMU_THREAD_H 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 /* Prototypes for other functions are in thread-posix.h/thread-win32.h. */ 29 void qemu_rec_mutex_init(QemuRecMutex *mutex); 30 31 void qemu_cond_init(QemuCond *cond); 32 void qemu_cond_destroy(QemuCond *cond); 33 34 /* 35 * IMPORTANT: The implementation does not guarantee that pthread_cond_signal 36 * and pthread_cond_broadcast can be called except while the same mutex is 37 * held as in the corresponding pthread_cond_wait calls! 38 */ 39 void qemu_cond_signal(QemuCond *cond); 40 void qemu_cond_broadcast(QemuCond *cond); 41 void qemu_cond_wait(QemuCond *cond, QemuMutex *mutex); 42 43 void qemu_sem_init(QemuSemaphore *sem, int init); 44 void qemu_sem_post(QemuSemaphore *sem); 45 void qemu_sem_wait(QemuSemaphore *sem); 46 int qemu_sem_timedwait(QemuSemaphore *sem, int ms); 47 void qemu_sem_destroy(QemuSemaphore *sem); 48 49 void qemu_event_init(QemuEvent *ev, bool init); 50 void qemu_event_set(QemuEvent *ev); 51 void qemu_event_reset(QemuEvent *ev); 52 void qemu_event_wait(QemuEvent *ev); 53 void qemu_event_destroy(QemuEvent *ev); 54 55 void qemu_thread_create(QemuThread *thread, const char *name, 56 void *(*start_routine)(void *), 57 void *arg, int mode); 58 void *qemu_thread_join(QemuThread *thread); 59 void qemu_thread_get_self(QemuThread *thread); 60 bool qemu_thread_is_self(QemuThread *thread); 61 void qemu_thread_exit(void *retval); 62 void qemu_thread_naming(bool enable); 63 64 struct Notifier; 65 void qemu_thread_atexit_add(struct Notifier *notifier); 66 void qemu_thread_atexit_remove(struct Notifier *notifier); 67 68 typedef struct QemuSpin { 69 int value; 70 } QemuSpin; 71 72 static inline void qemu_spin_init(QemuSpin *spin) 73 { 74 __sync_lock_release(&spin->value); 75 } 76 77 static inline void qemu_spin_lock(QemuSpin *spin) 78 { 79 while (unlikely(__sync_lock_test_and_set(&spin->value, true))) { 80 while (atomic_read(&spin->value)) { 81 cpu_relax(); 82 } 83 } 84 } 85 86 static inline bool qemu_spin_trylock(QemuSpin *spin) 87 { 88 return __sync_lock_test_and_set(&spin->value, true); 89 } 90 91 static inline bool qemu_spin_locked(QemuSpin *spin) 92 { 93 return atomic_read(&spin->value); 94 } 95 96 static inline void qemu_spin_unlock(QemuSpin *spin) 97 { 98 __sync_lock_release(&spin->value); 99 } 100 101 #endif 102