android note

2013-11-07

互斥类 -- Mutex

customize/native/include/utils/Mutex.h

a. Mutex

b. AutoLock

条件类 -- Condition

customize/native/include/utils/Condition.h

inline status_t Condition::wait(Mutex& mutex) {
    return -pthread_cond_wait(&mCond, &mutex.mMutex);
}

inline status_t Condition::waitRelative(Mutex& mutex, nsecs_t reltime) ;

inline void Condition::signal() {
    pthread_cond_signal(&mCond);
}
inline void Condition::broadcast() {
    pthread_cond_broadcast(&mCond);
}

原子操作函数

system/core/include/cutils/

extern inline int32_t android_atomic_inc(volatile int32_t *addr)
{
    return android_atomic_add(1, addr);
}


extern inline int32_t android_atomic_dec(volatile int32_t *addr)
{
    return android_atomic_add(-1, addr);
}

extern inline int32_t android_atomic_and(int32_t value, volatile int32_t *ptr);

extern inline int32_t android_atomic_or(int32_t value, volatile int32_t *ptr);