多线程访问共享锁和独占锁

SRWLOCK     g_sCallNumberMapRwLock;

//初始化

InitializeSRWLock(&g_sCallNumberMapRwLock);

//独占锁的占用和释放

AcquireSRWLockExclusive(&g_sCallNumberMapRwLock);

ReleaseSRWLockExclusive(&g_sCallNumberMapRwLock);

//共享锁的占用和释放

AcquireSRWLockShared(&g_sCallNumberMapRwLock);

ReleaseSRWLockShared(&g_sCallNumberMapRwLock);