iokit/Kernel/IOSyncer.cpp

52     if (!(guardLock = IOSimpleLockAlloc()) )
55     IOSimpleLockInit(guardLock);
69     IOInterruptState is = IOSimpleLockLockDisableInterrupt(guardLock);
71     IOSimpleLockUnlockEnableInterrupt(guardLock, is);
79     if (guardLock != NULL)
80        IOSimpleLockFree(guardLock);
87     IOInterruptState is = IOSimpleLockLockDisableInterrupt(guardLock);
91     	IOSimpleLockUnlockEnableInterrupt(guardLock, is);
95         IOSimpleLockUnlockEnableInterrupt(guardLock, is);
116          IOInterruptState is = IOSimpleLockLockDisableInterrupt(guardLock);
119          IOSimpleLockUnlockEnableInterrupt(guardLock, is);