09/06/13 01:31:37
csを獲得済みだから
URLﾘﾝｸ(msdn.microsoft.com)
After a thread has ownership of a critical section, it can make additional calls to EnterCriticalSection or TryEnterCriticalSection without blocking its execution.
This prevents a thread from deadlocking itself while waiting for a critical section that it already owns.
The thread enters the critical section each time EnterCriticalSection and TryEnterCriticalSection succeed.
A thread must call LeaveCriticalSection once for each time that it entered the critical section.