Mutex

发布时间：2010-2-11 12:19
分类名称：windows

       Usage count         

       Thread ID                    identifies which thread in the system currently owns the mutex.

       Recursion counter     indicates the number of times that this thread owns the mutex.

Usage

l  If the thread ID is 0 (an invalid thread ID), the mutex is not owned by any thread and is signaled.

l  If the thread ID is a nonzero value, a thread owns the mutex and the mutex is nonsignaled.

l  The system checks to see whether the thread attempting to acquire the mutex has the same thread ID as recorded inside the mutex object. If the thread IDs match, the system allows the thread to remain schedulable—even though the mutex was nonsignaled.

Functions:

       HANDLE CreateMutex(

   PSECURITY_ATTRIBUTES psa,

   BOOL bInitialOwner,

   PCTSTR pszName);

HANDLE CreateMutexEx(

   PSECURITY_ATTRIBUTES psa,

   PCTSTR pszName,

   DWORD dwFlags,

   DWORD dwDesiredAccess);

HANDLE OpenMutex(

   DWORD dwDesiredAccess,

   BOOL bInheritHandle,

   PCTSTR pszName);