1. 利用互斥对象实现线程同步互斥对象（mutex)属于内核对象,主要函数：
The CreateMutex function creates or opens a named or unnamed mutex object.
HANDLE CreateMutex(
LPSECURITY_ATTRIBUTES lpMutexAttributes,
BOOL bInitialOwner,
LPCTSTR lpName
);
The ReleaseMutex function releases ownership of the specified mutex object.
BOOL ReleaseMutex(
HANDLE hMutex
);
The WaitForSingleObject function returns when one of the following occurs:
- The specified object is in the signaled state.
- The time-out interval elapses.
To enter an alertable wait state, use the WaitForSingleObjectEx function. To wait for multiple objects, use the WaitForMultipleObjects.
DWORD WaitForSingleObject(
HANDLE hHandle,
DWORD dwMilliseconds
);
2. 利用事件对象实现线程同步
主要函数：
The CreateEvent function creates or opens a named or unnamed event object.
HANDLE CreateEvent(
LPSECURITY_ATTRIBUTES lpEventAttributes,
BOOL bManualReset,
BOOL bInitialState,
LPCTSTR lpName
);
The SetEvent function sets the specified event object to the signaled state.
BOOL SetEvent(
HANDLE hEvent
);
The ResetEvent function sets the specified event object to the nonsignaled state.
BOOL ResetEvent(
HANDLE hEvent
);
3. 关键代码
关键代码段， 也称为临界区，工作在用户方式下。它是指一个小代码段，在代码能够执行前，它必须独占对某些资源的访问权
主要函数：
The InitializeCriticalSection function initializes a critical section object.
void InitializeCriticalSection(
LPCRITICAL_SECTION lpCriticalSection
);
The EnterCriticalSection function waits for ownership of the specified critical section object. The function returns when the calling thread is granted ownership.
void EnterCriticalSection(
LPCRITICAL_SECTION lpCriticalSection
);
The LeaveCriticalSection function releases ownership of the specified critical section object.
void LeaveCriticalSection(
LPCRITICAL_SECTION lpCriticalSection
);
三种方法的区别在于：
互斥对象和事件都属于内核对象，利用内核对象进行线程同步时速度较慢，但利用这两种方法可以在多个进程的各个线程间进行同步
关键代码段工作方式下，同步速度较快， 但很容易产生死锁，因为在等待进入关键代码段时无法设定超时值