★★★ 怎么使用void InitializeCriticalSection(LPCRITICAL_SECTION lpCriticalSection)的参数?

Question

VOID InitializeCriticalSection(
  LPCRITICAL_SECTION lpCriticalSection   // address of critical 
                                         // section object
);// 怎么设置参数lpCriticalSection?LPCRITICAL_SECTION lpCriticalSection;lpCriticalSection->LockCount =?;
lpCriticalSection->LockSemaphore =  ?
lpCriticalSection->DebugInfo = ?
  ...InitializeCriticalSection(lpCriticalSection);
MSDN中 找不到lpCriticalSection的参数说明,请教怎么设置它们?

Answer 1

如果不初始化有一个编译警告的,我想应该初始化它的,但是看了MSDN就是找不到它的结构说明,我是中文版(2CD)的.谢谢大家帮我看看...

Answer 2

LPCRITICAL_SECTION lpCriticalSection;... 这里怎么设置 lpCriticalSection?  // 肯定得初始化,否则下面就出地址无效的错误InitializeCriticalSection(lpCriticalSection);

Answer 3

typedef struct _RTL_CRITICAL_SECTION {
    LONG LockCount;
    LONG RecursionCount;
    HANDLE OwningThread;        // from the thread's ClientId->UniqueThread
    HANDLE LockSemaphore;
    DWORD SpinCount;
} *lpCriticalSection;怎么设置? help me...

Answer 4

msdn上的例子
Using Critical Section Objects
The following example shows how a thread initializes, enters, and leaves a critical section. As with the mutex example (see Using Mutex Objects), this example uses structured exception-handling syntax to ensure that the thread calls the LeaveCriticalSection function to release its ownership of the critical section object. CRITICAL_SECTION CriticalSection; // Initialize the critical section.
InitializeCriticalSection(&CriticalSection); // Request ownership of the critical section.
__try 
{
    EnterCriticalSection(&CriticalSection);     // Access the shared resource.
}
__finally 
{
    // Release ownership of the critical section.
    LeaveCriticalSection(&CriticalSection);    // Release resources used by the critical section object.
    DeleteCriticalSection(&CriticalSection)
}

Answer 5

给你代码,未运行测试,应该没有什么问题的.H
class CMyList  
{
protected:
CStringArray m_arr; //MFC类库的数组
CRITICAL_SECTION m_cs; //关键区对象,注意,不是指针!!
public:
int Count();
CString GetAt(int nIndex);
void Add(const CString& s);
CMyList();
virtual ~CMyList();

};CPP...............CMyList::CMyList()
{
//初始化关键区
InitializeCriticalSection( &m_cs); 
}CMyList::~CMyList()
{
//删除关键区
DeleteCriticalSection(&m_cs);}
void CMyList::Add(const CString &s)
{
//进入
EnterCriticalSection(&m_cs); m_arr.Add (s);
//离开
LeaveCriticalSection(&m_cs);
}//下边代码应该有长度监测之类的过程,忽略
CString CMyList::GetAt(int nIndex)
{
//进入
EnterCriticalSection(&m_cs); CString s=m_arr.GetAt (nIndex); //离开
LeaveCriticalSection(&m_cs);
return s;
}int CMyList::Count()
{
//进入
EnterCriticalSection(&m_cs);
int nCnt=m_arr.GetSize ();
//离开
LeaveCriticalSection(&m_cs);
return nCnt;
}