Windows Thread Synchronization in User Mode

HoBoss

于 2008-02-29 16:56:00 发布

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文章标签： thread windows user function

本文链接：https://blog.youkuaiyun.com/HoBoss/article/details/2133838

本文介绍了Windows环境下实现线程同步的两种方法：Interlocked系列函数和临界区（CriticalSection）。Interlocked函数用于进行原子操作，而临界区则通过加锁解锁机制保护共享资源。文中还详细讨论了临界区的初始化及设置自旋计数。

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1 The Interlocked Family of Functions

LONG InterlockedExchangeAdd( PLONG plAddend, LONG lIncrement ); ....

2 volatile

3 Critical Sections

CRITICAL_SECTION

    VOID InitializeCriticalSection(PCRITICAL_SECTION pcs);

    BOOL InitializeCriticalSectionAndSpinCount(PCRITICAL_SECTION pcs, DWORD dwSpinCount);
    
    DWORD SetCriticalSectionSpinCount(PCRITICAL_SECTION pcs, DWORD dwSpinCount);

    If you call this function while running on a single processor machine,

    the dwSpinCount parameter is ignored and the count is always set to 0.

    This is good because setting a spin count on a single-processor machine

    is useless: the thread owning the resource can't relinquish it if another

    thread is spinning.
 
    ......