关于windows内核下的读写锁

关于windows内核下的读写锁

2013-01-30 21:37 67人阅读 评论(0) 收藏 举报

目录(?)[+]

ERESOURCE对象-》》相当于读写锁，即用于同时只能有一个WRITER写入，多个READER读的情况：

ExInitializeResourceLite 初始化一个ERESOURCE对象；

ExAcquireResourceExclusiveLite 用于获取ERESOURCE(写访问)；

ExAcquireResourceSharedLite 用于获取ERESOURCE(读访问)；

ExReleaseResourceLite用于释放ERESOURCE；

ERESOURCE HashResource = {0};

ExInitializeResourceLite( &HashResource );

ExAcquireResourceExclusiveLite( &HashResource, TRUE );
//写访问
ExReleaseResourceLite( &HashResource );

ExAcquireResourceSharedLite( &HashResource, TRUE );

//读访问

ExReleaseResourceLite( &HashResource );

NTSTATUS ExReinitializeResourceLite(
  _Inout_  PERESOURCE Resource
);

Parameters

Resource [in, out]

A pointer to the caller-supplied resource variable to be reinitialized.

Return value

ExReinitializeResourceLite returns STATUS_SUCCESS.

Version	Available in Windows 2000 and later versions of Windows.
Header	Wdm.h (include Wdm.h, Ntddk.h, or Ntifs.h)
Library	Contained in Ntoskrnl.lib.
IRQL	<= DISPATCH_LEVEL