how to create a global singleton object in exe Monday, January 11, 2010

// how to create a global singleton object
const TInt KMarkTlsHandle = 0xC0FFEE;

class CYourClass: public CBase
{
public:
CYourClass(){};
void ConstructL(){};
~CYourClass();
};



CYourClass::~CYourClass()
{

//release TLS
UserSvr::DllFreeTls(KMarkTlsHandle);
}



//how to create a global singleton object
void CMarkEComWrapper::DoCommandCreateSingletonObject()
{
TInt err = KErrNone;

//Get object from STL
CYourClass* iSingletonObject = static_cast (UserSvr::DllTls(KMarkTlsHandle));

//if not, create one
if (!iSingletonObject)
{
iSingletonObject = new (ELeave) CYourClass;
CleanupStack::PushL(iSingletonObject);
iSingletonObject->ConstructL();
err = UserSvr::DllSetTls( KMarkTlsHandle, iSingletonObject );
CleanupStack::Pop(iSingletonObject);
}

delete iSingletonObject ;

iSingletonObject = 0;
}

List all drivers via DOS command

Command:  fsutil fsinfo drives

Detailed descriptions belowing:

Options for fsutil

• behavior 控制文件系统行为
• dirty 管理卷的被损坏的位数
• file 文件特定命令
• fsinfo 文件系统信息
• hardlink 硬链接管理
• objectid 对象 ID 管理
• quota 配额管理
• reparsepoint 重分析点管理
• sparse 稀疏文件控制
• usn USN 管理
• volume 卷管理

options for FSINFO

• drives 列出所有驱动器
• drivetype 查询一个驱动器的驱动器类型
• volumeinfo 查询卷信息
• ntfsinfo 查询 NTFS 特定卷信息
• statistics 查询文件系统统计