98 lines
2.2 KiB
C++
98 lines
2.2 KiB
C++
//
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// Kernel-mode utility classes for minidrivers
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//
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#ifndef _UTIL_H_
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#define _UTIL_H_
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//
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// _purecall must be defined in the main compile unit, not in a library
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//
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// the driver must define DECLARE_PURECALL once exactly somewhere
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#ifdef DECLARE_PURECALL
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// to handle pure virtual functions
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// -- this is needed to complete the link, and can be
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// called eg when a base class destructor calls a method
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// that is only defined in a derived class.
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//
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// Alas it does not seem to be loaded correctly from a library
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// and thus must be in the main module
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extern "C" int _cdecl _purecall()
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{
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ASSERT(FALSE);
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return 0;
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}
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#endif
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#ifndef NO_GLOBAL_FUNCTION
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extern BOOL StartThread(HANDLE hHandle, void(*p_Function)(void *), PVOID p_Context);
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extern BOOL StopThread();
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extern void Delay(int iTime);
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extern PVOID AllocateFixedMemory(UINT uiSize);
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extern void FreeFixedMemory(PVOID p_vBuffer);
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extern void MemoryCopy(VOID *p_Destination, CONST VOID *p_Source, ULONG ulLength);
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extern NTSTATUS GetRegistryValue(IN HANDLE Handle, IN PWCHAR KeyNameString,
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IN ULONG KeyNameStringLength, IN PWCHAR Data, IN ULONG DataLength);
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extern BOOL StringsEqual(PWCHAR pwc1, PWCHAR pwc2);
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extern BOOL ConvertToNumber(PWCHAR sLine, PULONG pulNumber);
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extern BOOL ConvertNumberToString(PWCHAR sLine, ULONG ulNumber) ;
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#endif // NO_GLOBAL_FUNCTION
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// mutex wrapper and auto lock/unlock class
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class CMutex
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{
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public:
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CMutex(ULONG level = 1)
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{
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KeInitializeMutex(&m_Mutex, level);
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}
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void Lock() {
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KeWaitForSingleObject(&m_Mutex, Executive, KernelMode, false, NULL);
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}
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void Unlock() {
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KeReleaseMutex(&m_Mutex, false);
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}
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private:
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KMUTEX m_Mutex;
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};
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// use c++ ctor/dtor framework to ensure unlocking
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class CAutoMutex
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{
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public:
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CAutoMutex(CMutex* pLock)
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: m_pLock(pLock)
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{
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m_pLock->Lock();
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}
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~CAutoMutex()
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{
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m_pLock->Unlock();
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}
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private:
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CMutex* m_pLock;
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};
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class CPhilTimer
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{
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public:
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CPhilTimer();
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~CPhilTimer();
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BOOL Set(int iTimePeriod);
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void Cancel();
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BOOL Wait(int iTimeOut);
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private:
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KTIMER m_Timer;
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};
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#endif // _UTIL_H_
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