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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
// -----------------------------------------------------------------------------------------------------------
//
// Helper classes expected by the GC
//
#define CRST_REENTRANCY 0
#define CRST_UNSAFE_SAMELEVEL 0
#define CRST_UNSAFE_ANYMODE 0
#define CRST_DEBUGGER_THREAD 0
#define CRST_DEFAULT 0
#define CrstHandleTable 0
typedef int CrstFlags;
typedef int CrstType;
class CrstStatic
{
CLRCriticalSection m_cs;
#ifdef _DEBUG
EEThreadId m_holderThreadId;
#endif
public:
bool InitNoThrow(CrstType eType, CrstFlags eFlags = CRST_DEFAULT)
{
m_cs.Initialize();
return true;
}
void Destroy()
{
m_cs.Destroy();
}
void Enter()
{
m_cs.Enter();
#ifdef _DEBUG
m_holderThreadId.SetToCurrentThread();
#endif
}
void Leave()
{
#ifdef _DEBUG
m_holderThreadId.Clear();
#endif
m_cs.Leave();
}
#ifdef _DEBUG
EEThreadId GetHolderThreadId()
{
return m_holderThreadId;
}
bool OwnedByCurrentThread()
{
return GetHolderThreadId().IsCurrentThread();
}
#endif
};
class CrstHolder
{
CrstStatic * m_pLock;
public:
CrstHolder(CrstStatic * pLock)
: m_pLock(pLock)
{
m_pLock->Enter();
}
~CrstHolder()
{
m_pLock->Leave();
}
};
class CrstHolderWithState
{
CrstStatic * m_pLock;
bool m_fAcquired;
public:
CrstHolderWithState(CrstStatic * pLock, bool fAcquire = true)
: m_pLock(pLock), m_fAcquired(fAcquire)
{
if (fAcquire)
m_pLock->Enter();
}
~CrstHolderWithState()
{
if (m_fAcquired)
m_pLock->Leave();
}
void Acquire()
{
if (!m_fAcquired)
{
m_pLock->Enter();
m_fAcquired = true;
}
}
void Release()
{
if (m_fAcquired)
{
m_pLock->Leave();
m_fAcquired = false;
}
}
CrstStatic * GetValue()
{
return m_pLock;
}
};
class CLREventStatic
{
public:
bool CreateAutoEventNoThrow(bool bInitialState);
bool CreateManualEventNoThrow(bool bInitialState);
bool CreateOSAutoEventNoThrow(bool bInitialState);
bool CreateOSManualEventNoThrow(bool bInitialState);
void CloseEvent();
bool IsValid() const;
bool Set();
bool Reset();
uint32_t Wait(uint32_t dwMilliseconds, bool bAlertable);
private:
HANDLE m_hEvent;
bool m_fInitialized;
};
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