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#pragma once
#include <mutex>
#include <thread>
class cCriticalSection
{
public:
void Lock(void);
void Unlock(void);
// IsLocked / IsLockedByCurrentThread are only used in ASSERT statements, but because of the changes with ASSERT they must always be defined
// The fake versions (in Release) will not effect the program in any way
#ifdef _DEBUG
cCriticalSection(void);
bool IsLocked(void);
bool IsLockedByCurrentThread(void);
#else
bool IsLocked(void) { return false; }
bool IsLockedByCurrentThread(void) { return false; }
#endif // _DEBUG
private:
#ifdef _DEBUG
int m_IsLocked; // Number of times this CS is locked
std::thread::id m_OwningThreadID;
#endif // _DEBUG
std::recursive_mutex m_Mutex;
} ALIGN_8;
/** RAII for cCriticalSection - locks the CS on creation, unlocks on destruction */
class cCSLock
{
cCriticalSection * m_CS;
// Unlike a cCriticalSection, this object should be used from a single thread, therefore access to m_IsLocked is not threadsafe
// In Windows, it is an error to call cCriticalSection::Unlock() multiple times if the lock is not held,
// therefore we need to check this value whether we are locked or not.
bool m_IsLocked;
public:
cCSLock(cCriticalSection * a_CS);
cCSLock(cCriticalSection & a_CS);
~cCSLock();
// Temporarily unlock or re-lock:
void Lock(void);
void Unlock(void);
private:
DISALLOW_COPY_AND_ASSIGN(cCSLock);
} ;
/** Temporary RAII unlock for a cCSLock. Useful for unlock-wait-relock scenarios */
class cCSUnlock
{
cCSLock & m_Lock;
public:
cCSUnlock(cCSLock & a_Lock);
~cCSUnlock();
private:
DISALLOW_COPY_AND_ASSIGN(cCSUnlock);
} ;
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