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author | Mattes D <github@xoft.cz> | 2013-11-27 09:23:17 +0100 |
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committer | Mattes D <github@xoft.cz> | 2013-11-27 09:23:17 +0100 |
commit | 49760db89d94ede5d123d927141a6cd60dbaaf07 (patch) | |
tree | 6c6cf99e4cf3128311a93cd187947b502f3732a0 /src/OSSupport/CriticalSection.h | |
parent | cWorld::SpawnExperienceOrb() now returns the entity ID of the spawned orb. (diff) | |
parent | Fixed VC2008 compilation, normalized include paths. (diff) | |
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Diffstat (limited to 'src/OSSupport/CriticalSection.h')
-rw-r--r-- | src/OSSupport/CriticalSection.h | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/src/OSSupport/CriticalSection.h b/src/OSSupport/CriticalSection.h new file mode 100644 index 000000000..1bfe81439 --- /dev/null +++ b/src/OSSupport/CriticalSection.h @@ -0,0 +1,80 @@ + +#pragma once + + + + + +class cCriticalSection +{ +public: + cCriticalSection(void); + ~cCriticalSection(); + + void Lock(void); + void Unlock(void); + + #ifdef _DEBUG + bool IsLocked(void); + bool IsLockedByCurrentThread(void); + #endif // _DEBUG + +private: + #ifdef _DEBUG + int m_IsLocked; // Number of times this CS is locked + unsigned long m_OwningThreadID; + #endif // _DEBUG + + #ifdef _WIN32 + CRITICAL_SECTION m_CriticalSection; + #else // _WIN32 + pthread_mutex_t m_CriticalSection; + pthread_mutexattr_t m_Attributes; + #endif // else _WIN32 +} 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); +} ; + + + + |