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282 lines
7.6 KiB
282 lines
7.6 KiB
/*==LICENSE==* |
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CyanWorlds.com Engine - MMOG client, server and tools |
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Copyright (C) 2011 Cyan Worlds, Inc. |
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This program is free software: you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation, either version 3 of the License, or |
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(at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
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along with this program. If not, see <http://www.gnu.org/licenses/>. |
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Additional permissions under GNU GPL version 3 section 7 |
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If you modify this Program, or any covered work, by linking or |
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combining it with any of RAD Game Tools Bink SDK, Autodesk 3ds Max SDK, |
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NVIDIA PhysX SDK, Microsoft DirectX SDK, OpenSSL library, Independent |
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JPEG Group JPEG library, Microsoft Windows Media SDK, or Apple QuickTime SDK |
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(or a modified version of those libraries), |
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containing parts covered by the terms of the Bink SDK EULA, 3ds Max EULA, |
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PhysX SDK EULA, DirectX SDK EULA, OpenSSL and SSLeay licenses, IJG |
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JPEG Library README, Windows Media SDK EULA, or QuickTime SDK EULA, the |
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licensors of this Program grant you additional |
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permission to convey the resulting work. Corresponding Source for a |
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non-source form of such a combination shall include the source code for |
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the parts of OpenSSL and IJG JPEG Library used as well as that of the covered |
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work. |
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You can contact Cyan Worlds, Inc. by email legal@cyan.com |
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or by snail mail at: |
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Cyan Worlds, Inc. |
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14617 N Newport Hwy |
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Mead, WA 99021 |
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*==LICENSE==*/ |
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#ifndef hsThread_Defined |
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#define hsThread_Defined |
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#include "hsTypes.h" |
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typedef UInt32 hsMilliseconds; |
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#if HS_BUILD_FOR_WIN32 |
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#include "hsWindows.h" |
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#elif HS_BUILD_FOR_UNIX |
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#include <pthread.h> |
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#include <semaphore.h> |
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// We can't wait with a timeout with semas |
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#define USE_SEMA |
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// Linux kernel 2.4 w/ NTPL threading patch and O(1) scheduler |
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// seems to have a problem in it's cond_t implementation that |
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// causes a hang under heavy load. This is a workaround that |
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// uses select() and pipes. |
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// #define PSEUDO_EVENT |
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#endif |
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class hsThread |
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{ |
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public: |
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#if HS_BUILD_FOR_WIN32 |
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typedef DWORD ThreadId; |
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#elif HS_BUILD_FOR_UNIX |
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typedef pthread_t ThreadId; |
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#endif |
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private: |
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hsBool fQuit; |
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UInt32 fStackSize; |
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#if HS_BUILD_FOR_WIN32 |
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ThreadId fThreadId; |
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HANDLE fThreadH; |
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HANDLE fQuitSemaH; |
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#elif HS_BUILD_FOR_UNIX |
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ThreadId fPThread; |
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hsBool fIsValid; |
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pthread_mutex_t fMutex; |
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#endif |
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protected: |
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hsBool GetQuit() const { return hsBool(fQuit); } |
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void SetQuit(hsBool value) { fQuit = value; } |
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public: |
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hsThread(UInt32 stackSize = 0); |
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virtual ~hsThread(); // calls Stop() |
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#if HS_BUILD_FOR_WIN32 |
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ThreadId GetThreadId() { return fThreadId; } |
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static ThreadId GetMyThreadId() { return GetCurrentThreadId(); } |
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#elif HS_BUILD_FOR_UNIX |
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ThreadId GetThreadId() { return fPThread; } |
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static ThreadId GetMyThreadId() { return pthread_self(); } |
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pthread_mutex_t* GetStartupMutex() { return &fMutex; } |
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#endif |
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virtual hsError Run() = 0; // override this to do your work |
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virtual void Start(); // initializes stuff and calls your Run() method |
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virtual void Stop(); // sets fQuit = true and the waits for the thread to stop |
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// Static functions |
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static void* Alloc(size_t size); // does not call operator::new(), may return nil |
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static void Free(void* p); // does not call operator::delete() |
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static void ThreadYield(); |
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#if HS_BUILD_FOR_WIN32 |
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DWORD WinRun(); |
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#endif |
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}; |
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////////////////////////////////////////////////////////////////////////////// |
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class hsMutex { |
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#if HS_BUILD_FOR_WIN32 |
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HANDLE fMutexH; |
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#elif HS_BUILD_FOR_UNIX |
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pthread_mutex_t fPMutex; |
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#endif |
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public: |
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hsMutex(); |
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virtual ~hsMutex(); |
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void Lock(); |
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hsBool TryLock(); |
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void Unlock(); |
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}; |
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class hsTempMutexLock { |
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hsMutex* fMutex; |
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public: |
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hsTempMutexLock(hsMutex* mutex) : fMutex(mutex) |
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{ |
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fMutex->Lock(); |
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} |
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hsTempMutexLock(hsMutex& mutex) : fMutex(&mutex) |
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{ |
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fMutex->Lock(); |
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} |
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~hsTempMutexLock() |
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{ |
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fMutex->Unlock(); |
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} |
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}; |
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////////////////////////////////////////////////////////////////////////////// |
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class hsSemaphore { |
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#if HS_BUILD_FOR_WIN32 |
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HANDLE fSemaH; |
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#elif HS_BUILD_FOR_UNIX |
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#ifdef USE_SEMA |
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sem_t fPSema; |
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#else |
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pthread_mutex_t fPMutex; |
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pthread_cond_t fPCond; |
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Int32 fCounter; |
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#endif |
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#endif |
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public: |
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#ifdef HS_BUILD_FOR_WIN32 |
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hsSemaphore(int initialValue=0, const char *name=nil); |
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#else |
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hsSemaphore(int initialValue=0); |
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#endif |
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~hsSemaphore(); |
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hsBool Wait(hsMilliseconds timeToWait = kPosInfinity32); |
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void Signal(); |
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}; |
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////////////////////////////////////////////////////////////////////////////// |
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class hsEvent |
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{ |
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#if HS_BUILD_FOR_UNIX |
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#ifndef PSEUDO_EVENT |
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pthread_mutex_t fMutex; |
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pthread_cond_t fCond; |
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hsBool fTriggered; |
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#else |
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enum { kRead, kWrite }; |
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int fFds[2]; |
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hsMutex fWaitLock; |
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hsMutex fSignalLock; |
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#endif // PSEUDO_EVENT |
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#elif HS_BUILD_FOR_WIN32 |
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HANDLE fEvent; |
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#endif |
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public: |
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hsEvent(); |
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~hsEvent(); |
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hsBool Wait(hsMilliseconds timeToWait = kPosInfinity32); |
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void Signal(); |
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}; |
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////////////////////////////////////////////////////////////////////////////// |
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class hsSleep |
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{ |
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public: |
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#if HS_BUILD_FOR_UNIX |
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static void Sleep(UInt32 millis); |
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#elif HS_BUILD_FOR_WIN32 |
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static void Sleep(UInt32 millis) { ::Sleep(millis); } |
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#endif |
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}; |
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////////////////////////////////////////////////////////////////////////////// |
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// Allows multiple readers, locks out readers for writing. |
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class hsReaderWriterLock |
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{ |
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public: |
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struct Callback |
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{ |
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virtual void OnLockingForRead( hsReaderWriterLock * lock ) {} |
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virtual void OnLockedForRead( hsReaderWriterLock * lock ) {} |
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virtual void OnUnlockingForRead( hsReaderWriterLock * lock ) {} |
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virtual void OnUnlockedForRead( hsReaderWriterLock * lock ) {} |
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virtual void OnLockingForWrite( hsReaderWriterLock * lock ) {} |
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virtual void OnLockedForWrite( hsReaderWriterLock * lock ) {} |
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virtual void OnUnlockingForWrite( hsReaderWriterLock * lock ) {} |
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virtual void OnUnlockedForWrite( hsReaderWriterLock * lock ) {} |
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}; |
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hsReaderWriterLock( const char * name="<unnamed>", Callback * cb=nil ); |
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~hsReaderWriterLock(); |
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void LockForReading(); |
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void UnlockForReading(); |
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void LockForWriting(); |
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void UnlockForWriting(); |
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const char * GetName() const { return fName; } |
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private: |
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int fReaderCount; |
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hsMutex fReaderCountLock; |
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hsMutex fReaderLock; |
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hsSemaphore fWriterSema; |
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Callback * fCallback; |
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char * fName; |
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}; |
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class hsLockForReading |
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{ |
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hsReaderWriterLock * fLock; |
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public: |
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hsLockForReading( hsReaderWriterLock & lock ): fLock( &lock ) |
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{ |
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fLock->LockForReading(); |
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} |
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hsLockForReading( hsReaderWriterLock * lock ): fLock( lock ) |
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{ |
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fLock->LockForReading(); |
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} |
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~hsLockForReading() |
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{ |
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fLock->UnlockForReading(); |
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} |
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}; |
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class hsLockForWriting |
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{ |
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hsReaderWriterLock * fLock; |
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public: |
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hsLockForWriting( hsReaderWriterLock & lock ): fLock( &lock ) |
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{ |
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fLock->LockForWriting(); |
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} |
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hsLockForWriting( hsReaderWriterLock * lock ): fLock( lock ) |
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{ |
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fLock->LockForWriting(); |
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} |
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~hsLockForWriting() |
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{ |
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fLock->UnlockForWriting(); |
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} |
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}; |
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#endif |
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