OW_ThreadTypes.hpp

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00001 /*******************************************************************************
00002 * Copyright (C) 2001-2004 Vintela, Inc. All rights reserved.
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00004 * Redistribution and use in source and binary forms, with or without
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00011 *    this list of conditions and the following disclaimer in the documentation
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00014 *  - Neither the name of Vintela, Inc. nor the names of its
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00030 
00036 #ifndef OW_THREAD_TYPES_HPP_
00037 #define OW_THREAD_TYPES_HPP_
00038 #include "OW_config.h"
00039 
00040 // The classes and functions defined in this file are not meant for general
00041 // use, they are internal implementation details.  They may change at any time.
00042 
00043 #if defined(OW_USE_PTHREAD)
00044 
00045    #include <pthread.h>
00046 
00047    namespace OW_NAMESPACE
00048    {
00049 
00050       // Platform specific thread type
00051       typedef pthread_t       Thread_t;
00052       typedef pthread_mutex_t NativeMutex_t;
00053       struct NonRecursiveMutex_t
00054       {
00055          pthread_mutex_t mutex;
00056       };
00057 
00058       #if defined(OW_HAVE_PTHREAD_MUTEXATTR_SETTYPE)
00059       // Platform specific mutex type
00060       // we have native recursive mutexes.
00061       struct Mutex_t
00062       {
00063          pthread_mutex_t mutex;
00064       };
00065 
00066       #else
00067 
00068       // we have to emulate recursive mutexes.
00069       struct Mutex_t
00070       {
00071          pthread_mutex_t mutex;
00072          pthread_cond_t unlocked;
00073          bool valid_id;
00074          unsigned count;
00075          pthread_t thread_id;
00076       };
00077       #endif
00078 
00079       // Platform specific conditional variable type
00080       typedef pthread_cond_t        ConditionVar_t;
00081       struct NonRecursiveMutexLockState
00082       {
00083          pthread_t thread_id;
00084          NativeMutex_t* pmutex;
00085       };
00086 
00087    } // end namespace OW_NAMESPACE
00088 
00089 #elif defined(OW_WIN32)
00090 
00091    namespace OW_NAMESPACE
00092    {
00093       // Platform specific thread type
00094       typedef DWORD Thread_t;
00095       typedef HANDLE NativeMutex_t;
00096       typedef HANDLE NonRecursiveMutex_t;
00097       typedef LPCRITICAL_SECTION Mutex_t;
00098 
00099       // Platform specific conditional variable type
00100       typedef struct
00101       {
00102          // Number of waiting threads
00103          int waitersCount;
00104          // Serialize access to waitersCount
00105          CRITICAL_SECTION waitersCountLock;
00106          // Semaphore used to queue up threads waiting for the condition to
00107          // become signaled
00108             HANDLE queue;
00109          // An auto-reset event used during broadcasting to wait for all the 
00110          // threads to wake up and be released from the queue
00111          HANDLE waitersDone;
00112          // Keeps track of whether we are broadcasting or signaling. This allows
00113          // for optimization if just signaling.
00114          bool wasBroadcast;
00115       } ConditionInfo_t;
00116 
00117       typedef ConditionInfo_t* ConditionVar_t;
00118       //typedef void*         ConditionVar_t;
00119       struct NonRecursiveMutexLockState
00120       {
00121          DWORD thread_id;
00122          NativeMutex_t* pmutex;
00123       };
00124 
00125    } // end namespace OW_NAMESPACE
00126 
00127 #endif
00128 
00129 #endif   // #ifndef OW_THREAD_TYPES_HPP_
00130             

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