ThreadTypes.hpp

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#ifndef BLOCXX_THREAD_TYPES_HPP_
#define BLOCXX_THREAD_TYPES_HPP_
#include "blocxx/BLOCXX_config.h"
 
// The classes and functions defined in this file are not meant for general
// use, they are internal implementation details.  They may change at any time.
 
#if defined(BLOCXX_USE_PTHREAD)
 
   #include <pthread.h>
 
#ifdef BLOCXX_NCR //for the function pthread_cond_init
#define PTHREAD_COND_ATTR_DEFAULT  pthread_condattr_default
#else
#define PTHREAD_COND_ATTR_DEFAULT  0
#endif
 
   namespace BLOCXX_NAMESPACE
   {
 
      // Platform specific thread type
      typedef pthread_t       Thread_t;
      typedef pthread_mutex_t NativeMutex_t;
      struct NonRecursiveMutex_t
      {
         pthread_mutex_t mutex;
      };
 
      #if defined(BLOCXX_HAVE_PTHREAD_MUTEXATTR_SETTYPE)
      // Platform specific mutex type
      // we have native recursive mutexes.
      struct Mutex_t
      {
         pthread_mutex_t mutex;
      };
 
      #else
 
      // we have to emulate recursive mutexes.
      struct Mutex_t
      {
         pthread_mutex_t mutex;
         pthread_cond_t unlocked;
         bool valid_id;
         unsigned count;
         pthread_t thread_id;
      };
      #endif
 
      // Platform specific conditional variable type
      typedef pthread_cond_t        ConditionVar_t;
      struct NonRecursiveMutexLockState
      {
         pthread_t thread_id;
         NativeMutex_t* pmutex;
      };
 
   } // end namespace BLOCXX_NAMESPACE
 
#elif defined(BLOCXX_WIN32)
 
#define WIN32_LEAN_AND_MEAN  // Exclude rarely-used stuff from Windows headers
#include <wtypes.h>
 
   namespace BLOCXX_NAMESPACE
   {
      // Platform specific thread type
      typedef DWORD Thread_t;
      typedef HANDLE NativeMutex_t;
      typedef HANDLE NonRecursiveMutex_t;
      typedef LPCRITICAL_SECTION Mutex_t;
 
      // Platform specific conditional variable type
      typedef struct
      {
         // Number of waiting threads
         int waitersCount;
         // Serialize access to waitersCount
         CRITICAL_SECTION waitersCountLock;
         // Semaphore used to queue up threads waiting for the condition to
         // become signaled
         HANDLE queue;
         // An auto-reset event used during broadcasting to wait for all the 
         // threads to wake up and be released from the queue
         HANDLE waitersDone;
         // Keeps track of whether we are broadcasting or signaling. This allows
         // for optimization if just signaling.
         bool wasBroadcast;
      } ConditionInfo_t;
 
      typedef ConditionInfo_t* ConditionVar_t;
      //typedef void*         ConditionVar_t;
      struct NonRecursiveMutexLockState
      {
         DWORD thread_id;
         NativeMutex_t* pmutex;
      };
 
   } // end namespace BLOCXX_NAMESPACE
 
#endif
 
#endif   // #ifndef BLOCXX_THREAD_TYPES_HPP_