text: // ==========================================================================
  //                 SeqAn - The Library for Sequence Analysis
  // ==========================================================================
  // Copyright (c) 2006-2016, Knut Reinert, FU Berlin
  // All rights reserved.
  //
  // Redistribution and use in source and binary forms, with or without
  // modification, are permitted provided that the following conditions are met:
  //
  //     * Redistributions of source code must retain the above copyright
  //       notice, this list of conditions and the following disclaimer.
  //     * Redistributions in binary form must reproduce the above copyright
  //       notice, this list of conditions and the following disclaimer in the
  //       documentation and/or other materials provided with the distribution.
  //     * Neither the name of Knut Reinert or the FU Berlin nor the names of
  //       its contributors may be used to endorse or promote products derived
  //       from this software without specific prior written permission.
  //
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  // ARE DISCLAIMED. IN NO EVENT SHALL KNUT REINERT OR THE FU BERLIN BE LIABLE
  // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  // LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  // OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
  // DAMAGE.
  //
  // ==========================================================================
  // Author: David Weese <david.weese@fu-berlin.de>
  // ==========================================================================
  
  //SEQAN_NO_GENERATED_FORWARDS: no forwards are generated for this file
  
  #ifndef SEQAN_HEADER_SYSTEM_MUTEX_H
  #define SEQAN_HEADER_SYSTEM_MUTEX_H
  
  namespace seqan
  {
  
  #ifdef PLATFORM_WINDOWS
  
      static SECURITY_ATTRIBUTES MutexDefaultAttributes = {
          sizeof(SECURITY_ATTRIBUTES),
          NULL,
          true
      };
  
      struct Mutex
      {
          typedef HANDLE Handle;
  
          Handle hMutex;
  
          Mutex():
              hMutex(NULL) {}
  
          Mutex(BOOL initial) {
              SEQAN_DO_SYS2(open(initial), "Could not create Mutex");
          }
  
          // Move constructors
          Mutex(Mutex & other, Move) :
              hMutex(other.hMutex)
          {
              other.hMutex = NULL;
          }
  
          Mutex(Mutex && other) :
              hMutex(other.hMutex)
          {
              other.hMutex = NULL;
          }
  
          ~Mutex() {
              if (*this)
                  SEQAN_DO_SYS2(close(), "Could not destroy Mutex");
          }
  
          inline bool open(BOOL initial = false) {
              return (hMutex = CreateMutex(&MutexDefaultAttributes, initial, NULL)) != NULL;
          }
  
          inline bool close() {
              bool success = CloseHandle(hMutex);
              hMutex = NULL;
              return success;
          }
  
          inline bool lock(DWORD timeoutMilliSec = INFINITE) {
              return WaitForSingleObject(hMutex, timeoutMilliSec) != WAIT_TIMEOUT;
          }
  
          inline bool unlock() {
              return ReleaseMutex(hMutex) != 0;
          }
  
          inline operator bool() const {
              return hMutex != NULL;
          }
  
      private:
  
          Mutex(Mutex const &) :
              hMutex(NULL)
          {
              // we only support move construction (no copy-construction)
          }
      };
  
  #else
  
      struct Mutex
      {
          typedef pthread_mutex_t* Handle;
  
          pthread_mutex_t data, *hMutex;
  
          Mutex():
              hMutex(NULL)
          {}
  
          Mutex(bool initial)
          {
              SEQAN_DO_SYS(open(initial));
          }
  
          // Move constructors
          Mutex(Mutex & other, Move) :
              hMutex(other.hMutex)
          {
              other.hMutex = NULL;
          }
  
          Mutex(Mutex && other) :
              hMutex(other.hMutex)
          {
              other.hMutex = NULL;
          }
  
          ~Mutex() {
              if (*this)
                  SEQAN_DO_SYS(close());
          }
  
          inline bool open(bool initial = false)
          {
              if (!pthread_mutex_init(&data, NULL) && (hMutex = &data)) {
                  if (initial) return lock();
                  return true;
              } else
                  return false;
          }
  
          inline bool close() {
              bool success = (pthread_mutex_destroy(hMutex) == 0);
              hMutex = NULL;
              return success;
          }
  
          inline bool lock() {
              return !pthread_mutex_lock(hMutex);
          }
  
          inline bool unlock() {
              return !pthread_mutex_unlock(hMutex);
          }
  
          inline operator bool() const {
              return hMutex != NULL;
          }
  
      private:
  
          Mutex(Mutex const &) :
              hMutex(NULL)
          {
              // we only support move construction (no copy-construction)
          }
  
      };
  
  #endif
  
      template <>
      struct HasMoveConstructor<Mutex> : True {};
  
      //////////////////////////////////////////////////////////////////////////////
      // global mutex functions
  
      inline bool open(Mutex &m, bool initial) {
          return m.open(initial);
      }
  
      inline bool open(Mutex &m) {
          return open(m, false);
      }
  
      inline bool close(Mutex &m) {
          return m.close();
      }
  
      inline bool lock(Mutex &m) {
          return m.lock();
      }
  
      inline bool unlock(Mutex &m) {
          return m.unlock();
      }
  
  }
  
  #endif
  