source/libs/poppler/poppler-src/goo/GooMutex.h

   1 //========================================================================
   2 //
   3 // GooMutex.h
   4 //
   5 // Portable mutex macros.
   6 //
   7 // Copyright 2002-2003 Glyph & Cog, LLC
   8 //
   9 //========================================================================
  10
  11 //========================================================================
  12 //
  13 // Modified under the Poppler project - http://poppler.freedesktop.org
  14 //
  15 // All changes made under the Poppler project to this file are licensed
  16 // under GPL version 2 or later
  17 //
  18 // Copyright (C) 2009 Kovid Goyal <kovid@kovidgoyal.net>
  19 // Copyright (C) 2013 Thomas Freitag <Thomas.Freitag@alfa.de>
  20 // Copyright (C) 2013 Albert Astals Cid <aacid@kde.org>
  21 // Copyright (C) 2013 Adam Reichold <adamreichold@myopera.com>
  22 // Copyright (C) 2014 Bogdan Cristea <cristeab@gmail.com>
  23 // Copyright (C) 2014 Peter Breitenlohner <peb@mppmu.mpg.de>
  24 //
  25 // To see a description of the changes please see the Changelog file that
  26 // came with your tarball or type make ChangeLog if you are building from git
  27 //
  28 //========================================================================
  29
  30 #ifndef GMUTEX_H
  31 #define GMUTEX_H
  32
  33 // Usage:
  34 //
  35 // GooMutex m;
  36 // gInitMutex(&m);
  37 // ...
  38 // gLockMutex(&m);
  39 //   ... critical section ...
  40 // gUnlockMutex(&m);
  41 // ...
  42 // gDestroyMutex(&m);
  43
  44 #ifdef _WIN32
  45 #ifndef NOMINMAX
  46 #define NOMINMAX
  47 #endif
  48 #include <windows.h>
  49
  50 typedef CRITICAL_SECTION GooMutex;
  51
  52 #define gInitMutex(m) InitializeCriticalSection(m)
  53 #define gDestroyMutex(m) DeleteCriticalSection(m)
  54 #define gLockMutex(m) EnterCriticalSection(m)
  55 #define gUnlockMutex(m) LeaveCriticalSection(m)
  56
  57 #else // assume pthreads
  58
  59 #include <pthread.h>
  60
  61 typedef pthread_mutex_t GooMutex;
  62
  63 inline void gInitMutex(GooMutex *m) {
  64   pthread_mutexattr_t mutexattr;
  65   pthread_mutexattr_init(&mutexattr);
  66   pthread_mutexattr_settype(&mutexattr, PTHREAD_MUTEX_RECURSIVE);
  67   pthread_mutex_init(m, &mutexattr);
  68   pthread_mutexattr_destroy(&mutexattr);
  69 }
  70 #define gDestroyMutex(m) pthread_mutex_destroy(m)
  71 #define gLockMutex(m) pthread_mutex_lock(m)
  72 #define gUnlockMutex(m) pthread_mutex_unlock(m)
  73
  74 #endif
  75
  76 class MutexLocker {
  77 public:
  78   MutexLocker(GooMutex *mutexA) : mutex(mutexA) { gLockMutex(mutex); }
  79   ~MutexLocker() { gUnlockMutex(mutex); }
  80
  81 private:
  82   GooMutex *mutex;
  83 };
  84
  85 #endif