hphp/util/compilation-flags.h

   1 /*
   2    +----------------------------------------------------------------------+
   3    | HipHop for PHP                                                       |
   4    +----------------------------------------------------------------------+
   5    | Copyright (c) 2010-present Facebook, Inc. (http://www.facebook.com)  |
   6    +----------------------------------------------------------------------+
   7    | This source file is subject to version 3.01 of the PHP license,      |
   8    | that is bundled with this package in the file LICENSE, and is        |
   9    | available through the world-wide-web at the following url:           |
  10    | http://www.php.net/license/3_01.txt                                  |
  11    | If you did not receive a copy of the PHP license and are unable to   |
  12    | obtain it through the world-wide-web, please send a note to          |
  13    | license@php.net so we can mail you a copy immediately.               |
  14    +----------------------------------------------------------------------+
  15 */
  16 #ifndef incl_HPHP_COMPILATION_FLAGS_H_
  17 #define incl_HPHP_COMPILATION_FLAGS_H_
  18
  19 namespace HPHP {
  20
  21 //////////////////////////////////////////////////////////////////////
  22
  23 /*
  24  * This header converts some common preprocessor symbols into
  25  * compile-time constant booleans.
  26  *
  27  * This allows writing code that is checked for being able to compile
  28  * regardless of whether the preprocessor flag is on.  (Then we rely
  29  * on DCE to remove the cases that can't happen.)
  30  */
  31
  32 //////////////////////////////////////////////////////////////////////
  33
  34 constexpr bool debug =
  35 #ifndef NDEBUG
  36   true
  37 #else
  38   false
  39 #endif
  40   ;
  41
  42 constexpr bool hhvm_reuse_tc =
  43 #ifdef HHVM_REUSE_TC
  44   true
  45 #else
  46   false
  47 #endif
  48   ;
  49
  50 constexpr bool use_tsan =
  51 #ifdef FOLLY_SANITIZE_THREAD
  52   true
  53 #else
  54   false
  55 #endif
  56   ;
  57
  58 constexpr bool one_bit_refcount =
  59 #ifdef ONE_BIT_REFCOUNT
  60   true
  61 #else
  62   false
  63 #endif
  64   ;
  65
  66 constexpr bool wide_tv_val =
  67 #ifdef HHVM_WIDE_TV_VAL
  68   true
  69 #else
  70   false
  71 #endif
  72   ;
  73
  74 constexpr bool facebook =
  75 #ifdef FACEBOOK
  76   true
  77 #else
  78   false
  79 #endif
  80   ;
  81
  82 //////////////////////////////////////////////////////////////////////
  83
  84 }
  85
  86 #endif