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 #include "hphp/util/wide-tv-val-def.h"
  20
  21 namespace HPHP {
  22
  23 //////////////////////////////////////////////////////////////////////
  24
  25 /*
  26  * This header converts some common preprocessor symbols into
  27  * compile-time constant booleans.
  28  *
  29  * This allows writing code that is checked for being able to compile
  30  * regardless of whether the preprocessor flag is on.  (Then we rely
  31  * on DCE to remove the cases that can't happen.)
  32  */
  33
  34 //////////////////////////////////////////////////////////////////////
  35
  36 constexpr bool debug =
  37 #ifndef NDEBUG
  38   true
  39 #else
  40   false
  41 #endif
  42   ;
  43
  44 constexpr bool hhvm_reuse_tc =
  45 #ifdef HHVM_REUSE_TC
  46   true
  47 #else
  48   false
  49 #endif
  50   ;
  51
  52 constexpr bool use_tsan =
  53 #ifdef FOLLY_SANITIZE_THREAD
  54   true
  55 #else
  56   false
  57 #endif
  58   ;
  59
  60 constexpr bool one_bit_refcount =
  61 #ifdef ONE_BIT_REFCOUNT
  62   true
  63 #else
  64   false
  65 #endif
  66   ;
  67
  68 constexpr bool wide_tv_val =
  69 #ifdef HHVM_WIDE_TV_VAL
  70   true
  71 #else
  72   false
  73 #endif
  74   ;
  75
  76 constexpr bool facebook =
  77 #ifdef FACEBOOK
  78   true
  79 #else
  80   false
  81 #endif
  82   ;
  83
  84 //////////////////////////////////////////////////////////////////////
  85
  86 }
  87
  88 #endif