media/base/simd/media_export.asm

   1 ; Copyright 2013 The Chromium Authors. All rights reserved.
   2 ; Use of this source code is governed by a BSD-style license that can be
   3 ; found in the LICENSE file.
   4 ;
   5 ; A set of helper macros for controlling symbol visibility.
   6 ;
   7
   8 %ifndef MEDIA_BASE_SIMD_MEDIA_EXPORT_ASM_
   9 %define MEDIA_BASE_SIMD_MEDIA_EXPORT_ASM_
  10
  11 ; Necessary for the mangle() macro.
  12 %include "third_party/x86inc/x86inc.asm"
  13
  14 ;
  15 ; PRIVATE
  16 ; A flag representing the specified symbol is a private symbol. This define adds
  17 ; a hidden flag on Linux and a private_extern flag on Mac. (We can use this
  18 ; private_extern flag only on the latest yasm.)
  19 ;
  20 %ifdef MACHO
  21 %define PRIVATE :private_extern
  22 %elifdef ELF
  23 %define PRIVATE :hidden
  24 %else
  25 %define PRIVATE
  26 %endif
  27
  28 ;
  29 ; EXPORT %1
  30 ; Designates a symbol as PRIVATE if EXPORT_SYMBOLS is not set.
  31 ;
  32 %macro EXPORT 1
  33 %ifdef EXPORT_SYMBOLS
  34 global mangle(%1)
  35
  36 ; Windows needs an additional export declaration.
  37 %ifidn __OUTPUT_FORMAT__,win32
  38 export mangle(%1)
  39 %elifidn __OUTPUT_FORMAT__,win64
  40 export mangle(%1)
  41 %endif
  42
  43 %else
  44 global mangle(%1) PRIVATE
  45 %endif
  46 %endmacro
  47
  48 %endif  ; MEDIA_BASE_SIMD_MEDIA_EXPORT_ASM_