base/port.h

   1 // Copyright (c) 2006-2008 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 #ifndef BASE_PORT_H_
   6 #define BASE_PORT_H_
   7
   8 #include <stdarg.h>
   9 #include "build/build_config.h"
  10
  11 #ifdef COMPILER_MSVC
  12 #define GG_LONGLONG(x) x##I64
  13 #define GG_ULONGLONG(x) x##UI64
  14 #else
  15 #define GG_LONGLONG(x) x##LL
  16 #define GG_ULONGLONG(x) x##ULL
  17 #endif
  18
  19 // DEPRECATED: In Chromium, we force-define __STDC_CONSTANT_MACROS, so you can
  20 // just use the regular (U)INTn_C macros from <stdint.h>.
  21 // TODO(viettrungluu): Remove the remaining GG_(U)INTn_C macros.
  22 #define GG_INT64_C(x)   GG_LONGLONG(x)
  23 #define GG_UINT64_C(x)  GG_ULONGLONG(x)
  24
  25 // It's possible for functions that use a va_list, such as StringPrintf, to
  26 // invalidate the data in it upon use.  The fix is to make a copy of the
  27 // structure before using it and use that copy instead.  va_copy is provided
  28 // for this purpose.  MSVC does not provide va_copy, so define an
  29 // implementation here.  It is not guaranteed that assignment is a copy, so the
  30 // StringUtil.VariableArgsFunc unit test tests this capability.
  31 #if defined(COMPILER_GCC)
  32 #define GG_VA_COPY(a, b) (va_copy(a, b))
  33 #elif defined(COMPILER_MSVC)
  34 #define GG_VA_COPY(a, b) (a = b)
  35 #endif
  36
  37 // Define an OS-neutral wrapper for shared library entry points
  38 #if defined(OS_WIN)
  39 #define API_CALL __stdcall
  40 #else
  41 #define API_CALL
  42 #endif
  43
  44 #endif  // BASE_PORT_H_