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comparison: ipc/chromium/src/base/port.h
ipc/chromium/src/base/port.h
- changeset 0
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| 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 // Per C99 7.8.14, define __STDC_CONSTANT_MACROS before including <stdint.h> | |
| 20 // to get the INTn_C and UINTn_C macros for integer constants. It's difficult | |
| 21 // to guarantee any specific ordering of header includes, so it's difficult to | |
| 22 // guarantee that the INTn_C macros can be defined by including <stdint.h> at | |
| 23 // any specific point. Provide GG_INTn_C macros instead. | |
| 24 | |
| 25 #define GG_INT8_C(x) (x) | |
| 26 #define GG_INT16_C(x) (x) | |
| 27 #define GG_INT32_C(x) (x) | |
| 28 #define GG_INT64_C(x) GG_LONGLONG(x) | |
| 29 | |
| 30 #define GG_UINT8_C(x) (x ## U) | |
| 31 #define GG_UINT16_C(x) (x ## U) | |
| 32 #define GG_UINT32_C(x) (x ## U) | |
| 33 #define GG_UINT64_C(x) GG_ULONGLONG(x) | |
| 34 | |
| 35 namespace base { | |
| 36 | |
| 37 // It's possible for functions that use a va_list, such as StringPrintf, to | |
| 38 // invalidate the data in it upon use. The fix is to make a copy of the | |
| 39 // structure before using it and use that copy instead. va_copy is provided | |
| 40 // for this purpose. MSVC does not provide va_copy, so define an | |
| 41 // implementation here. It is not guaranteed that assignment is a copy, so the | |
| 42 // StringUtil.VariableArgsFunc unit test tests this capability. | |
| 43 | |
| 44 // The C standard says that va_copy is a "macro", not a function. Trying to | |
| 45 // use va_list as ref args to a function, as above, breaks some machines. | |
| 46 # if defined(COMPILER_GCC) | |
| 47 # define base_va_copy(_a, _b) ::va_copy(_a, _b) | |
| 48 # elif defined(COMPILER_MSVC) | |
| 49 # define base_va_copy(_a, _b) (_a = _b) | |
| 50 # else | |
| 51 # error No va_copy for your compiler | |
| 52 # endif | |
| 53 | |
| 54 } // namespace base | |
| 55 | |
| 56 // Define an OS-neutral wrapper for shared library entry points | |
| 57 #if defined(OS_WIN) | |
| 58 #define API_CALL __stdcall | |
| 59 #elif defined(OS_LINUX) || defined(OS_MACOSX) | |
| 60 #define API_CALL | |
| 61 #endif | |
| 62 | |
| 63 #endif // BASE_PORT_H_ |
