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Issue 160191: Move base::va_copy from a function to a macro. (Closed)
Patch Set: Created 11 years, 5 months ago
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1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. 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 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef BASE_PORT_H_ 5 #ifndef BASE_PORT_H_
6 #define BASE_PORT_H_ 6 #define BASE_PORT_H_
7 7
8 #include <stdarg.h> 8 #include <stdarg.h>
9 #include "build/build_config.h" 9 #include "build/build_config.h"
10 10
(...skipping 14 matching lines...) Expand all
25 #define GG_INT8_C(x) (x) 25 #define GG_INT8_C(x) (x)
26 #define GG_INT16_C(x) (x) 26 #define GG_INT16_C(x) (x)
27 #define GG_INT32_C(x) (x) 27 #define GG_INT32_C(x) (x)
28 #define GG_INT64_C(x) GG_LONGLONG(x) 28 #define GG_INT64_C(x) GG_LONGLONG(x)
29 29
30 #define GG_UINT8_C(x) (x ## U) 30 #define GG_UINT8_C(x) (x ## U)
31 #define GG_UINT16_C(x) (x ## U) 31 #define GG_UINT16_C(x) (x ## U)
32 #define GG_UINT32_C(x) (x ## U) 32 #define GG_UINT32_C(x) (x ## U)
33 #define GG_UINT64_C(x) GG_ULONGLONG(x) 33 #define GG_UINT64_C(x) GG_ULONGLONG(x)
34 34
35 namespace base {
36
37 // It's possible for functions that use a va_list, such as StringPrintf, to 35 // 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 36 // 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 37 // 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 38 // 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 39 // implementation here. It is not guaranteed that assignment is a copy, so the
42 // StringUtil.VariableArgsFunc unit test tests this capability. 40 // StringUtil.VariableArgsFunc unit test tests this capability.
43 inline void va_copy(va_list& a, va_list& b) {
44 #if defined(COMPILER_GCC) 41 #if defined(COMPILER_GCC)
45 ::va_copy(a, b); 42 #define GG_VA_COPY(a, b) (::va_copy(a, b))
Mark Mentovai 2009/07/27 21:07:30 You don't need the :: any longer.
46 #elif defined(COMPILER_MSVC) 43 #elif defined(COMPILER_MSVC)
47 a = b; 44 #define GG_VA_COPY(a, b) (a = b)
48 #endif 45 #endif
49 }
50
51 } // namespace base
52 46
53 // Define an OS-neutral wrapper for shared library entry points 47 // Define an OS-neutral wrapper for shared library entry points
54 #if defined(OS_WIN) 48 #if defined(OS_WIN)
55 #define API_CALL __stdcall 49 #define API_CALL __stdcall
56 #elif defined(OS_LINUX) || defined(OS_MACOSX) 50 #elif defined(OS_LINUX) || defined(OS_MACOSX)
57 #define API_CALL 51 #define API_CALL
58 #endif 52 #endif
59 53
60 #endif // BASE_PORT_H_ 54 #endif // BASE_PORT_H_
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