OLD | NEW |
1 /* | 1 /* |
2 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license | 4 * Use of this source code is governed by a BSD-style license |
5 * that can be found in the LICENSE file in the root of the source | 5 * that can be found in the LICENSE file in the root of the source |
6 * tree. An additional intellectual property rights grant can be found | 6 * tree. An additional intellectual property rights grant can be found |
7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
9 */ | 9 */ |
10 | 10 |
| 11 // This file contains platform-specific typedefs and defines. |
| 12 // Much of it is derived from Chromium's build/build_config.h. |
| 13 |
11 #ifndef WEBRTC_TYPEDEFS_H_ | 14 #ifndef WEBRTC_TYPEDEFS_H_ |
12 #define WEBRTC_TYPEDEFS_H_ | 15 #define WEBRTC_TYPEDEFS_H_ |
13 | 16 |
14 // TODO(solenberg): Delete this file once downstream projects have been updated. | 17 // Processor architecture detection. For more info on what's defined, see: |
| 18 // http://msdn.microsoft.com/en-us/library/b0084kay.aspx |
| 19 // http://www.agner.org/optimize/calling_conventions.pdf |
| 20 // or with gcc, run: "echo | gcc -E -dM -" |
| 21 #if defined(_M_X64) || defined(__x86_64__) |
| 22 #define WEBRTC_ARCH_X86_FAMILY |
| 23 #define WEBRTC_ARCH_X86_64 |
| 24 #define WEBRTC_ARCH_64_BITS |
| 25 #define WEBRTC_ARCH_LITTLE_ENDIAN |
| 26 #elif defined(__aarch64__) |
| 27 #define WEBRTC_ARCH_ARM_FAMILY |
| 28 #define WEBRTC_ARCH_64_BITS |
| 29 #define WEBRTC_ARCH_LITTLE_ENDIAN |
| 30 #elif defined(_M_IX86) || defined(__i386__) |
| 31 #define WEBRTC_ARCH_X86_FAMILY |
| 32 #define WEBRTC_ARCH_X86 |
| 33 #define WEBRTC_ARCH_32_BITS |
| 34 #define WEBRTC_ARCH_LITTLE_ENDIAN |
| 35 #elif defined(__ARMEL__) |
| 36 #define WEBRTC_ARCH_ARM_FAMILY |
| 37 #define WEBRTC_ARCH_32_BITS |
| 38 #define WEBRTC_ARCH_LITTLE_ENDIAN |
| 39 #elif defined(__MIPSEL__) |
| 40 #define WEBRTC_ARCH_MIPS_FAMILY |
| 41 #if defined(__LP64__) |
| 42 #define WEBRTC_ARCH_64_BITS |
| 43 #else |
| 44 #define WEBRTC_ARCH_32_BITS |
| 45 #endif |
| 46 #define WEBRTC_ARCH_LITTLE_ENDIAN |
| 47 #elif defined(__pnacl__) |
| 48 #define WEBRTC_ARCH_32_BITS |
| 49 #define WEBRTC_ARCH_LITTLE_ENDIAN |
| 50 #else |
| 51 #error Please add support for your architecture in typedefs.h |
| 52 #endif |
| 53 |
| 54 #if !(defined(WEBRTC_ARCH_LITTLE_ENDIAN) ^ defined(WEBRTC_ARCH_BIG_ENDIAN)) |
| 55 #error Define either WEBRTC_ARCH_LITTLE_ENDIAN or WEBRTC_ARCH_BIG_ENDIAN |
| 56 #endif |
| 57 |
| 58 // TODO(zhongwei.yao): WEBRTC_CPU_DETECTION is only used in one place; we should |
| 59 // probably just remove it. |
| 60 #if (defined(WEBRTC_ARCH_X86_FAMILY) && !defined(__SSE2__)) |
| 61 #define WEBRTC_CPU_DETECTION |
| 62 #endif |
15 | 63 |
16 #include <stdint.h> | 64 #include <stdint.h> |
17 | 65 |
18 #include "webrtc/rtc_base/arch.h" | 66 // Annotate a function indicating the caller must examine the return value. |
19 #include "webrtc/rtc_base/annotations.h" | 67 // Use like: |
| 68 // int foo() RTC_WARN_UNUSED_RESULT; |
| 69 // To explicitly ignore a result, cast to void. |
| 70 // TODO(kwiberg): Remove when we can use [[nodiscard]] from C++17. |
| 71 #if defined(__clang__) |
| 72 #define RTC_WARN_UNUSED_RESULT __attribute__((__warn_unused_result__)) |
| 73 #elif defined(__GNUC__) |
| 74 // gcc has a __warn_unused_result__ attribute, but you can't quiet it by |
| 75 // casting to void, so we don't use it. |
| 76 #define RTC_WARN_UNUSED_RESULT |
| 77 #else |
| 78 #define RTC_WARN_UNUSED_RESULT |
| 79 #endif |
| 80 |
| 81 // Put after a variable that might not be used, to prevent compiler warnings: |
| 82 // int result ATTRIBUTE_UNUSED = DoSomething(); |
| 83 // assert(result == 17); |
| 84 // Deprecated since it only works with GCC & clang. See RTC_UNUSED below. |
| 85 // TODO(terelius): Remove. |
| 86 #ifndef ATTRIBUTE_UNUSED |
| 87 #if defined(__GNUC__) || defined(__clang__) |
| 88 #define ATTRIBUTE_UNUSED __attribute__ ((__unused__)) |
| 89 #else |
| 90 #define ATTRIBUTE_UNUSED |
| 91 #endif |
| 92 #endif |
| 93 |
| 94 // Macro to be used for switch-case fallthrough (required for enabling |
| 95 // -Wimplicit-fallthrough warning on Clang). |
| 96 #ifndef FALLTHROUGH |
| 97 #if defined(__clang__) |
| 98 #define FALLTHROUGH() [[clang::fallthrough]] |
| 99 #else |
| 100 #define FALLTHROUGH() do { } while (0) |
| 101 #endif |
| 102 #endif |
| 103 |
| 104 #ifndef NO_RETURN |
| 105 // Annotate a function that will not return control flow to the caller. |
| 106 #if defined(_MSC_VER) |
| 107 #define NO_RETURN __declspec(noreturn) |
| 108 #elif defined(__GNUC__) |
| 109 #define NO_RETURN __attribute__ ((__noreturn__)) |
| 110 #else |
| 111 #define NO_RETURN |
| 112 #endif |
| 113 #endif |
| 114 |
| 115 // Prevent the compiler from warning about an unused variable. For example: |
| 116 // int result = DoSomething(); |
| 117 // assert(result == 17); |
| 118 // RTC_UNUSED(result); |
| 119 // Note: In most cases it is better to remove the unused variable rather than |
| 120 // suppressing the compiler warning. |
| 121 #ifndef RTC_UNUSED |
| 122 #define RTC_UNUSED(x) static_cast<void>(x) |
| 123 #endif // RTC_UNUSED |
20 | 124 |
21 #endif // WEBRTC_TYPEDEFS_H_ | 125 #endif // WEBRTC_TYPEDEFS_H_ |
OLD | NEW |