1 /* 2 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. 3 * 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 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 // This file contains platform-specific typedefs and defines. 12 // Much of it is derived from Chromium's build/build_config.h. 13 14 #ifndef WEBRTC_TYPEDEFS_H_ 15 #define WEBRTC_TYPEDEFS_H_ 16 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 #if defined(__LP64__) 41 #define WEBRTC_ARCH_MIPS64_FAMILY 42 #else 43 #define WEBRTC_ARCH_MIPS_FAMILY 44 #endif 45 #define WEBRTC_ARCH_32_BITS 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 defined(WEBRTC_DETECT_NEON) 62 #define WEBRTC_CPU_DETECTION 63 #endif 64 65 // TODO(pbos): Use webrtc/base/basictypes.h instead to include fixed-size ints. 66 #include <stdint.h> 67 68 // Annotate a function indicating the caller must examine the return value. 69 // Use like: 70 // int foo() WARN_UNUSED_RESULT; 71 // To explicitly ignore a result, see |ignore_result()| in <base/macros.h>. 72 // TODO(ajm): Hack to avoid multiple definitions until the base/ of webrtc and 73 // libjingle are merged. 74 #if !defined(WARN_UNUSED_RESULT) 75 #if defined(__GNUC__) || defined(__clang__) 76 #define WARN_UNUSED_RESULT __attribute__ ((__warn_unused_result__)) 77 #else 78 #define WARN_UNUSED_RESULT 79 #endif 80 #endif // WARN_UNUSED_RESULT 81 82 // Put after a variable that might not be used, to prevent compiler warnings: 83 // int result ATTRIBUTE_UNUSED = DoSomething(); 84 // assert(result == 17); 85 #ifndef ATTRIBUTE_UNUSED 86 #if defined(__GNUC__) || defined(__clang__) 87 #define ATTRIBUTE_UNUSED __attribute__ ((__unused__)) 88 #else 89 #define ATTRIBUTE_UNUSED 90 #endif 91 #endif 92 93 // Macro to be used for switch-case fallthrough (required for enabling 94 // -Wimplicit-fallthrough warning on Clang). 95 #ifndef FALLTHROUGH 96 #if defined(__clang__) 97 #define FALLTHROUGH() [[clang::fallthrough]] 98 #else 99 #define FALLTHROUGH() do { } while (0) 100 #endif 101 #endif 102 103 // Annotate a function that will not return control flow to the caller. 104 #if defined(_MSC_VER) 105 #define NO_RETURN __declspec(noreturn) 106 #elif defined(__GNUC__) 107 #define NO_RETURN __attribute__ ((__noreturn__)) 108 #else 109 #define NO_RETURN 110 #endif 111 112 #endif // WEBRTC_TYPEDEFS_H_ 113
