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124 lines
4.1 KiB
C++
124 lines
4.1 KiB
C++
/*
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* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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// This file contains platform-specific typedefs and defines.
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// Much of it is derived from Chromium's build/build_config.h.
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#ifndef WEBRTC_TYPEDEFS_H_
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#define WEBRTC_TYPEDEFS_H_
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// Processor architecture detection. For more info on what's defined, see:
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// http://msdn.microsoft.com/en-us/library/b0084kay.aspx
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// http://www.agner.org/optimize/calling_conventions.pdf
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// or with gcc, run: "echo | gcc -E -dM -"
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#if defined(_M_X64) || defined(__x86_64__)
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#define WEBRTC_ARCH_X86_FAMILY
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#define WEBRTC_ARCH_X86_64
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#define WEBRTC_ARCH_64_BITS
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#define WEBRTC_ARCH_LITTLE_ENDIAN
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#elif defined(__aarch64__)
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#define WEBRTC_ARCH_64_BITS
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#define WEBRTC_ARCH_LITTLE_ENDIAN
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#elif defined(_M_IX86) || defined(__i386__)
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#define WEBRTC_ARCH_X86_FAMILY
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#define WEBRTC_ARCH_X86
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#define WEBRTC_ARCH_32_BITS
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#define WEBRTC_ARCH_LITTLE_ENDIAN
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#elif defined(__ARMEL__)
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// TODO(ajm): We'd prefer to control platform defines here, but this is
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// currently provided by the Android makefiles. Commented to avoid duplicate
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// definition warnings.
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//#define WEBRTC_ARCH_ARM
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// TODO(ajm): Chromium uses the following two defines. Should we switch?
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//#define WEBRTC_ARCH_ARM_FAMILY
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//#define WEBRTC_ARCH_ARMEL
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#define WEBRTC_ARCH_32_BITS
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#define WEBRTC_ARCH_LITTLE_ENDIAN
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#elif defined(__MIPSEL__)
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#define WEBRTC_ARCH_32_BITS
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#define WEBRTC_ARCH_LITTLE_ENDIAN
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#elif defined(__pnacl__)
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#define WEBRTC_ARCH_32_BITS
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#define WEBRTC_ARCH_LITTLE_ENDIAN
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#else
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#error Please add support for your architecture in typedefs.h
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#endif
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#if !(defined(WEBRTC_ARCH_LITTLE_ENDIAN) ^ defined(WEBRTC_ARCH_BIG_ENDIAN))
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#error Define either WEBRTC_ARCH_LITTLE_ENDIAN or WEBRTC_ARCH_BIG_ENDIAN
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#endif
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#if (defined(WEBRTC_ARCH_X86_FAMILY) && !defined(__SSE2__)) || \
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(defined(WEBRTC_ARCH_ARM_V7) && !defined(WEBRTC_ARCH_ARM_NEON))
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#define WEBRTC_CPU_DETECTION
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#endif
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#if !defined(_MSC_VER)
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#include <stdint.h>
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#else
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// Define C99 equivalent types, since pre-2010 MSVC doesn't provide stdint.h.
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typedef signed char int8_t;
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typedef signed short int16_t;
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typedef signed int int32_t;
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typedef __int64 int64_t;
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typedef unsigned char uint8_t;
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typedef unsigned short uint16_t;
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typedef unsigned int uint32_t;
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typedef unsigned __int64 uint64_t;
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#endif
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// Borrowed from Chromium's base/compiler_specific.h.
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// Annotate a virtual method indicating it must be overriding a virtual
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// method in the parent class.
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// Use like:
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// virtual void foo() OVERRIDE;
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#if defined(_MSC_VER)
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#define OVERRIDE override
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#elif defined(__clang__)
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// Clang defaults to C++03 and warns about using override. Squelch that.
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// Intentionally no push/pop here so all users of OVERRIDE ignore the warning
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// too. This is like passing -Wno-c++11-extensions, except that GCC won't die
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// (because it won't see this pragma).
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#pragma clang diagnostic ignored "-Wc++11-extensions"
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#define OVERRIDE override
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#elif defined(__GNUC__) && __cplusplus >= 201103 && \
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(__GNUC__ * 10000 + __GNUC_MINOR__ * 100) >= 40700
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// GCC 4.7 supports explicit virtual overrides when C++11 support is enabled.
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#define OVERRIDE override
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#else
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#define OVERRIDE
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#endif
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// Annotate a function indicating the caller must examine the return value.
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// Use like:
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// int foo() WARN_UNUSED_RESULT;
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// TODO(ajm): Hack to avoid multiple definitions until the base/ of webrtc and
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// libjingle are merged.
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#if !defined(WARN_UNUSED_RESULT)
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#if defined(__GNUC__)
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#define WARN_UNUSED_RESULT __attribute__((warn_unused_result))
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#else
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#define WARN_UNUSED_RESULT
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#endif
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#endif // WARN_UNUSED_RESULT
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// Put after a variable that might not be used, to prevent compiler warnings:
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// int result UNUSED = DoSomething();
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// assert(result == 17);
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#ifndef UNUSED
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#ifdef __GNUC__
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#define UNUSED __attribute__((unused))
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#else
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#define UNUSED
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#endif
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#endif
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#endif // WEBRTC_TYPEDEFS_H_
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