c4fb4e38de
Corresponds to upstream commit 524e9b043e7e86fd72353b987c9d5f6a1ebf83e1 Update notes: * Moved src/ to webrtc/ to easily diff against the third_party/webrtc in the chromium tree * ARM/NEON/MIPS support is not yet hooked up * Tests have not been copied
112 lines
3.6 KiB
C
112 lines
3.6 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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// TODO(zhongwei.yao): WEBRTC_CPU_DETECTION is only used in one place; we should
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// probably just remove it.
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#if (defined(WEBRTC_ARCH_X86_FAMILY) && !defined(__SSE2__)) || \
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defined(WEBRTC_DETECT_NEON)
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#define WEBRTC_CPU_DETECTION
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#endif
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// TODO(pbos): Use webrtc/base/basictypes.h instead to include fixed-size ints.
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#include <stdint.h>
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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 ATTRIBUTE_UNUSED = DoSomething();
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// assert(result == 17);
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#ifndef ATTRIBUTE_UNUSED
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#if defined(__GNUC__) || defined(__clang__)
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#define ATTRIBUTE_UNUSED __attribute__((unused))
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#else
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#define ATTRIBUTE_UNUSED
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#endif
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#endif
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// Macro to be used for switch-case fallthrough (required for enabling
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// -Wimplicit-fallthrough warning on Clang).
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#ifndef FALLTHROUGH
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#if defined(__clang__)
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#define FALLTHROUGH() [[clang::fallthrough]]
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#else
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#define FALLTHROUGH() do { } while (0)
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#endif
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#endif
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// Annotate a function that will not return control flow to the caller.
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#if defined(_MSC_VER)
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#define NO_RETURN __declspec(noreturn)
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#elif defined(__GNUC__)
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#define NO_RETURN __attribute__((noreturn))
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#else
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#define NO_RETURN
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#endif
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#endif // WEBRTC_TYPEDEFS_H_
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