Adds a modified copy of talk/base to webrtc/base. It is the first step in migrating talk/base to webrtc/base.
BUG=N/A R=andrew@webrtc.org, wu@webrtc.org Review URL: https://webrtc-codereview.appspot.com/12199004 git-svn-id: http://webrtc.googlecode.com/svn/trunk@6107 4adac7df-926f-26a2-2b94-8c16560cd09d
This commit is contained in:
henrike@webrtc.org
201
webrtc/base/common.h
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201
webrtc/base/common.h
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/*
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* Copyright 2004 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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#ifndef WEBRTC_BASE_COMMON_H_ // NOLINT
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#define WEBRTC_BASE_COMMON_H_
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#include "webrtc/base/basictypes.h"
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#include "webrtc/base/constructormagic.h"
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#if defined(_MSC_VER)
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// warning C4355: 'this' : used in base member initializer list
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#pragma warning(disable:4355)
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#endif
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//////////////////////////////////////////////////////////////////////
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// General Utilities
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//////////////////////////////////////////////////////////////////////
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// Note: UNUSED is also defined in basictypes.h
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#ifndef UNUSED
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#define UNUSED(x) Unused(static_cast<const void*>(&x))
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#define UNUSED2(x, y) Unused(static_cast<const void*>(&x)); \
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Unused(static_cast<const void*>(&y))
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#define UNUSED3(x, y, z) Unused(static_cast<const void*>(&x)); \
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Unused(static_cast<const void*>(&y)); \
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Unused(static_cast<const void*>(&z))
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#define UNUSED4(x, y, z, a) Unused(static_cast<const void*>(&x)); \
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Unused(static_cast<const void*>(&y)); \
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Unused(static_cast<const void*>(&z)); \
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Unused(static_cast<const void*>(&a))
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#define UNUSED5(x, y, z, a, b) Unused(static_cast<const void*>(&x)); \
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Unused(static_cast<const void*>(&y)); \
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Unused(static_cast<const void*>(&z)); \
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Unused(static_cast<const void*>(&a)); \
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Unused(static_cast<const void*>(&b))
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inline void Unused(const void*) {}
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#endif // UNUSED
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#if !defined(WEBRTC_WIN)
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#ifndef strnicmp
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#define strnicmp(x, y, n) strncasecmp(x, y, n)
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#endif
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#ifndef stricmp
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#define stricmp(x, y) strcasecmp(x, y)
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#endif
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// TODO(fbarchard): Remove this. std::max should be used everywhere in the code.
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// NOMINMAX must be defined where we include <windows.h>.
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#define stdmax(x, y) std::max(x, y)
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#else
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#define stdmax(x, y) rtc::_max(x, y)
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#endif
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#define ARRAY_SIZE(x) (static_cast<int>(sizeof(x) / sizeof(x[0])))
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/////////////////////////////////////////////////////////////////////////////
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// Assertions
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/////////////////////////////////////////////////////////////////////////////
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#ifndef ENABLE_DEBUG
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#define ENABLE_DEBUG _DEBUG
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#endif // !defined(ENABLE_DEBUG)
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// Even for release builds, allow for the override of LogAssert. Though no
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// macro is provided, this can still be used for explicit runtime asserts
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// and allow applications to override the assert behavior.
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namespace rtc {
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// If a debugger is attached, triggers a debugger breakpoint. If a debugger is
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// not attached, forces program termination.
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void Break();
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// LogAssert writes information about an assertion to the log. It's called by
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// Assert (and from the ASSERT macro in debug mode) before any other action
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// is taken (e.g. breaking the debugger, abort()ing, etc.).
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void LogAssert(const char* function, const char* file, int line,
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const char* expression);
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typedef void (*AssertLogger)(const char* function,
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const char* file,
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int line,
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const char* expression);
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// Sets a custom assert logger to be used instead of the default LogAssert
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// behavior. To clear the custom assert logger, pass NULL for |logger| and the
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// default behavior will be restored. Only one custom assert logger can be set
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// at a time, so this should generally be set during application startup and
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// only by one component.
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void SetCustomAssertLogger(AssertLogger logger);
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} // namespace rtc
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#if ENABLE_DEBUG
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namespace rtc {
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inline bool Assert(bool result, const char* function, const char* file,
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int line, const char* expression) {
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if (!result) {
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LogAssert(function, file, line, expression);
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Break();
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return false;
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}
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return true;
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}
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} // namespace rtc
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#if defined(_MSC_VER) && _MSC_VER < 1300
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#define __FUNCTION__ ""
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#endif
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#ifndef ASSERT
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#define ASSERT(x) \
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(void)rtc::Assert((x), __FUNCTION__, __FILE__, __LINE__, #x)
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#endif
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#ifndef VERIFY
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#define VERIFY(x) rtc::Assert((x), __FUNCTION__, __FILE__, __LINE__, #x)
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#endif
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#else // !ENABLE_DEBUG
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namespace rtc {
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inline bool ImplicitCastToBool(bool result) { return result; }
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} // namespace rtc
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#ifndef ASSERT
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#define ASSERT(x) (void)0
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#endif
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#ifndef VERIFY
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#define VERIFY(x) rtc::ImplicitCastToBool(x)
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#endif
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#endif // !ENABLE_DEBUG
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#define COMPILE_TIME_ASSERT(expr) char CTA_UNIQUE_NAME[expr]
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#define CTA_UNIQUE_NAME CTA_MAKE_NAME(__LINE__)
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#define CTA_MAKE_NAME(line) CTA_MAKE_NAME2(line)
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#define CTA_MAKE_NAME2(line) constraint_ ## line
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// Forces compiler to inline, even against its better judgement. Use wisely.
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#if defined(__GNUC__)
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#define FORCE_INLINE __attribute__((always_inline))
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#elif defined(WEBRTC_WIN)
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#define FORCE_INLINE __forceinline
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#else
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#define FORCE_INLINE
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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(WEBRTC_WIN)
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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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// To explicitly ignore a result, see |ignore_result()| in <base/basictypes.h>.
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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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#endif // WEBRTC_BASE_COMMON_H_ // NOLINT
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