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111 lines
4.0 KiB
111 lines
4.0 KiB
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ART_LIBARTBASE_BASE_MACROS_H_
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#define ART_LIBARTBASE_BASE_MACROS_H_
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#include <stddef.h> // for size_t
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#include <unistd.h> // for TEMP_FAILURE_RETRY
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#include "android-base/macros.h"
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#include "android-base/thread_annotations.h"
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// Declare a friend relationship in a class with a test. Used rather that FRIEND_TEST to avoid
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// globally importing gtest/gtest.h into the main ART header files.
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#define ART_FRIEND_TEST(test_set_name, individual_test)\
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friend class test_set_name##_##individual_test##_Test
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// Declare a friend relationship in a class with a typed test.
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#define ART_FRIEND_TYPED_TEST(test_set_name, individual_test)\
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template<typename T> ART_FRIEND_TEST(test_set_name, individual_test)
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// A macro to disallow new and delete operators for a class. It goes in the private: declarations.
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// NOTE: Providing placement new (and matching delete) for constructing container elements.
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#define DISALLOW_ALLOCATION() \
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public: \
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NO_RETURN ALWAYS_INLINE void operator delete(void*, size_t) { UNREACHABLE(); } \
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ALWAYS_INLINE void* operator new(size_t, void* ptr) noexcept { return ptr; } \
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ALWAYS_INLINE void operator delete(void*, void*) noexcept { } \
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private: \
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void* operator new(size_t) = delete // NOLINT
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// offsetof is not defined by the spec on types with non-standard layout,
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// however it is implemented by compilers in practice.
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// (note that reinterpret_cast is not valid constexpr)
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//
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// Alternative approach would be something like:
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// #define OFFSETOF_HELPER(t, f) \
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// (reinterpret_cast<uintptr_t>(&reinterpret_cast<t*>(16)->f) - static_cast<uintptr_t>(16u))
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// #define OFFSETOF_MEMBER(t, f) \
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// (__builtin_constant_p(OFFSETOF_HELPER(t,f)) ? OFFSETOF_HELPER(t,f) : OFFSETOF_HELPER(t,f))
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#define OFFSETOF_MEMBER(t, f) offsetof(t, f)
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#define OFFSETOF_MEMBERPTR(t, f) \
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(reinterpret_cast<uintptr_t>(&(reinterpret_cast<t*>(16)->*f)) - static_cast<uintptr_t>(16)) // NOLINT
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#define ALIGNED(x) __attribute__ ((__aligned__(x)))
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#define PACKED(x) __attribute__ ((__aligned__(x), __packed__))
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// Stringify the argument.
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#define QUOTE(x) #x
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#define STRINGIFY(x) QUOTE(x)
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// Append tokens after evaluating.
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#define APPEND_TOKENS_AFTER_EVAL_2(a, b) a ## b
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#define APPEND_TOKENS_AFTER_EVAL(a, b) APPEND_TOKENS_AFTER_EVAL_2(a, b)
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#ifndef NDEBUG
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#define ALWAYS_INLINE
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#define FLATTEN
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#else
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#define ALWAYS_INLINE __attribute__ ((always_inline))
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#define FLATTEN __attribute__ ((flatten))
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#endif
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// clang doesn't like attributes on lambda functions. It would be nice to say:
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// #define ALWAYS_INLINE_LAMBDA ALWAYS_INLINE
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#define ALWAYS_INLINE_LAMBDA
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#define NO_INLINE __attribute__ ((noinline))
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#if defined (__APPLE__)
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#define HOT_ATTR
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#define COLD_ATTR
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#else
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#define HOT_ATTR __attribute__ ((hot))
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#define COLD_ATTR __attribute__ ((cold))
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#endif
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#define PURE __attribute__ ((__pure__))
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// Define that a position within code is unreachable, for example:
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// int foo () { LOG(FATAL) << "Don't call me"; UNREACHABLE(); }
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// without the UNREACHABLE a return statement would be necessary.
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#define UNREACHABLE __builtin_unreachable
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// Add the C++11 noreturn attribute.
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#define NO_RETURN [[ noreturn ]] // NOLINT[whitespace/braces] [5]
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// Annotalysis thread-safety analysis support. Things that are not in base.
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#define LOCKABLE CAPABILITY("mutex")
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#define SHARED_LOCKABLE SHARED_CAPABILITY("mutex")
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#define HIDDEN __attribute__((visibility("hidden")))
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#define EXPORT __attribute__((visibility("default")))
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#endif // ART_LIBARTBASE_BASE_MACROS_H_
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