5e62b34c0d
Use <android-base/macros.h> instead where possible, and move the bionic macros out of the way of the libbase ones. Yes, there are folks who manage to end up with both included at once (thanks OpenGL!), and cleaning that up doesn't seem nearly as practical as just making this change. Bug: N/A Test: builds Change-Id: I23fc544f39d5addf81dc61471771a5438778895b
89 lines
3.2 KiB
C++
89 lines
3.2 KiB
C++
/*
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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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#pragma once
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#include <stdint.h>
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#define BIONIC_DISALLOW_COPY_AND_ASSIGN(TypeName) \
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TypeName(const TypeName&) = delete; \
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void operator=(const TypeName&) = delete
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#define BIONIC_DISALLOW_IMPLICIT_CONSTRUCTORS(TypeName) \
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TypeName() = delete; \
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BIONIC_DISALLOW_COPY_AND_ASSIGN(TypeName)
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#define BIONIC_ROUND_UP_POWER_OF_2(value) \
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((sizeof(value) == 8) \
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? (1UL << (64 - __builtin_clzl(static_cast<unsigned long>(value)))) \
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: (1UL << (32 - __builtin_clz(static_cast<unsigned int>(value)))))
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static constexpr uintptr_t align_down(uintptr_t p, size_t align) {
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return p & ~(align - 1);
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}
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static constexpr uintptr_t align_up(uintptr_t p, size_t align) {
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return (p + align - 1) & ~(align - 1);
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}
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template <typename T>
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static inline T* align_down(T* p, size_t align) {
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return reinterpret_cast<T*>(align_down(reinterpret_cast<uintptr_t>(p), align));
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}
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template <typename T>
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static inline T* align_up(T* p, size_t align) {
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return reinterpret_cast<T*>(align_up(reinterpret_cast<uintptr_t>(p), align));
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}
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#if defined(__arm__)
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// Do not emit anything for arm, clang does not allow emiting an arm unwind
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// directive.
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// #define BIONIC_STOP_UNWIND asm volatile(".cantunwind")
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#define BIONIC_STOP_UNWIND
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#elif defined(__aarch64__)
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#define BIONIC_STOP_UNWIND asm volatile(".cfi_undefined x30")
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#elif defined(__i386__)
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#define BIONIC_STOP_UNWIND asm volatile(".cfi_undefined \%eip")
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#elif defined(__x86_64__)
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#define BIONIC_STOP_UNWIND asm volatile(".cfi_undefined \%rip")
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#elif defined (__mips__)
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#define BIONIC_STOP_UNWIND asm volatile(".cfi_undefined $ra")
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#endif
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// The arraysize(arr) macro returns the # of elements in an array arr.
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// The expression is a compile-time constant, and therefore can be
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// used in defining new arrays, for example. If you use arraysize on
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// a pointer by mistake, you will get a compile-time error.
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//
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// One caveat is that arraysize() doesn't accept any array of an
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// anonymous type or a type defined inside a function.
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//
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// This template function declaration is used in defining arraysize.
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// Note that the function doesn't need an implementation, as we only
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// use its type.
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template <typename T, size_t N>
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char (&ArraySizeHelper(T (&array)[N]))[N]; // NOLINT(readability/casting)
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#define arraysize(array) (sizeof(ArraySizeHelper(array)))
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// Used to inform clang's -Wimplicit-fallthrough that a fallthrough is intended. There's no way to
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// silence (or enable, apparently) -Wimplicit-fallthrough in C yet.
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#ifdef __cplusplus
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#define __BIONIC_FALLTHROUGH [[clang::fallthrough]]
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#else
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#define __BIONIC_FALLTHROUGH
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#endif
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