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42 lines
1.3 KiB
C++
42 lines
1.3 KiB
C++
// Copyright 2017 The Dawn Authors
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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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#ifndef COMMON_MATH_H_
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#define COMMON_MATH_H_
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#include <cstddef>
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#include <cstdint>
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// The following are not valid for 0
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uint32_t ScanForward(uint32_t bits);
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uint32_t Log2(uint32_t value);
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bool IsPowerOfTwo(size_t n);
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bool IsPtrAligned(const void* ptr, size_t alignment);
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void* AlignVoidPtr(void* ptr, size_t alignment);
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bool IsAligned(uint32_t value, size_t alignment);
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uint32_t Align(uint32_t value, size_t alignment);
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template <typename T>
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T* AlignPtr(T* ptr, size_t alignment) {
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return reinterpret_cast<T*>(AlignVoidPtr(ptr, alignment));
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}
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template <typename T>
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const T* AlignPtr(const T* ptr, size_t alignment) {
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return reinterpret_cast<const T*>(AlignVoidPtr(const_cast<T*>(ptr), alignment));
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}
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#endif // COMMON_MATH_H_
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