/*
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* Copyright (C) 2015 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 _BIONIC_PAGE_H_
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#define _BIONIC_PAGE_H_
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// Get PAGE_SIZE and PAGE_MASK.
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#include <sys/user.h>
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// Returns the address of the page containing address 'x'.
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#define PAGE_START(x) ((x) & PAGE_MASK)
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// Returns the offset of address 'x' in its page.
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#define PAGE_OFFSET(x) ((x) & ~PAGE_MASK)
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// Returns the address of the next page after address 'x', unless 'x' is
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// itself at the start of a page.
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#define PAGE_END(x) PAGE_START((x) + (PAGE_SIZE-1))
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#endif // _BIONIC_PAGE_H_
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