40 lines
1.3 KiB
Go
40 lines
1.3 KiB
Go
/*
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* Copyright 2019 Dgraph Labs, Inc. and Contributors
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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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package y
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import (
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"os"
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)
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// Mmap uses the mmap system call to memory-map a file. If writable is true,
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// memory protection of the pages is set so that they may be written to as well.
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func Mmap(fd *os.File, writable bool, size int64) ([]byte, error) {
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return mmap(fd, writable, size)
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}
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// Munmap unmaps a previously mapped slice.
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func Munmap(b []byte) error {
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return munmap(b)
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}
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// Madvise uses the madvise system call to give advise about the use of memory
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// when using a slice that is memory-mapped to a file. Set the readahead flag to
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// false if page references are expected in random order.
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func Madvise(b []byte, readahead bool) error {
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return madvise(b, readahead)
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}
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