/* * Copyright 2019 Dgraph Labs, Inc. and Contributors * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package y import ( "os" ) // Mmap uses the mmap system call to memory-map a file. If writable is true, // memory protection of the pages is set so that they may be written to as well. func Mmap(fd *os.File, writable bool, size int64) ([]byte, error) { return mmap(fd, writable, size) } // Munmap unmaps a previously mapped slice. func Munmap(b []byte) error { return munmap(b) } // Madvise uses the madvise system call to give advise about the use of memory // when using a slice that is memory-mapped to a file. Set the readahead flag to // false if page references are expected in random order. func Madvise(b []byte, readahead bool) error { return madvise(b, readahead) }