prolet/vendor/github.com/dgraph-io/ristretto/v2/z/mmap_plan9.go

/*
 * SPDX-FileCopyrightText: © Hypermode Inc. <hello@hypermode.com>
 * SPDX-License-Identifier: Apache-2.0
 */

package z

import (
	"os"
	"syscall"
)

// 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 nil, syscall.EPLAN9
}

// Munmap unmaps a previously mapped slice.
func munmap(b []byte) error {
	return syscall.EPLAN9
}

// 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 syscall.EPLAN9
}

func msync(b []byte) error {
	return syscall.EPLAN9
}