mirror of https://github.com/hslam/shm.git
32 lines
740 B
Go
32 lines
740 B
Go
// Copyright (c) 2020 Meng Huang (mhboy@outlook.com)
|
|
// This package is licensed under a MIT license that can be found in the LICENSE file.
|
|
|
|
// Package shm provides a way to use System V shared memory.
|
|
package shm
|
|
|
|
import (
|
|
"os"
|
|
"syscall"
|
|
)
|
|
|
|
const (
|
|
// O_RDONLY opens the file read-only.
|
|
O_RDONLY int = syscall.O_RDONLY
|
|
// O_WRONLY opens the file write-only.
|
|
O_WRONLY int = syscall.O_WRONLY
|
|
// O_RDWR opens the file read-write.
|
|
O_RDWR int = syscall.O_RDWR
|
|
|
|
// O_CREATE creates a new file if none exists.
|
|
O_CREATE int = syscall.O_CREAT
|
|
)
|
|
|
|
// validSize returns the valid size.
|
|
func validSize(size int64) int64 {
|
|
pageSize := int64(os.Getpagesize())
|
|
if size%pageSize == 0 {
|
|
return size
|
|
}
|
|
return (size/pageSize + 1) * pageSize
|
|
}
|