mirror of https://github.com/hslam/shm.git
49 lines
1.1 KiB
Go
49 lines
1.1 KiB
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.
|
|
|
|
// +build freebsd
|
|
|
|
package shm
|
|
|
|
import (
|
|
"syscall"
|
|
"unsafe"
|
|
)
|
|
|
|
const (
|
|
// SYS_SHMGET is syscall SYS_SHMGET constant
|
|
SYS_SHMGET = 231
|
|
// SYS_SHMAT is syscall SYS_SHMAT constant
|
|
SYS_SHMAT = 228
|
|
// SYS_SHMDT is syscall SYS_SHMDT constant
|
|
SYS_SHMDT = 230
|
|
// SYS_SHMCTL is syscall SYS_SHMCTL constant
|
|
SYS_SHMCTL = 229
|
|
)
|
|
|
|
// Open returns the fd.
|
|
func Open(name string, oflag int, mode int) (int, error) {
|
|
n, err := syscall.BytePtrFromString(name)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
fd, _, errno := syscall.Syscall(syscall.SYS_SHM_OPEN, uintptr(unsafe.Pointer(n)), uintptr(oflag), uintptr(mode))
|
|
if errno != 0 {
|
|
return 0, errno
|
|
}
|
|
return int(fd), nil
|
|
}
|
|
|
|
// Unlink unlinks the name.
|
|
func Unlink(name string) error {
|
|
n, err := syscall.BytePtrFromString(name)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
_, _, errno := syscall.Syscall(syscall.SYS_SHM_UNLINK, uintptr(unsafe.Pointer(n)), 0, 0)
|
|
if errno != 0 {
|
|
return errno
|
|
}
|
|
return nil
|
|
}
|