mirror of https://github.com/hslam/shm.git
49 lines
1.1 KiB
Go
49 lines
1.1 KiB
Go
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// Copyright (c) 2020 Meng Huang (mhboy@outlook.com)
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// This package is licensed under a MIT license that can be found in the LICENSE file.
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// +build darwin dragonfly netbsd openbsd
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package shm
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import (
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"syscall"
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"unsafe"
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)
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const (
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// SYS_SHMGET is syscall SYS_SHMGET constant
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SYS_SHMGET = syscall.SYS_SHMGET
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// SYS_SHMAT is syscall SYS_SHMAT constant
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SYS_SHMAT = syscall.SYS_SHMAT
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// SYS_SHMDT is syscall SYS_SHMDT constant
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SYS_SHMDT = syscall.SYS_SHMDT
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// SYS_SHMCTL is syscall SYS_SHMCTL constant
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SYS_SHMCTL = syscall.SYS_SHMCTL
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)
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// Open returns the fd.
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func Open(name string, oflag int, mode int) (int, error) {
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n, err := syscall.BytePtrFromString(name)
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if err != nil {
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return 0, err
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}
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fd, _, errno := syscall.Syscall(syscall.SYS_SHM_OPEN, uintptr(unsafe.Pointer(n)), uintptr(oflag), uintptr(mode))
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if errno != 0 {
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return 0, errno
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}
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return int(fd), nil
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}
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// Unlink unlinks the name.
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func Unlink(name string) error {
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n, err := syscall.BytePtrFromString(name)
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if err != nil {
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return err
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}
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_, _, errno := syscall.Syscall(syscall.SYS_SHM_UNLINK, uintptr(unsafe.Pointer(n)), 0, 0)
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if errno != 0 {
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return errno
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}
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return nil
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}
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