Golang1.7.3实现启动单一实例代码片段
发布时间:2020-12-16 18:23:40 所属栏目:大数据 来源:网络整理
导读:var ( NameMutex = "Shamem" kernel = syscall.NewLazyDLL( "kernel32.dll" )) const ( IPC_RMID = 0 IPC_CREAT = 00001000 IPC_EXCL = 00002000 IPC_NOWAIT = 00004000 ) func Lock_windows(Name string ) ( uintptr , bool ) { id,_,err := kernel.NewProc
var (
NameMutex = "Shamem"
kernel = syscall.NewLazyDLL("kernel32.dll")
)
const (
IPC_RMID = 0
IPC_CREAT = 00001000
IPC_EXCL = 00002000
IPC_NOWAIT = 00004000
)
func Lock_windows(Name string) (uintptr,bool) {
id,_,err := kernel.NewProc("CreateMutexA").Call(0, 1,uintptr(unsafe.Pointer(&NameMutex)))
if err.Error() != "The operation completed successfully" {
return 0,false
}
return id,true
}
func UnLock_windows(id uintptr) {
syscall.CloseHandle(syscall.Handle(id))
}
下面是linux系统上面的实现用的是使用共享内存的方法
func Lock_linux(Name string) (uintptr,err := syscall.Syscall6(syscall.SYS_SHMGET,uintptr(unsafe.Pointer(&NameMutex)),IPC_CREAT|IPC_EXCL, 0, 0)
if err.Error() != "errno 0" {
return 0,true
}
func UnLock_linux(id uintptr) {
syscall.Syscall6(syscall.SYS_SHMCTL,id,IPC_RMID, 0)
}
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