/
helpers_linux.go
77 lines (61 loc) · 2.21 KB
/
helpers_linux.go
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// +build linux
/*
* Copyright (c) 2017 AlexRuzin (stan.ruzin@gmail.com)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package util
import (
"os"
"sync"
)
const ROOT_MUTEX_DIRECTORY = "/tmp/"
/*
* A n-length map containing the mutex name, and the handle object as the value
*/
var (
syncMap = make(map[string]uintptr)
syncObj sync.Mutex
)
/* -- These below methods are obsolete. Please see util.SynchronizeGlobalMutex()
func CreateMutexGlobal(name string) (uintptr, error) {
syncObj.Lock()
defer syncObj.Unlock()
mutexName := genMutexName(name)
var fd_lock = syscall.Open(mutexName, syscall.O_CREAT)
if fd_lock == -1 {
return 0, RetErrStr("Failed to obtain mutex lock: " + mutexName)
}
syscall.Flock(fd_lock, syscall.LOCK_EX)
syncMap[name] = fd_lock
return 0, nil
}
func CloseGlobalMutex(name string) error {
syncObj.Lock()
defer syncObj.Unlock()
mutexName := genMutexName(name)
syscall.Flock(fd_lock, syscall.LOCK_UN)
syscall.Close(syncMap[name])
delete(syncMap[name])
}
*/
func genMutexName(name string) string {
hostname, _ := os.Hostname()
return ROOT_MUTEX_DIRECTORY + hostname + "_" + name + "_util.mutex"
}