FileMutex

FileMutex is similar to sync.RWMutex, but also synchronizes across processes. On Linux, OSX, and other POSIX systems it uses the flock system call. On windows it uses the LockFileEx and UnlockFileEx system calls.

import (
    "log"
    "github.com/alexflint/go-filemutex"
)

func main() {
    m, err := filemutex.New("/tmp/foo.lock")
    if err != nil {
        log.Fatalln("Directory did not exist or file could not created")
    }

    m.Lock()  // Will block until lock can be acquired

    // Code here is protected by the mutex

    m.Unlock()
}

Installation

go get github.com/alexflint/go-filemutex

Forked from https://github.com/golang/build/tree/master/cmd/builder/filemutex_*.go