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# 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.
```go
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
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