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https://github.com/github/gh-stack.git
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Sameen Karim
24 lines
541 B
Go
24 lines
541 B
Go
//go:build !windows
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package stack
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import (
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"os"
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"syscall"
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)
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// tryLockFile attempts a non-blocking exclusive lock.
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// Returns nil on success, or an error if the lock is held by another process.
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func tryLockFile(f *os.File) error {
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return syscall.Flock(int(f.Fd()), syscall.LOCK_EX|syscall.LOCK_NB)
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}
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// isLockBusy reports whether err indicates the lock is held by another process.
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func isLockBusy(err error) bool {
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return err == syscall.EWOULDBLOCK
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}
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func unlockFile(f *os.File) {
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_ = syscall.Flock(int(f.Fd()), syscall.LOCK_UN)
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}
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