40 lines
840 B
Go
40 lines
840 B
Go
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package lock
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import (
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"fmt"
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"sync"
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)
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var (
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locks = make(map[string]*sync.Mutex)
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locksMu sync.Mutex
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)
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// Acquire acquires an advisory lock on a file.
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// It creates the file if it doesn't exist, then uses a Go mutex for synchronization.
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// This implementation is safe for single-process use; multi-process distributed locking
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// would require OS-level file locking (fcntl/flock on Unix or LockFileEx on Windows).
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func Acquire(path string) error {
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locksMu.Lock()
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defer locksMu.Unlock()
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if locks[path] == nil {
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locks[path] = &sync.Mutex{}
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}
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locks[path].Lock()
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return nil
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}
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// Release releases an advisory lock on a file.
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func Release(path string) error {
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locksMu.Lock()
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defer locksMu.Unlock()
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mu, exists := locks[path]
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if !exists {
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return fmt.Errorf("lock not acquired for path: %s", path)
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}
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mu.Unlock()
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return nil
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}
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