mirror of https://github.com/octoleo/restic.git
56 lines
1.1 KiB
Go
56 lines
1.1 KiB
Go
package record
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import (
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"sync"
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"time"
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"bazil.org/fuse"
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"bazil.org/fuse/fs"
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"golang.org/x/net/context"
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)
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type nothing struct{}
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// ReleaseWaiter notes whether a FUSE Release call has been seen.
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//
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// Releases are not guaranteed to happen synchronously with any client
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// call, so they must be waited for.
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type ReleaseWaiter struct {
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once sync.Once
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seen chan nothing
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}
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var _ = fs.HandleReleaser(&ReleaseWaiter{})
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func (r *ReleaseWaiter) init() {
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r.once.Do(func() {
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r.seen = make(chan nothing, 1)
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})
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}
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func (r *ReleaseWaiter) Release(ctx context.Context, req *fuse.ReleaseRequest) error {
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r.init()
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close(r.seen)
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return nil
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}
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// WaitForRelease waits for Release to be called.
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//
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// With zero duration, wait forever. Otherwise, timeout early
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// in a more controller way than `-test.timeout`.
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//
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// Returns whether a Release was seen. Always true if dur==0.
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func (r *ReleaseWaiter) WaitForRelease(dur time.Duration) bool {
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r.init()
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var timeout <-chan time.Time
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if dur > 0 {
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timeout = time.After(dur)
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}
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select {
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case <-r.seen:
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return true
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case <-timeout:
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return false
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}
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}
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