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997b19545b
The docs say: Note that while correct uses of TryLock do exist, they are rare, and use of TryLock is often a sign of a deeper problem in a particular use of mutexes. Rare code! Or bad code! Who can tell! Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
34 lines
698 B
Go
34 lines
698 B
Go
// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package syncs
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import (
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"sync"
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)
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// AssertLocked panics if m is not locked.
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func AssertLocked(m *sync.Mutex) {
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if m.TryLock() {
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m.Unlock()
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panic("mutex is not locked")
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}
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}
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// AssertRLocked panics if rw is not locked for reading or writing.
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func AssertRLocked(rw *sync.RWMutex) {
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if rw.TryLock() {
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rw.Unlock()
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panic("mutex is not locked")
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}
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}
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// AssertWLocked panics if rw is not locked for writing.
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func AssertWLocked(rw *sync.RWMutex) {
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if rw.TryRLock() {
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rw.RUnlock()
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panic("mutex is not rlocked")
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}
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}
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