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By downgrading the lock, we ensure readers get some time to work. Otherwise, writers may take the lock back. The downgrade code was stolen from https://github.com/google/gvisor/tree/master/pkg/sync.
18 lines
457 B
Go
18 lines
457 B
Go
// SPDX-FileCopyrightText: 2009 The Go Authors
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// SPDX-License-Identifier: BSD-3-Clause
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package sync
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import (
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_ "unsafe" // use of go:linkname
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)
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//go:linkname semacquire sync.runtime_Semacquire
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func semacquire(addr *uint32)
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//go:linkname semacquireMutex sync.runtime_SemacquireMutex
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func semacquireMutex(s *uint32, lifo bool, skipframes int)
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//go:linkname semrelease sync.runtime_Semrelease
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func semrelease(addr *uint32, handoff bool, skipframes int)
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