57 lines
1.6 KiB
Go
57 lines
1.6 KiB
Go
// Copyright 2012 The Go 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 sync
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import "unsafe"
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// defined in package runtime
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// Semacquire waits until *s > 0 and then atomically decrements it.
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// It is intended as a simple sleep primitive for use by the synchronization
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// library and should not be used directly.
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func runtime_Semacquire(s *uint32)
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// Semrelease atomically increments *s and notifies a waiting goroutine
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// if one is blocked in Semacquire.
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// It is intended as a simple wakeup primitive for use by the synchronization
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// library and should not be used directly.
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func runtime_Semrelease(s *uint32)
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// Approximation of notifyList in runtime/sema.go. Size and alignment must
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// agree.
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type notifyList struct {
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wait uint32
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notify uint32
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lock uintptr
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head unsafe.Pointer
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tail unsafe.Pointer
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}
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// See runtime/sema.go for documentation.
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func runtime_notifyListAdd(l *notifyList) uint32
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// See runtime/sema.go for documentation.
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func runtime_notifyListWait(l *notifyList, t uint32)
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// See runtime/sema.go for documentation.
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func runtime_notifyListNotifyAll(l *notifyList)
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// See runtime/sema.go for documentation.
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func runtime_notifyListNotifyOne(l *notifyList)
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// Ensure that sync and runtime agree on size of notifyList.
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func runtime_notifyListCheck(size uintptr)
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func init() {
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var n notifyList
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runtime_notifyListCheck(unsafe.Sizeof(n))
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}
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// Active spinning runtime support.
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// runtime_canSpin returns true is spinning makes sense at the moment.
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func runtime_canSpin(i int) bool
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// runtime_doSpin does active spinning.
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func runtime_doSpin()
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