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// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package sync
import "unsafe"
// defined in package runtime
// Semacquire waits until *s > 0 and then atomically decrements it.
// It is intended as a simple sleep primitive for use by the synchronization
// library and should not be used directly.
func runtime_Semacquire(s *uint32)
// SemacquireMutex is like Semacquire, but for profiling contended Mutexes.
// If lifo is true, queue waiter at the head of wait queue.
// skipframes is the number of frames to omit during tracing, counting from
// runtime_SemacquireMutex's caller.
func runtime_SemacquireMutex(s *uint32, lifo bool, skipframes int)
// Semrelease atomically increments *s and notifies a waiting goroutine
// if one is blocked in Semacquire.
// It is intended as a simple wakeup primitive for use by the synchronization
// library and should not be used directly.
// If handoff is true, pass count directly to the first waiter.
// skipframes is the number of frames to omit during tracing, counting from
// runtime_Semrelease's caller.
func runtime_Semrelease(s *uint32, handoff bool, skipframes int)
// Approximation of notifyList in runtime/sema.go. Size and alignment must
// agree.
type notifyList struct {
wait uint32
notify uint32
lock uintptr
head unsafe.Pointer
tail unsafe.Pointer
}
// See runtime/sema.go for documentation.
func runtime_notifyListAdd(l *notifyList) uint32
// See runtime/sema.go for documentation.
func runtime_notifyListWait(l *notifyList, t uint32)
// See runtime/sema.go for documentation.
func runtime_notifyListNotifyAll(l *notifyList)
// See runtime/sema.go for documentation.
func runtime_notifyListNotifyOne(l *notifyList)
// Ensure that sync and runtime agree on size of notifyList.
func runtime_notifyListCheck(size uintptr)
func init() {
var n notifyList
runtime_notifyListCheck(unsafe.Sizeof(n))
}
// Active spinning runtime support.
// runtime_canSpin reports whether spinning makes sense at the moment.
func runtime_canSpin(i int) bool
// runtime_doSpin does active spinning.
func runtime_doSpin()
func runtime_nanotime() int64