Source: runtime.go in package sync


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)

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()