//go:build moxie.unicore

package task

//go:linkname eventLoopTick runtime.eventLoopTick
func eventLoopTick()

type Mutex struct {
	locked  bool
	depth   int
	blocked Stack
}

func (m *Mutex) Lock() {
	// Single-threaded: allow reentrant locking (no contention possible).
	m.depth++
	m.locked = true
}

func (m *Mutex) Unlock() {
	if !m.locked {
		panic("sync: unlock of unlocked Mutex")
	}
	m.depth--
	if m.depth == 0 {
		m.locked = false
	}
}

// TryLock tries to lock m and reports whether it succeeded.
//
// 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.
func (m *Mutex) TryLock() bool {
	if m.locked {
		return false
	}
	m.Lock()
	return true
}