// a mutex several times in a row even if there are blocked waiters.
	// Starvation mode is important to prevent pathological cases of tail latency.
	starvationThresholdNs = 1e6
)

// Lock locks m.
// If the lock is already in use, the calling goroutine
// blocks until the mutex is available.
func (m *Mutex) Lock() {
	// Fast path: grab unlocked mutex.

// Compile modifies f so that on return:
//   - all Values in f map to 0 or 1 assembly instructions of the target architecture
//   - the order of f.Blocks is the order to emit the Blocks
//   - the order of b.Values is the order to emit the Values in each Block
//   - f has a non-nil regAlloc field
func Compile(f *Func) {
	// TODO: debugging - set flags to control verbosity of compiler,
	// which phases to dump IR before/after, etc.

		// If there are no direct-only or indirect-only blocks, a new block may
		// be inserted after the last require line or block.
		lastRequireIndex = -1

		// If there's only one require line or block, and it's uncommented,
		// we'll move its requirements to the direct-only or indirect-only blocks.
		requireLineOrBlockCount = 0

		// Track the block each requirement belongs to (if any) so we can
		// move them later.

	EvGoBlock           event.Type = 20 // goroutine blocks [timestamp, stack]
	EvGoUnblock         event.Type = 21 // goroutine is unblocked [timestamp, goroutine id, seq, stack]
	EvGoBlockSend       event.Type = 22 // goroutine blocks on chan send [timestamp, stack]
	EvGoBlockRecv       event.Type = 23 // goroutine blocks on chan recv [timestamp, stack]
	EvGoBlockSelect     event.Type = 24 // goroutine blocks on select [timestamp, stack]

            tasks.getByPath(':b:pingC').dependsOn([':b:pingA', ':b:pingB'])
        """

        expect:
        //project a and b are both executed even though alphabetically more important task is blocked
        blockingServer.expectConcurrent(':b:pingB', ':a:pingA')
        blockingServer.expect(':b:pingA')
        blockingServer.expect(':b:pingC')

        run 'b:pingC'
    }

    /**
     * Submits an arbitrary number of runnable operations, created synchronously by the scheduling action, to be executed in the global
     * build operation thread pool. Operations may execute concurrently. Blocks until all operations are complete.
     *
     * <p>Actions are not permitted to access any mutable project state. Generally, this is preferred.</p>
     */

     */
    void registerWork(BuildOperationRef operation, AsyncWorkCompletion completion);

    /**
     * Blocks waiting for the completion of all items of asynchronous work associated with the provided build operation.
     * Only waits for work that has been registered at the moment the method is called.  In the event that there are failures in

// The operations on the inner lists of sudogs with the same address
// are all O(1). The scanning of the top-level semaRoot list is O(log n),
// where n is the number of distinct addresses with goroutines blocked
// on them that hash to the given semaRoot.
// See golang.org/issue/17953 for a program that worked badly
// before we introduced the second level of list, and

	// May sure that the watch will not be blocked on Stop.
	for i := 0; i < maxRetriesToProduceTheRaceCondition; i++ {
		w = newCacheWatcher(0, filter, forget, storage.APIObjectVersioner{}, time.Now(), false, schema.GroupResource{Resource: "pods"}, "")
		go w.Stop()
		select {
		case <-done:
		case <-time.After(time.Second):
			t.Fatal("stop is blocked when the timer is fired concurrently")
		}
	}

import javax.annotation.Nullable;
import javax.inject.Inject;

/**
 * Universal APIs that are available for all {@code dependencies} blocks.
 *
 * @apiNote This interface is intended to be used to mix-in DSL methods for {@code dependencies} blocks.
 * @implSpec The default implementation of all methods should not be overridden.
 * @implNote Changes to this interface may require changes to the