StartTime: asof,
	}); err != nil {
		log.Printf("upload failed: %v", err)
	}
}

// acquireUploadToken acquires a token permitting the caller to upload.
// To limit the frequency of uploads, only one token is issue per
// machine per time period.
// The boolean indicates whether the token was acquired.
func acquireUploadToken() bool {
	if telemetry.Default.LocalDir() == "" {

        final File lockFile = new File(destDir, destFileName + ".lock");
        final FileLock fileLock = exclusiveLockFor(lockFile);
        try {
            if (receipt.isFile()) {
                // Lock was acquired after a concurrent writer had already finished.
                return transformed;
            }
            transform(source, transformed, typeRegistry);
            try {
                receipt.createNewFile();

     * action and reacquired at the end.
     */
    void blocking(Runnable action);

    /**
     * Runs the given action and disallows the current thread from attempting to acquire or release any project locks.
     * Applying this constraint means that the thread will not block waiting for a project lock and cause a deadlock.

		var ts timespec
		ts.setNsec(ns + nanotime())
		tsp = &ts
	}

	for {
		v := atomic.Load(&gp.m.waitsemacount)
		if v > 0 {
			if atomic.Cas(&gp.m.waitsemacount, v, v-1) {
				return 0 // semaphore acquired
			}
			continue
		}

		// Sleep until woken by semawakeup or timeout; or abort if waitsemacount != 0.
		//
		// From OpenBSD's __thrsleep(2) manual:

// sysStatsAggregate represents system memory stats obtained
// from the runtime. This set of stats is grouped together because
// they're all relatively cheap to acquire and generally independent
// of one another and other runtime memory stats. The fact that they
// may be acquired at different times, especially with respect to
// heapStatsAggregate, means there could be some skew, but because of

* For HTTPS, **the server** needs to **have "certificates"** generated by a **third party**.
    * Those certificates are actually **acquired** from the third party, not "generated".
* Certificates have a **lifetime**.
    * They **expire**.
    * And then they need to be **renewed**, **acquired again** from the third party.
* The encryption of the connection happens at the **TCP level**.
    * That's one layer **below HTTP**.

	log *istiolog.Scope

	// recomputeMu blocks a recomputation of I->O.
	recomputeMu sync.Mutex

	// mu protects all items grouped below.
	// This is acquired for reads and writes of data.
	// This can be acquired with recomputeMu held, but only with strict ordering (mu inside recomputeMu)
	mu              sync.Mutex
	collectionState multiIndex[I, O]

    if (prev == mu) {
      // It is an error to pass the same variable handle twice to the same XLA
      // cluster because we would not handle variable updates correctly.  Any
      // locks we have already acquired will be released when the VariableInfo
      // objects are destroyed.
      // TODO(b/128495870) Add support for passing aliased resource variables.
      return errors::Unimplemented("Duplicate variable passed to XLA cluster");

        when:
        contendedAction.accept({} as FileLockReleasedSignal)

        then:
        1 * lock.close()
    }

    def "file access requires acquired lock"() {
        def runnable = Mock(Runnable)
        def access = newAccess(mode)

        given:
        lockManager.lock(lockFile, mode(Exclusive), "<display-name>", "", _ as Consumer) >> lock

	nextGen := traceNextGen(gen)
	r.seq[nextGen%2] = 0
	r.statusTraced[nextGen%3].Store(0)
}

// statusWasTraced returns true if the sched resource's status was already acquired for tracing.
func (r *traceSchedResourceState) statusWasTraced(gen uintptr) bool {
	return r.statusTraced[gen%3].Load() != 0
}

// setStatusTraced indicates that the resource's status was already traced, for example