</p>

<p class="rule">
For any call to <code>l.RLock</code> on a <code>sync.RWMutex</code> variable <code>l</code>,
there is an <i>n</i> such that the <i>n</i>th call to <code>l.Unlock</code>
is synchronized before the return from <code>l.RLock</code>,
and the matching call to <code>l.RUnlock</code> is synchronized before the return from call <i>n</i>+1 to <code>l.Lock</code>.
</p>

<p class="rule">

				p.mu.RLock()
				workers := min(len(p.workers)+1, maxWorkers)
				existing := len(p.workers)
				p.mu.RUnlock()
				p.ResizeWorkers(workers, existing)
			}
			maxMRFWorkers := min(maxWorkers, MRFWorkerMaxLimit)
			if p.ActiveMRFWorkers() < maxMRFWorkers {
				p.mu.RLock()
				workers := min(p.mrfWorkerSize+1, maxMRFWorkers)
				p.mu.RUnlock()
				p.ResizeFailedWorkers(workers)

      } finally {
        unlock();
        postWriteCleanup();
      }
    }

    // reference queues, for garbage collection cleanup

    /** Cleanup collected entries when the lock is available. */
    void tryDrainReferenceQueues() {
      if (tryLock()) {
        try {
          drainReferenceQueues();
        } finally {
          unlock();
        }
      }
    }

	}
}

func (h *Target) startQueueProcessor(ctx context.Context, mainWorker bool) {
	h.logChMu.RLock()
	if h.logCh == nil {
		h.logChMu.RUnlock()
		return
	}
	h.logChMu.RUnlock()

	atomic.AddInt64(&h.workers, 1)
	defer atomic.AddInt64(&h.workers, -1)

	h.wg.Add(1)
	defer h.wg.Done()

	entries := make([]interface{}, 0)

			nsUnlocker()
		}
	}()

	// Acquire lock
	if !opts.NoLock {
		lock := er.NewNSLock(bucket, object)
		lkctx, err := lock.GetRLock(ctx, globalOperationTimeout)
		if err != nil {
			return nil, err
		}
		ctx = lkctx.Context()

		// Release lock when the metadata is verified, and reader
		// is ready to be read.
		//
		// This is possible to be lock free because

}

func (c *ilmConfig) getExpirationWorkers() int {
	c.mu.RLock()
	defer c.mu.RUnlock()

	return c.cfg.ExpirationWorkers
}

func (c *ilmConfig) getTransitionWorkers() int {
	c.mu.RLock()
	defer c.mu.RUnlock()

	return c.cfg.TransitionWorkers
}

func (c *ilmConfig) update(cfg ilm.Config) {
	c.mu.Lock()
	defer c.mu.Unlock()

	c.cfg = cfg

	globalObjLayerMutex.Lock()
	globalConsoleSrv = srv
	globalObjLayerMutex.Unlock()
}

func newObjectLayerFn() ObjectLayer {
	globalObjLayerMutex.RLock()
	defer globalObjLayerMutex.RUnlock()
	return globalObjectAPI
}

func setObjectLayer(o ObjectLayer) {
	globalObjLayerMutex.Lock()
	globalObjectAPI = o
	globalObjLayerMutex.Unlock()
}

// objectAPIHandler implements and provides http handlers for S3 API.

// GetCSPolicy - Get the Content security Policy
func (browseCfg *Config) GetCSPolicy() string {
	configLock.RLock()
	defer configLock.RUnlock()
	return browseCfg.CSPPolicy
}

// GetHSTSSeconds - Get the Content security Policy
func (browseCfg *Config) GetHSTSSeconds() int {
	configLock.RLock()
	defer configLock.RUnlock()
	return browseCfg.HSTSSeconds
}

func newSrvConfig(objAPI ObjectLayer) error {
	// Initialize server config.
	srvCfg := newServerConfig()

	// hold the mutex lock before a new config is assigned.
	globalServerConfigMu.Lock()
	globalServerConfig = srvCfg
	globalServerConfigMu.Unlock()

	// Save config into file.
	return saveServerConfig(GlobalContext, objAPI, srvCfg)
}

	if opts.CheckPrecondFn != nil {
		// Lock the object before reading.
		lk := er.NewNSLock(bucket, object)
		lkctx, err := lk.GetRLock(ctx, globalOperationTimeout)
		if err != nil {
			return nil, err
		}
		rctx := lkctx.Context()
		obj, err := er.getObjectInfo(rctx, bucket, object, opts)
		lk.RUnlock(lkctx)
		if err != nil && !isErrVersionNotFound(err) && !isErrObjectNotFound(err) {