)

// API sub-system constants
const (
	apiRequestsMax             = "requests_max"
	apiRequestsDeadline        = "requests_deadline"
	apiClusterDeadline         = "cluster_deadline"
	apiCorsAllowOrigin         = "cors_allow_origin"
	apiRemoteTransportDeadline = "remote_transport_deadline"
	apiListQuorum              = "list_quorum"
	apiReplicationPriority     = "replication_priority"

}

type ioret[V any] struct {
	val V
	err error
}

// DeadlineWriter deadline writer with timeout
type DeadlineWriter struct {
	io.WriteCloser
	timeout time.Duration
	err     error
}

// WithDeadline will execute a function with a deadline and return a value of a given type.
// If the deadline/context passes before the function finishes executing,
// the zero value and the context error is returned.

	},
	cli.DurationFlag{
		Name:   "conn-client-read-deadline",
		Usage:  "custom connection READ deadline for incoming requests",
		Hidden: true,
		EnvVar: "MINIO_CONN_CLIENT_READ_DEADLINE",
	},
	cli.DurationFlag{
		Name:   "conn-client-write-deadline",
		Usage:  "custom connection WRITE deadline for outgoing requests",
		Hidden: true,
		EnvVar: "MINIO_CONN_CLIENT_WRITE_DEADLINE",
	},
	cli.DurationFlag{

		Payload:    req,
		DeadlineMS: uint32(m.deadline.Milliseconds()),
	}
	if m.subroute != nil {
		msg.Flags |= FlagSubroute
	}
	ch := make(chan Response, 1)
	m.respMu.Lock()
	if m.closed {
		m.respMu.Unlock()
		return nil, ErrDisconnected
	}
	m.respWait = ch
	m.respMu.Unlock()
	ctx := m.ctx

	// Add deadline if none.
	if msg.DeadlineMS == 0 {

func (c *Connection) newMuxClient(ctx context.Context) (*muxClient, error) {
	client := newMuxClient(ctx, atomic.AddUint64(&c.NextID, 1), c)
	if dl, ok := ctx.Deadline(); ok {
		client.deadline = getDeadline(time.Until(dl))
		if client.deadline == 0 {
			client.cancelFn(context.DeadlineExceeded)
			return nil, context.DeadlineExceeded
		}
	}
	for {
		// Handle the extremely unlikely scenario that we wrapped.

     * execute Queue#drainTo is not added *on top* of waiting for the timeout (which could make
     * the timeout arbitrarily inaccurate, given a queue that is slow to drain).
     */
    long deadline = System.nanoTime() + unit.toNanos(timeout);
    int added = 0;
    while (added < numElements) {
      // we could rely solely on #poll, but #drainTo might be more efficient when there are multiple

	ctxt.UserTimeout = ctx.Duration("conn-user-timeout")
	ctxt.ConnReadDeadline = ctx.Duration("conn-read-deadline")
	ctxt.ConnWriteDeadline = ctx.Duration("conn-write-deadline")
	ctxt.ConnClientReadDeadline = ctx.Duration("conn-client-read-deadline")
	ctxt.ConnClientWriteDeadline = ctx.Duration("conn-client-write-deadline")
	ctxt.SendBufSize = ctx.Int("send-buf-size")
	ctxt.RecvBufSize = ctx.Int("recv-buf-size")

					}
				}
			}
		}

		pool, deadline := globalAPIConfig.getRequestsPool()
		if pool == nil {
			f.ServeHTTP(w, r)
			return
		}

		globalHTTPStats.addRequestsInQueue(1)

		if tc, ok := r.Context().Value(mcontext.ContextTraceKey).(*mcontext.TraceCtxt); ok {
			tc.FuncName = "s3.MaxClients"
		}

		deadlineTimer := time.NewTimer(deadline)
		defer deadlineTimer.Stop()

		select {

}

// Call the remote with the request and return the response.
// The response should be returned with PutResponse when no error.
// If no deadline is set, a 1-minute deadline is added.
func (h *SingleHandler[Req, Resp]) Call(ctx context.Context, c Requester, req Req) (resp Resp, err error) {
	if c == nil {
		if h.ignoreNilConn {
			return resp, nil
		}

			Handle: func(ctx context.Context, payload []byte, request <-chan []byte, resp chan<- []byte) *RemoteErr {
				started := time.Now()
				dl, _ := ctx.Deadline()
				if testing.Verbose() {
					fmt.Println(GetCaller(ctx).Name, "Server deadline:", time.Until(dl))
				}
				<-ctx.Done()
				serverCanceled <- time.Since(started)
				if testing.Verbose() {