// Singleton contains a pointer to T that must be set once.
// Until the value is set all Get() calls will block.
type Singleton[T any] struct {
	v   *T
	set chan struct{}
}

// NewSingleton creates a new unset singleton.
func NewSingleton[T any]() *Singleton[T] {
	return &Singleton[T]{set: make(chan struct{}), v: nil}
}

// Get will return the singleton value.
func (s *Singleton[T]) Get() *T {
	<-s.set
	return s.v
}

	"net/url"
	"strings"
	"sync"
	"time"
)

const defaultFlushInterval = time.Duration(100) * time.Millisecond

// Forwarder forwards all incoming HTTP requests to configured transport.
type Forwarder struct {
	RoundTripper http.RoundTripper
	PassHost     bool
	Logger       func(error)
	ErrorHandler func(http.ResponseWriter, *http.Request, error)

	// internal variables
	rewriter *headerRewriter
}

func (d *DeadlineWorker) Run(work func() error) error {
	_, err := WithDeadline[struct{}](context.Background(), d.timeout, func(ctx context.Context) (struct{}, error) {
		return struct{}{}, work()
	})
	return err
}

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

	if embeddedRelations == nil {
		return nil
	}
	names := make([]string, 0, len(embeddedRelations.Relations)+len(embeddedRelations.EmbeddedRelations))
	for _, relation := range embeddedRelations.Relations {
		// skip first struct name
		names = append(names, strings.Join(relation.Field.EmbeddedBindNames[1:], "."))
	}
	for _, relations := range embeddedRelations.EmbeddedRelations {
		names = append(names, embeddedValues(relations)...)
	}

	})
}

func TestJoinsPreload_Issue7013_RelationEmpty(t *testing.T) {
	type (
		Furniture struct {
			gorm.Model
			OwnerID *uint
		}

		Owner struct {
			gorm.Model
			Furnitures []Furniture
			CompanyID  *uint
			Company    Company
		}

		Building struct {
			gorm.Model
			Name    string
			OwnerID *uint
			Owner   Owner
		}
	)

	"github.com/minio/minio-go/v7/pkg/encrypt"
	"github.com/minio/minio/internal/crypto"
	xhttp "github.com/minio/minio/internal/http"
	"github.com/minio/sio"
)

var encryptRequestTests = []struct {
	header   map[string]string
	metadata map[string]string
}{
	{
		header: map[string]string{
			xhttp.AmzServerSideEncryptionCustomerAlgorithm: "AES256",

type WaitGroup struct {
	count int32
	done  chan struct{}
}

func NewWaitGroup() *WaitGroup {
	return &WaitGroup{
		done: make(chan struct{}),
	}
}

func NewWaitForNCalls(t *testing.T, n int32) (*WaitGroup, func()) {
	wg := &WaitGroup{
		done: make(chan struct{}),
	}

	wg.Add(n)
	return wg, func() {
		select {

	DelInpodMarkIPRule(cfg *Config) error
	AddLoopbackRoutes(cfg *Config) error
	DelLoopbackRoutes(cfg *Config) error
}

func RealNlDeps() NetlinkDependencies {
	return &realDeps{}
}

type realDeps struct{}

func (r *realDeps) AddInpodMarkIPRule(cfg *Config) error {
	return AddInpodMarkIPRule(cfg)
}

func (r *realDeps) DelInpodMarkIPRule(cfg *Config) error {
	return DelInpodMarkIPRule(cfg)
}

package cmd

import (
	"fmt"
	"testing"

	"github.com/dustin/go-humanize"
)

func TestSizeHistogramToMap(t *testing.T) {
	tests := []struct {
		sizes []int64
		want  map[string]uint64
	}{
		{
			sizes: []int64{100, 1000, 72_000, 100_000},
			want: map[string]uint64{
				"LESS_THAN_1024_B":         2,
				"BETWEEN_64_KB_AND_256_KB": 2,

	globalServiceFreezeMu.Lock()
	// Close when we reach 0
	globalServiceFreezeCnt--
	if globalServiceFreezeCnt <= 0 {
		// Set to a nil channel.
		var _ch chan struct{}
		if val := globalServiceFreeze.Swap(_ch); val != nil {
			if ch, ok := val.(chan struct{}); ok && ch != nil {
				// Close previous non-nil channel.
				xioutil.SafeClose(ch)
			}
		}
		globalServiceFreezeCnt = 0 // Don't risk going negative.
	}