// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package cmd

import (
	"io"
	"os"
	"syscall"
)

func access(name string) error {
	_, err := os.Lstat(name)
	return err
}

func osMkdirAll(dirPath string, perm os.FileMode, _ string) error {
	// baseDir is not honored in plan9 and solaris platforms.
	return os.MkdirAll(dirPath, perm)
}

	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
}

// GetNonBlocking will return the singleton value or nil if not set yet.
func (s *Singleton[T]) GetNonBlocking() *T {
	select {
	case <-s.set:

	group       *singleflight.Group
	metadataMap map[string]BucketMetadata
}

// Count returns number of bucket metadata map entries.
func (sys *BucketMetadataSys) Count() int {
	sys.RLock()
	defer sys.RUnlock()

	return len(sys.metadataMap)
}

// Remove bucket metadata from memory.
func (sys *BucketMetadataSys) Remove(buckets ...string) {
	sys.Lock()
	for _, bucket := range buckets {
		sys.group.Forget(bucket)

	}
}

// Tests lock directory fail.
func TestLockDirFail(t *testing.T) {
	d := t.TempDir()

	_, err := LockedOpenFile(d, os.O_APPEND, 0o600)
	if err == nil {
		t.Fatal("Should fail here")
	}
}

// Tests rwlock methods.
func TestRWLockedFile(t *testing.T) {
	f, err := os.CreateTemp(t.TempDir(), "lock")
	if err != nil {
		t.Fatal(err)
	}
	f.Close()
	defer func() {
		err = os.Remove(f.Name())

			return 0, errors.New("Invalid offset")
		}
		d.idx = d.length + offset
	}
	return d.idx, nil
}

func TestDummyDataGenerator(t *testing.T) {
	readAll := func(r io.Reader) string {
		b, _ := io.ReadAll(r)
		return string(b)
	}
	checkEq := func(a, b string) {
		if a != b {
			t.Fatalf("Unexpected equality failure")
		}
	}

	checkEq(readAll(NewDummyDataGen(0, 0)), "")

func (p *scannerMetrics) currentPathUpdater(disk, initial string) (update func(path string), done func()) {
	initialPtr := unsafe.Pointer(&initial)
	tracker := &currentPathTracker{
		name: &initialPtr,
	}

	p.currentPaths.Store(disk, tracker)
	return func(path string) {
			atomic.StorePointer(tracker.name, unsafe.Pointer(&path))
		}, func() {
			p.currentPaths.Delete(disk)
		}
}

// Validate validates if the replicate resource type is recognized and supported
func (t BatchJobReplicateResourceType) Validate() error {
	switch t {
	case BatchJobReplicateResourceMinIO:
	case BatchJobReplicateResourceS3:
	default:
		return errInvalidArgument
	}
	return nil
}

func (t BatchJobReplicateResourceType) isMinio() bool {
	return t == BatchJobReplicateResourceMinIO
}

	"github.com/minio/minio/internal/logger"
)

// Erasure - erasure encoding details.
type Erasure struct {
	encoder                  func() reedsolomon.Encoder
	dataBlocks, parityBlocks int
	blockSize                int64
}

// NewErasure creates a new ErasureStorage.
func NewErasure(ctx context.Context, dataBlocks, parityBlocks int, blockSize int64) (e Erasure, err error) {
	// Check the parameters for sanity now.

			}
		}
	}
}

func BenchmarkInitStorageDisks256(b *testing.B) {
	benchmarkInitStorageDisksN(b, 256)
}

func BenchmarkInitStorageDisks1024(b *testing.B) {
	benchmarkInitStorageDisksN(b, 1024)
}

func BenchmarkInitStorageDisks2048(b *testing.B) {
	benchmarkInitStorageDisksN(b, 2048)
}

func BenchmarkInitStorageDisksMax(b *testing.B) {

func (z ErasureAlgo) Msgsize() (s int) {
	s = msgp.Uint8Size
	return
}

// DecodeMsg implements msgp.Decodable
func (z *VersionType) DecodeMsg(dc *msgp.Reader) (err error) {
	{
		var zb0001 uint8
		zb0001, err = dc.ReadUint8()
		if err != nil {
			err = msgp.WrapError(err)
			return
		}
		(*z) = VersionType(zb0001)
	}
	return
}

// EncodeMsg implements msgp.Encodable