"fmt"
	"maps"
	"path"
	"strings"
	"sync"
	"time"
	"unicode/utf8"

	jsoniter "github.com/json-iterator/go"
	"github.com/minio/madmin-go/v3"
	"github.com/minio/minio/internal/config"
	xioutil "github.com/minio/minio/internal/ioutil"
	"github.com/minio/minio/internal/kms"
	"github.com/minio/minio/internal/logger"
	"github.com/minio/pkg/v3/sync/errgroup"
	"github.com/puzpuzpuz/xsync/v3"
)

	kvDstPool   bpool.Pool[[]jstream.KVS] // pool of []jstream.KVS used for output
	close       chan struct{}             // used for shutting down the splitter before end of stream
	readerWg    sync.WaitGroup            // used to keep track of async reader.
}

// queueItem is an item in the queue.
type queueItem struct {
	input []byte             // raw input sent to the worker
	dst   chan []jstream.KVS // result of block decode

...

		id:                 o.id,
		ctx:                o.ctx,
		outgoing:           xsync.NewMapOfPresized[uint64, *muxClient](1000),
		inStream:           xsync.NewMapOfPresized[uint64, *muxServer](1000),
		outQueue:           make(chan []byte, defaultOutQueue),
		side:               ws.StateServerSide,
		connChange:         &sync.Cond{L: &sync.Mutex{}},
		handlers:           o.handlers,
		remote:             &RemoteClient{Name: o.remote},

// The result channel is closed when no more results are expected.
func (z *erasureServerPools) listMerged(ctx context.Context, o listPathOptions, results chan<- metaCacheEntry) error {
	var mu sync.Mutex
	var wg sync.WaitGroup
	var errs []error
	allAtEOF := true
	var inputs []chan metaCacheEntry
	mu.Lock()
	// Ask all sets and merge entries.
	listCtx, cancelList := context.WithCancel(ctx)
	defer cancelList()

### Sync/Async Replication

By default, replication is completed asynchronously. If synchronous replication is desired, set the --sync flag while adding a
remote replication target using the `mc admin bucket remote add` command. For mc releases on or after `RELEASE.2022-12-24T15-21-38Z`, the 

			close(fd, callback) { callback(enosys()); },
			fchmod(fd, mode, callback) { callback(enosys()); },
			fchown(fd, uid, gid, callback) { callback(enosys()); },
			fstat(fd, callback) { callback(enosys()); },
			fsync(fd, callback) { callback(null); },
			ftruncate(fd, length, callback) { callback(enosys()); },
			lchown(path, uid, gid, callback) { callback(enosys()); },
			link(path, link, callback) { callback(enosys()); },

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

package grid

import (
	"context"
	"encoding/binary"
	"errors"
	"fmt"
	"sync"
	"sync/atomic"
	"time"

	xioutil "github.com/minio/minio/internal/ioutil"
	"github.com/zeebo/xxh3"
)

// muxClient is a stateful connection to a remote.
type muxClient struct {
	MuxID              uint64

	csvDstPool   bpool.Pool[[][]string] // pool of [][]string used for output
	close        chan struct{}          // used for shutting down the splitter before end of stream
	readerWg     sync.WaitGroup         // used to keep track of async reader.
}

// queueItem is an item in the queue.
type queueItem struct {
	input []byte          // raw input sent to the worker
	dst   chan [][]string // result of block decode

	iamGroupPolicyMap *xsync.MapOf[string, MappedPolicy]
}

func newIamCache() *iamCache {
	return &iamCache{
		iamPolicyDocsMap:        map[string]PolicyDoc{},
		iamUsersMap:             map[string]UserIdentity{},
		iamUserPolicyMap:        xsync.NewMapOf[string, MappedPolicy](),
		iamSTSAccountsMap:       map[string]UserIdentity{},
		iamSTSPolicyMap:         xsync.NewMapOf[string, MappedPolicy](),