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

//go:generate msgp -file=$GOFILE

package cmd

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

	"github.com/google/uuid"
	"github.com/minio/madmin-go/v3"
	"github.com/minio/pkg/v3/wildcard"
	"github.com/tinylib/msgp/msgp"
)

const (
	mrfOpsQueueSize = 100000
)

	"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"
)

			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()); },

// 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()

	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](),

    async.setFuture(inner);
    async.cancel(false);
    assertTrue(inner.isCancelled());
    assertFalse(inner.wasInterrupted());
    assertThrows(CancellationException.class, () -> inner.get());
  }

  public void testCancel_beforeSet() throws Exception {
    SettableFuture<Object> async = SettableFuture.create();
    async.cancel(true);
    assertFalse(async.set(42));
  }

	r, err := h.Call(ctx, c.connection, args)
	if err != nil {
		return false, err
	}
	defer h.PutResponse(r)
	ok = r.Code == dsync.RespOK
	switch r.Code {
	case dsync.RespLockConflict, dsync.RespLockNotFound, dsync.RespOK:
	// no error
	case dsync.RespLockNotInitialized:
		err = errLockNotInitialized

The first thing to notice, is that we are defining an async function with `yield`. This is very similar to Dependencies with `yield`.

{* ../../docs_src/events/tutorial003.py hl[14:19] *}

The first part of the function, before the `yield`, will be executed **before** the application starts.

And the part after the `yield` will be executed **after** the application has finished.

### Async Context Manager { #async-context-manager }

package cmd

import (
	"bytes"
	"context"
	"errors"
	"fmt"
	"io"
	"strconv"
	"strings"
	"sync"
	"time"

	"github.com/minio/madmin-go/v3"
	"github.com/minio/minio/internal/grid"
	"github.com/minio/minio/internal/logger"
	"github.com/minio/pkg/v3/sync/errgroup"
	"github.com/puzpuzpuz/xsync/v3"
)

//go:generate stringer -type=healingMetric -trimprefix=healingMetric $GOFILE

type healingMetric uint8

                } catch (InterruptedException e) {
                    log.debug("Async notification monitoring interrupted for {}", registrationId);
                    Thread.currentThread().interrupt();
                    break;
                } catch (Exception e) {
                    log.debug("Error in async notification monitoring for {}: {}", registrationId, e.getMessage());