// better done via channels and communication.
//
// Values containing the types defined in this package should not be copied.
package sync

import (
	"internal/race"
	"sync/atomic"
	"unsafe"
)

// Provided by runtime via linkname.
func throw(string)
func fatal(string)

// A Mutex is a mutual exclusion lock.
// The zero value for a Mutex is an unlocked mutex.
//

func runtime_procUnpin()

// The below are implemented in internal/runtime/atomic and the
// compiler also knows to intrinsify the symbol we linkname into this
// package.

//go:linkname runtime_LoadAcquintptr internal/runtime/atomic.LoadAcquintptr
func runtime_LoadAcquintptr(ptr *uintptr) uintptr

//go:linkname runtime_StoreReluintptr internal/runtime/atomic.StoreReluintptr

	grpcWorkloadListener net.Listener

	grpcWorkloadServer *grpc.Server
	stopped            *atomic.Bool
}

// NewServer creates and starts the Grpc server for SDS.
func NewServer(options *security.Options, workloadSecretCache security.SecretManager, pkpConf *mesh.PrivateKeyProvider) *Server {
	s := &Server{stopped: atomic.NewBool(false)}
	s.workloadSds = newSDSService(workloadSecretCache, options, pkpConf)
	s.initWorkloadSdsService()

	trace         *tracer       // tracer for this connection.
	baseFlags     Flags
	outBytes      atomic.Int64
	inBytes       atomic.Int64
	inMessages    atomic.Int64
	outMessages   atomic.Int64

	// For testing only
	debugInConn   net.Conn
	debugOutConn  net.Conn
	blockMessages atomic.Pointer[<-chan struct{}]
	addDeadline   time.Duration
	connMu        sync.Mutex
}

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build unix

package syscall

import (
	"sync/atomic"
)

// origRlimitNofile, if non-nil, is the original soft RLIMIT_NOFILE.
var origRlimitNofile atomic.Pointer[Rlimit]

// Some systems set an artificially low soft limit on open file count, for compatibility

// 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

	"istio.io/istio/pkg/ctrlz/assets"
	"istio.io/istio/pkg/ctrlz/fw"
	"istio.io/istio/pkg/ctrlz/topics"
	"istio.io/istio/pkg/log"
)

var coreTopics = []fw.Topic{
	topics.ScopeTopic(),
	topics.MemTopic(),
	topics.EnvTopic(),
	topics.ProcTopic(),
	topics.ArgsTopic(),
	topics.VersionTopic(),
	topics.SignalsTopic(),
}

var (
	allTopics          []fw.Topic
	topicMutex         sync.Mutex

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

package grid

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

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

type muxServer struct {
	ID                 uint64
	LastPing           int64
	SendSeq, RecvSeq   uint32
	Resp               chan []byte

	writerSem   uint32       // semaphore for writers to wait for completing readers
	readerSem   uint32       // semaphore for readers to wait for completing writers
	readerCount atomic.Int32 // number of pending readers
	readerWait  atomic.Int32 // number of departing readers
}

const rwmutexMaxReaders = 1 << 30

// Happens-before relationships are indicated to the race detector via:
// - Unlock  -> Lock:  readerSem

// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package sync

import (
	"sync/atomic"
)

// Once is an object that will perform exactly one action.
//
// A Once must not be copied after first use.
//
// In the terminology of [the Go memory model],
// the return from f “synchronizes before”