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#pragma once 

// unique tag to fix pragma once gcc glueing: ./library/cpp/messagebus/defs.h
 
#include "codegen.h"
#include "netaddr.h"

#include <library/cpp/deprecated/enum_codegen/enum_codegen.h>

#include <util/generic/list.h> 

#include <utility>
 
// For historical reasons TCrawlerModule need to access 
// APIs that should be private. 
class TCrawlerModule; 
 
struct TDebugReceiverHandler; 
 
namespace NBus { 
    namespace NPrivate {
        class TAcceptor;
        struct TBusSessionImpl;
        class TRemoteServerSession;
        class TRemoteClientSession;
        class TRemoteConnection;
        class TRemoteServerConnection;
        class TRemoteClientConnection;
        class TBusSyncSourceSessionImpl;
 
        struct TBusMessagePtrAndHeader;
 
        struct TSessionDumpStatus;
 
        struct TClientRequestImpl;
 
    }
 
    class TBusSession;
    struct TBusServerSession;
    struct TBusClientSession;
    class TBusProtocol;
    class TBusMessage;
    class TBusMessageConnection;
    class TBusMessageQueue;
    class TBusLocator;
    struct TBusQueueConfig;
    struct TBusSessionConfig;
    struct TBusHeader;
 
    class IThreadHandler;
 
    using TBusKey = ui64;
    using TBusMessageList = TList<TBusMessage*>;
    using TBusKeyVec = TVector<std::pair<TBusKey, TBusKey>>;
 
    using TBusMessageQueuePtr = TIntrusivePtr<TBusMessageQueue>;
 
    class TBusModule;
 
    using TBusData = TString;
    using TBusService = const char*;
 
#define YBUS_KEYMIN TBusKey(0L)
#define YBUS_KEYMAX TBusKey(-1L)
#define YBUS_KEYLOCAL TBusKey(7L)
#define YBUS_KEYINVALID TBusKey(99999999L) 
 
    // Check that generated id is valid for remote message
    inline bool IsBusKeyValid(TBusKey key) {
        return key != YBUS_KEYINVALID && key != YBUS_KEYMAX && key > YBUS_KEYLOCAL;
    }

#define YBUS_VERSION 0
 
#define YBUS_INFINITE (1u << 30u)
 
#define YBUS_STATUS_BASIC 0x0000
#define YBUS_STATUS_CONNS 0x0001
#define YBUS_STATUS_INFLIGHT 0x0002 
 
}