/*
 * =====================================================================================
 *
 *       Filename:  defs.h
 *
 *    Description:  
 *
 *        Version:  1.0
 *        Created:  2021年03月26日 19时26分17秒
 *       Revision:  none
 *       Compiler:  gcc
 *
 *         Author:  Li Chao (), 
 *   Organization:  
 *
 * =====================================================================================
 */

#ifndef DEFS_KP8LKGD0
#define DEFS_KP8LKGD0

#include "robust.h"
#include <atomic>
#include <string>

class ShmSocket;
typedef uint64_t MQId;

int64_t CalcAllocIndex(int64_t size);
int64_t GetAllocSize(int index);

struct MQInfo {
	MQId id_ = 0;
	int64_t offset_ = 0;
};

struct CenterInfo {
	MQInfo mq_center_;
	MQInfo mq_bus_;
	MQInfo mq_sender_;
	robust::AtomicReqRep init_rr_;
};

const int kBHCenterPort = 24287;
const char kTopicSep = '.';
namespace bhome_shm
{
class SharedMemory;
} // namespace bhome_shm

using bhome_shm::SharedMemory;

std::string BHomeShmName();
SharedMemory &BHomeShm();
CenterInfo *GetCenterInfo(SharedMemory &shm);
ShmSocket &DefaultSender(SharedMemory &shm);

MQId NewSession();
bool CenterInit();
bool GlobalInit(SharedMemory &shm);
typedef std::string Topic;
void SetLastError(const int ec, const std::string &msg);
void GetLastError(int &ec, std::string &msg);
//TODO center can check shm for previous crash.

const MQInfo &BHTopicCenterAddress(SharedMemory &shm);
const MQInfo &BHTopicBusAddress(SharedMemory &shm);
bool BHNodeInit(SharedMemory &shm, const int64_t request, int64_t &reply);
void BHCenterHandleInit(SharedMemory &shm, std::function<int64_t(const int64_t)> const &onReq);

// node mq is avail with in timeout; after that may get killed.
int NodeTimeoutSec();

std::string BHLogDir();

#endif // end of include guard: DEFS_KP8LKGD0