/*
|
* =====================================================================================
|
*
|
* Filename: shm_queue.cpp
|
*
|
* Description:
|
*
|
* Version: 1.0
|
* Created: 2021年03月25日 10时34分42秒
|
* Revision: none
|
* Compiler: gcc
|
*
|
* Author: Li Chao (),
|
* Organization:
|
*
|
* =====================================================================================
|
*/
|
|
#include "shm_queue.h"
|
#include "bh_util.h"
|
#include <boost/uuid/uuid_generators.hpp>
|
#include <boost/uuid/uuid_io.hpp>
|
|
namespace bhome_shm
|
{
|
using namespace bhome_msg;
|
using namespace boost::interprocess;
|
using namespace boost::uuids;
|
|
namespace
|
{
|
std::string MsgQIdToName(const MQId &id) { return "shmq" + to_string(id); }
|
// MQId EmptyId() { return nil_uuid(); }
|
MQId NewId() { return random_generator()(); }
|
const int AdjustMQLength(const int len)
|
{
|
const int kMaxLength = 10000;
|
const int kDefaultLen = 12;
|
if (len <= 0) {
|
return kDefaultLen;
|
} else if (len < kMaxLength) {
|
return len;
|
} else {
|
return kMaxLength;
|
}
|
}
|
|
} // namespace
|
|
// ShmMsgQueue memory usage: (320 + 16*length) bytes, length >= 2
|
ShmMsgQueue::ShmMsgQueue(const MQId &id, ShmType &segment, const int len) :
|
Super(segment, MsgQIdToName(id), AdjustMQLength(len), segment.get_segment_manager()),
|
id_(id)
|
{
|
}
|
|
ShmMsgQueue::ShmMsgQueue(ShmType &segment, const int len) :
|
ShmMsgQueue(NewId(), segment, len)
|
{
|
}
|
|
ShmMsgQueue::~ShmMsgQueue()
|
{
|
Remove();
|
}
|
|
bool ShmMsgQueue::Send(SharedMemory &shm, const MQId &remote_id, const MsgI &msg, const int timeout_ms)
|
{
|
Queue *remote = Find(shm, MsgQIdToName(remote_id));
|
return remote && remote->Write(msg, timeout_ms, [](const MsgI &msg) { msg.AddRef(); });
|
}
|
|
// bool ShmMsgQueue::Send(const MQId &remote_id, const MsgI &msg, const int timeout_ms)
|
// {
|
// Queue *remote = Find(MsgQIdToName(remote_id));
|
// return remote && remote->Write(msg, timeout_ms, [](const MsgI&msg){msg.AddRef();});
|
// }
|
|
bool ShmMsgQueue::Send(const MQId &remote_id, const BHMsg &data, const int timeout_ms)
|
{
|
MsgI msg;
|
if (msg.Make(shm(), data)) {
|
if (Send(remote_id, msg, timeout_ms)) {
|
return true;
|
} else {
|
msg.Release(shm());
|
}
|
}
|
return false;
|
}
|
|
/*
|
bool ShmMsgQueue::Send(const MQId &remote_id, const void *data, const size_t size, const int timeout_ms)
|
{
|
// Test shows that in the 2 cases:
|
// 1) build msg first, then find remote queue;
|
// 2) find remote queue first, then build msg;
|
// 1 is about 50% faster than 2, maybe cache related.
|
|
MsgI msg;
|
if(msg.BuildRequest(shm(), Id(), data, size)) {
|
if(Send(remote_id, msg, timeout_ms)) {
|
return true;
|
} else {
|
msg.Release(shm());
|
}
|
}
|
return false;
|
}
|
//*/
|
bool ShmMsgQueue::Recv(BHMsg &msg, const int timeout_ms)
|
{
|
MsgI imsg;
|
if (Read(imsg, timeout_ms)) {
|
DEFER1(imsg.Release(shm()););
|
return imsg.Unpack(msg);
|
} else {
|
return false;
|
}
|
}
|
|
} // namespace bhome_shm
|