/*
|
* =====================================================================================
|
*
|
* Filename: shm.cpp
|
*
|
* Description:
|
*
|
* Version: 1.0
|
* Created: 2021年03月22日 16时19分36秒
|
* Revision: none
|
* Compiler: gcc
|
*
|
* Author: Li Chao (),
|
* Organization:
|
*
|
* =====================================================================================
|
*/
|
|
#include "shm.h"
|
#include "bh_util.h"
|
#include <mutex>
|
#include <boost/uuid/uuid_io.hpp>
|
#include <boost/uuid/uuid_generators.hpp>
|
|
namespace bhome_shm {
|
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()(); }
|
}
|
|
ShmMsgQueue::ShmMsgQueue(const MQId &id, ShmType &segment, const uint32_t len):
|
SharedQueue(segment, MsgQIdToName(id), id, len, segment.get_segment_manager())
|
{
|
printf("queue size: %ld cap: %ld\n", data()->size(), data()->capacity());
|
}
|
|
ShmMsgQueue::ShmMsgQueue(ShmType &segment, const uint32_t len):ShmMsgQueue(NewId(), segment, len)
|
{}
|
|
ShmMsgQueue::~ShmMsgQueue()
|
{
|
Remove();
|
}
|
|
bool ShmMsgQueue::Send(const MQId &remote_id, const void *data, const size_t size, const int timeout_ms)
|
{
|
if (data && size) {
|
Queue *remote = find(MsgQIdToName(remote_id));
|
if (remote) {
|
void *p = shm().allocate(sizeof(MsgMetaV1) + size, std::nothrow);
|
bool r = false;
|
if (p) {
|
MsgMetaV1 meta;
|
meta.data_size_ = size;
|
memcpy(meta.src_id_, &Id(), sizeof(MQId));
|
meta.Pack(p);
|
|
memcpy(static_cast<char*>(p) + sizeof(meta), data, size);
|
if (remote->Write(p, timeout_ms)) {
|
return true;
|
} else {
|
shm().deallocate(p);
|
}
|
}
|
}
|
}
|
return false;
|
}
|
|
bool ShmMsgQueue::Recv(MQId &source_id, void *&data, size_t &size, const int timeout_ms)
|
{
|
Msg msg;
|
if (Read(msg, timeout_ms) && msg) {
|
DEFER1(shm().deallocate(msg.get()););
|
MsgMetaV1 meta;
|
meta.Parse(msg.get());
|
memcpy(&source_id, meta.src_id_, sizeof(MQId));
|
size = meta.data_size_;
|
if (data = malloc(size)) {
|
memcpy(data, static_cast<char*>(msg.get()) + meta.self_size_, size);
|
return true;
|
}
|
}
|
source_id = EmptyId();
|
data = 0;
|
size = 0;
|
return false;
|
}
|
|
} // namespace bhome_shm
|
