/*
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* =====================================================================================
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*
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* Filename: shm.cpp
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*
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* Description:
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*
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* Version: 1.0
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* Created: 2021年03月22日 16时19分36秒
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* Revision: none
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* Compiler: gcc
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*
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* Author: YOUR NAME (),
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* Organization:
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*
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* =====================================================================================
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*/
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#include "shm.h"
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#include "bh_util.h"
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#include <mutex>
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#include <boost/uuid/uuid_io.hpp>
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#include <boost/uuid/uuid_generators.hpp>
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namespace bhome_shm {
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using namespace boost::interprocess;
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using namespace boost::uuids;
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namespace {
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std::string MsgQIdToName(const MQId& id) { return "shmq" + to_string(id); }
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MQId EmptyId() { return nil_uuid(); }
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MQId NewId() { return random_generator()(); }
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}
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ShmMsgQueue::ShmMsgQueue(MQId id, ShmType &segment, const uint32_t len):
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SharedQueue(segment, MsgQIdToName(id), id, len, segment.get_segment_manager())
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{
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printf("queue size: %ld cap: %ld\n", data()->size(), data()->capacity());
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}
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ShmMsgQueue::ShmMsgQueue(ShmType &segment, const uint32_t len):ShmMsgQueue(NewId(), segment, len) {}
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ShmMsgQueue::~ShmMsgQueue()
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{
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Remove();
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}
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bool ShmMsgQueue::Send(MQId remote_id, const void *data, const size_t size, const int timeout_ms)
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{
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if (data && size) {
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Queue *remote = find(MsgQIdToName(remote_id));
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if (remote) {
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void *p = shm().allocate(size, std::nothrow);
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bool r = false;
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if (p) {
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Msg buf = { Id(), p, size};
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memcpy(p, data, size);
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if (remote->Write(buf, timeout_ms)) {
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return true;
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} else {
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shm().deallocate(p);
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}
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}
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}
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}
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return false;
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}
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bool ShmMsgQueue::Recv(MQId &source_id, void *&data, size_t &size, const int timeout_ms)
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{
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Msg buf;
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if (Read(buf, timeout_ms) && buf.size_ > 0) {
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DEFER1(shm().deallocate(buf.data_.get()););
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source_id = buf.src_;
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size = buf.size_;
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if (data = malloc(size)) {
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memcpy(data, buf.data_.get(), size);
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return true;
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}
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}
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source_id = EmptyId();
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data = 0;
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size = 0;
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return false;
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}
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} // namespace bhome_shm
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