/*
|
* =====================================================================================
|
*
|
* Filename: shm_queue.h
|
*
|
* Description:
|
*
|
* Version: 1.0
|
* Created: 2021年03月25日 10时35分09秒
|
* Revision: none
|
* Compiler: gcc
|
*
|
* Author: Li Chao (),
|
* Organization:
|
*
|
* =====================================================================================
|
*/
|
|
#ifndef SHM_QUEUE_JE0OEUP3
|
#define SHM_QUEUE_JE0OEUP3
|
|
#include "msg.h"
|
#include "shm.h"
|
#include <boost/circular_buffer.hpp>
|
#include <boost/date_time/posix_time/posix_time.hpp>
|
|
namespace bhome_shm
|
{
|
|
template <class D>
|
using Circular = boost::circular_buffer<D, Allocator<D>>;
|
|
typedef boost::uuids::uuid MQId;
|
|
template <class D>
|
class SharedQueue : private Circular<D>
|
{
|
typedef Circular<D> Super;
|
Mutex mutex_;
|
Cond cond_read_;
|
Cond cond_write_;
|
Mutex &mutex() { return mutex_; }
|
|
static boost::posix_time::ptime MSFromNow(const int ms)
|
{
|
using namespace boost::posix_time;
|
ptime cur = boost::posix_time::microsec_clock::universal_time();
|
return cur + millisec(ms);
|
}
|
|
public:
|
SharedQueue(const uint32_t len, Allocator<D> const &alloc) :
|
Super(len, alloc) {}
|
using Super::capacity;
|
using Super::size;
|
template <class Iter, class OnWrite>
|
int Write(Iter begin, Iter end, const int timeout_ms, const OnWrite &onWrite)
|
{
|
int n = 0;
|
if (begin != end) {
|
auto endtime = MSFromNow(timeout_ms);
|
Guard lock(mutex());
|
while (cond_write_.timed_wait(lock, endtime, [&]() { return !this->full(); })) {
|
onWrite(*begin);
|
this->push_back(*begin);
|
++n;
|
cond_read_.notify_one();
|
if (++begin == end) {
|
break;
|
}
|
}
|
}
|
return n;
|
}
|
|
template <class OnWrite>
|
bool Write(const D &buf, const int timeout_ms, const OnWrite &onWrite)
|
{
|
return Write(&buf, (&buf) + 1, timeout_ms, onWrite);
|
}
|
bool Write(const D &buf, const int timeout_ms)
|
{
|
return Write(buf, timeout_ms, [](const D &buf) {});
|
}
|
|
template <class OnData>
|
bool Read(const int timeout_ms, OnData onData)
|
{
|
int n = 0;
|
auto endtime = MSFromNow(timeout_ms);
|
Guard lock(mutex());
|
while (cond_read_.timed_wait(lock, endtime, [&]() { return !this->empty(); })) {
|
const bool more = onData(this->front());
|
this->pop_front();
|
cond_write_.notify_one();
|
++n;
|
if (!more) {
|
break;
|
}
|
}
|
return n;
|
}
|
|
bool Read(D &buf, const int timeout_ms)
|
{
|
auto read1 = [&](D &d) {
|
using std::swap;
|
swap(buf, d);
|
return false;
|
};
|
return Read(timeout_ms, read1) == 1;
|
}
|
};
|
|
using namespace bhome_msg;
|
|
class ShmMsgQueue : private ShmObject<SharedQueue<MsgI>>
|
{
|
typedef ShmObject<SharedQueue<MsgI>> Super;
|
typedef Super::Data Queue;
|
typedef std::function<void()> OnSend;
|
bool Write(const MsgI &buf, const int timeout_ms) { return data()->Write(buf, timeout_ms); }
|
bool Read(MsgI &buf, const int timeout_ms) { return data()->Read(buf, timeout_ms); }
|
MQId id_;
|
|
protected:
|
ShmMsgQueue(const std::string &raw_name, ShmType &segment, const int len); // internal use.
|
public:
|
ShmMsgQueue(const MQId &id, ShmType &segment, const int len);
|
ShmMsgQueue(ShmType &segment, const int len);
|
~ShmMsgQueue();
|
const MQId &Id() const { return id_; }
|
|
// bool Recv(MsgI &msg, BHMsgHead &head, const int timeout_ms);
|
bool Recv(MsgI &msg, const int timeout_ms) { return Read(msg, timeout_ms); }
|
static bool Send(SharedMemory &shm, const MQId &remote_id, const MsgI &msg, const int timeout_ms, OnSend const &onsend);
|
static bool Send(SharedMemory &shm, const MQId &remote_id, const MsgI &msg, const int timeout_ms);
|
|
template <class... Rest>
|
bool Send(const MQId &remote_id, Rest const &...rest) { return Send(shm(), remote_id, rest...); }
|
size_t Pending() const { return data()->size(); }
|
};
|
|
} // namespace bhome_shm
|
|
#endif // end of include guard: SHM_QUEUE_JE0OEUP3
|
