/*
|
* =====================================================================================
|
*
|
* 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 "robust.h"
|
#include "shm.h"
|
#include <atomic>
|
#include <boost/circular_buffer.hpp>
|
#include <chrono>
|
|
namespace bhome_shm
|
{
|
|
template <class D>
|
using Circular = boost::circular_buffer<D, Allocator<D>>;
|
// using Circular = robust::CircularBuffer<D, Allocator<D>>;
|
|
template <class D>
|
class SharedQueue
|
{
|
public:
|
SharedQueue(const uint32_t len, Allocator<D> const &alloc) :
|
queue_(len, alloc) {}
|
|
bool Read(D &d, const int timeout_ms)
|
{
|
using namespace std::chrono;
|
auto end_time = steady_clock::now() + milliseconds(timeout_ms);
|
do {
|
if (TryRead(d)) {
|
return true;
|
} else {
|
robust::QuickSleep();
|
}
|
} while (steady_clock::now() < end_time);
|
return false;
|
}
|
bool TryRead(D &d)
|
{
|
// bhome_shm::Guard lock(mutex_);
|
if (!queue_.empty()) {
|
d = queue_.front();
|
queue_.pop_front();
|
return true;
|
} else {
|
return false;
|
}
|
}
|
bool TryWrite(const D &d)
|
{
|
// bhome_shm::Guard lock(mutex_);
|
if (!queue_.full()) {
|
queue_.push_back(d);
|
return true;
|
} else {
|
return false;
|
}
|
}
|
|
private:
|
Circular<D> queue_;
|
// bhome_shm::Mutex mutex_;
|
};
|
|
template <int Power = 4>
|
class SharedQ63
|
{
|
public:
|
template <class... T>
|
explicit SharedQ63(T &&...t) {} // easy testing
|
|
typedef int64_t Data;
|
bool Read(Data &d, const int timeout_ms)
|
{
|
using namespace std::chrono;
|
auto end_time = steady_clock::now() + milliseconds(timeout_ms);
|
do {
|
for (int i = 0; i < 100; ++i) {
|
if (TryRead(d)) {
|
return true;
|
}
|
}
|
robust::QuickSleep();
|
} while (steady_clock::now() < end_time);
|
return false;
|
}
|
bool TryRead(Data &d, const bool try_more = true) { return queue_.pop(d, try_more); }
|
bool TryWrite(const Data d, const bool try_more = true) { return queue_.push(d, try_more); }
|
|
private:
|
robust::AtomicQueue<Power, Data> queue_;
|
};
|
|
} // namespace bhome_shm
|
|
#endif // end of include guard: SHM_QUEUE_JE0OEUP3
|
