From 72bffb0807925a156b076b71f78c848a08d27b87 Mon Sep 17 00:00:00 2001
From: lichao <lichao@aiotlink.com>
Date: 星期四, 29 四月 2021 10:55:35 +0800
Subject: [PATCH] refactor mutex.
---
src/shm_queue.h | 192 +++++++++++------------------------------------
1 files changed, 46 insertions(+), 146 deletions(-)
diff --git a/src/shm_queue.h b/src/shm_queue.h
index 93d77df..11f9893 100644
--- a/src/shm_queue.h
+++ b/src/shm_queue.h
@@ -19,172 +19,72 @@
#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>
+#include <atomic>
+#include <chrono>
namespace bhome_shm
{
template <class D>
-using Circular = boost::circular_buffer<D, Allocator<D>>;
+using Circular = robust::CircularBuffer<D, Allocator<D>>;
-typedef boost::uuids::uuid MQId;
template <class D>
-class SharedQueue : private Circular<D>
+class SharedQueue
{
- 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);
- }
-
- auto TimedReadPred(const int timeout_ms)
- {
- auto endtime = MSFromNow(timeout_ms);
- return [this, endtime](Guard &lock) {
- return (cond_read_.timed_wait(lock, endtime, [&]() { return !this->empty(); }));
- };
- }
- auto TryReadPred()
- {
- return [this](Guard &lock) { return !this->empty(); };
- }
-
- template <class Pred, class OnData>
- int ReadAllOnCond(Pred const &pred, OnData const &onData)
- {
- Guard lock(this->mutex());
- int n = 0;
- while (pred(lock)) {
- ++n;
- onData(this->front());
- this->pop_front();
- this->cond_write_.notify_one();
- }
- return n;
- }
-
- template <class Pred>
- bool ReadOnCond(D &buf, Pred const &pred)
- {
- int flag = 0;
- auto only_once = [&](Guard &lock) { return flag++ == 0 && pred(lock); };
- auto onData = [&buf](D &d) {
- using std::swap;
- swap(buf, d);
- };
- return ReadAllOnCond(only_once, onData);
- }
-
- template <class Iter, class Pred, class OnWrite>
- int WriteAllOnCond(Iter begin, Iter end, Pred const &pred, OnWrite const &onWrite)
- {
- if (begin == end) { return 0; }
-
- int n = 0;
- Guard lock(mutex());
- while (pred(lock)) {
- onWrite(*begin);
- this->push_back(*begin);
- ++n;
- cond_read_.notify_one();
- if (++begin == end) {
- break;
- }
- }
- return n;
- }
-
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 TryWrite(Iter begin, Iter end, const OnWrite &onWrite)
- {
- auto tryWritePred = [this](Guard &lock) { return !this->full(); };
- return WriteAllOnCond(begin, end, tryWritePred, onWrite);
- }
+ queue_(len, alloc) {}
template <class OnWrite>
- bool TryWrite(const D &buf, const OnWrite &onWrite) { return TryWrite(&buf, (&buf) + 1, onWrite); }
-
- bool TryWrite(const D &buf)
+ bool TryWrite(const D &d, const OnWrite &onWrite)
{
- return TryWrite(buf, [](const D &buf) {});
- }
-
- template <class OnData>
- int ReadAll(const int timeout_ms, OnData const &onData) { return ReadAllOnCond(TimedReadPred(timeout_ms), onData); }
- template <class OnData>
- int TryReadAll(OnData const &onData) { return ReadAllOnCond(TryReadPred(), onData); }
-
- bool Read(D &buf, const int timeout_ms) { return ReadOnCond(buf, TimedReadPred(timeout_ms)); }
- bool TryRead(D &buf) { return ReadOnCond(buf, TryReadPred()); }
-};
-
-using namespace bhome_msg;
-
-class ShmMsgQueue : private ShmObject<SharedQueue<MsgI>>
-{
- typedef ShmObject<SharedQueue<MsgI>> Super;
- typedef Super::Data Queue;
- typedef std::function<void()> OnSend;
- 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();
- static bool Remove(SharedMemory &shm, const MQId &id);
- const MQId &Id() const { return id_; }
- using Super::shm;
-
- bool Recv(MsgI &msg, const int timeout_ms) { return data()->Read(msg, timeout_ms); }
- bool TryRecv(MsgI &msg) { return data()->TryRead(msg); }
- template <class OnData>
- int TryRecvAll(OnData const &onData) { return data()->TryReadAll(onData); }
- static Queue *Find(SharedMemory &shm, const MQId &remote_id);
- // static bool Send(SharedMemory &shm, const MQId &remote_id, const MsgI &msg, const int timeout_ms, OnSend const &onsend = OnSend());
- static bool TrySend(SharedMemory &shm, const MQId &remote_id, const MsgI &msg, OnSend const &onsend = OnSend());
- template <class Iter>
- static int TrySendAll(SharedMemory &shm, const MQId &remote_id, const Iter begin, const Iter end, OnSend const &onsend = OnSend())
- {
- Queue *remote = Find(shm, remote_id);
- if (remote) {
- if (onsend) {
- return remote->TryWrite(begin, end, [&onsend](const MsgI &msg) { onsend(); msg.AddRef(); });
- } else {
- return remote->TryWrite(begin, end, [](const MsgI &msg) { msg.AddRef(); });
- }
+ Guard lock(mutex());
+ if (!queue_.full()) {
+ onWrite(d);
+ queue_.push_back(d);
+ return true;
} else {
- // SetLestError(eNotFound);
- return 0;
+ return false;
}
}
- // template <class... Rest>
- // bool Send(const MQId &remote_id, Rest const &...rest) { return Send(shm(), remote_id, rest...); }
- template <class... Rest>
- bool TrySend(const MQId &remote_id, Rest const &...rest) { return TrySend(shm(), remote_id, rest...); }
- template <class... Rest>
- int TrySendAll(const MQId &remote_id, Rest const &...rest) { return TrySendAll(shm(), remote_id, rest...); }
+ bool TryWrite(const D &d)
+ {
+ Guard lock(mutex());
+ return !queue_.full() ? (queue_.push_back(d), true) : false;
+ }
- size_t Pending() const { return data()->size(); }
+ 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)
+ {
+ Guard lock(mutex());
+ if (!queue_.empty()) {
+ queue_.pop_front(d);
+ return true;
+ } else {
+ return false;
+ }
+ }
+
+private:
+ typedef Circular<D> Queue;
+ Queue queue_;
+ Mutex mutex_;
+ Mutex &mutex() { return mutex_; }
};
} // namespace bhome_shm
--
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