From a6f67b4249525089fb97eb9418c7014f66c2a000 Mon Sep 17 00:00:00 2001
From: lichao <lichao@aiotlink.com>
Date: 星期三, 28 四月 2021 19:29:17 +0800
Subject: [PATCH] use new robust mutex, circurar; rm timeout mutex.
---
src/shm_queue.h | 131 ++++++++++++++++---------------------------
1 files changed, 48 insertions(+), 83 deletions(-)
diff --git a/src/shm_queue.h b/src/shm_queue.h
index 5dbda96..11f9893 100644
--- a/src/shm_queue.h
+++ b/src/shm_queue.h
@@ -21,105 +21,70 @@
#include "shm.h"
#include <atomic>
-#include <boost/circular_buffer.hpp>
-#include <boost/date_time/posix_time/posix_time.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 : 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>
- bool ReadOnCond(D &buf, Pred const &pred)
- {
- auto Read = [&]() {
- Guard lock(this->mutex());
- if (pred(lock)) {
- using std::swap;
- swap(buf, Super::front());
- Super::pop_front();
- return true;
- } else {
- return false;
- }
- };
- return Read() ? (this->cond_write_.notify_one(), true) : false;
- }
-
- 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);
- Super::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) {}
-
- 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) {});
+ Guard lock(mutex());
+ if (!queue_.full()) {
+ onWrite(d);
+ queue_.push_back(d);
+ return true;
+ } else {
+ return false;
+ }
}
- 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 TryWrite(const D &d)
+ {
+ Guard lock(mutex());
+ return !queue_.full() ? (queue_.push_back(d), true) : false;
+ }
- bool Read(D &buf, const int timeout_ms) { return ReadOnCond(buf, TimedReadPred(timeout_ms)); }
- bool TryRead(D &buf) { return ReadOnCond(buf, TryReadPred()); }
+ 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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