From 8cbb55f3066f71f5a4328193414d4555c87e96be Mon Sep 17 00:00:00 2001
From: lichao <lichao@aiotlink.com>
Date: 星期二, 30 三月 2021 11:41:30 +0800
Subject: [PATCH] refactor.
---
src/shm.h | 114 ++++++++++++---------------------------------------------
1 files changed, 24 insertions(+), 90 deletions(-)
diff --git a/src/shm.h b/src/shm.h
index 94ead7f..5e2c8b9 100644
--- a/src/shm.h
+++ b/src/shm.h
@@ -10,7 +10,7 @@
* Revision: none
* Compiler: gcc
*
- * Author: LiChao (),
+ * Author: Li Chao (),
* Organization:
*
* =====================================================================================
@@ -19,15 +19,17 @@
#ifndef SHM_6CHO6D6C
#define SHM_6CHO6D6C
-#include <boost/interprocess/managed_shared_memory.hpp>
-#include <boost/interprocess/sync/interprocess_condition.hpp>
-#include <boost/circular_buffer.hpp>
#include <boost/noncopyable.hpp>
-#include <boost/date_time/posix_time/posix_time.hpp>
+#include <boost/uuid/uuid.hpp>
+#include <boost/interprocess/managed_shared_memory.hpp>
+#include <boost/interprocess/sync/interprocess_mutex.hpp>
+#include <boost/interprocess/sync/interprocess_condition.hpp>
+#include <boost/interprocess/sync/scoped_lock.hpp>
namespace bhome_shm {
using namespace boost::interprocess;
+
typedef managed_shared_memory mshm_t;
typedef interprocess_mutex Mutex;
typedef scoped_lock<Mutex> Guard;
@@ -42,17 +44,21 @@
perm.set_unrestricted();
return perm;
}
+ void Swap(SharedMemory &a);
public:
static bool Remove(const std::string &name) {
return shared_memory_object::remove(name.c_str());
}
- SharedMemory(const std::string &name, const uint64_t size):
- mshm_t(open_or_create, name.c_str(), size, 0, AllowAll()),
- name_(name)
- {}
+ SharedMemory(const std::string &name, const uint64_t size);
+ ~SharedMemory();
std::string name() const { return name_; }
bool Remove() { return Remove(name()); }
- template <class T, class ...Params> T * New(Params const&...params) { return construct<T, std::nothrow>(anonymous_instance)(params...); }
+
+ void *Alloc(const size_t size) { return allocate(size, std::nothrow); }
+ void Dealloc(void *p) { if(p) { deallocate(p); } }
+ template<class T> void Dealloc(offset_ptr<T> ptr) { return Dealloc(ptr.get()); }
+
+ template <class T, class ...Params> T * New(Params const&...params) { return construct<T>(anonymous_instance, std::nothrow)(params...); }
template <class T> void Delete(T *p) { if (p) { destroy_ptr<T>(p); }; }
template <class T> void Delete(offset_ptr<T> p) { Delete(p.get()); }
@@ -60,9 +66,10 @@
// ShmObject manages an object in shared memory, but ShmObject itself is not in shared memory.
// works like a smart pointer of an object in shared memory.
+// TODO handshake with center, and can be removed if killed.
template <class T>
class ShmObject : private boost::noncopyable {
- static std::string DataName(const std::string &name) { return "dat" + name; }
+ static std::string ObjName(const std::string &name) { return "obj" + name; }
protected:
typedef T Data;
typedef SharedMemory ShmType;
@@ -73,101 +80,28 @@
bool IsOk() const { return pdata_; }
protected:
- ShmType &shm() { return shm_; }
+ ShmType &shm() const { return shm_; }
public:
template <class...Params>
ShmObject(ShmType &segment, const std::string &name, Params&&...t):
shm_(segment), name_(name)
{
- pdata_ = shm_.find_or_construct<Data>(DataName(name_).c_str())(t...);
+ pdata_ = shm_.find_or_construct<Data>(ObjName(name_).c_str(), std::nothrow)(t...);
if (!IsOk()) {
- throw("shm error: " + name_);
+ throw("Error: Not enough memory, can not allocate \"" + name_ + "\"");
}
}
- Data *find(const std::string &name) { return shm_.find<Data>(DataName(name).c_str()).first; }
+ Data *find(const std::string &name) { return shm_.find<Data>(ObjName(name).c_str()).first; }
virtual ~ShmObject() {}
std::string name() const { return name_; }
Data* data() { return pdata_; }
const Data* data() const { return pdata_; }
Data* operator->() { return data(); }
const Data* operator->() const { return data(); }
- virtual bool Remove() { return shm_.destroy<Data>(DataName(name_).c_str()); }
+ bool Remove() { return shm_.destroy<Data>(ObjName(name_).c_str()); }
};
-template <class D> using Allocator = allocator<D, mshm_t::segment_manager>;
-
-template <class D> using Circular = boost::circular_buffer<D, Allocator<D> >;
-
-typedef int MQId;
-template <class D>
-class SyncedQueue : private Circular<D>
-{
- typedef Circular<D> Super;
- Mutex mutex_;
- Cond cond_read_;
- Cond cond_write_;
- Mutex & mutex() { return mutex_; }
- const MQId id_;
-
- 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:
- template <class...T> SyncedQueue(MQId id, T&&...t):Super(t...), id_(id) {}
- using Super::size;
- using Super::capacity;
- MQId id() const { return id_; }
- bool Write(D buf, const int timeout_ms) {
- Guard lock(mutex());
- if (cond_write_.timed_wait(lock, MSFromNow(timeout_ms), [&]() { return !this->full(); })) {
- this->push_back(buf);
- cond_read_.notify_one();
- return true;
- } else {
- return false;
- }
- }
-
- bool Read(D &buf, const int timeout_ms){
- Guard lock(mutex());
- if (cond_read_.timed_wait(lock, MSFromNow(timeout_ms), [&]() { return !this->empty(); })) {
- buf = this->front();
- this->pop_front();
- cond_write_.notify_one();
- return true;
- } else {
- return false;
- }
- }
-};
-
-// safe to be stored in shared memory.
-struct Msg {
- MQId src_;
- offset_ptr<void> data_;
- size_t size_;
-};
-
-
-class ShmMsgQueue : private ShmObject<SyncedQueue<Msg> >
-{
- typedef ShmObject<SyncedQueue<Msg> > SharedQueue;
- typedef SharedQueue::Data Queue;
- ShmMsgQueue(MQId id, ShmType &segment, const std::string &name, const uint32_t len);
- bool Write(const Msg &buf, const int timeout_ms) { return data()->Write(buf, timeout_ms); }
- bool Read(Msg &buf, const int timeout_ms) { return data()->Read(buf, timeout_ms); }
-public:
- ShmMsgQueue(MQId id, ShmType &segment, const uint32_t len);
- ~ShmMsgQueue();
- bool Send(MQId remote_id, const void *data, const size_t size, const int timeout_ms);
- bool Recv(MQId &source_id, void *&data, size_t &size, const int timeout_ms);
- using SharedQueue::Remove;
- MQId id() const { return data()->id(); }
-};
+template <class D> using Allocator = allocator<D, SharedMemory::segment_manager>;
} // namespace bhome_shm
--
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