| | |
| | | #ifndef SHM_6CHO6D6C |
| | | #define SHM_6CHO6D6C |
| | | |
| | | #include <boost/interprocess/managed_shared_memory.hpp> |
| | | #include <boost/interprocess/sync/interprocess_condition.hpp> |
| | | #include <boost/interprocess/containers/string.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 "msg.h" |
| | | #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; |
| | |
| | | {} |
| | | 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...); } |
| | | 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()); } |
| | | |
| | |
| | | // works like a smart pointer of an object in shared memory. |
| | | 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; |
| | |
| | | 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_); |
| | | } |
| | | } |
| | | 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()); } |
| | | virtual 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 boost::uuids::uuid 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(const MQId &id, T&&...t):Super(t...), id_(id) {} |
| | | SyncedQueue(const MQId &id, const uint32_t len, Allocator<D> const& alloc):Super(len, alloc), id_(id) {} |
| | | using Super::size; |
| | | using Super::capacity; |
| | | const 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; |
| | | } |
| | | } |
| | | }; |
| | | |
| | | class ShmMsgQueue : private ShmObject<SyncedQueue<Msg> > |
| | | { |
| | | typedef ShmObject<SyncedQueue<Msg> > SharedQueue; |
| | | typedef SharedQueue::Data Queue; |
| | | 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(const MQId &id, ShmType &segment, const uint32_t len); |
| | | ShmMsgQueue(ShmType &segment, const uint32_t len); |
| | | ~ShmMsgQueue(); |
| | | bool Send(const 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); |
| | | const MQId &Id() const { return data()->Id(); } |
| | | }; |
| | | template <class D> using Allocator = allocator<D, SharedMemory::segment_manager>; |
| | | |
| | | } // namespace bhome_shm |
| | | |