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authorMartin Sustrik <sustrik@fastmq.commkdir>2009-08-08 16:01:58 +0200
committerMartin Sustrik <sustrik@fastmq.commkdir>2009-08-08 16:01:58 +0200
commita8b410e66c3c75809c8e9c01dd3e35c579f02347 (patch)
tree7af63906dce0216f86e5ff0767efaddfd6492cfd /src/context.hpp
parent0b5cc026fbe7ccc6de66907be29471562a2d344d (diff)
lockfree interaction patter for 3 theads implemented
Diffstat (limited to 'src/context.hpp')
-rw-r--r--src/context.hpp122
1 files changed, 0 insertions, 122 deletions
diff --git a/src/context.hpp b/src/context.hpp
deleted file mode 100644
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-/*
- Copyright (c) 2007-2009 FastMQ Inc.
-
- This file is part of 0MQ.
-
- 0MQ is free software; you can redistribute it and/or modify it under
- the terms of the Lesser GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
-
- 0MQ is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- Lesser GNU General Public License for more details.
-
- You should have received a copy of the Lesser GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#ifndef __ZMQ_CONTEXT_HPP_INCLUDED__
-#define __ZMQ_CONTEXT_HPP_INCLUDED__
-
-#include <vector>
-#include <map>
-#include <string>
-
-#include "i_signaler.hpp"
-#include "ypipe.hpp"
-#include "command.hpp"
-#include "config.hpp"
-#include "mutex.hpp"
-#include "stdint.hpp"
-
-namespace zmq
-{
-
- // Dispatcher implements bidirectional thread-safe passing of commands
- // between N threads. It consists of a ypipes to pass commands and
- // signalers to wake up the receiver thread when new commands are
- // available. Note that context is inefficient for passing messages
- // within a thread (sender thread = receiver thread). The optimisation is
- // not part of the class and should be implemented by individual threads
- // (presumably by calling the command handling function directly).
-
- class context_t
- {
- public:
-
- // Create the context object. Matrix of pipes to communicate between
- // each socket and each I/O thread is created along with appropriate
- // signalers.
- context_t (int app_threads_, int io_threads_);
-
- // To be called to terminate the whole infrastructure (zmq_term).
- ~context_t ();
-
- // Create a socket.
- struct i_api *create_socket (int type_);
-
- // Returns number of thread slots in the context. To be used by
- // individual threads to find out how many distinct signals can be
- // received.
- int thread_slot_count ();
-
- // Send command from the source to the destination.
- inline void write (int source_, int destination_,
- const command_t &command_)
- {
- command_pipe_t &pipe =
- command_pipes [source_ * signalers.size () + destination_];
- pipe.write (command_);
- if (!pipe.flush ())
- signalers [destination_]->signal (source_);
- }
-
- // Receive command from the source. Returns false if there is no
- // command available.
- inline bool read (int source_, int destination_, command_t *command_)
- {
- return command_pipes [source_ * signalers.size () +
- destination_].read (command_);
- }
-
- // Returns the I/O thread that is the least busy at the moment.
- // Taskset specifies which I/O threads are eligible (0 = all).
- class io_thread_t *choose_io_thread (uint64_t taskset_);
-
- private:
-
- // Returns the app thread associated with the current thread.
- // NULL if we are out of app thread slots.
- class app_thread_t *choose_app_thread ();
-
- // Application threads.
- typedef std::vector <class app_thread_t*> app_threads_t;
- app_threads_t app_threads;
-
- // I/O threads.
- typedef std::vector <class io_thread_t*> io_threads_t;
- io_threads_t io_threads;
-
- // Signalers for both application and I/O threads.
- std::vector <i_signaler*> signalers;
-
- // Pipe to hold the commands.
- typedef ypipe_t <command_t, true,
- command_pipe_granularity> command_pipe_t;
-
- // NxN matrix of command pipes.
- command_pipe_t *command_pipes;
-
- // Synchronisation of accesses to shared thread data.
- mutex_t threads_sync;
-
- context_t (const context_t&);
- void operator = (const context_t&);
- };
-
-}
-
-#endif
-