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-rw-r--r--src/ctx.hpp121
1 files changed, 54 insertions, 67 deletions
diff --git a/src/ctx.hpp b/src/ctx.hpp
index c96a923..0f2dd52 100644
--- a/src/ctx.hpp
+++ b/src/ctx.hpp
@@ -4,29 +4,32 @@
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 terms of the GNU Lesser 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.
+ GNU Lesser General Public License for more details.
- You should have received a copy of the Lesser GNU General Public License
+ You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __ZMQ_CTX_HPP_INCLUDED__
#define __ZMQ_CTX_HPP_INCLUDED__
-#include <vector>
-#include <set>
#include <map>
+#include <vector>
#include <string>
-#include "signaler.hpp"
+#include "../include/zmq.h"
+
+#include "mailbox.hpp"
+#include "semaphore.hpp"
#include "ypipe.hpp"
+#include "array.hpp"
#include "config.hpp"
#include "mutex.hpp"
#include "stdint.hpp"
@@ -50,94 +53,73 @@ namespace zmq
// no more sockets open it'll cause all the infrastructure to be shut
// down. If there are open sockets still, the deallocation happens
// after the last one is closed.
- int term ();
+ int terminate ();
// Create a socket.
class socket_base_t *create_socket (int type_);
- // Destroy a socket.
- void destroy_socket ();
-
- // Called by app_thread_t when it has no more sockets. The function
- // should disassociate the object from the current OS thread.
- void no_sockets (class app_thread_t *thread_);
+ // Make socket a zombie.
+ void zombify_socket (socket_base_t *socket_);
// Send command to the destination thread.
- void send_command (uint32_t destination_, const command_t &command_);
-
- // Receive command from another thread.
- bool recv_command (uint32_t thread_slot_, command_t *command_,
- bool block_);
+ void send_command (uint32_t tid_, const command_t &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_);
-
- // All pipes are registered with the context so that even the
- // orphaned pipes can be deallocated on the terminal shutdown.
- void register_pipe (class pipe_t *pipe_);
- void unregister_pipe (class pipe_t *pipe_);
+ // Affinity specifies which I/O threads are eligible (0 = all).
+ // Returns NULL is no I/O thread is available.
+ class io_thread_t *choose_io_thread (uint64_t affinity_);
// Management of inproc endpoints.
int register_endpoint (const char *addr_, class socket_base_t *socket_);
void unregister_endpoints (class socket_base_t *socket_);
class socket_base_t *find_endpoint (const char *addr_);
+ // Logging.
+ void log (zmq_msg_t *msg_);
+
private:
~ctx_t ();
- struct app_thread_info_t
- {
- // If false, 0MQ application thread is free, there's no associated
- // OS thread.
- bool associated;
+ // Sockets belonging to this context.
+ typedef array_t <socket_base_t> sockets_t;
+ sockets_t sockets;
+
+ // List of sockets that were already closed but not yet deallocated.
+ // These sockets still have some pipes and I/O objects attached.
+ typedef std::vector <socket_base_t*> zombies_t;
+ zombies_t zombies;
- // ID of the associated OS thread. If 'associated' is false,
- // this field contains bogus data.
- thread_t::id_t tid;
+ // List of unused thread slots.
+ typedef std::vector <uint32_t> emtpy_slots_t;
+ emtpy_slots_t empty_slots;
- // Pointer to the 0MQ application thread object.
- class app_thread_t *app_thread;
- };
+ // If true, shutdown thread wants to be informed when there are no
+ // more open sockets. Do so by posting no_sockets_sync semaphore.
+ // Note that this variable is synchronised by slot_sync mutex.
+ bool no_sockets_notify;
- // Application threads.
- typedef std::vector <app_thread_info_t> app_threads_t;
- app_threads_t app_threads;
+ // Object used by zmq_term to wait while all the sockets are closed
+ // by different application threads.
+ semaphore_t no_sockets_sync;
- // Synchronisation of accesses to shared application thread data.
- mutex_t app_threads_sync;
+ // Synchronisation of accesses to global slot-related data:
+ // sockets, zombies, empty_slots, terminated. It also synchronises
+ // access to zombie sockets as such (as oposed to slots) and provides
+ // a memory barrier to ensure that all CPU cores see the same data.
+ mutex_t slot_sync;
+
+ // This function attempts to deallocate as many zombie sockets as
+ // possible. It must be called within a slot_sync critical section.
+ void dezombify ();
// I/O threads.
typedef std::vector <class io_thread_t*> io_threads_t;
io_threads_t io_threads;
- // Array of pointers to signalers for both application and I/O threads.
- int signalers_count;
- signaler_t **signalers;
-
- // As pipes may reside in orphaned state in particular moments
- // of the pipe shutdown process, i.e. neither pipe reader nor
- // pipe writer hold reference to the pipe, we have to hold references
- // to all pipes in context so that we can deallocate them
- // during terminal shutdown even though it conincides with the
- // pipe being in the orphaned state.
- typedef std::set <class pipe_t*> pipes_t;
- pipes_t pipes;
-
- // Synchronisation of access to the pipes repository.
- mutex_t pipes_sync;
-
- // Number of sockets alive.
- int sockets;
-
- // If true, zmq_term was already called. When last socket is closed
- // the whole 0MQ infrastructure should be deallocated.
- bool terminated;
-
- // Synchronisation of access to the termination data (socket count
- // and 'terminated' flag).
- mutex_t term_sync;
+ // Array of pointers to mailboxes for both application and I/O threads.
+ uint32_t slot_count;
+ mailbox_t **slots;
// List of inproc endpoints within this context.
typedef std::map <std::string, class socket_base_t*> endpoints_t;
@@ -146,6 +128,11 @@ namespace zmq
// Synchronisation of access to the list of inproc endpoints.
mutex_t endpoints_sync;
+ // PUB socket for logging. The socket is shared among all the threads,
+ // thus it is synchronised by a mutex.
+ class socket_base_t *log_socket;
+ mutex_t log_sync;
+
ctx_t (const ctx_t&);
void operator = (const ctx_t&);
};