summaryrefslogtreecommitdiffstats
path: root/external_libs/python/pyzmq-14.7.0/bundled/zeromq/src/encoder.hpp
diff options
context:
space:
mode:
authorDan Klein <danklei@cisco.com>2015-08-24 13:22:48 +0300
committerDan Klein <danklei@cisco.com>2015-08-24 13:22:48 +0300
commitdab741a80699f86e86c91718872a052cca9bbb25 (patch)
tree1959c4a2cea440170a5113dcb067796cb20ffb64 /external_libs/python/pyzmq-14.7.0/bundled/zeromq/src/encoder.hpp
parentd3f26ece7d4383df0b22fe9c3cb3e695381ec737 (diff)
Fixed dependencies of Control Plane to use external_lib sources
Diffstat (limited to 'external_libs/python/pyzmq-14.7.0/bundled/zeromq/src/encoder.hpp')
-rw-r--r--external_libs/python/pyzmq-14.7.0/bundled/zeromq/src/encoder.hpp185
1 files changed, 185 insertions, 0 deletions
diff --git a/external_libs/python/pyzmq-14.7.0/bundled/zeromq/src/encoder.hpp b/external_libs/python/pyzmq-14.7.0/bundled/zeromq/src/encoder.hpp
new file mode 100644
index 00000000..8d8a0ff5
--- /dev/null
+++ b/external_libs/python/pyzmq-14.7.0/bundled/zeromq/src/encoder.hpp
@@ -0,0 +1,185 @@
+/*
+ Copyright (c) 2007-2015 Contributors as noted in the AUTHORS file
+
+ This file is part of libzmq, the ZeroMQ core engine in C++.
+
+ libzmq is free software; you can redistribute it and/or modify it under
+ the terms of the GNU Lesser General Public License (LGPL) as published
+ by the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ As a special exception, the Contributors give you permission to link
+ this library with independent modules to produce an executable,
+ regardless of the license terms of these independent modules, and to
+ copy and distribute the resulting executable under terms of your choice,
+ provided that you also meet, for each linked independent module, the
+ terms and conditions of the license of that module. An independent
+ module is a module which is not derived from or based on this library.
+ If you modify this library, you must extend this exception to your
+ version of the library.
+
+ libzmq 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 GNU Lesser General Public
+ License for more details.
+
+ 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_ENCODER_HPP_INCLUDED__
+#define __ZMQ_ENCODER_HPP_INCLUDED__
+
+#if defined(_MSC_VER)
+#ifndef NOMINMAX
+#define NOMINMAX
+#endif
+#endif
+
+#include <stddef.h>
+#include <string.h>
+#include <stdlib.h>
+#include <algorithm>
+
+#include "err.hpp"
+#include "msg.hpp"
+#include "i_encoder.hpp"
+
+namespace zmq
+{
+
+ // Helper base class for encoders. It implements the state machine that
+ // fills the outgoing buffer. Derived classes should implement individual
+ // state machine actions.
+
+ template <typename T> class encoder_base_t : public i_encoder
+ {
+ public:
+
+ inline encoder_base_t (size_t bufsize_) :
+ bufsize (bufsize_),
+ in_progress (NULL)
+ {
+ buf = (unsigned char*) malloc (bufsize_);
+ alloc_assert (buf);
+ }
+
+ // The destructor doesn't have to be virtual. It is made virtual
+ // just to keep ICC and code checking tools from complaining.
+ inline virtual ~encoder_base_t ()
+ {
+ free (buf);
+ }
+
+ // The function returns a batch of binary data. The data
+ // are filled to a supplied buffer. If no buffer is supplied (data_
+ // points to NULL) decoder object will provide buffer of its own.
+ inline size_t encode (unsigned char **data_, size_t size_)
+ {
+ unsigned char *buffer = !*data_ ? buf : *data_;
+ size_t buffersize = !*data_ ? bufsize : size_;
+
+ if (in_progress == NULL)
+ return 0;
+
+ size_t pos = 0;
+ while (pos < buffersize) {
+
+ // If there are no more data to return, run the state machine.
+ // If there are still no data, return what we already have
+ // in the buffer.
+ if (!to_write) {
+ if (new_msg_flag) {
+ int rc = in_progress->close ();
+ errno_assert (rc == 0);
+ rc = in_progress->init ();
+ errno_assert (rc == 0);
+ in_progress = NULL;
+ break;
+ }
+ (static_cast <T*> (this)->*next) ();
+ }
+
+ // If there are no data in the buffer yet and we are able to
+ // fill whole buffer in a single go, let's use zero-copy.
+ // There's no disadvantage to it as we cannot stuck multiple
+ // messages into the buffer anyway. Note that subsequent
+ // write(s) are non-blocking, thus each single write writes
+ // at most SO_SNDBUF bytes at once not depending on how large
+ // is the chunk returned from here.
+ // As a consequence, large messages being sent won't block
+ // other engines running in the same I/O thread for excessive
+ // amounts of time.
+ if (!pos && !*data_ && to_write >= buffersize) {
+ *data_ = write_pos;
+ pos = to_write;
+ write_pos = NULL;
+ to_write = 0;
+ return pos;
+ }
+
+ // Copy data to the buffer. If the buffer is full, return.
+ size_t to_copy = std::min (to_write, buffersize - pos);
+ memcpy (buffer + pos, write_pos, to_copy);
+ pos += to_copy;
+ write_pos += to_copy;
+ to_write -= to_copy;
+ }
+
+ *data_ = buffer;
+ return pos;
+ }
+
+ void load_msg (msg_t *msg_)
+ {
+ zmq_assert (in_progress == NULL);
+ in_progress = msg_;
+ (static_cast <T*> (this)->*next) ();
+ }
+
+ protected:
+
+ // Prototype of state machine action.
+ typedef void (T::*step_t) ();
+
+ // This function should be called from derived class to write the data
+ // to the buffer and schedule next state machine action.
+ inline void next_step (void *write_pos_, size_t to_write_,
+ step_t next_, bool new_msg_flag_)
+ {
+ write_pos = (unsigned char*) write_pos_;
+ to_write = to_write_;
+ next = next_;
+ new_msg_flag = new_msg_flag_;
+ }
+
+ private:
+
+ // Where to get the data to write from.
+ unsigned char *write_pos;
+
+ // How much data to write before next step should be executed.
+ size_t to_write;
+
+ // Next step. If set to NULL, it means that associated data stream
+ // is dead.
+ step_t next;
+
+ bool new_msg_flag;
+
+ // The buffer for encoded data.
+ size_t bufsize;
+ unsigned char *buf;
+
+ encoder_base_t (const encoder_base_t&);
+ void operator = (const encoder_base_t&);
+
+ protected:
+
+ msg_t *in_progress;
+
+ };
+}
+
+#endif
+