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Relicense permission collected from all relevant authors as tallied at: https://github.com/rlenferink/libzmq-relicense/blob/master/checklist.md The relicense grants are collected under RELICENSE/ and will be moved to the above repository in a later commit. Fixes https://github.com/zeromq/libzmq/issues/2376
84 lines
1.9 KiB
C++
84 lines
1.9 KiB
C++
/* SPDX-License-Identifier: MPL-2.0 */
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#ifndef __ZMQ_POLL_HPP_INCLUDED__
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#define __ZMQ_POLL_HPP_INCLUDED__
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// poller.hpp decides which polling mechanism to use.
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#include "poller.hpp"
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#if defined ZMQ_IOTHREAD_POLLER_USE_POLL
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#if defined ZMQ_HAVE_WINDOWS
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#error \
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"poll is broken on Windows for the purpose of the I/O thread poller, use select instead; "\
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"see https://github.com/zeromq/libzmq/issues/3107"
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#endif
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#include <poll.h>
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#include <stddef.h>
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#include <vector>
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#include "ctx.hpp"
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#include "fd.hpp"
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#include "thread.hpp"
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#include "poller_base.hpp"
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namespace zmq
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{
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struct i_poll_events;
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// Implements socket polling mechanism using the POSIX.1-2001
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// poll() system call.
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class poll_t ZMQ_FINAL : public worker_poller_base_t
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{
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public:
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typedef fd_t handle_t;
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poll_t (const thread_ctx_t &ctx_);
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~poll_t ();
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// "poller" concept.
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// These methods may only be called from an event callback; add_fd may also be called before start.
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handle_t add_fd (fd_t fd_, zmq::i_poll_events *events_);
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void rm_fd (handle_t handle_);
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void set_pollin (handle_t handle_);
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void reset_pollin (handle_t handle_);
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void set_pollout (handle_t handle_);
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void reset_pollout (handle_t handle_);
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void stop ();
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static int max_fds ();
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private:
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// Main event loop.
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void loop () ZMQ_FINAL;
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void cleanup_retired ();
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struct fd_entry_t
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{
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fd_t index;
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zmq::i_poll_events *events;
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};
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// This table stores data for registered descriptors.
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typedef std::vector<fd_entry_t> fd_table_t;
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fd_table_t fd_table;
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// Pollset to pass to the poll function.
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typedef std::vector<pollfd> pollset_t;
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pollset_t pollset;
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// If true, there's at least one retired event source.
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bool retired;
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ZMQ_NON_COPYABLE_NOR_MOVABLE (poll_t)
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};
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typedef poll_t poller_t;
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}
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#endif
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#endif
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