mirror of
https://github.com/libevent/libevent.git
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111 lines
3.1 KiB
C
111 lines
3.1 KiB
C
/*
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* Copyright (c) 2009 Niels Provos, Nick Mathewson
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <windows.h>
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#include <process.h>
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#include "event2/util.h"
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#include "util-internal.h"
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#include "iocp-internal.h"
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#include "log-internal.h"
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#include "mm-internal.h"
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void
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event_overlapped_init(struct event_overlapped *o, iocp_callback cb)
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{
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memset(o, 0, sizeof(struct event_overlapped));
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o->cb = cb;
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}
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static void
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handle_entry(OVERLAPPED *o, ULONG_PTR completion_key, DWORD nBytes)
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{
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struct event_overlapped *eo =
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EVUTIL_UPCAST(o, struct event_overlapped, overlapped);
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eo->cb(eo, completion_key, nBytes);
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}
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static void
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loop(void *_port)
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{
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struct event_iocp_port *port = _port;
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OVERLAPPED *overlapped;
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ULONG_PTR key;
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DWORD bytes;
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long ms = port->ms;
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if (ms <= 0)
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ms = INFINITE;
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while (GetQueuedCompletionStatus(port->port, &bytes, &key,
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&overlapped, ms)) {
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if (port->shutdown)
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return;
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handle_entry(overlapped, key, bytes);
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}
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event_warnx("GetQueuedCompletionStatus exited with no event.");
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}
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int
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event_iocp_port_associate(struct event_iocp_port *port, evutil_socket_t fd,
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uintptr_t key)
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{
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HANDLE h;
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h = CreateIoCompletionPort((HANDLE)fd, port->port, key, port->n_threads);
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if (!h)
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return -1;
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return 0;
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}
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struct event_iocp_port *
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event_iocp_port_launch(void)
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{
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struct event_iocp_port *port;
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int thread, i;
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if (!(port = mm_calloc(1, sizeof(struct event_iocp_port))))
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return NULL;
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port->n_threads = 2;
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port->port = CreateIoCompletionPort(NULL, NULL, 0, port->n_threads);
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port->ms = -1;
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if (!port->port)
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mm_free(port);
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for (i=0; i<port->n_threads; ++i)
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thread = _beginthread(loop, 0, port);
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return port;
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}
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void
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event_iocp_shutdown(struct event_iocp_port *port)
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{
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port->shutdown = 1;
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/* XXX notify. */
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}
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