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