/*
* Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014
* Jonathan Schleifer <js@webkeks.org>
*
* All rights reserved.
*
* This file is part of ObjFW. It may be distributed under the terms of the
* Q Public License 1.0, which can be found in the file LICENSE.QPL included in
* the packaging of this file.
*
* Alternatively, it may be distributed under the terms of the GNU General
* Public License, either version 2 or 3, which can be found in the file
* LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
* file.
*/
#define __NO_EXT_QNX
#include "config.h"
#ifdef HAVE_POLL_H
# include <poll.h>
#endif
#import "OFKernelEventObserver.h"
#import "OFKernelEventObserver+Private.h"
#import "OFKernelEventObserver_poll.h"
#import "OFDataArray.h"
#import "OFOutOfRangeException.h"
#import "socket_helpers.h"
#ifdef __wii__
# define pollfd pollsd
# define fd socket
#endif
@implementation OFKernelEventObserver_poll
- init
{
self = [super init];
@try {
struct pollfd p = { 0, POLLIN, 0 };
_FDs = [[OFDataArray alloc] initWithItemSize:
sizeof(struct pollfd)];
p.fd = _cancelFD[0];
[_FDs addItem: &p];
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
- (void)dealloc
{
[_FDs release];
[super dealloc];
}
- (void)OF_addFileDescriptor: (int)fd
withEvents: (short)events
{
struct pollfd *FDs = [_FDs items];
size_t i, count = [_FDs count];
bool found = false;
for (i = 0; i < count; i++) {
if (FDs[i].fd == fd) {
FDs[i].events |= events;
found = true;
break;
}
}
if (!found) {
struct pollfd p = { fd, events, 0 };
[_FDs addItem: &p];
}
}
- (void)OF_removeFileDescriptor: (int)fd
withEvents: (short)events
{
struct pollfd *FDs = [_FDs items];
size_t i, nFDs = [_FDs count];
for (i = 0; i < nFDs; i++) {
if (FDs[i].fd == fd) {
FDs[i].events &= ~events;
if (FDs[i].events == 0)
[_FDs removeItemAtIndex: i];
break;
}
}
}
- (void)OF_addFileDescriptorForReading: (int)fd
{
[self OF_addFileDescriptor: fd
withEvents: POLLIN];
}
- (void)OF_addFileDescriptorForWriting: (int)fd
{
[self OF_addFileDescriptor: fd
withEvents: POLLOUT];
}
- (void)OF_removeFileDescriptorForReading: (int)fd
{
[self OF_removeFileDescriptor: fd
withEvents: POLLIN];
}
- (void)OF_removeFileDescriptorForWriting: (int)fd
{
[self OF_removeFileDescriptor: fd
withEvents: POLLOUT];
}
- (bool)observeForTimeInterval: (of_time_interval_t)timeInterval
{
void *pool = objc_autoreleasePoolPush();
struct pollfd *FDs;
size_t i, nFDs, realEvents = 0;
[self OF_processQueueAndStoreRemovedIn: nil];
if ([self OF_processCache]) {
objc_autoreleasePoolPop(pool);
return true;
}
objc_autoreleasePoolPop(pool);
FDs = [_FDs items];
nFDs = [_FDs count];
#ifdef OPEN_MAX
if (nFDs > OPEN_MAX)
@throw [OFOutOfRangeException exception];
#endif
if (poll(FDs, (nfds_t)nFDs,
(int)(timeInterval != -1 ? timeInterval * 1000 : -1)) < 1)
return false;
for (i = 0; i < nFDs; i++) {
pool = objc_autoreleasePoolPush();
if (FDs[i].revents & POLLIN) {
if (FDs[i].fd == _cancelFD[0]) {
char buffer;
OF_ENSURE(read(_cancelFD[0], &buffer, 1) > 0);
FDs[i].revents = 0;
objc_autoreleasePoolPop(pool);
continue;
}
if ([_delegate respondsToSelector:
@selector(objectIsReadyForReading:)])
[_delegate objectIsReadyForReading:
_FDToObject[FDs[i].fd]];
realEvents++;
}
if (FDs[i].revents & POLLOUT) {
if ([_delegate respondsToSelector:
@selector(objectIsReadyForWriting:)])
[_delegate objectIsReadyForWriting:
_FDToObject[FDs[i].fd]];
realEvents++;
}
FDs[i].revents = 0;
objc_autoreleasePoolPop(pool);
}
if (realEvents == 0)
return false;
return true;
}
@end