/*
* Copyright (c) 2008, 2009, 2010, 2011, 2012
* 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.
*/
#include "config.h"
#define __NO_EXT_QNX
#include <unistd.h>
#include <poll.h>
#import "OFStreamObserver_poll.h"
#import "OFDataArray.h"
#import "OFOutOfRangeException.h"
#import "autorelease.h"
#import "macros.h"
@implementation OFStreamObserver_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)_addFileDescriptor: (int)fd
withEvents: (short)events
{
struct pollfd *FDsCArray = [FDs cArray];
size_t i, count = [FDs count];
BOOL found = NO;
for (i = 0; i < count; i++) {
if (FDsCArray[i].fd == fd) {
FDsCArray[i].events |= events;
found = YES;
break;
}
}
if (!found) {
struct pollfd p = { fd, events | POLLERR, 0 };
[FDs addItem: &p];
}
}
- (void)_removeFileDescriptor: (int)fd
withEvents: (short)events
{
struct pollfd *FDsCArray = [FDs cArray];
size_t i, nFDs = [FDs count];
for (i = 0; i < nFDs; i++) {
if (FDsCArray[i].fd == fd) {
FDsCArray[i].events &= ~events;
if ((FDsCArray[i].events & ~POLLERR) == 0)
[FDs removeItemAtIndex: i];
break;
}
}
}
- (void)_addFileDescriptorForReading: (int)fd
{
[self _addFileDescriptor: fd
withEvents: POLLIN];
}
- (void)_addFileDescriptorForWriting: (int)fd
{
[self _addFileDescriptor: fd
withEvents: POLLOUT];
}
- (void)_removeFileDescriptorForReading: (int)fd
{
[self _removeFileDescriptor: fd
withEvents: POLLIN];
}
- (void)_removeFileDescriptorForWriting: (int)fd
{
[self _removeFileDescriptor: fd
withEvents: POLLOUT];
}
- (BOOL)observeWithTimeout: (double)timeout
{
void *pool = objc_autoreleasePoolPush();
struct pollfd *FDsCArray;
size_t i, nFDs, realEvents = 0;
[self _processQueue];
if ([self _processCache]) {
objc_autoreleasePoolPop(pool);
return YES;
}
objc_autoreleasePoolPop(pool);
FDsCArray = [FDs cArray];
nFDs = [FDs count];
#ifdef OPEN_MAX
if (nFDs > OPEN_MAX)
@throw [OFOutOfRangeException exceptionWithClass: [self class]];
#endif
if (poll(FDsCArray, (nfds_t)nFDs,
(timeout != -1 ? timeout * 1000 : -1)) < 1)
return NO;
for (i = 0; i < nFDs; i++) {
pool = objc_autoreleasePoolPush();
if (FDsCArray[i].revents & POLLIN) {
if (FDsCArray[i].fd == cancelFD[0]) {
char buffer;
OF_ENSURE(read(cancelFD[0], &buffer, 1) > 0);
FDsCArray[i].revents = 0;
objc_autoreleasePoolPop(pool);
continue;
}
realEvents++;
[delegate streamIsReadyForReading:
FDToStream[FDsCArray[i].fd]];
}
if (FDsCArray[i].revents & POLLOUT) {
realEvents++;
[delegate streamIsReadyForWriting:
FDToStream[FDsCArray[i].fd]];
}
if (FDsCArray[i].revents & POLLERR) {
realEvents++;
[delegate streamDidReceiveException:
FDToStream[FDsCArray[i].fd]];
}
FDsCArray[i].revents = 0;
objc_autoreleasePoolPop(pool);
}
if (realEvents == 0)
return NO;
return YES;
}
@end