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#import "OFKernelEventObserver.h"
#import "OFInitializationFailedException.h"
#import "OFObserveFailedException.h"
#import "OFOutOfRangeException.h"
#import "socket_helpers.h"
#ifdef OF_AMIGAOS
# include <proto/exec.h>
#endif
@implementation OFSelectKernelEventObserver
- (instancetype)init
{
self = [super init];
#ifdef OF_AMIGAOS
_maxFD = 0;
#else
#ifndef OF_WINDOWS
# ifndef OF_WINDOWS
if (_cancelFD[0] >= (int)FD_SETSIZE)
@throw [OFInitializationFailedException
exceptionWithClass: self.class];
#endif
# endif
FD_ZERO(&_readFDs);
FD_ZERO(&_writeFDs);
FD_SET(_cancelFD[0], &_readFDs);
if (_cancelFD[0] > INT_MAX)
@throw [OFOutOfRangeException exception];
_maxFD = (int)_cancelFD[0];
#endif
return self;
}
- (void)of_addObjectForReading: (id <OFReadyForReadingObserving>)object
{
int fd = object.fileDescriptorForReading;
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{
id const *objects;
fd_set readFDs;
fd_set writeFDs;
struct timeval timeout;
int events;
#ifdef OF_AMIGAOS
ULONG execSignalMask;
ULONG execSignalMask, cancelSignal;
#endif
size_t count;
[self of_processQueue];
if ([self of_processReadBuffers])
return;
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timeout.tv_sec = (time_t)timeInterval;
#else
timeout.tv_sec = (long)timeInterval;
#endif
timeout.tv_usec = (int)lrint((timeInterval - timeout.tv_sec) * 1000);
#ifdef OF_AMIGAOS
if ((cancelSignal = AllocSignal(-1)) == (ULONG)-1)
@throw [OFObserveFailedException exceptionWithObserver: self
errNo: EAGAIN];
execSignalMask = _execSignalMask;
execSignalMask = _execSignalMask | (1 << cancelSignal);
Forbid();
_waitingTask = FindTask(NULL);
_cancelSignal = cancelSignal;
events = WaitSelect(_maxFD + 1, &readFDs, &writeFDs, NULL,
(void *)(timeInterval != -1 ? &timeout : NULL), &execSignalMask);
execSignalMask &= ~(1 << cancelSignal);
_waitingTask = NULL;
FreeSignal(_cancelSignal);
Permit();
#else
events = select(_maxFD + 1, &readFDs, &writeFDs, NULL,
(timeInterval != -1 ? &timeout : NULL));
#endif
if (events < 0)
@throw [OFObserveFailedException exceptionWithObserver: self
errNo: errno];
#ifdef OF_AMIGAOS
if (execSignalMask != 0 &&
[_delegate respondsToSelector: @selector(execSignalWasReceived:)])
[_delegate execSignalWasReceived: execSignalMask];
#endif
#else
#ifdef OF_HAVE_PIPE
# ifdef OF_HAVE_PIPE
OF_ENSURE(read(_cancelFD[0], &buffer, 1) == 1);
#else
# else
OF_ENSURE(recvfrom(_cancelFD[0], (void *)&buffer, 1, 0, NULL,
NULL) == 1);
#endif
# endif
}
#endif
objects = _readObjects.objects;
count = _readObjects.count;
for (size_t i = 0; i < count; i++) {
void *pool = objc_autoreleasePoolPush();
int fd = [objects[i] fileDescriptorForReading];
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