apple2ix/Apple2Mac/DDHidLib/lib/DDHidQueue.m

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/*
* Copyright (c) 2007 Dave Dribin
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#import "DDHidQueue.h"
#import "DDHidElement.h"
#import "DDHIdEvent.h"
#import "NSXReturnThrowError.h"
static void queueCallbackFunction(void* target, IOReturn result, void* refcon,
void* sender);
@interface DDHidQueue (Private)
- (void) handleQueueCallback;
@end
@implementation DDHidQueue
- (id) initWithHIDQueue: (IOHIDQueueInterface **) queue
size: (unsigned) size;
{
self = [super init];
if (self == nil)
return nil;
mQueue = queue;
IOReturn result = (*mQueue)->create(mQueue, 0, size);
if (result != kIOReturnSuccess)
{
[self release];
return nil;
}
return self;
}
- (void) dealloc;
{
[self stop];
(*mQueue)->dispose(mQueue);
(*mQueue)->Release(mQueue);
[super dealloc];
}
- (void) addElement: (DDHidElement *) element;
{
IOHIDElementCookie cookie = [element cookie];
(*mQueue)->addElement(mQueue, cookie, 0);
}
- (void) addElements: (NSArray *) elements;
{
return [self addElements: elements recursively: NO];
}
- (void) addElements: (NSArray *) elements recursively: (BOOL) recursively;
{
NSEnumerator * e = [elements objectEnumerator];
DDHidElement * element;
while (element = [e nextObject])
{
[self addElement: element];
if (recursively)
[self addElements: [element elements]];
}
}
- (void) setDelegate: (id) delegate;
{
mDelegate = delegate;
}
- (void) startOnCurrentRunLoop;
{
[self startOnRunLoop: [NSRunLoop currentRunLoop]];
}
- (void) startOnRunLoop: (NSRunLoop *) runLoop;
{
if (mStarted)
return;
mRunLoop = [runLoop retain];
NSXThrowError((*mQueue)->createAsyncEventSource(mQueue, &mEventSource));
NSXThrowError((*mQueue)->setEventCallout(mQueue, queueCallbackFunction, self, NULL));
CFRunLoopAddSource([mRunLoop getCFRunLoop], mEventSource,
kCFRunLoopDefaultMode);
(*mQueue)->start(mQueue);
mStarted = YES;
}
- (void) stop;
{
if (!mStarted)
return;
CFRunLoopRemoveSource([mRunLoop getCFRunLoop], mEventSource, kCFRunLoopDefaultMode);
(*mQueue)->stop(mQueue);
[mRunLoop release];
CFRelease(mEventSource);
mRunLoop = nil;
mStarted = NO;
}
- (BOOL) isStarted;
{
return mStarted;
}
- (BOOL) getNextEvent: (IOHIDEventStruct *) event;
{
AbsoluteTime zeroTime = {0, 0};
IOReturn result = (*mQueue)->getNextEvent(mQueue, event, zeroTime, 0);
return (result == kIOReturnSuccess);
}
- (DDHidEvent *) nextEvent;
{
AbsoluteTime zeroTime = {0, 0};
IOHIDEventStruct event;
IOReturn result = (*mQueue)->getNextEvent(mQueue, &event, zeroTime, 0);
if (result != kIOReturnSuccess)
return nil;
else
return [DDHidEvent eventWithIOHIDEvent: &event];
}
@end
@implementation DDHidQueue (Private)
- (void) handleQueueCallback;
{
if ([mDelegate respondsToSelector: @selector(ddhidQueueHasEvents:)])
{
[mDelegate ddhidQueueHasEvents: self];
}
}
@end
static void queueCallbackFunction(void* target, IOReturn result, void* refcon,
void* sender)
{
NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
DDHidQueue * queue = (DDHidQueue *) target;
[queue handleQueueCallback];
[pool release];
}