Bluetooth Preview for Mac OS X v10.1.5: Anyone?
Bluetooth Preview for Mac OS X v10.1.5: Anyone?
- Subject: Bluetooth Preview for Mac OS X v10.1.5: Anyone?
- From: Alexander Traud <email@hidden>
- Date: Fri, 22 Jul 2011 12:25:55 +0200
- Thread-topic: Bluetooth Preview for Mac OS X v10.1.5: Anyone?
Please, could somebody send me a copy of the Apple Bluetooth Preview for Mac
OS X v10.1.5?
By the way, IOBluetoothDeviceOpenRFCOMMChannel is not available since v10.7
(Lion; Apple Bluetooth 2.5). Let's look around for a replacement:
a) IOBluetoothDeviceOpenRFCOMMChannelSync
does not work for me reliably, since v10.5. Although it opens the channel,
it returns an error. Sometimes it works without error. Are there any
examples using it successfully? Until now, I gave up on it.
b) IOBluetoothDeviceOpenRFCOMMChannelAsync
works. However, I would have to change too much of my code. Furthermore, it
is deprecated.
c) openRFCOMMChannelSync:withChannelID:delegate:
works. However, it is Objective-C. If your environment does not support
mixed source code, let us have a look how to call this as C code:
1. Create an Objective-C class for the delegate
2. Add methods to class required by protocol
3. Add protocol to class
4. Register class within runtime, get an instance
5. Register this instance as delegate within IOBluetooth
This delegate receives the events of the RFCOMM channel.
On the net, I did not find a example, how to do create such a delegate. Here
is my working solution. It is pseudo-code because I used REALbasic:
// 1. Create an Objective-C class = delegate
className = "MyIOBluetoothRFCOMMChannelDelegate"
superCls = objc_lookUpClass("NSObject")
delegateCls = objc_allocateClassPair(superCls, className, 0)
// 2. Add methods to delegate required by protocol
succeeded = class_addMethod(delegateCls,
sel_registerName("rfcommChannelData:data:length:";), AddressOf
YourCallbackForIOBluetoothRFCommChannelEventData, "v@:^v^vL")
succeeded = class_addMethod(delegateCls,
sel_registerName("rfcommChannelOpenComplete:status:"), AddressOf
YourCallbackForIOBluetoothRFCommChannelEventOpenComplete, "v@:^vL")
succeeded = class_addMethod(delegateCls,
sel_registerName("rfcommChannelClosed:"), AddressOf
YourCallbackForIOBluetoothRFCommChannelEventClosed, "v@:^v")
succeeded = class_addMethod(delegateCls,
sel_registerName("rfcommChannelControlSignalsChanged:"), AddressOf
YourCallbackForIOBluetoothRFCommChannelEventControlSignalsChanged, "v@:^v")
succeeded = class_addMethod(delegateCls,
sel_registerName("rfcommChannelFlowControlChanged:"), AddressOf
YourCallbackForIOBluetoothRFCommChannelEventFlowControlChanged, "v@:^v")
succeeded = class_addMethod(delegateCls,
sel_registerName("rfcommChannelWriteComplete:refcon:status:"), AddressOf
YourCallbackForIOBluetoothRFCommChannelEventWriteComplete, "v@:^v^vL")
succeeded = class_addMethod(delegateCls,
sel_registerName("rfcommChannelQueueSpaceAvailable:"), AddressOf
YourCallbackForIOBluetoothRFCommChannelEventQueueSpaceAvailable, "v@:^v")
// 3. Add protocol
protocolName = "IOBluetoothRFCOMMChannelDelegate"
protocolRef = objc_getProtocol(protocolName)
succeeded = class_addProtocol(delegateCls, protocolRef)
// 4. Register class within runtime, get an instance
objc_registerClassPair(delegateCls)
delegateInst = class_createInstance(delegateCls, 0)
// 5. Register instance as delegate within IOBluetooth
sel = sel_registerName("openRFCOMMChannelSync:withChannelID:delegate:")
err = objc_msgSend(deviceRef, sel, channelRef, channelID, delegateInst)
// since v10.6: release but do not retain the channelRef
This pseudo code requires v10.5 and is 64-bit-code ready. In v10.4 and
earlier, structs had to be used (and filled) instead of calling methods.
Therefore, I use IOBluetoothDeviceOpenRFCOMMChannel for older Mac OS X
releases. Because you cannot register the delegate (at least its class)
within the Objective-C runtime several times, I use the Singleton design
pattern.
Further reading (first one is recommended, the rest is for reference):
1. Objective-C Runtime Reference, 2.0
2. Objective-C Runtime Programming Guide, Chapter 6, Type Encodings
3. The Objective-C Programming Language, Chapter 4, Protocols
4. Inspired by <http://www.declaresub.com/ideclare/Cocoa/6.html>
If you find a bug, please, report that to me! I use this in a commercial app
and in my public domain IOBluetooth library written for REAL Studio.
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