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POCan CARemoteLayerServer and CARemoteLayerClient be used between processes?
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copied!<p>In Mac OS X Lion CARemoteLayerServer and CARemoteLayerClient were added to QuartzCore. I've been trying to investigate if they'd be suitable for splitting a graphical application between multiple processes, but without success.</p> <p>I can use them successfully within a single process, with some code along the lines of this:</p> <pre><code>- (void)buildLayerSingleProcess { CARemoteLayerServer *server = [CARemoteLayerServer sharedServer]; self.client = [[CARemoteLayerClient alloc] initWithServerPort: server.serverPort]; uint32_t clientID = self.client.clientId; CALayer *layer1 = [CALayer layer]; layer1.bounds = CGRectMake(0.0, 0.0, 100.0, 100.0); CGColorRef color = CGColorCreateGenericRGB(0.4, 0.2, 0.3, 1.0); [layer1 setBackgroundColor: color]; CFRelease(color); [layer1 setOpacity: 0.75]; [layer1 setBorderWidth: 5.0f]; layer1.position = CGPointMake([[self.window contentView] frame].size.width / 2.0, [[self.window contentView] frame ].size.height / 2.0); self.client.layer = layer2; CALayer *servedLayer = [CALayer layerWithRemoteClientId: self.client.clientId]; [[[self.window contentView] layer] addSublayer: servedLayer]; } </code></pre> <p>Which is nice, but I'd like to try and do something similar between processes. The fact that server.serverPort is of type mach_port_t implies that it'd be suitable for use between processes.</p> <p>However, when I split that code up to run in two processes (either two individual apps, or a main process and an XPC service), when I try to initialise the CARemoteLayerClient with the mach_port_t from the server in the other process I get:</p> <pre><code>unable to register with server: 0x10000003 </code></pre> <p>It may well be they're not suited for between random processes, but the use of mach_port_t kinda implies that.</p> <p>Has anyone else had any success using these classes between processes?</p>

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