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POActivity monitor not responding
 

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    <p>when i'm calling the below function in a time interval of 1 second, it would cause Not Responding in Activity Monitor, anyone can tell me why and suggest a solution?</p> <pre><code>NSWorkspace* workspace = [NSWorkspace sharedWorkspace]; NSDictionary* currentAppInfo = [workspace activeApplication]; //get the PSN of the current app UInt32 lowLong = [[currentAppInfo objectForKey:@"NSApplicationProcessSerialNumberLow"] longValue]; UInt32 highLong = [[currentAppInfo objectForKey:@"NSApplicationProcessSerialNumberHigh"] longValue]; ProcessSerialNumber currentAppPSN = {highLong,lowLong}; //grab window information from the window server CFArrayRef windowList = CGWindowListCopyWindowInfo(kCGWindowListOptionOnScreenOnly, kCGNullWindowID); ProcessSerialNumber myPSN = {kNoProcess, kNoProcess}; //loop through the windows, the window list is ordered from front to back for (NSMutableDictionary* entry in (NSArray*) windowList) { int pid = [[entry objectForKey:(id)kCGWindowOwnerPID] intValue]; GetProcessForPID(pid, &amp;myPSN); //if the process of the current window in the list matches our process, get the front window number if(myPSN.lowLongOfPSN == currentAppPSN.lowLongOfPSN &amp;&amp; myPSN.highLongOfPSN == currentAppPSN.highLongOfPSN) { NSNumber* windowNumber = [entry objectForKey:(id)kCGWindowNumber]; NSString* applicationName = [entry objectForKey:(id)kCGWindowOwnerName]; NSLog(@"The current app is %@ and the window number of its front window is %@.",applicationName,windowNumber); //break because we only want the front window break; } } CFRelease(windowList); </code></pre>
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