site_archiver@lists.apple.com Delivered-To: darwin-kernel@lists.apple.com Hi All, Please let me know. Thanks, --shailesh _________________________________________________________________ http://im.live.com/messenger/im/home/?source=hmtextlinkjuly07 _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.a... I have developed a kernel extension which needs to communicate asynchronously with an application (which is also developed by us). Basically, the kext needs to notify various custom events to the application and requires to provide little data along with the event (this data may not exceed say 20 bytes). These events are very much specific to the kext and the app like: 1. The kext is running out of resources OR 2. The kext is ready and the application can query data. etc. One (real bad) way is that the application invokes IoCtl in an infinite loop to the device file of my kext and every time a notification is to be done the kext completes the Ioctl and copies data to user buffers, but this may also result in lots of race conditions. Any AIO methods would result in same problem. Hence I am looking for some truly asynchronous way to talk to my application. Another way I felt was to send signal to the application (psignal) but I will be restricted to a limited set of signals and also I will not be able to send data with the signals. kevents too work for standard events (am I right??) Is there a way out for this problem. Does Mac provide some interface(may be in traditional UNIX ways) to communicate asynchronously from kernel to user apps? This email sent to site_archiver@lists.apple.com