On Dec 16, 2008, at 7:22 PM, Michael Ash wrote:
On Tue, Dec 16, 2008 at 8:02 PM, Chris Idou <idou...@yahoo.com> wrote:
Is there any Cocoa and/or Carbon interface to UNIX signals?
Nope. It's pretty easy to set up a signal handler that can call back
to a Cocoa/CoreFoundation runloop though, by having it write to a pipe
or mach port which the runloop monitors.
Be warned that, to a close approximation, your code isn't allowed to
do anything inside the signal handler itself. This includes sending
any Objective-C messages to any object. (objc_msgSend may take locks.
If the signal is interrupting a thread that already holds those locks,
you're stuck.)
The official list of functions you can call is in the sigaction man
page. Some Mach functions are also safe, but I don't know of an
official list of which ones.
--
Greg Parker gpar...@apple.com Runtime Wrangler
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