The macro
with-auto-release-pool
creates a new autorelease pool and evaluates each
form
in sequence. The pool is released at the end, even if a non-local exit is performed by the
form
s. An autorelease pool is provided automatically for the main thread when running CAPI with Cocoa, but other threads need to allocate one if they call Objective-C methods that use autorelease.
The
"description"
method returns an autoreleased NSString, so to make this function safe for use anywhere, the
with-auto-release-pool
macro is used:
(defun object-description (object)
(with-autorelease-pool ()
(invoke-into 'string object "description")))