Add shared implementation of a NSAutoreleasePool wrapper to qglobal

We have at least 5 different (but equal) implementations of a wrapper
in Qt, and some code uses explicit NSAutoreleasePools. Having a shared
implementation lets us clean up things a bit and makes it easier to
reason about which pools are actually needed.

Change-Id: I2fd8eefc3ae7308595ef9899b7820206268362a5
Reviewed-by: Tim Blechmann <tim@klingt.org>
Reviewed-by: Simon Hausmann <simon.hausmann@theqtcompany.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/src/corelib/kernel/qcore_mac_objc.mm b/src/corelib/kernel/qcore_mac_objc.mm
index a215557aed..14c0f803b9 100644
--- a/src/corelib/kernel/qcore_mac_objc.mm
+++ b/src/corelib/kernel/qcore_mac_objc.mm
@@ -131,5 +131,22 @@ QAppleOperatingSystemVersion qt_apple_os_version()
     return v;
 }
 
+// -------------------------------------------------------------------------
+
+QMacAutoReleasePool::QMacAutoReleasePool()
+    : pool([[NSAutoreleasePool alloc] init])
+{
+}
+
+QMacAutoReleasePool::~QMacAutoReleasePool()
+{
+    // Drain behaves the same as release, with the advantage that
+    // if we're ever used in a garbage-collected environment, the
+    // drain acts as a hint to the garbage collector to collect.
+    [pool drain];
+}
+
+// -------------------------------------------------------------------------
+
 QT_END_NAMESPACE