The current implementation skips hidden classes, which breaks KVO.
It turns out that GSGetMethod + method_getImplementation is about
50% slower than objc_msg_lookup (gnustep-2.2 ABI).
Removes dependency on pthread library and uses fast Slim Reader/Writer (SRW) locks for NSLock/NSRecursiveLock/NSCondition/NSConditionLock as well as all internal locks. Adds GS_MUTEX_*() macros in GSPThread.h, that are being used for all internal locking instead of pthread APIs.
Also adds support for thread priorities on Windows, fixes method signature of +[NSThread setThreadPriority:] to match Apple platforms, and adds error handling in same method.
When using the GNUstep runtime, use the safe mechanism for checking whether there is more than one typed selector, and only use that as a guess if it is safe to do so. With the GCC runtime, we are still stuck using the API that it is impossible to use safely (we might be better off just giving up at this point), but now we call this after -methodSignatureForSelector:, so the app developer gets a chance to do the right thing before we do the wrong thing.
Also changed the assert to throw an exception if no type signature can be found. This behaviour is consistent with Mac OS X.
git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@32257 72102866-910b-0410-8b05-ffd578937521
All of the sel_* stuff is now replaced with the newer APIs. As a side-effect, a blob of code that was copied-and-pasted all over GNUstep has now been moved into ObjectiveC2 and just called.
Class posing with libobjc2 will now throw an exception, rather than just aborting.
git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@31268 72102866-910b-0410-8b05-ffd578937521
Most of these changes involve simply removing direct manipulation of any runtime structures and replacing them with runtime function calls. For example class->name becomes class_getName(class) and so on.
libobjc2, like the Apple runtime, the NeXT runtime, and every version of the Objective-C spec, calls the class pointer in id isa. A few files now have #define class_pointer isa at the top. This line replaces class_pointer in the old GNU libobjc headers with isa so either class_pointer or isa can be used for accessing the class of an object. Note: object_getClass() should be used in most cases because, in some future version of the runtime, this will skip things like lock classes and other hidden classes (e.g. KVO classes).
All of the old forwarding stuff has been removed. Most of this stuff followed convoluted code paths that ended with an exception. A few simply broke in exciting ways. Hopefully no one has used them for the last ten years or so, but we can bring them back with some #ifndef stuff if they're really needed by anyone.
There is currently a bug in configure, which prevents dladdr() from being detected, so you need to manually tweak config.h to build - I have not fixed the fall-back code in objc-load.m to work with libobjc2, I just added a new version that uses the loader's functionality directly.
Although -base now builds, it builds with a lot of warnings. <string.h> is missing from a lot of files, so memcpy() and strlen() generate implicit function declaration warnings.
Additionally, libobjc2 does still provide the sel_{get,register}_*() functions, but they're wrappers around the newer API ones. These are deprecated and are not exposed in the headers. Although they work, we should be replacing them with the libobjc2 versions as soon as possible.
This incorporates a patch by Eric.
git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@31265 72102866-910b-0410-8b05-ffd578937521
