Good:
* We now no longer wrap the system malloc zone.
* Tiny allocation quantum is pointer sized, not 16 bytes.
* Far less metadata overhead than the system malloc zone.
Bad:
* Our heap density isn't quite as good as the default zone. This is a O(1)
versus O(N) tradeoff. The default malloc zone has been trending in this
direction too.
TODO:
* Introspection
* Tune secondary fast paths
* Huge allocations
Swift SVN r15269
Playgrounds want to be able to represent numbers different from strings, so provide different tags for types that represent numbers distinct from strings. Set up the Int and Double mirrors to return quick look objects of the appropriate cases, and hook up the magic ObjC mirror to do the same for NSNumbers. <rdar://problem/16360758>
Swift SVN r15219
Only the bits that actually need to grovel metadata really need to be written in C++, so define away hopefully most of the potential for memory safety or corruption bugs from screwing up calling convention matchups by moving most of the magic mirror implementations into pure Swift.
Swift SVN r15180
We'll need to apply the same tricks we're using for Array to Dictionary
and String, so prepare to generate base classes for those buffers as
well. Actually generate and use the one for Dictionary, but don't
actually bridge it yet.
Swift SVN r15167
We want the metadata of the ObjC class, not the opaque Builtin.ObjCPointer metadata. This allows the Any to actually be downcast to an expected type on the client side.
Swift SVN r15009
Now that we can read definitions directly from "C" headers, stop trying
to maintain a mirror of the HeapObject struct in Swift code in the
standard library.
Swift SVN r14982
Add 'Sound', 'Color', and 'BezierPath', as requested by Enrico, as well as a '_Raw' case that can be used for internal experimentation.
Swift SVN r14978
Turns out CMake's PRE_BUILD mode for custom commands doesn't work with the
Ninja or Makefile generators (not sure about Xcode). Just do it as part of
an earlier target instead.
Swift SVN r14968
[This time, shims.h doesn't depend even on a system header; hopefully the
'bot will be happy enough with that until someone fixes the build system
to allow "#include <stdint.h>" to appear in shims.h]
Now we can essentially send an NSRange instance in a message to a
CocoaArray without having loaded foundation.
Swift SVN r14957
malloc_size() also is used to determine which zone owns a given allocation.
<rdar://problem/16293435> malloc_size is getting called recursively
Swift SVN r14928
Implicit conversions to and from an unsigned long long enum class give us the calling convention we want for swift_allocBox without totally destroying the API for C callers.
Swift SVN r14919
This broke systems where it isn't appropriate to clear the module cache.
The build script already does this when you do a full build; for other
cases, we should just deal with it. (You can still specify a custom
MODULE_CACHE_PATH to make it easier to delete, rather than relying on the
system one.)
This reverts commit r14364.
<rdar://problem/16232176>
Swift SVN r14872
