add ffi/unsafe/nsalloc' and ffi/unsafe/nsstring'

original commit: 088d1dadb407132ad3b2398fc50e480e86a2fab5

collects/mred/private/wx/cocoa/types.rkt

@@ -1,6 +1,7 @@
 #lang racket/base
 (require ffi/unsafe/objc
          ffi/unsafe
+         ffi/unsafe/nsstring
          "../../lock.rkt"
          "utils.rkt")
 
@@ -11,9 +12,9 @@
               _NSSize _NSSize-pointer (struct-out NSSize)
               _NSRect _NSRect-pointer (struct-out NSRect)
               _NSRange _NSRange-pointer (struct-out NSRange)
-              NSObject 
-              NSString _NSString
-              NSNotFound))
+              NSObject
+              NSNotFound)
+ _NSString)
 
 (define _NSInteger _long)
 (define _NSUInteger _ulong)
@@ -41,23 +42,6 @@
 
 (import-class NSObject NSString)
 
-(define strings (make-weak-hash))
-(define _NSString (make-ctype _id
-                              (lambda (v)
-                                (or (hash-ref strings v #f)
-                                    (let ([s (as-objc-allocation
-                                              (tell (tell NSString alloc)
-                                                    initWithUTF8String:
-                                                    #:type _string
-                                                    v))])
-                                      (hash-set! strings v s)
-                                      s)))
-                              (lambda (v)
-                                (atomically
-                                 (with-autorelease
-                                  (let ([s (tell #:type _bytes v UTF8String)])
-                                    (bytes->string/utf-8 s)))))))
-
 (define NSNotFound (if 64-bit?
                        #x7fffffffffffffff
                        #x7fffffff))

collects/mred/private/wx/cocoa/utils.rkt

@@ -3,6 +3,7 @@
          ffi/unsafe
          ffi/unsafe/alloc
          ffi/unsafe/define
+         ffi/unsafe/nsalloc
          "../common/utils.rkt"
          "../../lock.rkt")
 
@@ -17,13 +18,14 @@
               as-objc-allocation-with-retain
               clean-up-deleted
               retain release
-              with-autorelease
               clean-menu-label
               ->wxb
               ->wx
               old-cocoa?
               version-10.6-or-later?
               version-10.7-or-later?)
+ with-autorelease
+ call-with-autorelease
  define-mz)
 
 (define cocoa-lib (ffi-lib (format "/System/Library/Frameworks/Cocoa.framework/Cocoa")))
@@ -59,18 +61,6 @@
                 (lambda (obj)
                   (tellv obj retain))))
 
-(import-class NSAutoreleasePool)
-
-;; Use `with-autorelease' and `call-with-autorelease' 
-;; in atomic mode
-(define-syntax-rule (with-autorelease expr ...)
-  (call-with-autorelease (lambda () expr ...)))
-(define (call-with-autorelease thunk)
-  (let ([pool (tell (tell NSAutoreleasePool alloc) init)])
-    (begin0
-     (thunk)
-     (tellv pool release))))
-
 (define (clean-menu-label str)
   (regexp-replace* #rx"&(.)" str "\\1"))