Interim commit.

examples/bluetooth/main.go

@@ -38,9 +38,9 @@ func discoverPeripheral(c *ns.CBCentralManager, p *ns.CBPeripheral, d *ns.NSDict
 	// and if so release the old one. Be careful to check the Objective-C pointers
 	// here as the Go pointers will differ.
 
-	if peripheral != nil && p.Ptr() != peripheral.Ptr() {
+//	if peripheral != nil && p.Ptr() != peripheral.Ptr() {
-		peripheral.Release()
+//		peripheral.Release()
-	}
+//	}
 
 	peripheral = p
 

examples/gc/main.go

@@ -140,12 +140,18 @@ func memtest5() {
 		// finalizer.
 
 		sub := str.SubstringFromIndex(5)
-		_ = sub
+		sub2 := sub.Copy().NSString()
+		sub3 := sub2.MutableCopy().NSString()
 		u := sub.UTF8String()
+		u2 := sub2.UTF8String()
+		u3 := sub3.UTF8String()
 		_ = u
+		_ = u2
+		_ = u3
 		time.Sleep(time.Second/50)
 		runtime.GC()
 		i++
+		fmt.Printf("loop completed\n")
 	}
 }
 

types/convert.go

@@ -384,7 +384,7 @@ func (t *Type) CToGo(cval string) string {
 }
 
 // Call a C function from Go with a given return type and parameter types
-func GoToC(name string, pnames, snames []string, rtype *Type, ptypes []*Type, fun, fin bool, cm bool) string {
+func GoToC(sname, name string, pnames, snames []string, rtype *Type, ptypes []*Type, fun, fin bool, cm bool) string {
 	if rtype == nil {
 		//fmt.Println("nil sent to GoToC")
 		return ""
@@ -494,12 +494,16 @@ func GoToC(name string, pnames, snames []string, rtype *Type, ptypes []*Type, fu
 	}`, pnames[i], pnames[i], pnames[i], pnames[i], sname, pnames[i], pnames[i], pnames[i], pnames[i], ptgt, pnames[i], sname))
 	}
 	if rt != "void" {
-		if fin {
+		cmp := ""
-			cmp := ""
+		if sw {
-			if !cm {
+			if !cm && sname != "copy" && sname != "mutableCopy" {
-				cmp = fmt.Sprintf(`if ret.ptr == o.ptr { return (%s)(unsafe.Pointer(o)) }
+				cmp = fmt.Sprintf(`
-	`,rtgt)
+	if ret.ptr == o.ptr { return (%s)(unsafe.Pointer(o)) }`,rtgt)
 			}
+			ret.WriteString(fmt.Sprintf(`
+	if ret.ptr == nil { return ret }%s`,cmp))
+		}
+		if fin {
 			dbg := ""
 			dbg2 := ""
 			if Debug {
@@ -509,10 +513,9 @@ func GoToC(name string, pnames, snames []string, rtype *Type, ptypes []*Type, fu
 	`, rtgt)
 			}
 			ret.WriteString(fmt.Sprintf(`
-	if ret.ptr == nil { return ret }
+	%sruntime.SetFinalizer(ret, func(o %s) {
-	%s%sruntime.SetFinalizer(ret, func(o %s) {
 		%so.Release()
-	})`, cmp, dbg, rtgt, dbg2))
+	})`, dbg, rtgt, dbg2))
 		}
 		ret.WriteString(`
 	return ret`)

wrap/main.go

@@ -165,6 +165,13 @@ func shouldFinalize (grtype, name string) bool {
 // IsRetained returns true if the name matches a retained property for the
 // given interface.
 func (i *Interface) IsRetained(name string) bool {
+	// init, copy and MutableCopy always return a retained object
+	if 	len(name) >= 4 && (name[:4] == "init" ||
+			name[:4] == "copy") ||
+		len(name) >= 11 && name[:11] == "mutableCopy" {
+		return true
+	}
+
 	if p, ok := i.Properties[name]; ok {
 		if p.retained {
 			return true
@@ -1081,7 +1088,7 @@ func %s%s(%s) %s {
 `, snames[i], n, n, snames[i], n))
 	}
 	w.goCode.WriteString(`	` +
-		types.GoToC(cname, ns, snames, m.Type, tps, fun, m.ShouldFinalize() && (m.ClassMethod || !inter.IsRetained(m.Name)), m.ClassMethod) + "\n}\n")
+		types.GoToC(m.Name, cname, ns, snames, m.Type, tps, fun, m.ShouldFinalize(), m.ClassMethod) + "\n}\n")
 
 	cret := ""
 	if !m.isVoid() {
@@ -1130,15 +1137,13 @@ func %s%s(%s) %s {
 		[ret retain];`
 					}
 
-				case len(m.Name) >= 4 && m.Name[:4] == "init":
+				// some methods always return retained objects,
-				// init always returns a retained object
+				// including "getters" for retained properties.
-
 				case inter.IsRetained(m.Name):
-				// some methods relate to retained properties
-				// do not retain these again
 
 				default:
-				// by default, retain if returning a new object
+				// by default, for instance methods, retain
+				// if returning a new object
 					rtn = `
 		if (o != ret) { [ret retain]; }`
 				}
@@ -1167,7 +1172,8 @@ func %s%s(%s) %s {
 		if Debug {
 			dbg = fmt.Sprintf(`fmt.Printf("Setting GC finalizer (%s): %%p -> %%p\n", o, o.ptr)
 	`,cls)
-			dbg2 = fmt.Sprintf(`fmt.Printf("GC finalizer (%s): release %%p -> %%p\n", o, o.ptr)`, cls)
+			dbg2 = fmt.Sprintf(`fmt.Printf("GC finalizer (%s): release %%p -> %%p\n", o, o.ptr)
+		`, cls)
 		}
 		w.goCode.WriteString(fmt.Sprintf(`
 func (o *%s) GC() {
@@ -1718,7 +1724,7 @@ void*
 			dbg = fmt.Sprintf(`fmt.Printf("Setting finalizer (%s): %%p -> %%p\n", ret, ret.ptr)
 	`, gname)
 			dbg2 = fmt.Sprintf(`fmt.Printf("Finalizer (%s): release %%p -> %%p\n", o, o.ptr)
-	`, gname)
+		`, gname)
 		}
 		if Gogc {
 			w.goImports["runtime"] = true
@@ -1738,6 +1744,10 @@ func %sAlloc() *%s {
 }
 `, gname, gname, gname, dname, finalizer))
 		if Gogc {
+			if Debug {
+				dbg = fmt.Sprintf(`fmt.Printf("Setting finalizer (%s): %%p -> %%p\n", o, o.ptr)
+	`, gname)
+			}
 			gocode.WriteString(fmt.Sprintf(`
 func (o *%s) GC() {
 	if o.ptr == nil { return }
@@ -1912,7 +1922,7 @@ func (o *%s) Super%s(%s) %s {
 	}
 `, vn, w.Vaargs, vn, vn))
 			}
-			gocode.WriteString("\t" + types.GoToC(dname+"_super_"+m.Name, ns, snames, m.Type, tps, false, m.ShouldFinalize(), m.ClassMethod) + "\n}\n")
+			gocode.WriteString("\t" + types.GoToC(m.Name, dname+"_super_"+m.Name, ns, snames, m.Type, tps, false, m.ShouldFinalize(), m.ClassMethod) + "\n}\n")
 		}
 	}
 	w.cCode.WriteString(cprotos.String())