test/atomicProperty.mm

   1 // TEST_CONFIG CC=clang
   2
   3 #include "test.h"
   4 #include <objc/runtime.h>
   5 #include <objc/objc-internal.h>
   6 #import <Foundation/NSObject.h>
   7
   8 class SerialNumber {
   9     size_t _number;
  10 public:
  11     SerialNumber() : _number(42) {}
  12     SerialNumber(const SerialNumber &number) : _number(number._number + 1) {}
  13     SerialNumber &operator=(const SerialNumber &number) { _number = number._number + 1; return *this; }
  14
  15     int operator==(const SerialNumber &number) { return _number == number._number; }
  16     int operator!=(const SerialNumber &number) { return _number != number._number; }
  17 };
  18
  19 @interface TestAtomicProperty : NSObject {
  20     SerialNumber number;
  21 }
  22 @property(atomic) SerialNumber number;
  23 @end
  24
  25 @implementation TestAtomicProperty
  26
  27 #if 1 // with new enough compiler, this will be synthesized automatically.
  28
  29 extern void objc_copyCppObjectAtomic(void *dest, const void *src, void (*copyHelper) (void *dest, const void *source));
  30
  31 static void copySerialNumber(void *d, const void *s) {
  32     SerialNumber *dest = (SerialNumber *)d;
  33     const SerialNumber *src = (const SerialNumber *)s;
  34     dest->operator=(*src);
  35 }
  36
  37 - (SerialNumber)number {
  38     SerialNumber result;
  39     objc_copyCppObjectAtomic(&result, &number, copySerialNumber);
  40     return result;
  41 }
  42
  43 - (void)setNumber:(SerialNumber)aNumber {
  44     objc_copyCppObjectAtomic(&number, &aNumber, copySerialNumber);
  45 }
  46
  47 +(void)initialize {
  48     testwarn("rdar://6137845 compiler should synthesize calls to objc_copyCppObjectAtomic");
  49 }
  50
  51 #else
  52 @synthesize number;
  53 #endif
  54
  55 @end
  56
  57 int main()
  58 {
  59     PUSH_POOL {
  60         SerialNumber number;
  61         TestAtomicProperty *test = [TestAtomicProperty new];
  62         test.number = number;
  63         testassert(test.number != number);
  64     } POP_POOL;
  65
  66     succeed(__FILE__);
  67 }