assignweakgc.m   [plain text]

/*
 * Copyright (c) 2010 Apple Inc. All rights reserved.
 *
 * @APPLE_LLVM_LICENSE_HEADER@
 */

/*
  TEST_CONFIG SDK=macosx GC=1
  TEST_CFLAGS -framework Foundation
 */

#import <objc/objc-auto.h>
#import <Foundation/Foundation.h>
#import "test.h"

int GlobalInt = 0;
int GlobalInt2 = 0;

#ifdef __cplusplus
extern "C" {
#endif
id objc_assign_weak(id value, id *location) {
    GlobalInt = 1;
    *location = value;
    return value;
}

id objc_read_weak(id *location) {
    GlobalInt2 = 1;
    return *location;
}
#ifdef __cplusplus
}
#endif

void (^__weak Henry)(void);

int main() {
    __block int i = 0;
    Henry = ^ {  ++i; };
    if (GlobalInt != 1) {
        fail("problem with weak write-barrier assignment of global block");
    }

    succeed(__FILE__);
}