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/*
 * @test
 * @bug 8248421
 * @summary SystemCLinker should have a way to free memory allocated outside Java
 * @run testng/othervm -Dforeign.restricted=permit TestFree
 */

import jdk.incubator.foreign.MemoryAccess;
import jdk.incubator.foreign.MemoryAddress;
import jdk.incubator.foreign.MemoryLayout;
import jdk.incubator.foreign.MemorySegment;
import static jdk.incubator.foreign.CLinker.*;
import static org.testng.Assert.assertEquals;

public class TestFree {
    private static MemorySegment asArrayRestricted(MemoryAddress addr, MemoryLayout layout, int numElements) {
        return addr.asSegmentRestricted(numElements * layout.byteSize());
    }

    public void test() throws Throwable {
        String str = "hello world";
        MemoryAddress addr = allocateMemoryRestricted(str.length() + 1);
        MemorySegment seg = asArrayRestricted(addr, C_CHAR, str.length() + 1);
        seg.copyFrom(MemorySegment.ofArray(str.getBytes()));
        MemoryAccess.setByteAtOffset(seg, str.length(), (byte)0);
        assertEquals(str, toJavaString(seg));
        freeMemoryRestricted(addr);
    }
}