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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

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 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

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 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

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 *

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/*

 * @test

 * @run testng/othervm -Diters=10    -Xint                   VarHandleTestAccessChar

 * @run testng/othervm -Diters=20000 -XX:TieredStopAtLevel=1 VarHandleTestAccessChar

 * @run testng/othervm -Diters=20000                         VarHandleTestAccessChar

 * @run testng/othervm -Diters=20000 -XX:-TieredCompilation  VarHandleTestAccessChar

 */

import org.testng.annotations.BeforeClass;

import org.testng.annotations.DataProvider;

import org.testng.annotations.Test;

import java.lang.invoke.MethodHandles;

import java.lang.invoke.VarHandle;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.List;

import static org.testng.Assert.*;

public class VarHandleTestAccessChar extends VarHandleBaseTest {

    static final char static_final_v = '\u0123';

    static char static_v;

    final char final_v = '\u0123';

    char v;

    static final char static_final_v2 = '\u0123';

    static char static_v2;

    final char final_v2 = '\u0123';

    char v2;

    VarHandle vhFinalField;

    VarHandle vhField;

    VarHandle vhStaticField;

    VarHandle vhStaticFinalField;

    VarHandle vhArray;

    VarHandle[] allocate(boolean same) {

        List<VarHandle> vhs = new ArrayList<>();

        String postfix = same ? "" : "2";

        VarHandle vh;

        try {

            vh = MethodHandles.lookup().findVarHandle(

                    VarHandleTestAccessChar.class, "final_v" + postfix, char.class);

            vhs.add(vh);

            vh = MethodHandles.lookup().findVarHandle(

                    VarHandleTestAccessChar.class, "v" + postfix, char.class);

            vhs.add(vh);

            vh = MethodHandles.lookup().findStaticVarHandle(

                VarHandleTestAccessChar.class, "static_final_v" + postfix, char.class);

            vhs.add(vh);

            vh = MethodHandles.lookup().findStaticVarHandle(

                VarHandleTestAccessChar.class, "static_v" + postfix, char.class);

            vhs.add(vh);

            if (same) {

                vh = MethodHandles.arrayElementVarHandle(char[].class);

            }

            else {

                vh = MethodHandles.arrayElementVarHandle(String[].class);

            }

            vhs.add(vh);

        } catch (Exception e) {

            throw new InternalError(e);

        }

        return vhs.toArray(new VarHandle[0]);

    }

    @BeforeClass

    public void setup() throws Exception {

        vhFinalField = MethodHandles.lookup().findVarHandle(

                VarHandleTestAccessChar.class, "final_v", char.class);

        vhField = MethodHandles.lookup().findVarHandle(

                VarHandleTestAccessChar.class, "v", char.class);

        vhStaticFinalField = MethodHandles.lookup().findStaticVarHandle(

            VarHandleTestAccessChar.class, "static_final_v", char.class);

        vhStaticField = MethodHandles.lookup().findStaticVarHandle(

            VarHandleTestAccessChar.class, "static_v", char.class);

        vhArray = MethodHandles.arrayElementVarHandle(char[].class);

    }

    @DataProvider

    public Object[][] varHandlesProvider() throws Exception {

        List<VarHandle> vhs = new ArrayList<>();

        vhs.add(vhField);

        vhs.add(vhStaticField);

        vhs.add(vhArray);

        return vhs.stream().map(tc -> new Object[]{tc}).toArray(Object[][]::new);

    }

    @Test

    public void testEqualsAndHashCode() {

        VarHandle[] vhs1 = allocate(true);

        VarHandle[] vhs2 = allocate(true);

        for (int i = 0; i < vhs1.length; i++) {

            for (int j = 0; j < vhs1.length; j++) {

                if (i == j) {

                    assertEquals(vhs1[i], vhs1[i]);

                }

                else {

                    assertNotEquals(vhs1[i], vhs1[j]);

                    assertNotEquals(vhs1[i], vhs2[j]);

                }

            }

        }

        VarHandle[] vhs3 = allocate(false);

        for (int i = 0; i < vhs1.length; i++) {

            assertNotEquals(vhs1[i], vhs3[i]);

        }

    }

    @Test(dataProvider = "varHandlesProvider")

    public void testIsAccessModeSupported(VarHandle vh) {

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.GET));

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.SET));

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.GET_VOLATILE));

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.SET_VOLATILE));

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.GET_ACQUIRE));

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.SET_RELEASE));

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.GET_OPAQUE));

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.SET_OPAQUE));

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.COMPARE_AND_SET));

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.COMPARE_AND_EXCHANGE));

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.COMPARE_AND_EXCHANGE_ACQUIRE));

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.COMPARE_AND_EXCHANGE_RELEASE));

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.WEAK_COMPARE_AND_SET_PLAIN));

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.WEAK_COMPARE_AND_SET));

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.WEAK_COMPARE_AND_SET_ACQUIRE));

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.WEAK_COMPARE_AND_SET_RELEASE));

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.GET_AND_SET));

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.GET_AND_SET_ACQUIRE));

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.GET_AND_SET_RELEASE));

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.GET_AND_ADD));

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.GET_AND_ADD_ACQUIRE));

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.GET_AND_ADD_RELEASE));

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.GET_AND_BITWISE_OR));

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.GET_AND_BITWISE_OR_ACQUIRE));

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.GET_AND_BITWISE_OR_RELEASE));

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.GET_AND_BITWISE_AND));

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.GET_AND_BITWISE_AND_ACQUIRE));

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.GET_AND_BITWISE_AND_RELEASE));

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.GET_AND_BITWISE_XOR));

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.GET_AND_BITWISE_XOR_ACQUIRE));

        assertTrue(vh.isAccessModeSupported(VarHandle.AccessMode.GET_AND_BITWISE_XOR_RELEASE));

    }

    @DataProvider

    public Object[][] typesProvider() throws Exception {

        List<Object[]> types = new ArrayList<>();

        types.add(new Object[] {vhField, Arrays.asList(VarHandleTestAccessChar.class)});

        types.add(new Object[] {vhStaticField, Arrays.asList()});

        types.add(new Object[] {vhArray, Arrays.asList(char[].class, int.class)});

        return types.stream().toArray(Object[][]::new);

    }

    @Test(dataProvider = "typesProvider")

    public void testTypes(VarHandle vh, List<Class<?>> pts) {

        assertEquals(vh.varType(), char.class);

        assertEquals(vh.coordinateTypes(), pts);

        testTypes(vh);

    }

    @Test

    public void testLookupInstanceToStatic() {

        checkIAE("Lookup of static final field to instance final field", () -> {

            MethodHandles.lookup().findStaticVarHandle(

                    VarHandleTestAccessChar.class, "final_v", char.class);

        });

        checkIAE("Lookup of static field to instance field", () -> {

            MethodHandles.lookup().findStaticVarHandle(

                    VarHandleTestAccessChar.class, "v", char.class);

        });

    }

    @Test

    public void testLookupStaticToInstance() {

        checkIAE("Lookup of instance final field to static final field", () -> {

            MethodHandles.lookup().findVarHandle(

                VarHandleTestAccessChar.class, "static_final_v", char.class);

        });

        checkIAE("Lookup of instance field to static field", () -> {

            vhStaticField = MethodHandles.lookup().findVarHandle(

                VarHandleTestAccessChar.class, "static_v", char.class);

        });

    }

    @DataProvider

    public Object[][] accessTestCaseProvider() throws Exception {

        List<AccessTestCase<?>> cases = new ArrayList<>();

        cases.add(new VarHandleAccessTestCase("Instance final field",

                                              vhFinalField, vh -> testInstanceFinalField(this, vh)));

        cases.add(new VarHandleAccessTestCase("Instance final field unsupported",

                                              vhFinalField, vh -> testInstanceFinalFieldUnsupported(this, vh),

                                              false));

        cases.add(new VarHandleAccessTestCase("Static final field",

                                              vhStaticFinalField, VarHandleTestAccessChar::testStaticFinalField));

        cases.add(new VarHandleAccessTestCase("Static final field unsupported",

                                              vhStaticFinalField, VarHandleTestAccessChar::testStaticFinalFieldUnsupported,

                                              false));

        cases.add(new VarHandleAccessTestCase("Instance field",

                                              vhField, vh -> testInstanceField(this, vh)));

        cases.add(new VarHandleAccessTestCase("Instance field unsupported",

                                              vhField, vh -> testInstanceFieldUnsupported(this, vh),

                                              false));

        cases.add(new VarHandleAccessTestCase("Static field",

                                              vhStaticField, VarHandleTestAccessChar::testStaticField));

        cases.add(new VarHandleAccessTestCase("Static field unsupported",

                                              vhStaticField, VarHandleTestAccessChar::testStaticFieldUnsupported,

                                              false));

        cases.add(new VarHandleAccessTestCase("Array",

                                              vhArray, VarHandleTestAccessChar::testArray));

        cases.add(new VarHandleAccessTestCase("Array unsupported",

                                              vhArray, VarHandleTestAccessChar::testArrayUnsupported,

                                              false));

        cases.add(new VarHandleAccessTestCase("Array index out of bounds",

                                              vhArray, VarHandleTestAccessChar::testArrayIndexOutOfBounds,

                                              false));

        // Work around issue with jtreg summary reporting which truncates

        // the String result of Object.toString to 30 characters, hence

        // the first dummy argument

        return cases.stream().map(tc -> new Object[]{tc.toString(), tc}).toArray(Object[][]::new);

    }

    @Test(dataProvider = "accessTestCaseProvider")

    public <T> void testAccess(String desc, AccessTestCase<T> atc) throws Throwable {

        T t = atc.get();

        int iters = atc.requiresLoop() ? ITERS : 1;

        for (int c = 0; c < iters; c++) {

            atc.testAccess(t);

        }

    }

    static void testInstanceFinalField(VarHandleTestAccessChar recv, VarHandle vh) {

        // Plain

        {

            char x = (char) vh.get(recv);

            assertEquals(x, '\u0123', "get char value");

        }

        // Volatile

        {

            char x = (char) vh.getVolatile(recv);

            assertEquals(x, '\u0123', "getVolatile char value");

        }

        // Lazy

        {

            char x = (char) vh.getAcquire(recv);

            assertEquals(x, '\u0123', "getRelease char value");

        }

        // Opaque

        {

            char x = (char) vh.getOpaque(recv);

            assertEquals(x, '\u0123', "getOpaque char value");

        }

    }

    static void testInstanceFinalFieldUnsupported(VarHandleTestAccessChar recv, VarHandle vh) {

        checkUOE(() -> {

            vh.set(recv, '\u4567');

        });

        checkUOE(() -> {

            vh.setVolatile(recv, '\u4567');

        });

        checkUOE(() -> {

            vh.setRelease(recv, '\u4567');

        });

        checkUOE(() -> {

            vh.setOpaque(recv, '\u4567');

        });

    }

    static void testStaticFinalField(VarHandle vh) {

        // Plain

        {

            char x = (char) vh.get();

            assertEquals(x, '\u0123', "get char value");

        }

        // Volatile

        {

            char x = (char) vh.getVolatile();

            assertEquals(x, '\u0123', "getVolatile char value");

        }

        // Lazy

        {

            char x = (char) vh.getAcquire();

            assertEquals(x, '\u0123', "getRelease char value");

        }

        // Opaque

        {

            char x = (char) vh.getOpaque();

            assertEquals(x, '\u0123', "getOpaque char value");

        }

    }

    static void testStaticFinalFieldUnsupported(VarHandle vh) {

        checkUOE(() -> {

            vh.set('\u4567');

        });

        checkUOE(() -> {

            vh.setVolatile('\u4567');

        });

        checkUOE(() -> {

            vh.setRelease('\u4567');

        });

        checkUOE(() -> {

            vh.setOpaque('\u4567');

        });

    }

    static void testInstanceField(VarHandleTestAccessChar recv, VarHandle vh) {

        // Plain

        {

            vh.set(recv, '\u0123');

            char x = (char) vh.get(recv);

            assertEquals(x, '\u0123', "set char value");

        }

        // Volatile

        {

            vh.setVolatile(recv, '\u4567');

            char x = (char) vh.getVolatile(recv);

            assertEquals(x, '\u4567', "setVolatile char value");

        }

        // Lazy

        {

            vh.setRelease(recv, '\u0123');

            char x = (char) vh.getAcquire(recv);

            assertEquals(x, '\u0123', "setRelease char value");

        }

        // Opaque

        {

            vh.setOpaque(recv, '\u4567');

            char x = (char) vh.getOpaque(recv);

            assertEquals(x, '\u4567', "setOpaque char value");

        }

        vh.set(recv, '\u0123');

        // Compare

        {

            boolean r = vh.compareAndSet(recv, '\u0123', '\u4567');

            assertEquals(r, true, "success compareAndSet char");

            char x = (char) vh.get(recv);

            assertEquals(x, '\u4567', "success compareAndSet char value");

        }

        {

            boolean r = vh.compareAndSet(recv, '\u0123', '\u89AB');

            assertEquals(r, false, "failing compareAndSet char");

            char x = (char) vh.get(recv);

            assertEquals(x, '\u4567', "failing compareAndSet char value");

        }

        {

            char r = (char) vh.compareAndExchange(recv, '\u4567', '\u0123');

            assertEquals(r, '\u4567', "success compareAndExchange char");

            char x = (char) vh.get(recv);

            assertEquals(x, '\u0123', "success compareAndExchange char value");

        }

        {

            char r = (char) vh.compareAndExchange(recv, '\u4567', '\u89AB');

            assertEquals(r, '\u0123', "failing compareAndExchange char");

            char x = (char) vh.get(recv);

            assertEquals(x, '\u0123', "failing compareAndExchange char value");

        }

        {

            char r = (char) vh.compareAndExchangeAcquire(recv, '\u0123', '\u4567');

            assertEquals(r, '\u0123', "success compareAndExchangeAcquire char");

            char x = (char) vh.get(recv);

            assertEquals(x, '\u4567', "success compareAndExchangeAcquire char value");

        }

        {

            char r = (char) vh.compareAndExchangeAcquire(recv, '\u0123', '\u89AB');

            assertEquals(r, '\u4567', "failing compareAndExchangeAcquire char");

            char x = (char) vh.get(recv);

            assertEquals(x, '\u4567', "failing compareAndExchangeAcquire char value");

        }

        {

            char r = (char) vh.compareAndExchangeRelease(recv, '\u4567', '\u0123');

            assertEquals(r, '\u4567', "success compareAndExchangeRelease char");

            char x = (char) vh.get(recv);

            assertEquals(x, '\u0123', "success compareAndExchangeRelease char value");

        }

        {

            char r = (char) vh.compareAndExchangeRelease(recv, '\u4567', '\u89AB');

            assertEquals(r, '\u0123', "failing compareAndExchangeRelease char");

            char x = (char) vh.get(recv);

            assertEquals(x, '\u0123', "failing compareAndExchangeRelease char value");

        }

        {

            boolean success = false;

            for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {

                success = vh.weakCompareAndSetPlain(recv, '\u0123', '\u4567');

            }

            assertEquals(success, true, "weakCompareAndSetPlain char");

            char x = (char) vh.get(recv);

            assertEquals(x, '\u4567', "weakCompareAndSetPlain char value");

        }

        {

            boolean success = false;

            for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {

                success = vh.weakCompareAndSetAcquire(recv, '\u4567', '\u0123');

            }

            assertEquals(success, true, "weakCompareAndSetAcquire char");

            char x = (char) vh.get(recv);

            assertEquals(x, '\u0123', "weakCompareAndSetAcquire char");

        }

        {

            boolean success = false;

            for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {

                success = vh.weakCompareAndSetRelease(recv, '\u0123', '\u4567');