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package com.oracle.graal.python.builtins.modules.io;

import static com.oracle.graal.python.builtins.PythonBuiltinClassType.PBufferedRandom;
import static com.oracle.graal.python.builtins.PythonBuiltinClassType.PBufferedWriter;
import static com.oracle.graal.python.builtins.modules.io.IONodes.FLUSH;
import static com.oracle.graal.python.builtins.modules.io.IONodes.WRITABLE;
import static com.oracle.graal.python.builtins.modules.io.IONodes.WRITE;

import java.util.List;

import com.oracle.graal.python.annotations.ArgumentClinic;
import com.oracle.graal.python.builtins.Builtin;
import com.oracle.graal.python.builtins.CoreFunctions;
import com.oracle.graal.python.builtins.modules.io.BufferedIONodes.CheckIsClosedNode;
import com.oracle.graal.python.builtins.modules.io.BufferedIONodes.EnterBufferedNode;
import com.oracle.graal.python.builtins.modules.io.BufferedIONodes.FlushAndRewindUnlockedNode;
import com.oracle.graal.python.builtins.objects.PNone;
import com.oracle.graal.python.builtins.objects.buffer.PythonBufferAccessLibrary;
import com.oracle.graal.python.lib.PyObjectCallMethodObjArgs;
import com.oracle.graal.python.nodes.function.PythonBuiltinBaseNode;
import com.oracle.graal.python.nodes.function.builtins.clinic.ArgumentClinicProvider;
import com.oracle.truffle.api.dsl.Cached;
import com.oracle.truffle.api.dsl.GenerateNodeFactory;
import com.oracle.truffle.api.dsl.ImportStatic;
import com.oracle.truffle.api.dsl.NodeFactory;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.frame.VirtualFrame;
import com.oracle.truffle.api.library.CachedLibrary;

@CoreFunctions(extendClasses = {PBufferedWriter, PBufferedRandom})
public final class BufferedWriterMixinBuiltins extends AbstractBufferedIOBuiltins {
    @Override
    protected List<? extends NodeFactory<? extends PythonBuiltinBaseNode>> getNodeFactories() {
        return BufferedWriterMixinBuiltinsFactory.getFactories();
    }

    @Builtin(name = WRITABLE, minNumOfPositionalArgs = 1)
    @GenerateNodeFactory
    abstract static class WritableNode extends PythonUnaryWithInitErrorBuiltinNode {
        @Specialization(guards = "self.isOK()")
        static Object doit(VirtualFrame frame, PBuffered self,
                        @Cached PyObjectCallMethodObjArgs callMethod) {
            return callMethod.execute(frame, self.getRaw(), WRITABLE);
        }
    }

    @Builtin(name = WRITE, minNumOfPositionalArgs = 1, parameterNames = {"$self", "buffer"})
    @ArgumentClinic(name = "buffer", conversion = ArgumentClinic.ClinicConversion.ReadableBuffer)
    @ImportStatic(IONodes.class)
    @GenerateNodeFactory
    abstract static class WriteNode extends PythonBinaryWithInitErrorClinicBuiltinNode {

        @Specialization(guards = "self.isOK()")
        Object write(@SuppressWarnings("unused") VirtualFrame frame, PBuffered self, Object buffer,
                        @CachedLibrary(limit = "3") PythonBufferAccessLibrary bufferLib,
                        @Cached EnterBufferedNode lock,
                        @Cached("create(WRITE)") CheckIsClosedNode checkIsClosedNode,
                        @Cached BufferedWriterNodes.WriteNode writeNode) {
            try {
                lock.enter(self);
                checkIsClosedNode.execute(frame, self);
                return writeNode.execute(frame, self, buffer);
            } finally {
                bufferLib.release(buffer, frame, this);
                EnterBufferedNode.leave(self);
            }
        }

        @Override
        protected ArgumentClinicProvider getArgumentClinic() {
            return BufferedWriterMixinBuiltinsClinicProviders.WriteNodeClinicProviderGen.INSTANCE;
        }
    }

    @Builtin(name = FLUSH, minNumOfPositionalArgs = 1)
    @ImportStatic(IONodes.class)
    @GenerateNodeFactory
    abstract static class FlushNode extends PythonUnaryWithInitErrorBuiltinNode {

        @Specialization(guards = "self.isOK()")
        static Object doit(VirtualFrame frame, PBuffered self,
                        @Cached EnterBufferedNode lock,
                        @Cached("create(FLUSH)") CheckIsClosedNode checkIsClosedNode,
                        @Cached FlushAndRewindUnlockedNode flushAndRewindUnlockedNode) {
            checkIsClosedNode.execute(frame, self);
            try {
                lock.enter(self);
                flushAndRewindUnlockedNode.execute(frame, self);
            } finally {
                EnterBufferedNode.leave(self);
            }
            return PNone.NONE;
        }
    }
}
