/*
 * Copyright (c) 2015, 2015, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * 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,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 */
package com.oracle.graal.lir.phases;

import com.oracle.graal.api.code.*;
import com.oracle.graal.debug.*;
import com.oracle.graal.debug.Debug.Scope;
import com.oracle.graal.debug.DebugMemUseTracker.Closeable;
import com.oracle.graal.debug.internal.*;
import com.oracle.graal.lir.*;
import com.oracle.graal.lir.gen.*;

/**
 * Base class for all {@link LIR low-level} phases. Subclasses should be stateless. There will be
 * one global instance for each phase that is shared for all compilations.
 */
public abstract class LowLevelPhase<C> {

    /**
     * Records time spent within {@link #apply}.
     */
    private final DebugTimer timer;

    /**
     * Records memory usage within {@link #apply}.
     */
    private final DebugMemUseTracker memUseTracker;

    public LowLevelPhase() {
        timer = Debug.timer("LowLevelPhaseTime_%s", getClass());
        memUseTracker = Debug.memUseTracker("LowLevelPhaseMemUse_%s", getClass());
    }

    public void apply(TargetDescription target, LIRGenerationResult lirGenRes, C context) {
        try (TimerCloseable a = timer.start(); Scope s = Debug.scope(getClass(), this); Closeable c = memUseTracker.start()) {
            run(target, lirGenRes, context);
        } catch (Throwable e) {
            throw Debug.handle(e);
        }
    }

    protected abstract void run(TargetDescription target, LIRGenerationResult lirGenRes, C context);
}