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 * conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of
 * conditions and the following disclaimer in the documentation and/or other materials provided
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 * 3. Neither the name of the copyright holder nor the names of its contributors may be used to
 * endorse or promote products derived from this software without specific prior written
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 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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package com.oracle.truffle.llvm.runtime;

import com.oracle.truffle.api.CompilerDirectives;
import com.oracle.truffle.api.dsl.Cached;
import com.oracle.truffle.api.dsl.GenerateUncached;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.llvm.runtime.memory.LLVMStack;
import com.oracle.truffle.llvm.runtime.memory.LLVMThreadingStack;
import com.oracle.truffle.llvm.runtime.nodes.api.LLVMNode;

@GenerateUncached
public abstract class LLVMGetStackFromThreadNode extends LLVMNode {

    public static LLVMGetStackFromThreadNode create() {
        return LLVMGetStackFromThreadNodeGen.create();
    }

    public abstract LLVMStack executeWithTarget(LLVMThreadingStack threadingStack, Thread currentThread);

    protected LLVMStack getStack(LLVMThreadingStack threadingStack, Thread cachedThread) {
        if (Thread.currentThread() == cachedThread) {
            return threadingStack.getStack();
        }
        CompilerDirectives.transferToInterpreter();
        throw new IllegalStateException();
    }

    
Params:
stack – 
currentThread – 
See Also:
executeWithTarget(LLVMThreadingStack, Thread)/**
     * @param stack
     * @param currentThread
     * @see #executeWithTarget(LLVMThreadingStack, Thread)
     */
    @Specialization(limit = "3", guards = "currentThread == cachedThread", assumptions = "singleContextAssumption()")
    protected LLVMStack cached(LLVMThreadingStack stack, Thread currentThread,
                    @Cached("currentThread") @SuppressWarnings("unused") Thread cachedThread,
                    @Cached("getStack(stack, cachedThread)") LLVMStack cachedStack) {
        return cachedStack;
    }

    
Params:
currentThread – 
See Also:
executeWithTarget(LLVMThreadingStack, Thread)/**
     * @param currentThread
     * @see #executeWithTarget(LLVMThreadingStack, Thread)
     */
    @Specialization(replaces = "cached")
    static LLVMStack generic(LLVMThreadingStack stack, Thread currentThread) {
        return stack.getStack();
    }
}