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 * permitted provided that the following conditions are met:
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 * 1. Redistributions of source code must retain the above copyright notice, this list of
 * 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
 * with the distribution.
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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
 * permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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package com.oracle.truffle.llvm.runtime.memory;

import com.oracle.truffle.llvm.runtime.LLVMAddress;

public final class LLVMHeap extends LLVMMemory {

    public static LLVMAddress allocateCString(String string) {
        LLVMAddress baseAddress = LLVMMemory.allocateMemory(string.length() + 1);
        long currentAddress = baseAddress.getVal();
        for (int i = 0; i < string.length(); i++) {
            byte c = (byte) string.charAt(i);
            LLVMMemory.putI8(currentAddress, c);
            currentAddress++;
        }
        LLVMMemory.putI8(currentAddress, (byte) 0);
        return baseAddress;
    }

    // current hack: we cannot directly store the LLVMFunction in the native memory due to GC
    public static final int FUNCTION_PTR_SIZE_BYTE = 8;

    public static void putFunctionPointer(LLVMAddress address, long functionIndex) {
        UNSAFE.putLong(LLVMMemory.extractAddr(address), functionIndex);
    }

    public static void putFunctionPointer(long ptr, long functionIndex) {
        assert ptr != 0;
        UNSAFE.putLong(ptr, functionIndex);
    }

    public static long getFunctionPointer(LLVMAddress addr) {
        long functionIndex = UNSAFE.getLong(LLVMMemory.extractAddr(addr));
        return functionIndex;
    }

}