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using ARMeilleure.CodeGen.Linking;
using ARMeilleure.CodeGen.Unwinding;
using ARMeilleure.Translation.Cache;
using System;
using System.Runtime.InteropServices;
namespace ARMeilleure.CodeGen
{
/// <summary>
/// Represents a compiled function.
/// </summary>
readonly struct CompiledFunction
{
/// <summary>
/// Gets the machine code of the <see cref="CompiledFunction"/>.
/// </summary>
public byte[] Code { get; }
/// <summary>
/// Gets the <see cref="Unwinding.UnwindInfo"/> of the <see cref="CompiledFunction"/>.
/// </summary>
public UnwindInfo UnwindInfo { get; }
/// <summary>
/// Gets the <see cref="Linking.RelocInfo"/> of the <see cref="CompiledFunction"/>.
/// </summary>
public RelocInfo RelocInfo { get; }
/// <summary>
/// Initializes a new instance of the <see cref="CompiledFunction"/> struct with the specified machine code,
/// unwind info and relocation info.
/// </summary>
/// <param name="code">Machine code</param>
/// <param name="unwindInfo">Unwind info</param>
/// <param name="relocInfo">Relocation info</param>
internal CompiledFunction(byte[] code, UnwindInfo unwindInfo, RelocInfo relocInfo)
{
Code = code;
UnwindInfo = unwindInfo;
RelocInfo = relocInfo;
}
/// <summary>
/// Maps the <see cref="CompiledFunction"/> onto the <see cref="JitCache"/> and returns a delegate of type
/// <typeparamref name="T"/> pointing to the mapped function.
/// </summary>
/// <typeparam name="T">Type of delegate</typeparam>
/// <returns>A delegate of type <typeparamref name="T"/> pointing to the mapped function</returns>
public T Map<T>()
{
return MapWithPointer<T>(out _);
}
/// <summary>
/// Maps the <see cref="CompiledFunction"/> onto the <see cref="JitCache"/> and returns a delegate of type
/// <typeparamref name="T"/> pointing to the mapped function.
/// </summary>
/// <typeparam name="T">Type of delegate</typeparam>
/// <param name="codePointer">Pointer to the function code in memory</param>
/// <returns>A delegate of type <typeparamref name="T"/> pointing to the mapped function</returns>
public T MapWithPointer<T>(out IntPtr codePointer)
{
codePointer = JitCache.Map(this);
return Marshal.GetDelegateForFunctionPointer<T>(codePointer);
}
}
}
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