(*
 * Copyright (C) 2011-2021 Intel Corporation. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * 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.
 *   * Neither the name of Intel Corporation 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 MERCHANTABILITY AND FITNESS FOR
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 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 *)

(* 
    Dependency injection plugin to allow custom code generation
    from EDL. CodeGen.ml calls into Plugin.available to check 
    if a plugin available. If a plugin is available, then it calls 
    Plugin.gen_edge_routines to generate custom code. 
    Otherwise, it generates code for Intel(R) SGX  SDK.
*)

type plugin = {
    mutable available: bool;
    mutable gen_edge_routines:
         Ast.enclave_content -> Util.edger8r_params -> unit;
}

(* Instance fields will be populated by Open Enclave *)
let instance = {
    available = false;
    gen_edge_routines = fun ec ep -> Printf.printf "Plugin not loaded.\n"
}

let available () = instance.available
let gen_edge_routines ec ep = instance.gen_edge_routines ec ep