/*
 * Copyright (C) 2023 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "berberis/runtime_primitives/known_guest_function_wrapper.h"

#include <map>
#include <mutex>
#include <string>

#include "berberis/guest_state/guest_addr.h"
#include "berberis/runtime_primitives/host_code.h"

namespace berberis {

namespace {

std::map<std::string, HostCode (*)(GuestAddr)> g_function_wrappers;
std::mutex g_guard_mutex;

}  // namespace

void RegisterKnownGuestFunctionWrapper(const char* name, HostCode (*wrapper)(GuestAddr)) {
  std::lock_guard<std::mutex> guard(g_guard_mutex);
  g_function_wrappers.insert({name, wrapper});
}

HostCode WrapKnownGuestFunction(GuestAddr guest_addr, const char* name) {
  std::lock_guard<std::mutex> guard(g_guard_mutex);
  auto wrapper = g_function_wrappers.find(name);
  if (wrapper == end(g_function_wrappers)) {
    return nullptr;
  }
  return wrapper->second(guest_addr);
}

};  // namespace berberis