/*
 * Copyright (C) 2017 Mentor Graphics Development (Deutschland) GmbH
 *
 * 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.
 */

#ifndef WM_UTIL_HPP
#define WM_UTIL_HPP

#include <functional>
#include <sys/poll.h>

#include <vector>

extern "C" {
#include <afb/afb-binding.h>
};

#ifdef __GNUC__
#define ATTR_FORMAT(stringindex, firsttocheck) \
   __attribute__((format(printf, stringindex, firsttocheck)))
#define ATTR_NORETURN __attribute__((noreturn))
#else
#define ATTR_FORMAT(stringindex, firsttocheck)
#define ATTR_NORETURN
#endif

#define lognotice(...) AFB_NOTICE(__VA_ARGS__)
#define logerror(...) AFB_ERROR(__VA_ARGS__)
#define fatal(...)            \
   do {                       \
      AFB_ERROR(__VA_ARGS__); \
      abort();                \
   } while (0)

#ifdef DEBUG_OUTPUT
#define logdebug(...) AFB_DEBUG(__VA_ARGS__)
#else
#define logdebug(...)
#endif

#ifndef NDEBUG
#define DB(expr)                                                           \
   do {                                                                    \
      std::ostringstream o;                                                \
      o << __FILE__ << ":" << __LINE__ << ":" << __func__ << ": " << expr; \
      logdebug("%s", o.str().c_str());                                     \
   } while (0)
#else
#define DB(expr)
#endif

//      _                   _                 _                       __     _
//  ___| |_ _ __ _   _  ___| |_   _   _ _ __ (_) __ _ _   _  ___     / _| __| |
// / __| __| '__| | | |/ __| __| | | | | '_ \| |/ _` | | | |/ _ \   | |_ / _` |
// \__ \ |_| |  | |_| | (__| |_  | |_| | | | | | (_| | |_| |  __/   |  _| (_| |
// |___/\__|_|   \__,_|\___|\__|  \__,_|_| |_|_|\__, |\__,_|\___|___|_|  \__,_|
//                                                 |_|         |_____|
struct unique_fd {
   int fd{-1};
   unique_fd() = default;
   explicit unique_fd(int f) : fd{f} {}
   operator int() const { return fd; }
   ~unique_fd();
   unique_fd(unique_fd const &) = delete;
   unique_fd &operator=(unique_fd const &) = delete;
   unique_fd(unique_fd &&o) : fd(o.fd) { o.fd = -1; }
   unique_fd &operator=(unique_fd &&o) {
      std::swap(this->fd, o.fd);
      return *this;
   }
};

//      _                   _     ____       _ _
//  ___| |_ _ __ _   _  ___| |_  |  _ \ ___ | | | ___ _ __
// / __| __| '__| | | |/ __| __| | |_) / _ \| | |/ _ \ '__|
// \__ \ |_| |  | |_| | (__| |_  |  __/ (_) | | |  __/ |
// |___/\__|_|   \__,_|\___|\__| |_|   \___/|_|_|\___|_|
//
struct Poller {
   std::vector<std::function<int(int)>> handlers;
   std::vector<struct pollfd> pfds;

   Poller() = default;
   void add_fd(int fd, std::function<int(int)> handler);
   int check_events();
};

#endif  // !WM_UTIL_HPP