initializer.h

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// Copyrights(c) 2017-2020, The Electroneum Project
// Copyrights(c) 2014-2019, The Monero Project
// 
// All rights reserved.
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// permitted provided that the following conditions are met:
// 
// 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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//    used to endorse or promote products derived from this software without specific
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
 
#pragma once
 
#if defined(__GNUC__)
#if defined(__sun) && defined(__SVR4)
#define INITIALIZER(name) __attribute__((constructor)) static void name(void)
#define FINALIZER(name) __attribute__((destructor)) static void name(void)
#else
#define INITIALIZER(name) __attribute__((constructor(101))) static void name(void)
#define FINALIZER(name) __attribute__((destructor(101))) static void name(void)
#endif
#define REGISTER_FINALIZER(name) ((void) 0)
 
#elif defined(_MSC_VER)
#include <assert.h>
#include <stdlib.h>
// https://stackoverflow.com/questions/1113409/attribute-constructor-equivalent-in-vc
// https://msdn.microsoft.com/en-us/library/bb918180.aspx
#pragma section(".CRT$XCT", read)
#define INITIALIZER(name) \
  static void __cdecl name(void); \
  __declspec(allocate(".CRT$XCT")) void (__cdecl *const _##name)(void) = &name; \
  static void __cdecl name(void)
#define FINALIZER(name) \
  static void __cdecl name(void)
#define REGISTER_FINALIZER(name) \
  do { \
    int _res = atexit(name); \
    assert(_res == 0); \
  } while (0);
 
#else
#error Unsupported compiler
#endif