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/*
* Copyright 2010 Luca Barbieri
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
#ifndef U_INIT_H
#define U_INIT_H
/* Use UTIL_INIT(f) to have f called at program initialization.
Note that it is only guaranteed to be called if any symbol in the
.c file it is in sis referenced by the program.
UTIL_INIT functions are called in arbitrary order.
*/
#ifdef __cplusplus
/* use a C++ global constructor */
#define UTIL_INIT(f) struct f##__gctor_t {f##__gctor_t() {x();}} f##__gctor;
#elif defined(_MSC_VER)
/* add a pointer to the section where MSVC stores global constructor pointers */
/* see http://blogs.msdn.com/vcblog/archive/2006/10/20/crt-initialization.aspx and
http://stackoverflow.com/questions/1113409/attribute-constructor-equivalent-in-vc */
#pragma data_seg(".CRT$XCU")
#define UTIL_INIT(f) static void __cdecl f##__init(void) {f();}; __declspec(allocate(".CRT$XCU")) void (__cdecl* f##__xcu)(void) = f##__init;
#elif defined(__GNUC__)
#define UTIL_INIT(f) static void f##__init(void) __attribute__((constructor)); static void f##__init(void) {f();}
#else
#error Unsupported compiler: please find out how to implement global initializers in C on it
#endif
#endif
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