flight/libraries/mini_cpp.cpp

   1 /**
   2  ******************************************************************************
   3  * @addtogroup PIOS PIOS Core hardware abstraction layer
   4  * @{
   5  *
   6  * @file       mini_cpp.cpp
   7  * @author     The OpenPilot Team, http://www.openpilot.org Copyright (C) 2014.
   8  * @brief      CPP support methods
   9  * @see        The GNU Public License (GPL) Version 3
  10  *
  11  *****************************************************************************/
  12 /*
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 3 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful, but
  19  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  20  * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
  21  * for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License along
  24  * with this program; if not, write to the Free Software Foundation, Inc.,
  25  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  26  */
  27
  28 #include <pios.h>
  29
  30 // _init is called by __libc_init_array during invocation of static constructors
  31 // __libc_init_array calls _init, which is defined in crti.o. _init calls functions that are in .init section.
  32 // If you don't have meaningful stuff in .init section, just define an empty _init function.
  33 extern "C" int _init(void)
  34 {
  35     return 0;
  36 }
  37
  38
  39 // operator new
  40 void *operator new(size_t size) throw()
  41 {
  42     return pios_malloc(size);
  43 }
  44
  45 // operator delete
  46 void operator delete(void *p) throw()
  47 {
  48     pios_free(p);
  49 }
  50
  51 // The function __aeabi_atexit() handles the static destructors.  This can be empty
  52 // because we have no operating system to return to, hence the static destructors
  53 // will never be called.
  54 extern "C" int __aeabi_atexit(__attribute__((unused)) void *object, __attribute__((unused)) void (*destructor)(void *), __attribute__((unused)) void *dso_handle)
  55 {
  56     return 0;
  57 }
  58
  59 // see https://answers.launchpad.net/gcc-arm-embedded/+question/221105
  60 // and https://answers.launchpad.net/gcc-arm-embedded/+question/224709
  61 __extension__ typedef int __guard __attribute__((mode(__DI__)));
  62 extern "C" int __cxa_atexit(void (*f)(void *), void *p, void *d);
  63 extern "C" int __cxa_guard_acquire(__guard *);
  64 extern "C" void __cxa_guard_release(__guard *);
  65 extern "C" void __cxa_guard_abort(__guard *);
  66 extern "C" void __cxa_pure_virtual(void);
  67
  68 int __cxa_guard_acquire(__attribute__((unused)) __guard *g)
  69 {
  70     return !*(char *)(g);
  71 };
  72 void __cxa_guard_release(__attribute__((unused)) __guard *g)
  73 {
  74     *(char *)g = 1;
  75 };
  76 void __cxa_guard_abort(__attribute__((unused)) __guard *) {};
  77 void __cxa_pure_virtual(void)
  78 {
  79     while (1) {
  80         ;
  81     }
  82 }
  83 int __cxa_atexit(__attribute__((unused)) void (*f)(void *), __attribute__((unused)) void *p, __attribute__((unused)) void *d)
  84 {
  85     return 0;
  86 };
  87 /**
  88  * @}
  89  */