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1 /****************************************************************************
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2 * *
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3 * GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS *
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4 * *
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5 * E R R N O *
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6 * *
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7 * C Implementation File *
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8 * *
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9 * Copyright (C) 1992-2012, Free Software Foundation, Inc. *
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10 * *
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11 * GNAT is free software; you can redistribute it and/or modify it under *
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12 * terms of the GNU General Public License as published by the Free Soft- *
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13 * ware Foundation; either version 3, or (at your option) any later ver- *
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14 * sion. GNAT is distributed in the hope that it will be useful, but WITH- *
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15 * OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY *
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16 * or FITNESS FOR A PARTICULAR PURPOSE. *
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17 * *
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18 * As a special exception under Section 7 of GPL version 3, you are granted *
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19 * additional permissions described in the GCC Runtime Library Exception, *
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20 * version 3.1, as published by the Free Software Foundation. *
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21 * *
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22 * You should have received a copy of the GNU General Public License and *
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23 * a copy of the GCC Runtime Library Exception along with this program; *
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24 * see the files COPYING3 and COPYING.RUNTIME respectively. If not, see *
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25 * <http://www.gnu.org/licenses/>. *
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26 * *
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27 * GNAT was originally developed by the GNAT team at New York University. *
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28 * Extensive contributions were provided by Ada Core Technologies Inc. *
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29 * *
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30 ****************************************************************************/
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31
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32 /* This file provides access to the C-language errno to the Ada interface
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33 for POSIX. It is not possible in general to import errno, even in
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34 Ada compilers that allow (as GNAT does) the importation of variables,
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35 as it may be defined using a macro.
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36 */
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37
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38
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39 #define _REENTRANT
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40 #define _THREAD_SAFE
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41
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42 #ifdef MaRTE
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43
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44 /* MaRTE OS provides its own implementation of errno related functionality. We
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45 want to ensure the use of the MaRTE version for tasking programs (the MaRTE
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46 library will not be linked if no tasking constructs are used), so we use the
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47 weak symbols mechanism to use the MaRTE version whenever is available. */
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48
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49 #pragma weak __get_errno
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50 #pragma weak __set_errno
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51
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52 #endif
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53
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54 #include <errno.h>
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55 int
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56 __get_errno(void)
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57 {
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58 return errno;
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59 }
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60
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61 #ifndef __ANDROID__
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62 void
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63 __set_errno(int err)
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64 {
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65 errno = err;
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66 }
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67 #endif
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