1 | /* |
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2 | * Copyright (c) 2011 Aeroflex Gaisler |
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3 | * |
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4 | * BSD license: |
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5 | * |
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6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
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7 | * of this software and associated documentation files (the "Software"), to deal |
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8 | * in the Software without restriction, including without limitation the rights |
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9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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10 | * copies of the Software, and to permit persons to whom the Software is |
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11 | * furnished to do so, subject to the following conditions: |
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12 | * |
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13 | * The above copyright notice and this permission notice shall be included in |
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14 | * all copies or substantial portions of the Software. |
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15 | * |
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16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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22 | * THE SOFTWARE. |
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23 | */ |
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24 | |
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25 | |
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26 | #include <stddef.h> |
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27 | #include <stdlib.h> |
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28 | #include <reent.h> |
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29 | #include <sys/lock.h> |
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30 | |
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31 | /* |
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32 | * Register a function to be performed at exit or on shared library unload. |
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33 | */ |
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34 | |
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35 | int |
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36 | atexit (void (*fn) (void)) |
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37 | { |
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38 | register struct _atexit *p; |
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39 | |
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40 | p = _GLOBAL_REENT->_atexit; |
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41 | if (p == NULL) |
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42 | _GLOBAL_REENT->_atexit = p = &_GLOBAL_REENT->_atexit0; |
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43 | if (p->_ind >= _ATEXIT_SIZE) |
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44 | { |
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45 | return -1; |
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46 | } |
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47 | |
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48 | p->_fns[p->_ind++] = fn; |
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49 | return 0; |
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50 | } |
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