1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief Thread-Specific Data Key Create |
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5 | * @ingroup POSIX_KEY Key |
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6 | */ |
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7 | |
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8 | /* |
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9 | * Copyright (c) 2010 embedded brains GmbH. |
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10 | * |
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11 | * COPYRIGHT (c) 1989-2007. |
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12 | * On-Line Applications Research Corporation (OAR). |
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13 | * |
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14 | * The license and distribution terms for this file may be |
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15 | * found in the file LICENSE in this distribution or at |
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16 | * http://www.rtems.com/license/LICENSE. |
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17 | */ |
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18 | |
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19 | #if HAVE_CONFIG_H |
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20 | #include "config.h" |
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21 | #endif |
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22 | |
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23 | #include <rtems/system.h> |
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24 | #include <rtems/score/thread.h> |
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25 | #include <rtems/posix/key.h> |
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26 | |
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27 | /* |
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28 | * _POSIX_Keys_Run_destructors |
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29 | * |
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30 | * 17.1.1 Thread-Specific Data Key Create, P1003.1c/Draft 10, p. 163 |
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31 | * |
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32 | * NOTE: This is the routine executed when a thread exits to |
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33 | * run through all the keys and do the destructor action. |
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34 | */ |
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35 | |
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36 | void _POSIX_Keys_Run_destructors( |
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37 | Thread_Control *thread |
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38 | ) |
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39 | { |
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40 | Objects_Maximum thread_index = _Objects_Get_index( thread->Object.id ); |
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41 | Objects_APIs thread_api = _Objects_Get_API( thread->Object.id ); |
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42 | bool done = false; |
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43 | |
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44 | /* |
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45 | * The standard allows one to avoid a potential infinite loop and limit the |
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46 | * number of iterations. An infinite loop may happen if destructors set |
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47 | * thread specific data. This can be considered dubious. |
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48 | * |
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49 | * Reference: 17.1.1.2 P1003.1c/Draft 10, p. 163, line 99. |
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50 | */ |
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51 | while ( !done ) { |
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52 | Objects_Maximum index = 0; |
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53 | Objects_Maximum max = _POSIX_Keys_Information.maximum; |
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54 | |
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55 | done = true; |
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56 | |
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57 | for ( index = 1 ; index <= max ; ++index ) { |
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58 | POSIX_Keys_Control *key = (POSIX_Keys_Control *) |
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59 | _POSIX_Keys_Information.local_table [ index ]; |
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60 | |
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61 | if ( key != NULL && key->destructor != NULL ) { |
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62 | void *value = key->Values [ thread_api ][ thread_index ]; |
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63 | |
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64 | if ( value != NULL ) { |
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65 | key->Values [ thread_api ][ thread_index ] = NULL; |
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66 | (*key->destructor)( value ); |
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67 | done = false; |
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68 | } |
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69 | } |
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70 | } |
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71 | } |
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72 | } |
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