1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief Establishing Cancellation Handlers |
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5 | * @ingroup POSIXAPI |
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6 | */ |
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7 | |
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8 | /* |
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9 | * COPYRIGHT (c) 1989-2008. |
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10 | * On-Line Applications Research Corporation (OAR). |
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11 | * |
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12 | * The license and distribution terms for this file may be |
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13 | * found in the file LICENSE in this distribution or at |
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14 | * http://www.rtems.com/license/LICENSE. |
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15 | */ |
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16 | |
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17 | #if HAVE_CONFIG_H |
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18 | #include "config.h" |
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19 | #endif |
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20 | |
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21 | #include <pthread.h> |
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22 | #include <errno.h> |
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23 | |
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24 | #include <rtems/system.h> |
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25 | #include <rtems/score/chain.h> |
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26 | #include <rtems/score/isr.h> |
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27 | #include <rtems/score/thread.h> |
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28 | #include <rtems/score/wkspace.h> |
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29 | #include <rtems/posix/cancel.h> |
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30 | #include <rtems/posix/pthreadimpl.h> |
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31 | #include <rtems/posix/threadsup.h> |
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32 | |
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33 | /* |
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34 | * 18.2.3.1 Establishing Cancellation Handlers, P1003.1c/Draft 10, p. 184 |
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35 | */ |
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36 | |
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37 | void pthread_cleanup_push( |
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38 | void (*routine)( void * ), |
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39 | void *arg |
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40 | ) |
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41 | { |
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42 | POSIX_Cancel_Handler_control *handler; |
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43 | Chain_Control *handler_stack; |
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44 | POSIX_API_Control *thread_support; |
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45 | |
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46 | /* |
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47 | * The POSIX standard does not address what to do when the routine |
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48 | * is NULL. It also does not address what happens when we cannot |
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49 | * allocate memory or anything else bad happens. |
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50 | */ |
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51 | if ( !routine ) |
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52 | return; |
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53 | |
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54 | _Thread_Disable_dispatch(); |
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55 | handler = _Workspace_Allocate( sizeof( POSIX_Cancel_Handler_control ) ); |
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56 | |
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57 | if ( handler ) { |
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58 | thread_support = _Thread_Executing->API_Extensions[ THREAD_API_POSIX ]; |
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59 | |
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60 | handler_stack = &thread_support->Cancellation_Handlers; |
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61 | |
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62 | handler->routine = routine; |
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63 | handler->arg = arg; |
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64 | |
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65 | _Chain_Append( handler_stack, &handler->Node ); |
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66 | } |
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67 | _Thread_Enable_dispatch(); |
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68 | } |
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