1 | /* |
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2 | * COPYRIGHT (c) 1989-2008. |
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3 | * On-Line Applications Research Corporation (OAR). |
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4 | * |
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5 | * The license and distribution terms for this file may be |
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6 | * found in the file LICENSE in this distribution or at |
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7 | * http://www.rtems.com/license/LICENSE. |
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8 | * |
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9 | * $Id$ |
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10 | */ |
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11 | |
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12 | #if HAVE_CONFIG_H |
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13 | #include "config.h" |
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14 | #endif |
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15 | |
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16 | #include <pthread.h> |
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17 | #include <errno.h> |
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18 | |
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19 | #include <rtems/system.h> |
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20 | #include <rtems/score/chain.h> |
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21 | #include <rtems/score/isr.h> |
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22 | #include <rtems/score/thread.h> |
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23 | #include <rtems/score/wkspace.h> |
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24 | #include <rtems/posix/cancel.h> |
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25 | #include <rtems/posix/pthread.h> |
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26 | #include <rtems/posix/threadsup.h> |
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27 | |
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28 | /*PAGE |
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29 | * |
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30 | * 18.2.2 Setting Cancelability State, P1003.1c/Draft 10, p. 183 |
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31 | */ |
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32 | |
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33 | int pthread_setcancelstate( |
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34 | int state, |
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35 | int *oldstate |
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36 | ) |
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37 | { |
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38 | POSIX_API_Control *thread_support; |
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39 | bool cancel = false; |
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40 | |
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41 | /* |
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42 | * Don't even think about deleting a resource from an ISR. |
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43 | * Besides this request is supposed to be for _Thread_Executing |
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44 | * and the ISR context is not a thread. |
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45 | */ |
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46 | |
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47 | if ( _ISR_Is_in_progress() ) |
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48 | return EPROTO; |
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49 | |
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50 | if ( !oldstate ) |
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51 | return EINVAL; |
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52 | |
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53 | if ( state != PTHREAD_CANCEL_ENABLE && state != PTHREAD_CANCEL_DISABLE ) |
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54 | return EINVAL; |
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55 | |
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56 | thread_support = _Thread_Executing->API_Extensions[ THREAD_API_POSIX ]; |
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57 | |
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58 | _Thread_Disable_dispatch(); |
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59 | *oldstate = thread_support->cancelability_state; |
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60 | thread_support->cancelability_state = state; |
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61 | |
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62 | if ( thread_support->cancelability_state == PTHREAD_CANCEL_ENABLE && |
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63 | thread_support->cancelability_type == PTHREAD_CANCEL_ASYNCHRONOUS && |
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64 | thread_support->cancelation_requested ) |
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65 | cancel = true; |
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66 | |
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67 | _Thread_Enable_dispatch(); |
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68 | if ( cancel ) |
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69 | _POSIX_Thread_Exit( _Thread_Executing, PTHREAD_CANCELED ); |
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70 | return 0; |
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71 | } |
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