1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief Canceling Execution of a Thread |
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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 | * Copyright (c) 2016 embedded brains GmbH. |
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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.org/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 <pthread.h> |
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24 | #include <errno.h> |
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25 | |
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26 | #include <rtems/score/isr.h> |
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27 | #include <rtems/score/threadimpl.h> |
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28 | |
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29 | /* |
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30 | * 18.2.1 Canceling Execution of a Thread, P1003.1c/Draft 10, p. 181 |
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31 | */ |
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32 | |
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33 | int pthread_cancel( pthread_t thread ) |
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34 | { |
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35 | Thread_Control *the_thread; |
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36 | ISR_lock_Context lock_context; |
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37 | Thread_Control *executing; |
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38 | Per_CPU_Control *cpu_self; |
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39 | |
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40 | /* |
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41 | * Don't even think about deleting a resource from an ISR. |
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42 | */ |
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43 | |
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44 | if ( _ISR_Is_in_progress() ) { |
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45 | return EPROTO; |
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46 | } |
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47 | |
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48 | the_thread = _Thread_Get( thread, &lock_context ); |
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49 | |
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50 | if ( the_thread == NULL ) { |
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51 | return ESRCH; |
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52 | } |
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53 | |
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54 | cpu_self = _Thread_Dispatch_disable_critical( &lock_context ); |
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55 | _ISR_lock_ISR_enable( &lock_context ); |
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56 | |
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57 | executing = _Per_CPU_Get_executing( cpu_self ); |
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58 | |
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59 | if ( the_thread == executing ) { |
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60 | _Thread_Exit( executing, THREAD_LIFE_TERMINATING, PTHREAD_CANCELED ); |
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61 | } else { |
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62 | _Thread_Cancel( the_thread, executing, PTHREAD_CANCELED ); |
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63 | } |
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64 | |
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65 | _Thread_Dispatch_enable( cpu_self ); |
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66 | return 0; |
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67 | } |
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