1 | /* SPDX-License-Identifier: BSD-2-Clause */ |
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2 | |
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3 | /** |
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4 | * @file |
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5 | * |
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6 | * @ingroup POSIXAPI |
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7 | * |
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8 | * @brief Canceling Execution of a Thread |
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9 | */ |
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10 | |
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11 | /* |
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12 | * COPYRIGHT (c) 1989-2008. |
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13 | * On-Line Applications Research Corporation (OAR). |
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14 | * |
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15 | * Copyright (c) 2016 embedded brains GmbH & Co. KG |
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16 | * |
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17 | * Redistribution and use in source and binary forms, with or without |
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18 | * modification, are permitted provided that the following conditions |
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19 | * are met: |
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20 | * 1. Redistributions of source code must retain the above copyright |
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21 | * notice, this list of conditions and the following disclaimer. |
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22 | * 2. Redistributions in binary form must reproduce the above copyright |
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23 | * notice, this list of conditions and the following disclaimer in the |
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24 | * documentation and/or other materials provided with the distribution. |
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25 | * |
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26 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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27 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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28 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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29 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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30 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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31 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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32 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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33 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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34 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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35 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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36 | * POSSIBILITY OF SUCH DAMAGE. |
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37 | */ |
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38 | |
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39 | #ifdef HAVE_CONFIG_H |
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40 | #include "config.h" |
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41 | #endif |
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42 | |
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43 | #include <pthread.h> |
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44 | #include <errno.h> |
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45 | |
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46 | #include <rtems/score/isr.h> |
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47 | #include <rtems/score/threadimpl.h> |
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48 | |
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49 | /* |
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50 | * 18.2.1 Canceling Execution of a Thread, P1003.1c/Draft 10, p. 181 |
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51 | */ |
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52 | |
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53 | int pthread_cancel( pthread_t thread ) |
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54 | { |
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55 | Thread_Control *the_thread; |
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56 | ISR_lock_Context lock_context; |
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57 | Thread_Control *executing; |
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58 | Per_CPU_Control *cpu_self; |
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59 | |
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60 | the_thread = _Thread_Get( thread, &lock_context ); |
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61 | |
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62 | if ( the_thread == NULL ) { |
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63 | return ESRCH; |
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64 | } |
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65 | |
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66 | cpu_self = _Per_CPU_Get(); |
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67 | executing = _Per_CPU_Get_executing( cpu_self ); |
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68 | |
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69 | if ( |
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70 | the_thread == executing && |
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71 | !_Per_CPU_Is_ISR_in_progress( cpu_self ) |
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72 | ) { |
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73 | _ISR_lock_ISR_enable( &lock_context ); |
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74 | _Thread_Exit( PTHREAD_CANCELED, THREAD_LIFE_TERMINATING ); |
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75 | } else { |
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76 | _Thread_Dispatch_disable_with_CPU( cpu_self, &lock_context ); |
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77 | _ISR_lock_ISR_enable( &lock_context ); |
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78 | (void) _Thread_Cancel( the_thread, executing, 0 ); |
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79 | _Thread_Dispatch_enable( cpu_self ); |
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80 | } |
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81 | return 0; |
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82 | } |
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