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 RTEMSImplClassicTask |
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7 | * |
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8 | * @brief This source file contains the implementation of |
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9 | * rtems_task_resume(). |
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10 | */ |
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11 | |
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12 | /* |
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13 | * COPYRIGHT (c) 1989-2014. |
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14 | * On-Line Applications Research Corporation (OAR). |
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15 | * |
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16 | * Redistribution and use in source and binary forms, with or without |
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17 | * modification, are permitted provided that the following conditions |
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18 | * are met: |
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19 | * 1. Redistributions of source code must retain the above copyright |
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20 | * notice, this list of conditions and the following disclaimer. |
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21 | * 2. Redistributions in binary form must reproduce the above copyright |
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22 | * notice, this list of conditions and the following disclaimer in the |
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23 | * documentation and/or other materials provided with the distribution. |
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24 | * |
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25 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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26 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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27 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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28 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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29 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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30 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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31 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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32 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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33 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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34 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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35 | * POSSIBILITY OF SUCH DAMAGE. |
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36 | */ |
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37 | |
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38 | #ifdef HAVE_CONFIG_H |
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39 | #include "config.h" |
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40 | #endif |
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41 | |
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42 | #include <rtems/rtems/tasksimpl.h> |
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43 | #include <rtems/score/threadimpl.h> |
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44 | |
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45 | rtems_status_code rtems_task_resume( |
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46 | rtems_id id |
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47 | ) |
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48 | { |
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49 | Thread_Control *the_thread; |
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50 | ISR_lock_Context lock_context; |
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51 | Per_CPU_Control *cpu_self; |
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52 | States_Control previous_state; |
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53 | |
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54 | the_thread = _Thread_Get( id, &lock_context ); |
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55 | |
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56 | if ( the_thread == NULL ) { |
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57 | #if defined(RTEMS_MULTIPROCESSING) |
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58 | return _RTEMS_tasks_MP_Resume( id ); |
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59 | #else |
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60 | return RTEMS_INVALID_ID; |
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61 | #endif |
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62 | } |
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63 | |
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64 | cpu_self = _Thread_Dispatch_disable_critical( &lock_context ); |
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65 | _ISR_lock_ISR_enable( &lock_context ); |
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66 | |
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67 | previous_state = _Thread_Clear_state( the_thread, STATES_SUSPENDED ); |
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68 | |
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69 | _Thread_Dispatch_enable( cpu_self ); |
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70 | return _States_Is_suspended( previous_state ) ? |
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71 | RTEMS_SUCCESSFUL : RTEMS_INCORRECT_STATE; |
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72 | } |
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