1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief RTEMS Task Wake When |
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5 | * @ingroup ClassicTasks |
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6 | */ |
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7 | |
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8 | /* |
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9 | * COPYRIGHT (c) 1989-1999. |
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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.org/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 <rtems/rtems/tasks.h> |
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22 | #include <rtems/rtems/clock.h> |
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23 | #include <rtems/score/threadimpl.h> |
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24 | #include <rtems/score/todimpl.h> |
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25 | #include <rtems/score/watchdogimpl.h> |
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26 | |
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27 | rtems_status_code rtems_task_wake_when( |
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28 | rtems_time_of_day *time_buffer |
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29 | ) |
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30 | { |
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31 | uint32_t seconds; |
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32 | Thread_Control *executing; |
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33 | Per_CPU_Control *cpu_self; |
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34 | |
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35 | if ( !_TOD_Is_set() ) |
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36 | return RTEMS_NOT_DEFINED; |
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37 | |
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38 | if ( !time_buffer ) |
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39 | return RTEMS_INVALID_ADDRESS; |
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40 | |
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41 | time_buffer->ticks = 0; |
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42 | |
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43 | if ( !_TOD_Validate( time_buffer ) ) |
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44 | return RTEMS_INVALID_CLOCK; |
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45 | |
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46 | seconds = _TOD_To_seconds( time_buffer ); |
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47 | |
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48 | if ( seconds <= _TOD_Seconds_since_epoch() ) |
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49 | return RTEMS_INVALID_CLOCK; |
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50 | |
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51 | cpu_self = _Thread_Dispatch_disable(); |
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52 | executing = _Thread_Executing; |
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53 | _Thread_Set_state( executing, STATES_WAITING_FOR_TIME ); |
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54 | _Thread_Wait_flags_set( executing, THREAD_WAIT_STATE_BLOCKED ); |
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55 | _Thread_Timer_insert_absolute( |
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56 | executing, |
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57 | cpu_self, |
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58 | _Thread_Timeout, |
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59 | _Watchdog_Ticks_from_seconds( seconds ) |
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60 | ); |
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61 | _Thread_Dispatch_enable( cpu_self ); |
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62 | return RTEMS_SUCCESSFUL; |
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63 | } |
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