1 | /* |
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2 | * SuperCore Barrier Handler |
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3 | * |
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4 | * DESCRIPTION: |
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5 | * |
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6 | * This package is part of the implementation of the SuperCore Barrier Handler. |
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7 | * |
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8 | * COPYRIGHT (c) 1989-2006. |
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9 | * On-Line Applications Research Corporation (OAR). |
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10 | * |
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11 | * The license and distribution terms for this file may be |
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12 | * found in the file LICENSE in this distribution or at |
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13 | * http://www.rtems.com/license/LICENSE. |
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14 | * |
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15 | * $Id$ |
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16 | */ |
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17 | |
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18 | #if HAVE_CONFIG_H |
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19 | #include "config.h" |
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20 | #endif |
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21 | |
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22 | #include <rtems/system.h> |
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23 | #include <rtems/score/isr.h> |
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24 | #include <rtems/score/corebarrier.h> |
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25 | #include <rtems/score/states.h> |
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26 | #include <rtems/score/thread.h> |
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27 | #include <rtems/score/threadq.h> |
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28 | |
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29 | /*PAGE |
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30 | * |
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31 | * _CORE_barrier_Wait |
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32 | * |
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33 | * Input parameters: |
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34 | * the_barrier - pointer to barrier control block |
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35 | * id - id of object to wait on |
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36 | * wait - true if wait is allowed, false otherwise |
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37 | * timeout - number of ticks to wait (0 means forever) |
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38 | * api_barrier_mp_support - api dependent MP support actions |
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39 | * |
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40 | * Output parameters: NONE |
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41 | * |
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42 | * INTERRUPT LATENCY: |
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43 | * available |
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44 | * wait |
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45 | */ |
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46 | |
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47 | void _CORE_barrier_Wait( |
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48 | CORE_barrier_Control *the_barrier, |
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49 | Objects_Id id, |
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50 | bool wait, |
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51 | Watchdog_Interval timeout, |
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52 | CORE_barrier_API_mp_support_callout api_barrier_mp_support |
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53 | ) |
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54 | { |
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55 | Thread_Control *executing; |
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56 | ISR_Level level; |
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57 | |
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58 | executing = _Thread_Executing; |
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59 | executing->Wait.return_code = CORE_BARRIER_STATUS_SUCCESSFUL; |
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60 | _ISR_Disable( level ); |
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61 | the_barrier->number_of_waiting_threads++; |
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62 | if ( the_barrier->number_of_waiting_threads == |
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63 | the_barrier->Attributes.maximum_count) { |
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64 | if ( _CORE_barrier_Is_automatic( &the_barrier->Attributes ) ) { |
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65 | executing->Wait.return_code = CORE_BARRIER_STATUS_AUTOMATICALLY_RELEASED; |
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66 | _ISR_Enable( level ); |
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67 | _CORE_barrier_Release( the_barrier, id, api_barrier_mp_support ); |
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68 | return; |
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69 | } |
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70 | } |
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71 | |
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72 | _Thread_queue_Enter_critical_section( &the_barrier->Wait_queue ); |
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73 | executing->Wait.queue = &the_barrier->Wait_queue; |
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74 | executing->Wait.id = id; |
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75 | _ISR_Enable( level ); |
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76 | |
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77 | _Thread_queue_Enqueue( &the_barrier->Wait_queue, timeout ); |
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78 | } |
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