1 | /* macros/coresem.h |
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2 | * |
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3 | * This include file contains all of the inlined routines associated |
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4 | * with core semaphores. |
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5 | * |
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6 | * COPYRIGHT (c) 1989-1999. |
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7 | * On-Line Applications Research Corporation (OAR). |
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8 | * |
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9 | * The license and distribution terms for this file may be |
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10 | * found in the file LICENSE in this distribution or at |
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11 | * http://www.OARcorp.com/rtems/license.html. |
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12 | * |
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13 | * $Id$ |
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14 | */ |
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15 | |
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16 | #ifndef __MACROS_CORE_SEMAPHORE_h |
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17 | #define __MACROS_CORE_SEMAPHORE_h |
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18 | |
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19 | /*PAGE |
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20 | * |
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21 | * _CORE_semaphore_Is_priority |
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22 | * |
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23 | */ |
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24 | |
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25 | #define _CORE_semaphore_Is_priority( _the_attribute ) \ |
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26 | ( (_the_attribute)->discipline == CORE_SEMAPHORE_DISCIPLINES_PRIORITY ) |
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27 | |
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28 | /*PAGE |
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29 | * |
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30 | * _CORE_semaphore_Get_count |
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31 | * |
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32 | */ |
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33 | |
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34 | #define _CORE_semaphore_Get_count( _the_semaphore ) \ |
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35 | ( (_the_semaphore)->count ) |
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36 | |
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37 | /*PAGE |
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38 | * |
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39 | * _CORE_semaphore_Seize_isr_disable |
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40 | */ |
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41 | |
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42 | #define _CORE_semaphore_Seize_isr_disable( \ |
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43 | _the_semaphore, _id, _wait, _timeout, _level_p) \ |
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44 | { \ |
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45 | Thread_Control *executing; \ |
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46 | ISR_Level level = *(_level_p); \ |
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47 | \ |
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48 | /* disabled when you get here */ \ |
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49 | \ |
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50 | executing = _Thread_Executing; \ |
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51 | executing->Wait.return_code = CORE_SEMAPHORE_STATUS_SUCCESSFUL; \ |
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52 | if ( (_the_semaphore)->count != 0 ) { \ |
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53 | (_the_semaphore)->count -= 1; \ |
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54 | _ISR_Enable( level ); \ |
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55 | } else if ( !(_wait) ) { \ |
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56 | _ISR_Enable( level ); \ |
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57 | executing->Wait.return_code = CORE_SEMAPHORE_STATUS_UNSATISFIED_NOWAIT; \ |
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58 | } else { \ |
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59 | _Thread_Disable_dispatch(); \ |
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60 | _Thread_queue_Enter_critical_section( &(_the_semaphore)->Wait_queue ); \ |
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61 | executing->Wait.queue = &(_the_semaphore)->Wait_queue; \ |
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62 | executing->Wait.id = (_id); \ |
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63 | _ISR_Enable( level ); \ |
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64 | \ |
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65 | _Thread_queue_Enqueue( &(_the_semaphore)->Wait_queue, (_timeout) ); \ |
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66 | _Thread_Enable_dispatch(); \ |
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67 | } \ |
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68 | } |
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69 | |
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70 | #endif |
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71 | /* end of include file */ |
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