4.104.115
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1 | /* |
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2 | * POSIX Spinlock Manager -- Wait at a Spinlock |
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3 | * |
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4 | * COPYRIGHT (c) 1989-2007. |
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5 | * On-Line Applications Research Corporation (OAR). |
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6 | * |
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7 | * The license and distribution terms for this file may be |
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8 | * found in the file LICENSE in this distribution or at |
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9 | * http://www.rtems.com/license/LICENSE. |
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10 | * |
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11 | * $Id$ |
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12 | */ |
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13 | |
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14 | #if HAVE_CONFIG_H |
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15 | #include "config.h" |
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16 | #endif |
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17 | |
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18 | #include <pthread.h> |
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19 | #include <errno.h> |
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20 | |
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21 | #include <rtems/system.h> |
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22 | #include <rtems/posix/spinlock.h> |
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23 | |
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24 | /* |
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25 | * pthread_spin_lock |
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26 | * |
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27 | * This directive allows a thread to wait at a spinlock. |
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28 | * |
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29 | * Input parameters: |
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30 | * spinlock - spinlock id |
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31 | * |
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32 | * Output parameters: |
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33 | * 0 - if successful |
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34 | * error code - if unsuccessful |
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35 | */ |
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36 | |
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37 | int pthread_spin_lock( |
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38 | pthread_spinlock_t *spinlock |
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39 | ) |
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40 | { |
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41 | POSIX_Spinlock_Control *the_spinlock = NULL; |
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42 | Objects_Locations location; |
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43 | CORE_spinlock_Status status; |
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44 | |
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45 | if ( !spinlock ) |
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46 | return EINVAL; |
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47 | |
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48 | the_spinlock = _POSIX_Spinlock_Get( spinlock, &location ); |
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49 | switch ( location ) { |
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50 | |
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51 | case OBJECTS_LOCAL: |
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52 | status = _CORE_spinlock_Wait( &the_spinlock->Spinlock, true, 0 ); |
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53 | _Thread_Enable_dispatch(); |
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54 | return _POSIX_Spinlock_Translate_core_spinlock_return_code( status ); |
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55 | |
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56 | #if defined(RTEMS_MULTIPROCESSING) |
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57 | case OBJECTS_REMOTE: |
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58 | #endif |
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59 | case OBJECTS_ERROR: |
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60 | break; |
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61 | } |
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62 | |
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63 | return EINVAL; |
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64 | } |
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