1 | /* |
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2 | * COPYRIGHT (c) 1989-2007. |
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3 | * On-Line Applications Research Corporation (OAR). |
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4 | * |
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5 | * The license and distribution terms for this file may be |
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6 | * found in the file LICENSE in this distribution or at |
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7 | * http://www.rtems.com/license/LICENSE. |
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8 | * |
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9 | * $Id$ |
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10 | */ |
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11 | |
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12 | #if HAVE_CONFIG_H |
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13 | #include "config.h" |
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14 | #endif |
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15 | |
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16 | #include <pthread.h> |
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17 | #include <errno.h> |
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18 | |
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19 | #include <rtems/system.h> |
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20 | #include <rtems/score/object.h> |
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21 | #include <rtems/score/states.h> |
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22 | #include <rtems/score/watchdog.h> |
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23 | #include <rtems/posix/cond.h> |
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24 | #include <rtems/posix/time.h> |
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25 | #include <rtems/posix/mutex.h> |
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26 | |
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27 | /*PAGE |
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28 | * |
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29 | * 11.4.2 Initializing and Destroying a Condition Variable, |
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30 | * P1003.1c/Draft 10, p. 87 |
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31 | */ |
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32 | |
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33 | int pthread_cond_init( |
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34 | pthread_cond_t *cond, |
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35 | const pthread_condattr_t *attr |
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36 | ) |
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37 | { |
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38 | POSIX_Condition_variables_Control *the_cond; |
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39 | const pthread_condattr_t *the_attr; |
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40 | |
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41 | if ( attr ) the_attr = attr; |
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42 | else the_attr = &_POSIX_Condition_variables_Default_attributes; |
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43 | |
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44 | /* |
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45 | * Be careful about attributes when global!!! |
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46 | */ |
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47 | if ( the_attr->process_shared == PTHREAD_PROCESS_SHARED ) |
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48 | return EINVAL; |
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49 | |
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50 | if ( !the_attr->is_initialized ) |
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51 | return EINVAL; |
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52 | |
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53 | _Thread_Disable_dispatch(); |
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54 | |
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55 | the_cond = _POSIX_Condition_variables_Allocate(); |
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56 | |
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57 | if ( !the_cond ) { |
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58 | _Thread_Enable_dispatch(); |
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59 | return ENOMEM; |
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60 | } |
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61 | |
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62 | the_cond->process_shared = the_attr->process_shared; |
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63 | |
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64 | the_cond->Mutex = POSIX_CONDITION_VARIABLES_NO_MUTEX; |
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65 | |
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66 | _Thread_queue_Initialize( |
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67 | &the_cond->Wait_queue, |
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68 | THREAD_QUEUE_DISCIPLINE_FIFO, |
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69 | STATES_WAITING_FOR_CONDITION_VARIABLE | STATES_INTERRUPTIBLE_BY_SIGNAL, |
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70 | ETIMEDOUT |
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71 | ); |
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72 | |
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73 | _Objects_Open_u32( |
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74 | &_POSIX_Condition_variables_Information, |
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75 | &the_cond->Object, |
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76 | 0 |
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77 | ); |
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78 | |
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79 | *cond = the_cond->Object.id; |
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80 | |
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81 | _Thread_Enable_dispatch(); |
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82 | |
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83 | return 0; |
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84 | } |
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