[a0e6c73] | 1 | /** |
---|
| 2 | * @file |
---|
| 3 | * |
---|
| 4 | * @brief Create a Per-Process Timer |
---|
| 5 | * @ingroup POSIX_PRIV_TIMERS Timers |
---|
| 6 | */ |
---|
| 7 | |
---|
[a6cbc9b] | 8 | /* |
---|
| 9 | * 14.2.2 Create a Per-Process Timer, P1003.1b-1993, p. 264 |
---|
| 10 | * |
---|
| 11 | * COPYRIGHT (c) 1989-2007. |
---|
| 12 | * On-Line Applications Research Corporation (OAR). |
---|
| 13 | * |
---|
| 14 | * The license and distribution terms for this file may be |
---|
| 15 | * found in the file LICENSE in this distribution or at |
---|
[c499856] | 16 | * http://www.rtems.org/license/LICENSE. |
---|
[a6cbc9b] | 17 | */ |
---|
| 18 | |
---|
| 19 | #if HAVE_CONFIG_H |
---|
| 20 | #include "config.h" |
---|
| 21 | #endif |
---|
| 22 | |
---|
| 23 | #include <time.h> |
---|
| 24 | #include <errno.h> |
---|
| 25 | #include <signal.h> |
---|
| 26 | |
---|
[f9340ed7] | 27 | #include <rtems/posix/sigset.h> |
---|
[f17c779] | 28 | #include <rtems/posix/timerimpl.h> |
---|
[21275b58] | 29 | #include <rtems/score/thread.h> |
---|
[4b48ece0] | 30 | #include <rtems/score/watchdogimpl.h> |
---|
[21275b58] | 31 | #include <rtems/seterr.h> |
---|
| 32 | #include <rtems/sysinit.h> |
---|
[a6cbc9b] | 33 | |
---|
| 34 | int timer_create( |
---|
| 35 | clockid_t clock_id, |
---|
[ad36dc2c] | 36 | struct sigevent *__restrict evp, |
---|
| 37 | timer_t *__restrict timerid |
---|
[a6cbc9b] | 38 | ) |
---|
| 39 | { |
---|
| 40 | POSIX_Timer_Control *ptimer; |
---|
| 41 | |
---|
| 42 | if ( clock_id != CLOCK_REALTIME ) |
---|
| 43 | rtems_set_errno_and_return_minus_one( EINVAL ); |
---|
[1de949a8] | 44 | |
---|
[a6cbc9b] | 45 | if ( !timerid ) |
---|
| 46 | rtems_set_errno_and_return_minus_one( EINVAL ); |
---|
[1de949a8] | 47 | |
---|
[a6cbc9b] | 48 | /* |
---|
| 49 | * The data of the structure evp are checked in order to verify if they |
---|
| 50 | * are coherent. |
---|
| 51 | */ |
---|
| 52 | |
---|
| 53 | if (evp != NULL) { |
---|
| 54 | /* The structure has data */ |
---|
| 55 | if ( ( evp->sigev_notify != SIGEV_NONE ) && |
---|
| 56 | ( evp->sigev_notify != SIGEV_SIGNAL ) ) { |
---|
| 57 | /* The value of the field sigev_notify is not valid */ |
---|
| 58 | rtems_set_errno_and_return_minus_one( EINVAL ); |
---|
| 59 | } |
---|
| 60 | |
---|
| 61 | if ( !evp->sigev_signo ) |
---|
| 62 | rtems_set_errno_and_return_minus_one( EINVAL ); |
---|
| 63 | |
---|
| 64 | if ( !is_valid_signo(evp->sigev_signo) ) |
---|
| 65 | rtems_set_errno_and_return_minus_one( EINVAL ); |
---|
| 66 | } |
---|
| 67 | |
---|
| 68 | /* |
---|
| 69 | * Allocate a timer |
---|
| 70 | */ |
---|
| 71 | ptimer = _POSIX_Timer_Allocate(); |
---|
| 72 | if ( !ptimer ) { |
---|
[23fec9f0] | 73 | _Objects_Allocator_unlock(); |
---|
[a6cbc9b] | 74 | rtems_set_errno_and_return_minus_one( EAGAIN ); |
---|
| 75 | } |
---|
| 76 | |
---|
| 77 | /* The data of the created timer are stored to use them later */ |
---|
| 78 | |
---|
| 79 | ptimer->state = POSIX_TIMER_STATE_CREATE_NEW; |
---|
[23fec9f0] | 80 | ptimer->thread_id = _Thread_Get_executing()->Object.id; |
---|
[a6cbc9b] | 81 | |
---|
| 82 | if ( evp != NULL ) { |
---|
| 83 | ptimer->inf.sigev_notify = evp->sigev_notify; |
---|
| 84 | ptimer->inf.sigev_signo = evp->sigev_signo; |
---|
| 85 | ptimer->inf.sigev_value = evp->sigev_value; |
---|
| 86 | } |
---|
| 87 | |
---|
| 88 | ptimer->overrun = 0; |
---|
| 89 | ptimer->timer_data.it_value.tv_sec = 0; |
---|
| 90 | ptimer->timer_data.it_value.tv_nsec = 0; |
---|
| 91 | ptimer->timer_data.it_interval.tv_sec = 0; |
---|
| 92 | ptimer->timer_data.it_interval.tv_nsec = 0; |
---|
| 93 | |
---|
[03b900d] | 94 | _Watchdog_Preinitialize( &ptimer->Timer, _Per_CPU_Get_snapshot() ); |
---|
| 95 | _Watchdog_Initialize( &ptimer->Timer, _POSIX_Timer_TSR ); |
---|
[ce19f1fa] | 96 | _Objects_Open_u32(&_POSIX_Timer_Information, &ptimer->Object, 0); |
---|
[a6cbc9b] | 97 | |
---|
| 98 | *timerid = ptimer->Object.id; |
---|
[23fec9f0] | 99 | _Objects_Allocator_unlock(); |
---|
[a6cbc9b] | 100 | return 0; |
---|
| 101 | } |
---|
[21275b58] | 102 | |
---|
| 103 | static void _POSIX_Timer_Manager_initialization( void ) |
---|
| 104 | { |
---|
| 105 | _Objects_Initialize_information( &_POSIX_Timer_Information ); |
---|
| 106 | } |
---|
| 107 | |
---|
| 108 | RTEMS_SYSINIT_ITEM( |
---|
| 109 | _POSIX_Timer_Manager_initialization, |
---|
| 110 | RTEMS_SYSINIT_POSIX_TIMER, |
---|
| 111 | RTEMS_SYSINIT_ORDER_MIDDLE |
---|
| 112 | ); |
---|