[07d880f4] | 1 | /* |
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| 2 | * 3.4.1 Schedule Alarm, P1003.1b-1993, p. 79 |
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[412dbff6] | 3 | */ |
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| 4 | |
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| 5 | /* COPYRIGHT (c) 1989-2007. |
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[07d880f4] | 6 | * On-Line Applications Research Corporation (OAR). |
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| 7 | * |
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| 8 | * The license and distribution terms for this file may be |
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| 9 | * found in the file LICENSE in this distribution or at |
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[8e36f29] | 10 | * http://www.rtems.com/license/LICENSE. |
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[07d880f4] | 11 | * |
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| 12 | * $Id$ |
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| 13 | */ |
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| 14 | |
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[f42b726] | 15 | #if HAVE_CONFIG_H |
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| 16 | #include "config.h" |
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| 17 | #endif |
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[07d880f4] | 18 | |
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| 19 | #include <pthread.h> |
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| 20 | |
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| 21 | #include <rtems/system.h> |
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| 22 | #include <rtems/posix/pthread.h> |
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| 23 | #include <rtems/posix/psignal.h> |
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| 24 | |
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[b56c1a3] | 25 | Watchdog_Control _POSIX_signals_Alarm_timer; |
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| 26 | |
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| 27 | /*PAGE |
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| 28 | * |
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| 29 | * _POSIX_signals_Alarm_TSR |
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| 30 | */ |
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[874297f3] | 31 | |
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[b56c1a3] | 32 | void _POSIX_signals_Alarm_TSR( |
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[92f4671] | 33 | Objects_Id id __attribute__((unused)), |
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| 34 | void *argument __attribute__((unused)) |
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[b56c1a3] | 35 | ) |
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| 36 | { |
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| 37 | int status; |
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| 38 | |
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| 39 | status = kill( getpid(), SIGALRM ); |
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| 40 | /* XXX can't print from an ISR, should this be fatal? */ |
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| 41 | } |
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| 42 | |
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[07d880f4] | 43 | unsigned int alarm( |
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| 44 | unsigned int seconds |
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| 45 | ) |
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| 46 | { |
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| 47 | unsigned int remaining = 0; |
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| 48 | Watchdog_Control *the_timer; |
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| 49 | |
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| 50 | the_timer = &_POSIX_signals_Alarm_timer; |
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| 51 | |
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[b56c1a3] | 52 | /* |
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| 53 | * Initialize the timer used to implement alarm(). |
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| 54 | */ |
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| 55 | |
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| 56 | if ( !the_timer->routine ) { |
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| 57 | _Watchdog_Initialize( the_timer, _POSIX_signals_Alarm_TSR, 0, NULL ); |
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| 58 | } else { |
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[ff3c06a] | 59 | Watchdog_States state; |
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| 60 | |
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| 61 | state = _Watchdog_Remove( the_timer ); |
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| 62 | if ( (state == WATCHDOG_ACTIVE) || (state == WATCHDOG_REMOVE_IT) ) { |
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| 63 | /* |
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| 64 | * The stop_time and start_time fields are snapshots of ticks since |
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| 65 | * boot. Since alarm() is dealing in seconds, we must account for |
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| 66 | * this. |
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| 67 | */ |
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| 68 | |
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| 69 | remaining = the_timer->initial - |
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| 70 | ((the_timer->stop_time - the_timer->start_time) / TOD_TICKS_PER_SECOND); |
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[b56c1a3] | 71 | } |
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[07d880f4] | 72 | } |
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| 73 | |
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[8f6b7b51] | 74 | if ( seconds ) |
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| 75 | _Watchdog_Insert_seconds( the_timer, seconds ); |
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[07d880f4] | 76 | |
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| 77 | return remaining; |
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| 78 | } |
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