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author | Joel Sherrill <joel.sherrill@OARcorp.com> | 2007-12-17 16:01:42 +0000 |
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committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 2007-12-17 16:01:42 +0000 |
commit | a6cbc9b8690825aebde9694e9132230d57d53847 (patch) | |
tree | 0974c40531822c54d167e4bdea37e57dca40ec9e /cpukit/posix/src/timergettime.c | |
parent | Formatting. (diff) | |
download | rtems-a6cbc9b8690825aebde9694e9132230d57d53847.tar.bz2 |
2007-12-17 Joel Sherrill <joel.sherrill@OARcorp.com>
* posix/Makefile.am, posix/preinstall.am,
posix/include/rtems/posix/timer.h, score/src/objectget.c: Split POSIX
Timer implementation into multiple files. Add obvious error checks
for NULL parameters. Attempt to reduce include files.
* posix/src/timercreate.c, posix/src/timerdelete.c,
posix/src/timergetoverrun.c, posix/src/timergettime.c,
posix/src/timerinserthelper.c, posix/src/timersettime.c,
posix/src/timertsr.c: New files.
* posix/src/ptimer1.c: Removed.
Diffstat (limited to 'cpukit/posix/src/timergettime.c')
-rw-r--r-- | cpukit/posix/src/timergettime.c | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/cpukit/posix/src/timergettime.c b/cpukit/posix/src/timergettime.c new file mode 100644 index 0000000000..2f759abcb3 --- /dev/null +++ b/cpukit/posix/src/timergettime.c @@ -0,0 +1,75 @@ +/* + * 14.2.4 Per-Process Timers, P1003.1b-1993, p. 267 + * + * COPYRIGHT (c) 1989-2007. + * On-Line Applications Research Corporation (OAR). + * + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.rtems.com/license/LICENSE. + * + * $Id$ + */ + +#if HAVE_CONFIG_H +#include "config.h" +#endif + +#include <time.h> +#include <errno.h> + +#include <rtems/system.h> +#include <rtems/seterr.h> +#include <rtems/score/thread.h> +#include <rtems/score/tod.h> +#include <rtems/posix/timer.h> + +/* + * - When a timer is initialized, the value of the time in + * that moment is stored. + * - When this function is called, it returns the difference + * between the current time and the initialization time. + */ + +int timer_gettime( + timer_t timerid, + struct itimerspec *value +) +{ + POSIX_Timer_Control *ptimer; + Objects_Locations location; + struct timespec current_time; + + if ( !value ) + rtems_set_errno_and_return_minus_one( EINVAL ); + + /* Reads the current time */ + _TOD_Get( ¤t_time ); + + ptimer = _POSIX_Timer_Get( timerid, &location ); + switch ( location ) { + + case OBJECTS_LOCAL: + + /* Calculates the time left before the timer finishes */ + + _Timespec_Subtract( + &ptimer->timer_data.it_value, + ¤t_time, + &value->it_value + ); + + value->it_interval = ptimer->timer_data.it_interval; + + _Thread_Enable_dispatch(); + return 0; + +#if defined(RTEMS_MULTIPROCESSING) + case OBJECTS_REMOTE: +#endif + case OBJECTS_ERROR: + break; + } + + rtems_set_errno_and_return_minus_one( EINVAL ); +} |