diff options
Diffstat (limited to 'cpukit/score/src/coretodusectoticks.c')
-rw-r--r-- | cpukit/score/src/coretodusectoticks.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/cpukit/score/src/coretodusectoticks.c b/cpukit/score/src/coretodusectoticks.c index be2cbd7024..b62e15cd27 100644 --- a/cpukit/score/src/coretodusectoticks.c +++ b/cpukit/score/src/coretodusectoticks.c @@ -1,4 +1,4 @@ -/* COPYRIGHT (c) 1989-2008. +/* COPYRIGHT (c) 1989-2011. * On-Line Applications Research Corporation (OAR). * * The license and distribution terms for this file may be @@ -21,5 +21,18 @@ uint32_t TOD_MICROSECONDS_TO_TICKS( uint32_t microseconds ) { - return (microseconds / rtems_configuration_get_microseconds_per_tick()); + uint32_t ticks; + uint32_t microseconds_per_tick; + + /** + * We should ensure the ticks not be truncated by integer division. We + * need to have it be greater than or equal to the requested time. It + * should not be shorter. + */ + microseconds_per_tick = rtems_configuration_get_microseconds_per_tick(); + ticks = microseconds / microseconds_per_tick; + if ( (microseconds % microseconds_per_tick) != 0 ) + ticks += 1; + + return ticks; } |