summaryrefslogtreecommitdiffstats
path: root/cpukit/posix/src/psxtimercreate.c
diff options
context:
space:
mode:
Diffstat (limited to 'cpukit/posix/src/psxtimercreate.c')
-rw-r--r--cpukit/posix/src/psxtimercreate.c31
1 files changed, 29 insertions, 2 deletions
diff --git a/cpukit/posix/src/psxtimercreate.c b/cpukit/posix/src/psxtimercreate.c
index 0eefac3f42..907da01836 100644
--- a/cpukit/posix/src/psxtimercreate.c
+++ b/cpukit/posix/src/psxtimercreate.c
@@ -51,6 +51,31 @@
#include <rtems/seterr.h>
#include <rtems/sysinit.h>
+RTEMS_WEAK int _POSIX_Timer_Is_allowed(
+ clockid_t clock_id
+)
+{
+ int rc = 0;
+
+ /*
+ * Allow timer_create(CLOCK_REALTIME. ...) per POSIX by default
+ * on CLOCK_REALTIME or CLOCK_MONOTONIC.
+ *
+ * But per the FACE Technical Standard, POSIX timers should not be
+ * allowed on CLOCK_REALTIME for safety reasons. If the application
+ * configures that it wants the FACE behavior, then this method
+ * is overridden by <rtems/confdefs/timer.h>.
+ */
+
+ if ( clock_id != CLOCK_REALTIME ) {
+ if ( clock_id != CLOCK_MONOTONIC ) {
+ rc = EINVAL;
+ }
+ }
+
+ return rc;
+}
+
int timer_create(
clockid_t clock_id,
struct sigevent *__restrict evp,
@@ -58,9 +83,11 @@ int timer_create(
)
{
POSIX_Timer_Control *ptimer;
+ int rc;
- if ( clock_id != CLOCK_REALTIME && clock_id != CLOCK_MONOTONIC )
- rtems_set_errno_and_return_minus_one( EINVAL );
+ rc = _POSIX_Timer_Is_allowed( clock_id );
+ if ( rc != 0 )
+ rtems_set_errno_and_return_minus_one( rc );
if ( !timerid )
rtems_set_errno_and_return_minus_one( EINVAL );