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| author | Gregory Nutt <gnutt@nuttx.org> | 2015-02-19 08:41:15 -0600 |
|---|---|---|
| committer | Gregory Nutt <gnutt@nuttx.org> | 2015-02-19 08:41:15 -0600 |
| commit | 406c3a3b7ddefbfadbae9ac1858a4b235c7e6cfd (patch) | |
| tree | 6727ef6251a1bd8ce38e99da234c0c0a8985cf59 | |
| parent | ef6882ab743f7286d168ca10cc16dc6b72caf7cf (diff) | |
| download | nuttx-406c3a3b7ddefbfadbae9ac1858a4b235c7e6cfd.tar.gz nuttx-406c3a3b7ddefbfadbae9ac1858a4b235c7e6cfd.tar.bz2 nuttx-406c3a3b7ddefbfadbae9ac1858a4b235c7e6cfd.zip | |
apps/examples/ostest: Sample errno on returns from sem_timedwait(). Otherwise, intervening system calls my change the value of the reported errno. Noted by Juha Niskanen
| -rw-r--r-- | apps/examples/ostest/semtimed.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/apps/examples/ostest/semtimed.c b/apps/examples/ostest/semtimed.c index 447f97cc5..fc147aa06 100644 --- a/apps/examples/ostest/semtimed.c +++ b/apps/examples/ostest/semtimed.c @@ -1,7 +1,7 @@ /*********************************************************************** * apps/examples/ostest/semtimed.c * - * Copyright (C) 2014 Gregory Nutt. All rights reserved. + * Copyright (C) 2014-2015 Gregory Nutt. All rights reserved. * Author: Gregory Nutt <gnutt@nuttx.org> * * Redistribution and use in source and binary forms, with or without @@ -92,6 +92,7 @@ void semtimed_test(void) int prio_min; int prio_max; int prio_mid; + int errcode; pthread_attr_t attr; int status; @@ -106,7 +107,9 @@ void semtimed_test(void) abstime.tv_nsec = before.tv_nsec; printf("semtimed_test: Waiting for two second timeout\n"); - status = sem_timedwait(&sem, &abstime); + status = sem_timedwait(&sem, &abstime); + errcode = errno; + (void)clock_gettime(CLOCK_REALTIME, &after); if (status == OK) @@ -115,7 +118,6 @@ void semtimed_test(void) } else { - int errcode = errno; if (errcode == ETIMEDOUT) { printf("samwait_test: PASS\n"); @@ -192,12 +194,13 @@ void semtimed_test(void) abstime.tv_nsec = before.tv_nsec; printf("semtimed_test: Waiting for two second timeout\n"); - status = sem_timedwait(&sem, &abstime); + status = sem_timedwait(&sem, &abstime); + errcode = errno; + (void)clock_gettime(CLOCK_REALTIME, &after); if (status < 0) { - int errcode = errno; printf("semtimed_test: ERROR: sem_timedwait failed with: %d\n", errcode); } else |