diff options
Diffstat (limited to 'nptl/sysdeps/pthread/pthread_getcpuclockid.c')
| -rw-r--r-- | nptl/sysdeps/pthread/pthread_getcpuclockid.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/nptl/sysdeps/pthread/pthread_getcpuclockid.c b/nptl/sysdeps/pthread/pthread_getcpuclockid.c index 6386dc4dc0..8506f94eb4 100644 --- a/nptl/sysdeps/pthread/pthread_getcpuclockid.c +++ b/nptl/sysdeps/pthread/pthread_getcpuclockid.c @@ -34,13 +34,20 @@ pthread_getcpuclockid (threadid, clockid) /* Not a valid thread handle. */ return ESRCH; - /* We don't allow any process ID but our own. */ - if (pd != THREAD_SELF) - return EPERM; - #ifdef CLOCK_THREAD_CPUTIME_ID + /* We need to store the thread ID in the CLOCKID variable together + with a number identifying the clock. We reserve the low 3 bits + for the clock ID and the rest for the thread ID. This is + problematic if the thread ID is too large. But 29 bits should be + fine. + + If some day more clock IDs are needed the ID part can be + enlarged. The IDs are entirely internal. */ + if (pd->tid >= 1 << (8 * sizeof (*clockid) - CLOCK_IDFIELD_SIZE)) + return ERANGE; + /* Store the number. */ - *clockid = CLOCK_THREAD_CPUTIME_ID; + *clockid = CLOCK_THREAD_CPUTIME_ID | (pd->tid << CLOCK_IDFIELD_SIZE); return 0; #else |