diff options
Diffstat (limited to 'nptl/pthread_getcpuclockid.c')
| -rw-r--r-- | nptl/pthread_getcpuclockid.c | 24 |
1 files changed, 6 insertions, 18 deletions
diff --git a/nptl/pthread_getcpuclockid.c b/nptl/pthread_getcpuclockid.c index ebc48d59ea..ae7122cb5f 100644 --- a/nptl/pthread_getcpuclockid.c +++ b/nptl/pthread_getcpuclockid.c @@ -1,4 +1,5 @@ -/* Copyright (C) 2000-2021 Free Software Foundation, Inc. +/* pthread_getcpuclockid -- Get POSIX clockid_t for a pthread_t. Linux version + Copyright (C) 2000-2021 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -19,6 +20,7 @@ #include <pthreadP.h> #include <sys/time.h> #include <tls.h> +#include <kernel-posix-cpu-timers.h> int @@ -31,24 +33,10 @@ pthread_getcpuclockid (pthread_t threadid, clockid_t *clockid) /* Not a valid thread handle. */ return ESRCH; -#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. + /* The clockid_t value is a simple computation from the TID. */ - 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 | (pd->tid << CLOCK_IDFIELD_SIZE); + const clockid_t tidclock = MAKE_THREAD_CPUCLOCK (pd->tid, CPUCLOCK_SCHED); + *clockid = tidclock; return 0; -#else - /* We don't have a timer for that. */ - return ENOENT; -#endif } |