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authorFlorian Weimer <fweimer@redhat.com>2021-05-17 09:59:14 +0200
committerFlorian Weimer <fweimer@redhat.com>2021-05-17 10:25:11 +0200
commite948be4db3ed254b6ba55d5250021f649a9a1c41 (patch)
tree6500a6e3491b6ae0ec8941a339ba5f856004b754 /nptl
parent8f72bed1aa42105cd2353333363f2138c7d531a9 (diff)
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nptl: Replace pthread_getcpuclockid with Linux implementation
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diffstat (limited to 'nptl')
-rw-r--r--nptl/pthread_getcpuclockid.c24
1 files changed, 6 insertions, 18 deletions
diff --git a/nptl/pthread_getcpuclockid.c b/nptl/pthread_getcpuclockid.c
index ebc48d5..ae7122c 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
}