diff options
Diffstat (limited to 'linuxthreads/sysdeps/pthread/getcpuclockid.c')
| -rw-r--r-- | linuxthreads/sysdeps/pthread/getcpuclockid.c | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/linuxthreads/sysdeps/pthread/getcpuclockid.c b/linuxthreads/sysdeps/pthread/getcpuclockid.c index fff1cb03ec..032caeb081 100644 --- a/linuxthreads/sysdeps/pthread/getcpuclockid.c +++ b/linuxthreads/sysdeps/pthread/getcpuclockid.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2000, 2001 Free Software Foundation, Inc. +/* Copyright (C) 2000, 2001, 2004 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 @@ -19,18 +19,27 @@ #include <errno.h> #include <pthread.h> #include <sys/time.h> +#include <time.h> #include <internals.h> int pthread_getcpuclockid (pthread_t thread_id, clockid_t *clock_id) { - /* We don't allow any process ID but our own. */ - if (thread_handle (thread_id)->h_descr != 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 (2 * PTHREAD_THREADS_MAX + >= 1 << (8 * sizeof (*clock_id) - CLOCK_IDFIELD_SIZE)) + return ERANGE; + /* Store the number. */ - *clock_id = CLOCK_THREAD_CPUTIME_ID; + *clock_id = CLOCK_THREAD_CPUTIME_ID | (thread_id << CLOCK_IDFIELD_SIZE); return 0; #else |