diff options
Diffstat (limited to 'nptl/sysdeps')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/pthread_getcpuclockid.c | 111 | ||||
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/timer_create.c | 13 |
2 files changed, 121 insertions, 3 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/pthread_getcpuclockid.c b/nptl/sysdeps/unix/sysv/linux/pthread_getcpuclockid.c new file mode 100644 index 0000000000..088b3392bc --- /dev/null +++ b/nptl/sysdeps/unix/sysv/linux/pthread_getcpuclockid.c @@ -0,0 +1,111 @@ +/* pthread_getcpuclockid -- Get POSIX clockid_t for a pthread_t. Linux version + Copyright (C) 2000,2001,2002,2003,2004 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 + modify it under the terms of the GNU Lesser General Public License as + published by the Free Software Foundation; either version 2.1 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <errno.h> +#include <pthreadP.h> +#include <sys/time.h> +#include <tls.h> +#include "kernel-features.h" +#include "kernel-posix-cpu-timers.h" + + +#if !(__ASSUME_POSIX_CPU_TIMERS > 0) +int __libc_missing_posix_cpu_timers attribute_hidden; +#endif +#if !(__ASSUME_POSIX_TIMERS > 0) +int __libc_missing_posix_timers attribute_hidden; +#endif + +int +pthread_getcpuclockid (threadid, clockid) + pthread_t threadid; + clockid_t *clockid; +{ + struct pthread *pd = (struct pthread *) threadid; + + /* Make sure the descriptor is valid. */ + if (INVALID_TD_P (pd)) + /* Not a valid thread handle. */ + return ESRCH; + +#ifdef __NR_clock_getres + /* The clockid_t value is a simple computation from the TID. + But we do a clock_getres call to validate it if we aren't + yet sure we have the kernel support. */ + + const clockid_t tidclock = MAKE_THREAD_CPUCLOCK (pd->tid, CPUCLOCK_SCHED); + +# if !(__ASSUME_POSIX_CPU_TIMERS > 0) +# if !(__ASSUME_POSIX_TIMERS > 0) + if (__libc_missing_posix_timers && !__libc_missing_posix_cpu_timers) + __libc_missing_posix_cpu_timers = 1; +# endif + if (!__libc_missing_posix_cpu_timers) + { + INTERNAL_SYSCALL_DECL (err); + int r = INTERNAL_SYSCALL (clock_getres, err, 2, tidclock, NULL); + if (!INTERNAL_SYSCALL_ERROR_P (r, err)) +# endif + { + *clockid = tidclock; + return 0; + } + +# if !(__ASSUME_POSIX_CPU_TIMERS > 0) +# if !(__ASSUME_POSIX_TIMERS > 0) + if (INTERNAL_SYSCALL_ERRNO (r, err) == ENOSYS) + { + /* The kernel doesn't support these calls at all. */ + __libc_missing_posix_timers = 1; + __libc_missing_posix_cpu_timers = 1; + } + else +# endif + if (INTERNAL_SYSCALL_ERRNO (r, err) == EINVAL) + { + /* The kernel doesn't support these clocks at all. */ + __libc_missing_posix_cpu_timers = 1; + } + else + return INTERNAL_SYSCALL_ERRNO (r, err); + } +# endif +#endif + +#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 | (pd->tid << CLOCK_IDFIELD_SIZE); + + return 0; +#else + /* We don't have a timer for that. */ + return ENOENT; +#endif +} diff --git a/nptl/sysdeps/unix/sysv/linux/timer_create.c b/nptl/sysdeps/unix/sysv/linux/timer_create.c index ca6ff6c7ef..5e99513950 100644 --- a/nptl/sysdeps/unix/sysv/linux/timer_create.c +++ b/nptl/sysdeps/unix/sysv/linux/timer_create.c @@ -28,6 +28,7 @@ #include <internaltypes.h> #include <nptl/pthreadP.h> #include "kernel-posix-timers.h" +#include "kernel-posix-cpu-timers.h" #ifdef __NR_timer_create @@ -58,6 +59,12 @@ timer_create (clock_id, evp, timerid) if (__no_posix_timers >= 0) # endif { + clockid_t syscall_clockid = (clock_id == CLOCK_PROCESS_CPUTIME_ID + ? MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED) + : clock_id == CLOCK_THREAD_CPUTIME_ID + ? MAKE_THREAD_CPUCLOCK (0, CPUCLOCK_SCHED) + : clock_id); + /* If the user wants notification via a thread we need to handle this special. */ if (evp == NULL @@ -88,7 +95,7 @@ timer_create (clock_id, evp, timerid) } kernel_timer_t ktimerid; - int retval = INLINE_SYSCALL (timer_create, 3, clock_id, evp, + int retval = INLINE_SYSCALL (timer_create, 3, syscall_clockid, evp, &ktimerid); # ifndef __ASSUME_POSIX_TIMERS @@ -196,8 +203,8 @@ timer_create (clock_id, evp, timerid) /* Create the timer. */ INTERNAL_SYSCALL_DECL (err); int res; - res = INTERNAL_SYSCALL (timer_create, err, 3, clock_id, &sev, - &newp->ktimerid); + res = INTERNAL_SYSCALL (timer_create, err, 3, + syscall_clockid, &sev, &newp->ktimerid); if (! INTERNAL_SYSCALL_ERROR_P (res, err)) { *timerid = (timer_t) newp; |