diff options
Diffstat (limited to 'sysdeps/unix/sysv')
| -rw-r--r-- | sysdeps/unix/sysv/linux/clock_getcpuclockid.c | 103 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/clock_getres.c | 175 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/clock_gettime.c | 176 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/clock_nanosleep.c | 21 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/ia64/clock_getcpuclockid.c | 23 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/kernel-posix-cpu-timers.h | 18 |
6 files changed, 427 insertions, 89 deletions
diff --git a/sysdeps/unix/sysv/linux/clock_getcpuclockid.c b/sysdeps/unix/sysv/linux/clock_getcpuclockid.c new file mode 100644 index 0000000000..ac893c0a77 --- /dev/null +++ b/sysdeps/unix/sysv/linux/clock_getcpuclockid.c @@ -0,0 +1,103 @@ +/* clock_getcpuclockid -- Get a clockid_t for process CPU time. Linux version. + Copyright (C) 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; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <errno.h> +#include <time.h> +#include <unistd.h> +#include "kernel-features.h" +#include "kernel-posix-cpu-timers.h" + +#ifndef HAS_CPUCLOCK +# define HAS_CPUCLOCK 1 +#endif + +int +clock_getcpuclockid (pid_t pid, clockid_t *clock_id) +{ +#ifdef __NR_clock_getres + /* The clockid_t value is a simple computation from the PID. + But we do a clock_getres call to validate it. */ + + const clockid_t pidclock = MAKE_PROCESS_CPUCLOCK (pid, CPUCLOCK_SCHED); + +# if !(__ASSUME_POSIX_CPU_TIMERS > 0) + extern int __libc_missing_posix_cpu_timers attribute_hidden; +# if !(__ASSUME_POSIX_TIMERS > 0) + extern int __libc_missing_posix_timers attribute_hidden; + if (__libc_missing_posix_timers && !__libc_missing_posix_cpu_timers) + __libc_missing_posix_cpu_timers = 1; +# endif + if (!__libc_missing_posix_cpu_timers) +# endif + { + INTERNAL_SYSCALL_DECL (err); + int r = INTERNAL_SYSCALL (clock_getres, err, 2, pidclock, NULL); + if (!INTERNAL_SYSCALL_ERROR_P (r, err)) + { + *clock_id = pidclock; + return 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) + { +# if !(__ASSUME_POSIX_CPU_TIMERS > 0) + if (pidclock == MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED) + || INTERNAL_SYSCALL_ERROR_P (INTERNAL_SYSCALL + (clock_getres, err, 2, + MAKE_PROCESS_CPUCLOCK + (0, CPUCLOCK_SCHED), NULL), + err)) + /* The kernel doesn't support these clocks at all. */ + __libc_missing_posix_cpu_timers = 1; + else +# endif + /* The clock_getres system call checked the PID for us. */ + return ESRCH; + } + else + return INTERNAL_SYSCALL_ERRNO (r, err); + } +# endif + + /* We don't allow any process ID but our own. */ + if (pid != 0 && pid != getpid ()) + return EPERM; + +#ifdef CLOCK_PROCESS_CPUTIME_ID + if (HAS_CPUCLOCK) + { + /* Store the number. */ + *clock_id = CLOCK_PROCESS_CPUTIME_ID; + + return 0; + } +#else + /* We don't have a timer for that. */ + return ENOENT; +#endif +} diff --git a/sysdeps/unix/sysv/linux/clock_getres.c b/sysdeps/unix/sysv/linux/clock_getres.c index 442fbd5705..610738f7bb 100644 --- a/sysdeps/unix/sysv/linux/clock_getres.c +++ b/sysdeps/unix/sysv/linux/clock_getres.c @@ -1,4 +1,5 @@ -/* Copyright (C) 2003 Free Software Foundation, Inc. +/* clock_getres -- Get the resolution of a POSIX clockid_t. Linux version. + Copyright (C) 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 @@ -17,60 +18,168 @@ 02111-1307 USA. */ #include <sysdep.h> +#include <errno.h> +#include "kernel-posix-cpu-timers.h" #include "kernel-features.h" +#define SYSCALL_GETRES \ + retval = INLINE_SYSCALL (clock_getres, 2, clock_id, res); \ + break + #ifdef __ASSUME_POSIX_TIMERS + /* This means the REALTIME and MONOTONIC clock are definitely supported in the kernel. */ -# define SYSDEP_GETRES \ +# define SYSDEP_GETRES \ + SYSDEP_GETRES_CPUTIME \ case CLOCK_REALTIME: \ case CLOCK_MONOTONIC: \ - retval = INLINE_SYSCALL (clock_getres, 2, clock_id, res); \ - break + SYSCALL_GETRES + +# define __libc_missing_posix_timers 0 #elif defined __NR_clock_getres /* Is the syscall known to exist? */ extern int __libc_missing_posix_timers attribute_hidden; +static inline int +maybe_syscall_getres (clockid_t clock_id, struct timespec *res) +{ + int e = EINVAL; + + if (!__libc_missing_posix_timers) + { + INTERNAL_SYSCALL_DECL (err); + int r = INTERNAL_SYSCALL (clock_getres, err, 2, clock_id, res); + if (!INTERNAL_SYSCALL_ERROR_P (r, err)) + return 0; + + e = INTERNAL_SYSCALL_ERRNO (r, err); + if (e == ENOSYS) + { + __libc_missing_posix_timers = 1; + e = EINVAL; + } + } + + return e; +} + /* The REALTIME and MONOTONIC clock might be available. Try the syscall first. */ -# define SYSDEP_GETRES \ +# define SYSDEP_GETRES \ + SYSDEP_GETRES_CPUTIME \ case CLOCK_REALTIME: \ case CLOCK_MONOTONIC: \ - { \ - int e = EINVAL; \ - \ - if (!__libc_missing_posix_timers) \ - { \ - INTERNAL_SYSCALL_DECL (err); \ - int r = INTERNAL_SYSCALL (clock_getres, err, 2, clock_id, res); \ - if (!INTERNAL_SYSCALL_ERROR_P (r, err)) \ - { \ - retval = 0; \ - break; \ - } \ - \ - e = INTERNAL_SYSCALL_ERRNO (r, err); \ - if (e == ENOSYS) \ - { \ - __libc_missing_posix_timers = 1; \ - e = EINVAL; \ - } \ - } \ - \ - /* Fallback code. */ \ - if (e == EINVAL && clock_id == CLOCK_REALTIME) \ - HANDLE_REALTIME; \ - else \ - __set_errno (e); \ - } \ - break + retval = maybe_syscall_getres (clock_id, res); \ + if (retval == 0) \ + break; \ + /* Fallback code. */ \ + if (retval == EINVAL && clock_id == CLOCK_REALTIME) \ + retval = realtime_getres (res); \ + else \ + { \ + __set_errno (retval); \ + retval = -1; \ + } \ + break; #endif #ifdef __NR_clock_getres /* We handled the REALTIME clock here. */ # define HANDLED_REALTIME 1 +# define HANDLED_CPUTIME 1 + +# if __ASSUME_POSIX_CPU_TIMERS > 0 + +# define SYSDEP_GETRES_CPU SYSCALL_GETRES +# define SYSDEP_GETRES_CPUTIME /* Default catches them too. */ + +# else + +extern int __libc_missing_posix_cpu_timers attribute_hidden; + +static int +maybe_syscall_getres_cpu (clockid_t clock_id, struct timespec *res) +{ + int e = EINVAL; + + if (!__libc_missing_posix_cpu_timers) + { + INTERNAL_SYSCALL_DECL (err); + int r = INTERNAL_SYSCALL (clock_getres, err, 2, clock_id, res); + if (!INTERNAL_SYSCALL_ERROR_P (r, err)) + return 0; + + e = INTERNAL_SYSCALL_ERRNO (r, err); +# ifndef __ASSUME_POSIX_TIMERS + if (e == ENOSYS) + { + __libc_missing_posix_timers = 1; + __libc_missing_posix_cpu_timers = 1; + e = EINVAL; + } + else +# endif + { + if (e == EINVAL) + { + /* Check whether the kernel supports CPU clocks at all. + If not, record it for the future. */ + r = INTERNAL_SYSCALL (clock_getres, err, 2, + MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED), + NULL); + if (INTERNAL_SYSCALL_ERROR_P (r, err)) + __libc_missing_posix_cpu_timers = 1; + } + } + } + + return e; +} + +# define SYSDEP_GETRES_CPU \ + retval = maybe_syscall_getres_cpu (clock_id, res); \ + if (retval == 0) \ + break; \ + if (retval != EINVAL || !__libc_missing_posix_cpu_timers) \ + { \ + __set_errno (retval); \ + retval = -1; \ + break; \ + } \ + retval = -1 /* Otherwise continue on to the HP_TIMING version. */; + +static inline int +maybe_syscall_getres_cputime (clockid_t clock_id, struct timespec *res) +{ + return maybe_syscall_getres_cpu + (clock_id == CLOCK_THREAD_CPUTIME_ID + ? MAKE_THREAD_CPUCLOCK (0, CPUCLOCK_SCHED) + : MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED), + res); +} + +# define SYSDEP_GETRES_CPUTIME \ + case CLOCK_PROCESS_CPUTIME_ID: \ + case CLOCK_THREAD_CPUTIME_ID: \ + retval = maybe_syscall_getres_cputime (clock_id, res); \ + if (retval == 0) \ + break; \ + if (retval != EINVAL || !__libc_missing_posix_cpu_timers) \ + { \ + __set_errno (retval); \ + retval = -1; \ + break; \ + } \ + retval = hp_timing_getres (res); \ + break; +# if !HP_TIMING_AVAIL +# define hp_timing_getres(res) (__set_errno (EINVAL), -1) +# endif + +# endif #endif #include <sysdeps/posix/clock_getres.c> diff --git a/sysdeps/unix/sysv/linux/clock_gettime.c b/sysdeps/unix/sysv/linux/clock_gettime.c index 522fac32a7..41fbbde1cc 100644 --- a/sysdeps/unix/sysv/linux/clock_gettime.c +++ b/sysdeps/unix/sysv/linux/clock_gettime.c @@ -1,4 +1,5 @@ -/* Copyright (C) 2003 Free Software Foundation, Inc. +/* clock_gettime -- Get current time from a POSIX clockid_t. Linux version. + Copyright (C) 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 @@ -17,60 +18,167 @@ 02111-1307 USA. */ #include <sysdep.h> - +#include <errno.h> +#include "kernel-posix-cpu-timers.h" #include "kernel-features.h" +#define SYSCALL_GETTIME \ + retval = INLINE_SYSCALL (clock_gettime, 2, clock_id, tp); \ + break + #ifdef __ASSUME_POSIX_TIMERS + /* This means the REALTIME and MONOTONIC clock are definitely supported in the kernel. */ -# define SYSDEP_GETTIME \ +# define SYSDEP_GETTIME \ + SYSDEP_GETTIME_CPUTIME \ case CLOCK_REALTIME: \ case CLOCK_MONOTONIC: \ - retval = INLINE_SYSCALL (clock_gettime, 2, clock_id, tp); \ - break + SYSCALL_GETTIME + +# define __libc_missing_posix_timers 0 #elif defined __NR_clock_gettime /* Is the syscall known to exist? */ int __libc_missing_posix_timers attribute_hidden; +static inline int +maybe_syscall_gettime (clockid_t clock_id, struct timespec *tp) +{ + int e = EINVAL; + + if (!__libc_missing_posix_timers) + { + INTERNAL_SYSCALL_DECL (err); + int r = INTERNAL_SYSCALL (clock_gettime, err, 2, clock_id, tp); + if (!INTERNAL_SYSCALL_ERROR_P (r, err)) + return 0; + + e = INTERNAL_SYSCALL_ERRNO (r, err); + if (e == ENOSYS) + { + __libc_missing_posix_timers = 1; + e = EINVAL; + } + } + + return e; +} + /* The REALTIME and MONOTONIC clock might be available. Try the syscall first. */ -# define SYSDEP_GETTIME \ +# define SYSDEP_GETTIME \ + SYSDEP_GETTIME_CPUTIME \ case CLOCK_REALTIME: \ case CLOCK_MONOTONIC: \ - { \ - int e = EINVAL; \ - \ - if (!__libc_missing_posix_timers) \ - { \ - INTERNAL_SYSCALL_DECL (err); \ - int r = INTERNAL_SYSCALL (clock_gettime, err, 2, clock_id, tp); \ - if (!INTERNAL_SYSCALL_ERROR_P (r, err)) \ - { \ - retval = 0; \ - break; \ - } \ - \ - e = INTERNAL_SYSCALL_ERRNO (r, err); \ - if (e == ENOSYS) \ - { \ - __libc_missing_posix_timers = 1; \ - e = EINVAL; \ - } \ - } \ - \ - /* Fallback code. */ \ - if (e == EINVAL && clock_id == CLOCK_REALTIME) \ - HANDLE_REALTIME; \ - else \ - __set_errno (e); \ - } \ - break + retval = maybe_syscall_gettime (clock_id, tp); \ + if (retval == 0) \ + break; \ + /* Fallback code. */ \ + if (retval == EINVAL && clock_id == CLOCK_REALTIME) \ + retval = realtime_gettime (tp); \ + else \ + { \ + __set_errno (retval); \ + retval = -1; \ + } \ + break; #endif #ifdef __NR_clock_gettime /* We handled the REALTIME clock here. */ # define HANDLED_REALTIME 1 +# define HANDLED_CPUTIME 1 + +# if __ASSUME_POSIX_CPU_TIMERS > 0 + +# define SYSDEP_GETTIME_CPU SYSCALL_GETTIME +# define SYSDEP_GETTIME_CPUTIME /* Default catches them too. */ + +# else + +int __libc_missing_posix_cpu_timers attribute_hidden; + +static int +maybe_syscall_gettime_cpu (clockid_t clock_id, struct timespec *tp) +{ + int e = EINVAL; + + if (!__libc_missing_posix_cpu_timers) + { + INTERNAL_SYSCALL_DECL (err); + int r = INTERNAL_SYSCALL (clock_gettime, err, 2, clock_id, tp); + if (!INTERNAL_SYSCALL_ERROR_P (r, err)) + return 0; + + e = INTERNAL_SYSCALL_ERRNO (r, err); +# ifndef __ASSUME_POSIX_TIMERS + if (e == ENOSYS) + { + __libc_missing_posix_timers = 1; + __libc_missing_posix_cpu_timers = 1; + e = EINVAL; + } + else +# endif + { + if (e == EINVAL) + { + /* Check whether the kernel supports CPU clocks at all. + If not, record it for the future. */ + r = INTERNAL_SYSCALL (clock_getres, err, 2, + MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED), + NULL); + if (INTERNAL_SYSCALL_ERROR_P (r, err)) + __libc_missing_posix_cpu_timers = 1; + } + } + } + + return e; +} + +# define SYSDEP_GETTIME_CPU \ + retval = maybe_syscall_gettime_cpu (clock_id, tp); \ + if (retval == 0) \ + break; \ + if (retval != EINVAL || !__libc_missing_posix_cpu_timers) \ + { \ + __set_errno (retval); \ + retval = -1; \ + break; \ + } \ + retval = -1 /* Otherwise continue on to the HP_TIMING version. */; + +static inline int +maybe_syscall_gettime_cputime (clockid_t clock_id, struct timespec *tp) +{ + return maybe_syscall_gettime_cpu + (clock_id == CLOCK_THREAD_CPUTIME_ID + ? MAKE_THREAD_CPUCLOCK (0, CPUCLOCK_SCHED) + : MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED), + tp); +} + +# define SYSDEP_GETTIME_CPUTIME \ + case CLOCK_PROCESS_CPUTIME_ID: \ + case CLOCK_THREAD_CPUTIME_ID: \ + retval = maybe_syscall_gettime_cputime (clock_id, tp); \ + if (retval == 0) \ + break; \ + if (retval != EINVAL || !__libc_missing_posix_cpu_timers) \ + { \ + __set_errno (retval); \ + retval = -1; \ + break; \ + } \ + retval = hp_timing_gettime (clock_id, tp); \ + break; +# if !HP_TIMING_AVAIL +# define hp_timing_gettime(clock_id, tp) (__set_errno (EINVAL), -1) +# endif + +# endif #endif #include <sysdeps/unix/clock_gettime.c> diff --git a/sysdeps/unix/sysv/linux/clock_nanosleep.c b/sysdeps/unix/sysv/linux/clock_nanosleep.c index 2a3dd411a1..3fb14b48aa 100644 --- a/sysdeps/unix/sysv/linux/clock_nanosleep.c +++ b/sysdeps/unix/sysv/linux/clock_nanosleep.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2003 Free Software Foundation, Inc. +/* Copyright (C) 2003, 2004, 2005 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 @@ -17,9 +17,11 @@ 02111-1307 USA. */ #include <time.h> +#include <errno.h> #include <sysdep-cancel.h> #include "kernel-features.h" +#include "kernel-posix-cpu-timers.h" #ifdef __ASSUME_POSIX_TIMERS @@ -32,6 +34,11 @@ clock_nanosleep (clockid_t clock_id, int flags, const struct timespec *req, INTERNAL_SYSCALL_DECL (err); int r; + if (clock_id == CLOCK_THREAD_CPUTIME_ID) + return EINVAL; + if (clock_id == CLOCK_PROCESS_CPUTIME_ID) + clock_id = MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED); + if (SINGLE_THREAD_P) r = INTERNAL_SYSCALL (clock_nanosleep, err, 4, clock_id, flags, req, rem); else @@ -58,12 +65,20 @@ extern int __libc_missing_posix_timers attribute_hidden; # define SYSDEP_NANOSLEEP \ if (!__libc_missing_posix_timers) \ { \ + clockid_t syscall_clockid; \ INTERNAL_SYSCALL_DECL (err); \ \ + if (clock_id == CLOCK_THREAD_CPUTIME_ID) \ + return EINVAL; \ + if (clock_id == CLOCK_PROCESS_CPUTIME_ID) \ + syscall_clockid = MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED); \ + else \ + syscall_clockid = clock_id; \ + \ int oldstate = LIBC_CANCEL_ASYNC (); \ \ - int r = INTERNAL_SYSCALL (clock_nanosleep, err, 4, clock_id, flags, \ - req, rem); \ + int r = INTERNAL_SYSCALL (clock_nanosleep, err, 4, \ + syscall_clockid, flags, req, rem); \ \ LIBC_CANCEL_RESET (oldstate); \ \ diff --git a/sysdeps/unix/sysv/linux/ia64/clock_getcpuclockid.c b/sysdeps/unix/sysv/linux/ia64/clock_getcpuclockid.c index d2c45a560a..2f39851535 100644 --- a/sysdeps/unix/sysv/linux/ia64/clock_getcpuclockid.c +++ b/sysdeps/unix/sysv/linux/ia64/clock_getcpuclockid.c @@ -1,4 +1,5 @@ -/* Copyright (C) 2000, 2001, 2003, 2004 Free Software Foundation, Inc. +/* clock_getcpuclockid -- Get a clockid_t for process CPU time. Linux/IA64 + Copyright (C) 2000,2001,2003,2004 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 @@ -26,22 +27,6 @@ #include "has_cpuclock.c" +#define HAS_CPUCLOCK (has_cpuclock () > 0) -int -clock_getcpuclockid (pid_t pid, clockid_t *clock_id) -{ - /* We don't allow any process ID but our own. */ - if (pid != 0 && pid != getpid ()) - return EPERM; - - int retval = ENOENT; - - if (has_cpuclock () > 0) - { - /* Store the number. */ - *clock_id = CLOCK_PROCESS_CPUTIME_ID; - retval = 0; - } - - return retval; -} +#include <sysdeps/unix/sysv/linux/clock_getcpuclockid.c> diff --git a/sysdeps/unix/sysv/linux/kernel-posix-cpu-timers.h b/sysdeps/unix/sysv/linux/kernel-posix-cpu-timers.h new file mode 100644 index 0000000000..164a90ddeb --- /dev/null +++ b/sysdeps/unix/sysv/linux/kernel-posix-cpu-timers.h @@ -0,0 +1,18 @@ +/* Parameters for the Linux kernel ABI for CPU clocks. */ + +#define CPUCLOCK_PID(clock) ((pid_t) ~((clock) >> 3)) +#define CPUCLOCK_PERTHREAD(clock) \ + (((clock) & (clockid_t) CPUCLOCK_PERTHREAD_MASK) != 0) +#define CPUCLOCK_PID_MASK 7 +#define CPUCLOCK_PERTHREAD_MASK 4 +#define CPUCLOCK_WHICH(clock) ((clock) & (clockid_t) CPUCLOCK_CLOCK_MASK) +#define CPUCLOCK_CLOCK_MASK 3 +#define CPUCLOCK_PROF 0 +#define CPUCLOCK_VIRT 1 +#define CPUCLOCK_SCHED 2 +#define CPUCLOCK_MAX 3 + +#define MAKE_PROCESS_CPUCLOCK(pid, clock) \ + ((~(clockid_t) (pid) << 3) | (clockid_t) (clock)) +#define MAKE_THREAD_CPUCLOCK(tid, clock) \ + MAKE_PROCESS_CPUCLOCK((tid), (clock) | CPUCLOCK_PERTHREAD_MASK) |