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Remove __ASSUME_POSIX_TIMERS.

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This commit is contained in:
Joseph Myers 2012-08-16 14:03:43 +00:00
parent 4b4f2771c2
commit 93a78ac437
20 changed files with 313 additions and 852 deletions
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21
ChangeLog
View File

@ -1,3 +1,24 @@
2012-08-16 Joseph Myers <joseph@codesourcery.com>
* sysdeps/unix/sysv/linux/kernel-features.h
(__ASSUME_POSIX_TIMERS): Remove.
* sysdeps/unix/sysv/linux/clock_getcpuclockid.c
[!__ASSUME_POSIX_TIMERS]: Remove conditional code.
* sysdeps/unix/sysv/linux/clock_getres.c [__ASSUME_POSIX_TIMERS]:
Make code unconditional.
[!__ASSUME_POSIX_TIMERS]: Remove conditional code.
* sysdeps/unix/sysv/linux/clock_gettime.c [__ASSUME_POSIX_TIMERS]:
Make code unconditional.
[!__ASSUME_POSIX_TIMERS]: Remove conditional code.
* sysdeps/unix/sysv/linux/clock_nanosleep.c
[__ASSUME_POSIX_TIMERS]: Make code unconditional.
[!__ASSUME_POSIX_TIMERS]: Remove conditional code.
* sysdeps/unix/sysv/linux/clock_settime.c [__ASSUME_POSIX_TIMERS]:
Make code unconditional.
[!__ASSUME_POSIX_TIMERS]: Remove conditional code.
[__ASSUME_POSIX_CPU_TIMERS <= 0 && __NR_clock_settime]
(__libc_missing_posix_timers): Remove.
2012-08-15 Roland McGrath <roland@hack.frob.com>
* elf/dl-load.c (_dl_map_object_from_fd) [SHARED]: Conditionalize

39
nptl/ChangeLog
View File

@ -1,3 +1,42 @@
2012-08-16 Joseph Myers <joseph@codesourcery.com>
* pthread_cond_timedwait.c (__pthread_cond_timedwait)
[!__ASSUME_POSIX_TIMERS]: Remove conditional code.
* pthread_condattr_setclock.c (pthread_condattr_setclock)
[!__ASSUME_POSIX_TIMERS]: Likewise.
* sysdeps/unix/sysv/linux/i386/i486/pthread_cond_timedwait.S
(__pthread_cond_timedwait) [!__ASSUME_POSIX_TIMERS]: Likewise.
* sysdeps/unix/sysv/linux/pthread_getcpuclockid.c
[!__ASSUME_POSIX_TIMERS]: Likewise.
* sysdeps/unix/sysv/linux/sh/pthread_cond_timedwait.S
(__pthread_cond_timedwait) [!__ASSUME_POSIX_TIMERS]: Likewise.
* sysdeps/unix/sysv/linux/timer_create.c [__NR_timer_create]: Make
code unconditional.
[!__NR-timer_create]: Remove conditional code.
(timer_create) [!__ASSUME_POSIX_TIMERS]: Likewise.
* sysdeps/unix/sysv/linux/timer_delete.c [__NR_timer_delete]: Make
code unconditional.
[!__NR_timer_delete]: Remove conditional code.
(timer_delete) [!__ASSUME_POSIX_TIMERS]: Likewise.
* sysdeps/unix/sysv/linux/timer_getoverr.c
[__NR_timer_getoverrun]: Make code unconditional.
[!__NR_timer_getoverrun]: Remove conditional code.
(timer_getoverrun) [!__ASSUME_POSIX_TIMERS]: Likewise.
* sysdeps/unix/sysv/linux/timer_gettime.c [__NR_timer_gettime]:
Make code unconditional.
[!__NR_timer_gettime]: Remove conditional code.
(timer_gettime) [!__ASSUME_POSIX_TIMERS]: Likewise.
* sysdeps/unix/sysv/linux/timer_routines.c [__NR_timer_create]:
Make code unconditional.
[!__ASSUME_POSIX_TIMERS]: Remove conditional code.
* sysdeps/unix/sysv/linux/timer_settime.c [__NR_timer_settime]:
Make code unconditional.
[!__NR_timer_settime]: Remove conditional code.
(timer_settime) [!__ASSUME_POSIX_TIMERS]: Likewise.
* sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S
(__pthread_cond_timedwait) [!__ASSUME_POSIX_TIMERS]: Remove
conditional code.
2012-08-15 Tom de Vries <vries@codesourcery.com>
Maxim Kuvyrkov <maxim@codesourcery.com>

22
nptl/pthread_cond_timedwait.c
View File

@ -1,4 +1,4 @@
/* Copyright (C) 2003,2004,2007,2010,2011 Free Software Foundation, Inc.
/* Copyright (C) 2003-2012 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Martin Schwidefsky <schwidefsky@de.ibm.com>, 2003.
@ -113,23 +113,9 @@ __pthread_cond_timedwait (cond, mutex, abstime)
(cond->__data.__nwaiters
& ((1 << COND_NWAITERS_SHIFT) - 1)),
&rt);
# ifndef __ASSUME_POSIX_TIMERS
if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (ret, err), 0))
{
struct timeval tv;
(void) gettimeofday (&tv, NULL);
/* Convert the absolute timeout value to a relative timeout. */
rt.tv_sec = abstime->tv_sec - tv.tv_sec;
rt.tv_nsec = abstime->tv_nsec - tv.tv_usec * 1000;
}
else
# endif
{
/* Convert the absolute timeout value to a relative timeout. */
rt.tv_sec = abstime->tv_sec - rt.tv_sec;
rt.tv_nsec = abstime->tv_nsec - rt.tv_nsec;
}
/* Convert the absolute timeout value to a relative timeout. */
rt.tv_sec = abstime->tv_sec - rt.tv_sec;
rt.tv_nsec = abstime->tv_nsec - rt.tv_nsec;
#else
/* Get the current time. So far we support only one clock. */
struct timeval tv;

30
nptl/pthread_condattr_setclock.c
View File

@ -1,4 +1,4 @@
/* Copyright (C) 2003, 2004, 2007, 2008 Free Software Foundation, Inc.
/* Copyright (C) 2003-2012 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
@ -30,32 +30,8 @@ pthread_condattr_setclock (attr, clock_id)
pthread_condattr_t *attr;
clockid_t clock_id;
{
/* Only a few clocks are allowed. CLOCK_REALTIME is always allowed.
CLOCK_MONOTONIC only if the kernel has the necessary support. */
if (clock_id == CLOCK_MONOTONIC)
{
#ifndef __ASSUME_POSIX_TIMERS
# ifdef __NR_clock_getres
/* Check whether the clock is available. */
static int avail;
if (avail == 0)
{
struct timespec ts;
INTERNAL_SYSCALL_DECL (err);
int val;
val = INTERNAL_SYSCALL (clock_getres, err, 2, CLOCK_MONOTONIC, &ts);
avail = INTERNAL_SYSCALL_ERROR_P (val, err) ? -1 : 1;
}
if (avail < 0)
# endif
/* Not available. */
return EINVAL;
#endif
}
else if (clock_id != CLOCK_REALTIME)
/* Only a few clocks are allowed. */
if (clock_id != CLOCK_MONOTONIC && clock_id != CLOCK_REALTIME)
/* If more clocks are allowed some day the storing of the clock ID
in the pthread_cond_t structure needs to be adjusted. */
return EINVAL;

28
nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_timedwait.S
View File

@ -122,10 +122,6 @@ __pthread_cond_timedwait:
leal 4(%esp), %ecx
movl $__NR_clock_gettime, %eax
ENTER_KERNEL
# ifndef __ASSUME_POSIX_TIMERS
cmpl $-ENOSYS, %eax
je 19f
# endif
movl %edx, %ebx
/* Compute relative timeout. */
@ -482,30 +478,6 @@ __pthread_cond_timedwait:
call __lll_unlock_wake
jmp 11b
#if defined __NR_clock_gettime && !defined __ASSUME_POSIX_TIMERS
/* clock_gettime not available. */
19: leal 4(%esp), %ebx
xorl %ecx, %ecx
movl $__NR_gettimeofday, %eax
ENTER_KERNEL
movl %edx, %ebx
/* Compute relative timeout. */
movl 8(%esp), %eax
movl $1000, %edx
mul %edx /* Milli seconds to nano seconds. */
movl (%ebp), %ecx
movl 4(%ebp), %edx
subl 4(%esp), %ecx
subl %eax, %edx
jns 20f
addl $1000000000, %edx
subl $1, %ecx
20: testl %ecx, %ecx
movl $-ETIMEDOUT, %esi
js 6b
jmp 21b
#endif
.size __pthread_cond_timedwait, .-__pthread_cond_timedwait
versioned_symbol (libpthread, __pthread_cond_timedwait, pthread_cond_timedwait,
GLIBC_2_3_2)

22
nptl/sysdeps/unix/sysv/linux/pthread_getcpuclockid.c
View File

@ -1,5 +1,5 @@
/* pthread_getcpuclockid -- Get POSIX clockid_t for a pthread_t. Linux version
Copyright (C) 2000,2001,2002,2003,2004,2005 Free Software Foundation, Inc.
Copyright (C) 2000-2012 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
@ -27,9 +27,6 @@
#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)
@ -51,10 +48,6 @@ pthread_getcpuclockid (threadid, clockid)
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);
@ -67,21 +60,12 @@ pthread_getcpuclockid (threadid, clockid)
}
# if !(__ASSUME_POSIX_CPU_TIMERS > 0)
# if !(__ASSUME_POSIX_TIMERS > 0)
if (INTERNAL_SYSCALL_ERRNO (r, err) == ENOSYS)
if (INTERNAL_SYSCALL_ERRNO (r, err) == EINVAL)
{
/* The kernel doesn't support these calls at all. */
__libc_missing_posix_timers = 1;
/* The kernel doesn't support these clocks at all. */
__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

22
nptl/sysdeps/unix/sysv/linux/sh/pthread_cond_timedwait.S
View File

@ -158,10 +158,6 @@ __pthread_cond_timedwait:
mov.w .L__NR_clock_gettime, r3
trapa #0x12
SYSCALL_INST_PAD
# ifndef __ASSUME_POSIX_TIMERS
cmp/eq #-ENOSYS, r0
bt 19f
# endif
/* Compute relative timeout. */
mov.l @r13, r2
@ -172,24 +168,6 @@ __pthread_cond_timedwait:
.L__NR_clock_gettime:
.word __NR_clock_gettime
# ifndef __ASSUME_POSIX_TIMERS
19:
mov r15, r4
add #16, r4
mov #0, r5
mov #__NR_gettimeofday, r3
trapa #0x12
SYSCALL_INST_PAD
/* Compute relative timeout. */
mov.l @(20,r15), r0
mov.w .L1k, r1
dmulu.l r0, r1 /* Micro seconds to nano seconds. */
mov.l @r13, r2
mov.l @(4,r13), r3
mov.l @(16,r15), r0
sts macl, r1
#endif
0:
#else
mov r15, r4

312
nptl/sysdeps/unix/sysv/linux/timer_create.c
View File

@ -1,4 +1,4 @@
/* Copyright (C) 2003,2004, 2007, 2009 Free Software Foundation, Inc.
/* Copyright (C) 2003-2012 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
@ -30,21 +30,9 @@
#include "kernel-posix-cpu-timers.h"
#ifdef __NR_timer_create
# ifndef __ASSUME_POSIX_TIMERS
static int compat_timer_create (clockid_t clock_id, struct sigevent *evp,
timer_t *timerid);
# define timer_create static compat_timer_create
# include <nptl/sysdeps/pthread/timer_create.c>
# undef timer_create
/* Nonzero if the system calls are not available. */
int __no_posix_timers attribute_hidden;
# endif
# ifdef timer_create_alias
# define timer_create timer_create_alias
# endif
#ifdef timer_create_alias
# define timer_create timer_create_alias
#endif
int
@ -53,190 +41,140 @@ timer_create (clock_id, evp, timerid)
struct sigevent *evp;
timer_t *timerid;
{
# undef timer_create
# ifndef __ASSUME_POSIX_TIMERS
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);
#undef timer_create
{
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
|| __builtin_expect (evp->sigev_notify != SIGEV_THREAD, 1))
{
struct sigevent local_evp;
/* If the user wants notification via a thread we need to handle
this special. */
if (evp == NULL
|| __builtin_expect (evp->sigev_notify != SIGEV_THREAD, 1))
{
struct sigevent local_evp;
/* We avoid allocating too much memory by basically
using struct timer as a derived class with the
first two elements being in the superclass. We only
need these two elements here. */
struct timer *newp = (struct timer *) malloc (offsetof (struct timer,
thrfunc));
if (newp == NULL)
/* No more memory. */
/* We avoid allocating too much memory by basically
using struct timer as a derived class with the
first two elements being in the superclass. We only
need these two elements here. */
struct timer *newp = (struct timer *) malloc (offsetof (struct timer,
thrfunc));
if (newp == NULL)
/* No more memory. */
return -1;
if (evp == NULL)
{
/* The kernel has to pass up the timer ID which is a
userlevel object. Therefore we cannot leave it up to
the kernel to determine it. */
local_evp.sigev_notify = SIGEV_SIGNAL;
local_evp.sigev_signo = SIGALRM;
local_evp.sigev_value.sival_ptr = newp;
evp = &local_evp;
}
kernel_timer_t ktimerid;
int retval = INLINE_SYSCALL (timer_create, 3, syscall_clockid, evp,
&ktimerid);
if (retval != -1)
{
newp->sigev_notify = (evp != NULL
? evp->sigev_notify : SIGEV_SIGNAL);
newp->ktimerid = ktimerid;
*timerid = (timer_t) newp;
}
else
{
/* Cannot allocate the timer, fail. */
free (newp);
retval = -1;
}
return retval;
}
else
{
/* Create the helper thread. */
pthread_once (&__helper_once, __start_helper_thread);
if (__helper_tid == 0)
{
/* No resources to start the helper thread. */
__set_errno (EAGAIN);
return -1;
}
if (evp == NULL)
{
/* The kernel has to pass up the timer ID which is a
userlevel object. Therefore we cannot leave it up to
the kernel to determine it. */
local_evp.sigev_notify = SIGEV_SIGNAL;
local_evp.sigev_signo = SIGALRM;
local_evp.sigev_value.sival_ptr = newp;
struct timer *newp;
newp = (struct timer *) malloc (sizeof (struct timer));
if (newp == NULL)
return -1;
evp = &local_evp;
}
/* Copy the thread parameters the user provided. */
newp->sival = evp->sigev_value;
newp->thrfunc = evp->sigev_notify_function;
newp->sigev_notify = SIGEV_THREAD;
kernel_timer_t ktimerid;
int retval = INLINE_SYSCALL (timer_create, 3, syscall_clockid, evp,
&ktimerid);
/* We cannot simply copy the thread attributes since the
implementation might keep internal information for
each instance. */
(void) pthread_attr_init (&newp->attr);
if (evp->sigev_notify_attributes != NULL)
{
struct pthread_attr *nattr;
struct pthread_attr *oattr;
# ifndef __ASSUME_POSIX_TIMERS
if (retval != -1 || errno != ENOSYS)
# endif
{
# ifndef __ASSUME_POSIX_TIMERS
__no_posix_timers = 1;
# endif
nattr = (struct pthread_attr *) &newp->attr;
oattr = (struct pthread_attr *) evp->sigev_notify_attributes;
if (retval != -1)
{
newp->sigev_notify = (evp != NULL
? evp->sigev_notify : SIGEV_SIGNAL);
newp->ktimerid = ktimerid;
nattr->schedparam = oattr->schedparam;
nattr->schedpolicy = oattr->schedpolicy;
nattr->flags = oattr->flags;
nattr->guardsize = oattr->guardsize;
nattr->stackaddr = oattr->stackaddr;
nattr->stacksize = oattr->stacksize;
}
*timerid = (timer_t) newp;
}
else
{
/* Cannot allocate the timer, fail. */
free (newp);
retval = -1;
}
/* In any case set the detach flag. */
(void) pthread_attr_setdetachstate (&newp->attr,
PTHREAD_CREATE_DETACHED);
return retval;
}
/* Create the event structure for the kernel timer. */
struct sigevent sev =
{ .sigev_value.sival_ptr = newp,
.sigev_signo = SIGTIMER,
.sigev_notify = SIGEV_SIGNAL | SIGEV_THREAD_ID,
._sigev_un = { ._pad = { [0] = __helper_tid } } };
free (newp);
/* Create the timer. */
INTERNAL_SYSCALL_DECL (err);
int res;
res = INTERNAL_SYSCALL (timer_create, err, 3,
syscall_clockid, &sev, &newp->ktimerid);
if (! INTERNAL_SYSCALL_ERROR_P (res, err))
{
/* Add to the queue of active timers with thread
delivery. */
pthread_mutex_lock (&__active_timer_sigev_thread_lock);
newp->next = __active_timer_sigev_thread;
__active_timer_sigev_thread = newp;
pthread_mutex_unlock (&__active_timer_sigev_thread_lock);
# ifndef __ASSUME_POSIX_TIMERS
/* When we come here the syscall does not exist. Make sure we
do not try to use it again. */
__no_posix_timers = -1;
# endif
}
else
{
# ifndef __ASSUME_POSIX_TIMERS
/* Make sure we have the necessary kernel support. */
if (__no_posix_timers == 0)
{
INTERNAL_SYSCALL_DECL (err);
struct timespec ts;
int res;
res = INTERNAL_SYSCALL (clock_getres, err, 2,
CLOCK_REALTIME, &ts);
__no_posix_timers = (INTERNAL_SYSCALL_ERROR_P (res, err)
? -1 : 1);
}
*timerid = (timer_t) newp;
return 0;
}
if (__no_posix_timers > 0)
# endif
{
/* Create the helper thread. */
pthread_once (&__helper_once, __start_helper_thread);
if (__helper_tid == 0)
{
/* No resources to start the helper thread. */
__set_errno (EAGAIN);
return -1;
}
/* Free the resources. */
free (newp);
struct timer *newp;
newp = (struct timer *) malloc (sizeof (struct timer));
if (newp == NULL)
return -1;
__set_errno (INTERNAL_SYSCALL_ERRNO (res, err));
/* Copy the thread parameters the user provided. */
newp->sival = evp->sigev_value;
newp->thrfunc = evp->sigev_notify_function;
newp->sigev_notify = SIGEV_THREAD;
/* We cannot simply copy the thread attributes since the
implementation might keep internal information for
each instance. */
(void) pthread_attr_init (&newp->attr);
if (evp->sigev_notify_attributes != NULL)
{
struct pthread_attr *nattr;
struct pthread_attr *oattr;
nattr = (struct pthread_attr *) &newp->attr;
oattr = (struct pthread_attr *) evp->sigev_notify_attributes;
nattr->schedparam = oattr->schedparam;
nattr->schedpolicy = oattr->schedpolicy;
nattr->flags = oattr->flags;
nattr->guardsize = oattr->guardsize;
nattr->stackaddr = oattr->stackaddr;
nattr->stacksize = oattr->stacksize;
}
/* In any case set the detach flag. */
(void) pthread_attr_setdetachstate (&newp->attr,
PTHREAD_CREATE_DETACHED);
/* Create the event structure for the kernel timer. */
struct sigevent sev =
{ .sigev_value.sival_ptr = newp,
.sigev_signo = SIGTIMER,
.sigev_notify = SIGEV_SIGNAL | SIGEV_THREAD_ID,
._sigev_un = { ._pad = { [0] = __helper_tid } } };
/* Create the timer. */
INTERNAL_SYSCALL_DECL (err);
int res;
res = INTERNAL_SYSCALL (timer_create, err, 3,
syscall_clockid, &sev, &newp->ktimerid);
if (! INTERNAL_SYSCALL_ERROR_P (res, err))
{
/* Add to the queue of active timers with thread
delivery. */
pthread_mutex_lock (&__active_timer_sigev_thread_lock);
newp->next = __active_timer_sigev_thread;
__active_timer_sigev_thread = newp;
pthread_mutex_unlock (&__active_timer_sigev_thread_lock);
*timerid = (timer_t) newp;
return 0;
}
/* Free the resources. */
free (newp);
__set_errno (INTERNAL_SYSCALL_ERRNO (res, err));
return -1;
}
}
}
# ifndef __ASSUME_POSIX_TIMERS
/* Compatibility code. */
return compat_timer_create (clock_id, evp, timerid);
# endif
return -1;
}
}
}
#else
# ifdef timer_create_alias
# define timer_create timer_create_alias
# endif
/* The new system calls are not available. Use the userlevel
implementation. */
# include <nptl/sysdeps/pthread/timer_create.c>
#endif

106
nptl/sysdeps/unix/sysv/linux/timer_delete.c
View File

@ -1,4 +1,4 @@
/* Copyright (C) 2003, 2007 Free Software Foundation, Inc.
/* Copyright (C) 2003-2012 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
@ -24,91 +24,51 @@
#include "kernel-posix-timers.h"
#ifdef __NR_timer_delete
# ifndef __ASSUME_POSIX_TIMERS
static int compat_timer_delete (timer_t timerid);
# define timer_delete static compat_timer_delete
# include <nptl/sysdeps/pthread/timer_delete.c>
# undef timer_delete
# endif
# ifdef timer_delete_alias
# define timer_delete timer_delete_alias
# endif
#ifdef timer_delete_alias
# define timer_delete timer_delete_alias
#endif
int
timer_delete (timerid)
timer_t timerid;
{
# undef timer_delete
# ifndef __ASSUME_POSIX_TIMERS
if (__no_posix_timers >= 0)
# endif
#undef timer_delete
struct timer *kt = (struct timer *) timerid;
/* Delete the kernel timer object. */
int res = INLINE_SYSCALL (timer_delete, 1, kt->ktimerid);
if (res == 0)
{
struct timer *kt = (struct timer *) timerid;
/* Delete the kernel timer object. */
int res = INLINE_SYSCALL (timer_delete, 1, kt->ktimerid);
if (res == 0)
if (kt->sigev_notify == SIGEV_THREAD)
{
if (kt->sigev_notify == SIGEV_THREAD)
/* Remove the timer from the list. */
pthread_mutex_lock (&__active_timer_sigev_thread_lock);
if (__active_timer_sigev_thread == kt)
__active_timer_sigev_thread = kt->next;
else
{
/* Remove the timer from the list. */
pthread_mutex_lock (&__active_timer_sigev_thread_lock);
if (__active_timer_sigev_thread == kt)
__active_timer_sigev_thread = kt->next;
else
{
struct timer *prevp = __active_timer_sigev_thread;
while (prevp->next != NULL)
if (prevp->next == kt)
{
prevp->next = kt->next;
break;
}
else
prevp = prevp->next;
}
pthread_mutex_unlock (&__active_timer_sigev_thread_lock);
struct timer *prevp = __active_timer_sigev_thread;
while (prevp->next != NULL)
if (prevp->next == kt)
{
prevp->next = kt->next;
break;
}
else
prevp = prevp->next;
}
# ifndef __ASSUME_POSIX_TIMERS
/* We know the syscall support is available. */
__no_posix_timers = 1;
# endif
/* Free the memory. */
(void) free (kt);
return 0;
pthread_mutex_unlock (&__active_timer_sigev_thread_lock);
}
/* The kernel timer is not known or something else bad happened.
Return the error. */
# ifndef __ASSUME_POSIX_TIMERS
if (errno != ENOSYS)
{
__no_posix_timers = 1;
# endif
return -1;
# ifndef __ASSUME_POSIX_TIMERS
}
/* Free the memory. */
(void) free (kt);
__no_posix_timers = -1;
# endif
return 0;
}
# ifndef __ASSUME_POSIX_TIMERS
return compat_timer_delete (timerid);
# endif
/* The kernel timer is not known or something else bad happened.
Return the error. */
return -1;
}
#else
# ifdef timer_delete_alias
# define timer_delete timer_delete_alias
# endif
/* The new system calls are not available. Use the userlevel
implementation. */
# include <nptl/sysdeps/pthread/timer_delete.c>
#endif

56
nptl/sysdeps/unix/sysv/linux/timer_getoverr.c
View File

@ -1,4 +1,4 @@
/* Copyright (C) 2003 Free Software Foundation, Inc.
/* Copyright (C) 2003-2012 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
@ -23,58 +23,20 @@
#include "kernel-posix-timers.h"
#ifdef __NR_timer_getoverrun
# ifndef __ASSUME_POSIX_TIMERS
static int compat_timer_getoverrun (timer_t timerid);
# define timer_getoverrun static compat_timer_getoverrun
# include <nptl/sysdeps/pthread/timer_getoverr.c>
# undef timer_getoverrun
# endif
# ifdef timer_getoverrun_alias
# define timer_getoverrun timer_getoverrun_alias
# endif
#ifdef timer_getoverrun_alias
# define timer_getoverrun timer_getoverrun_alias
#endif
int
timer_getoverrun (timerid)
timer_t timerid;
{
# undef timer_getoverrun
# ifndef __ASSUME_POSIX_TIMERS
if (__no_posix_timers >= 0)
# endif
{
struct timer *kt = (struct timer *) timerid;
#undef timer_getoverrun
struct timer *kt = (struct timer *) timerid;
/* Get the information from the kernel. */
int res = INLINE_SYSCALL (timer_getoverrun, 1, kt->ktimerid);
/* Get the information from the kernel. */
int res = INLINE_SYSCALL (timer_getoverrun, 1, kt->ktimerid);
# ifndef __ASSUME_POSIX_TIMERS
if (res != -1 || errno != ENOSYS)
{
/* We know the syscall support is available. */
__no_posix_timers = 1;
# endif
return res;
# ifndef __ASSUME_POSIX_TIMERS
}
# endif
# ifndef __ASSUME_POSIX_TIMERS
__no_posix_timers = -1;
# endif
}
# ifndef __ASSUME_POSIX_TIMERS
return compat_timer_getoverrun (timerid);
# endif
return res;
}
#else
# ifdef timer_getoverrun_alias
# define timer_getoverrun timer_getoverrun_alias
# endif
/* The new system calls are not available. Use the userlevel
implementation. */
# include <nptl/sysdeps/pthread/timer_getoverr.c>
#endif

56
nptl/sysdeps/unix/sysv/linux/timer_gettime.c
View File

@ -1,4 +1,4 @@
/* Copyright (C) 2003 Free Software Foundation, Inc.
/* Copyright (C) 2003-2012 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
@ -24,17 +24,9 @@
#include "kernel-posix-timers.h"
#ifdef __NR_timer_gettime
# ifndef __ASSUME_POSIX_TIMERS
static int compat_timer_gettime (timer_t timerid, struct itimerspec *value);
# define timer_gettime static compat_timer_gettime
# include <nptl/sysdeps/pthread/timer_gettime.c>
# undef timer_gettime
# endif
# ifdef timer_gettime_alias
# define timer_gettime timer_gettime_alias
# endif
#ifdef timer_gettime_alias
# define timer_gettime timer_gettime_alias
#endif
int
@ -42,41 +34,11 @@ timer_gettime (timerid, value)
timer_t timerid;
struct itimerspec *value;
{
# undef timer_gettime
# ifndef __ASSUME_POSIX_TIMERS
if (__no_posix_timers >= 0)
# endif
{
struct timer *kt = (struct timer *) timerid;
#undef timer_gettime
struct timer *kt = (struct timer *) timerid;
/* Delete the kernel timer object. */
int res = INLINE_SYSCALL (timer_gettime, 2, kt->ktimerid, value);
/* Delete the kernel timer object. */
int res = INLINE_SYSCALL (timer_gettime, 2, kt->ktimerid, value);
# ifndef __ASSUME_POSIX_TIMERS
if (res != -1 || errno != ENOSYS)
{
/* We know the syscall support is available. */
__no_posix_timers = 1;
# endif
return res;
# ifndef __ASSUME_POSIX_TIMERS
}
# endif
# ifndef __ASSUME_POSIX_TIMERS
__no_posix_timers = -1;
# endif
}
# ifndef __ASSUME_POSIX_TIMERS
return compat_timer_gettime (timerid, value);
# endif
return res;
}
#else
# ifdef timer_gettime_alias
# define timer_gettime timer_gettime_alias
# endif
/* The new system calls are not available. Use the userlevel
implementation. */
# include <nptl/sysdeps/pthread/timer_gettime.c>
#endif

8
nptl/sysdeps/unix/sysv/linux/timer_routines.c
View File

@ -1,4 +1,4 @@
/* Copyright (C) 2003-2007, 2011 Free Software Foundation, Inc.
/* Copyright (C) 2003-2012 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
@ -39,7 +39,6 @@ struct thread_start_data
};
#ifdef __NR_timer_create
/* Helper thread to call the user-provided function. */
static void *
timer_sigev_thread (void *arg)
@ -196,8 +195,3 @@ __start_helper_thread (void)
be created. */
pthread_atfork (NULL, NULL, reset_helper_control);
}
#endif
#ifndef __ASSUME_POSIX_TIMERS
# include <nptl/sysdeps/pthread/timer_routines.c>
#endif

60
nptl/sysdeps/unix/sysv/linux/timer_settime.c
View File

@ -1,4 +1,4 @@
/* Copyright (C) 2003 Free Software Foundation, Inc.
/* Copyright (C) 2003-2012 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
@ -24,19 +24,9 @@
#include "kernel-posix-timers.h"
#ifdef __NR_timer_settime
# ifndef __ASSUME_POSIX_TIMERS
static int compat_timer_settime (timer_t timerid, int flags,
const struct itimerspec *value,
struct itimerspec *ovalue);
# define timer_settime static compat_timer_settime
# include <nptl/sysdeps/pthread/timer_settime.c>
# undef timer_settime
# endif
# ifdef timer_settime_alias
# define timer_settime timer_settime_alias
# endif
#ifdef timer_settime_alias
# define timer_settime timer_settime_alias
#endif
int
@ -46,42 +36,12 @@ timer_settime (timerid, flags, value, ovalue)
const struct itimerspec *value;
struct itimerspec *ovalue;
{
# undef timer_settime
# ifndef __ASSUME_POSIX_TIMERS
if (__no_posix_timers >= 0)
# endif
{
struct timer *kt = (struct timer *) timerid;
#undef timer_settime
struct timer *kt = (struct timer *) timerid;
/* Delete the kernel timer object. */
int res = INLINE_SYSCALL (timer_settime, 4, kt->ktimerid, flags,
value, ovalue);
/* Delete the kernel timer object. */
int res = INLINE_SYSCALL (timer_settime, 4, kt->ktimerid, flags,
value, ovalue);
# ifndef __ASSUME_POSIX_TIMERS
if (res != -1 || errno != ENOSYS)
{
/* We know the syscall support is available. */
__no_posix_timers = 1;
# endif
return res;
# ifndef __ASSUME_POSIX_TIMERS
}
# endif
# ifndef __ASSUME_POSIX_TIMERS
__no_posix_timers = -1;
# endif
}
# ifndef __ASSUME_POSIX_TIMERS
return compat_timer_settime (timerid, flags, value, ovalue);
# endif
return res;
}
#else
# ifdef timer_settime_alias
# define timer_settime timer_settime_alias
# endif
/* The new system calls are not available. Use the userlevel
implementation. */
# include <nptl/sysdeps/pthread/timer_settime.c>
#endif

30
nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S
View File

@ -457,10 +457,6 @@ __pthread_cond_timedwait:
movl $__NR_clock_gettime, %eax
syscall
# endif
# ifndef __ASSUME_POSIX_TIMERS
cmpq $-ENOSYS, %rax
je 19f
# endif
/* Compute relative timeout. */
movq (%r13), %rcx
@ -604,32 +600,6 @@ __pthread_cond_timedwait:
subq $cond_lock, %rdi
# endif
jmp 6b
# if defined __NR_clock_gettime && !defined __ASSUME_POSIX_TIMERS
/* clock_gettime not available. */
19: leaq 32(%rsp), %rdi
xorl %esi, %esi
/* This call works because we directly jump to a system call entry
which preserves all the registers. */
call JUMPTARGET(__gettimeofday)
/* Compute relative timeout. */
movq 40(%rsp), %rax
movl $1000, %edx
mul %rdx /* Milli seconds to nano seconds. */
movq (%r13), %rcx
movq 8(%r13), %rdx
subq 32(%rsp), %rcx
subq %rax, %rdx
jns 20f
addq $1000000000, %rdx
decq %rcx
20: testq %rcx, %rcx
movq 8(%rsp), %rdi
movq $-ETIMEDOUT, %r14
js 6b
jmp 21b
# endif
#endif
.size __pthread_cond_timedwait, .-__pthread_cond_timedwait
versioned_symbol (libpthread, __pthread_cond_timedwait, pthread_cond_timedwait,

46
sysdeps/unix/sysv/linux/clock_getcpuclockid.c
View File

@ -1,5 +1,5 @@
/* clock_getcpuclockid -- Get a clockid_t for process CPU time. Linux version.
Copyright (C) 2004, 2005, 2006 Free Software Foundation, Inc.
Copyright (C) 2004-2012 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
@ -37,11 +37,6 @@ clock_getcpuclockid (pid_t pid, clockid_t *clock_id)
# 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
{
@ -53,33 +48,24 @@ clock_getcpuclockid (pid_t pid, clockid_t *clock_id)
return 0;
}
# if !(__ASSUME_POSIX_TIMERS > 0)
if (INTERNAL_SYSCALL_ERRNO (r, err) == ENOSYS)
if (INTERNAL_SYSCALL_ERRNO (r, err) == EINVAL)
{
/* The kernel doesn't support these calls at all. */
__libc_missing_posix_timers = 1;
__libc_missing_posix_cpu_timers = 1;
# 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
# 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);
return INTERNAL_SYSCALL_ERRNO (r, err);
}
#endif

88
sysdeps/unix/sysv/linux/clock_getres.c
View File

@ -1,5 +1,5 @@
/* clock_getres -- Get the resolution of a POSIX clockid_t. Linux version.
Copyright (C) 2003,2004,2005,2006,2008,2010 Free Software Foundation, Inc.
Copyright (C) 2003-2012 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
@ -35,11 +35,9 @@
retval = INLINE_VSYSCALL (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 \
/* The REALTIME and MONOTONIC clock are definitely supported in the
kernel. */
#define SYSDEP_GETRES \
SYSDEP_GETRES_CPUTIME \
case CLOCK_REALTIME: \
case CLOCK_MONOTONIC: \
@ -48,57 +46,6 @@
case CLOCK_MONOTONIC_COARSE: \
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_VSYSCALL (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 \
SYSDEP_GETRES_CPUTIME \
case CLOCK_REALTIME: \
case CLOCK_MONOTONIC: \
case CLOCK_MONOTONIC_RAW: \
case CLOCK_REALTIME_COARSE: \
case CLOCK_MONOTONIC_COARSE: \
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
@ -126,26 +73,15 @@ maybe_syscall_getres_cpu (clockid_t clock_id, struct timespec *res)
return 0;
e = INTERNAL_SYSCALL_ERRNO (r, err);
# ifndef __ASSUME_POSIX_TIMERS
if (e == ENOSYS)
if (e == EINVAL)
{
__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_VSYSCALL (clock_getres, err, 2,
MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED),
NULL);
if (INTERNAL_SYSCALL_ERROR_P (r, err))
__libc_missing_posix_cpu_timers = 1;
}
/* Check whether the kernel supports CPU clocks at all.
If not, record it for the future. */
r = INTERNAL_VSYSCALL (clock_getres, err, 2,
MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED),
NULL);
if (INTERNAL_SYSCALL_ERROR_P (r, err))
__libc_missing_posix_cpu_timers = 1;
}
}

98
sysdeps/unix/sysv/linux/clock_gettime.c
View File

@ -1,5 +1,5 @@
/* clock_gettime -- Get current time from a POSIX clockid_t. Linux version.
Copyright (C) 2003,2004,2005,2006,2007,2010,2011 Free Software Foundation, Inc.
Copyright (C) 2003-2012 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
@ -40,68 +40,15 @@
INTERNAL_VSYSCALL (clock_gettime, err, 2, id, tp)
#endif
#ifdef __ASSUME_POSIX_TIMERS
/* This means the REALTIME and MONOTONIC clock are definitely
supported in the kernel. */
# define SYSDEP_GETTIME \
/* The REALTIME and MONOTONIC clock are definitely supported in the
kernel. */
#define SYSDEP_GETTIME \
SYSDEP_GETTIME_CPUTIME; \
case CLOCK_REALTIME: \
case CLOCK_MONOTONIC: \
retval = SYSCALL_GETTIME (clock_id, tp); \
break
# 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_GETTIME (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 \
SYSDEP_GETTIME_CPUTIME; \
case CLOCK_REALTIME: \
case CLOCK_MONOTONIC: \
case CLOCK_MONOTONIC_RAW: \
case CLOCK_REALTIME_COARSE: \
case CLOCK_MONOTONIC_COARSE: \
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
@ -131,34 +78,23 @@ maybe_syscall_gettime_cpu (clockid_t clock_id, struct timespec *tp)
return 0;
e = INTERNAL_SYSCALL_ERRNO (r, err);
# ifndef __ASSUME_POSIX_TIMERS
if (e == ENOSYS)
if (e == EINVAL)
{
__libc_missing_posix_timers = 1;
__libc_missing_posix_cpu_timers = 1;
e = EINVAL;
}
else
# endif
{
if (e == EINVAL)
{
# ifdef HAVE_CLOCK_GETRES_VSYSCALL
/* Check whether the kernel supports CPU clocks at all.
If not, record it for the future. */
r = INTERNAL_VSYSCALL (clock_getres, err, 2,
MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED),
NULL);
/* Check whether the kernel supports CPU clocks at all.
If not, record it for the future. */
r = INTERNAL_VSYSCALL (clock_getres, err, 2,
MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED),
NULL);
# else
/* 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);
/* 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);
# endif
if (INTERNAL_SYSCALL_ERROR_P (r, err))
__libc_missing_posix_cpu_timers = 1;
}
if (INTERNAL_SYSCALL_ERROR_P (r, err))
__libc_missing_posix_cpu_timers = 1;
}
}

43
sysdeps/unix/sysv/linux/clock_nanosleep.c
View File

@ -1,4 +1,4 @@
/* Copyright (C) 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
/* Copyright (C) 2003-2012 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
@ -23,7 +23,6 @@
#include "kernel-posix-cpu-timers.h"
#ifdef __ASSUME_POSIX_TIMERS
/* We can simply use the syscall. The CPU clocks are not supported
with this function. */
int
@ -53,43 +52,3 @@ clock_nanosleep (clockid_t clock_id, int flags, const struct timespec *req,
return (INTERNAL_SYSCALL_ERROR_P (r, err)
? INTERNAL_SYSCALL_ERRNO (r, err) : 0);
}
#else
# ifdef __NR_clock_nanosleep
/* Is the syscall known to exist? */
extern int __libc_missing_posix_timers attribute_hidden;
/* The REALTIME and MONOTONIC clock might be available. Try the
syscall first. */
# 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, \
syscall_clockid, flags, req, rem); \
\
LIBC_CANCEL_RESET (oldstate); \
\
if (!INTERNAL_SYSCALL_ERROR_P (r, err)) \
return 0; \
\
if (INTERNAL_SYSCALL_ERRNO (r, err) != ENOSYS) \
return INTERNAL_SYSCALL_ERRNO (r, err); \
\
__libc_missing_posix_timers = 1; \
}
# endif
# include <sysdeps/unix/clock_nanosleep.c>
#endif

74
sysdeps/unix/sysv/linux/clock_settime.c
View File

@ -32,7 +32,6 @@
#endif
#if __ASSUME_POSIX_CPU_TIMERS <= 0 && defined __NR_clock_settime
extern int __libc_missing_posix_timers attribute_hidden;
extern int __libc_missing_posix_cpu_timers attribute_hidden;
static int
@ -48,26 +47,15 @@ maybe_syscall_settime_cpu (clockid_t clock_id, const struct timespec *tp)
return 0;
e = INTERNAL_SYSCALL_ERRNO (r, err);
# ifndef __ASSUME_POSIX_TIMERS
if (e == ENOSYS)
if (e == EINVAL)
{
__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_VSYSCALL (clock_getres, err, 2,
MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED),
NULL);
if (INTERNAL_SYSCALL_ERROR_P (r, err))
__libc_missing_posix_cpu_timers = 1;
}
/* Check whether the kernel supports CPU clocks at all.
If not, record it for the future. */
r = INTERNAL_VSYSCALL (clock_getres, err, 2,
MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED),
NULL);
if (INTERNAL_SYSCALL_ERROR_P (r, err))
__libc_missing_posix_cpu_timers = 1;
}
}
@ -76,53 +64,11 @@ maybe_syscall_settime_cpu (clockid_t clock_id, const struct timespec *tp)
#endif
#ifdef __ASSUME_POSIX_TIMERS
/* This means the REALTIME clock is definitely supported in the
kernel. */
# define SYSDEP_SETTIME \
/* The REALTIME clock is definitely supported in the kernel. */
#define SYSDEP_SETTIME \
case CLOCK_REALTIME: \
retval = INLINE_SYSCALL (clock_settime, 2, clock_id, tp); \
break
#elif defined __NR_clock_settime
/* Is the syscall known to exist? */
extern int __libc_missing_posix_timers attribute_hidden;
/* The REALTIME clock might be available. Try the syscall first. */
# define SYSDEP_SETTIME \
case CLOCK_REALTIME: \
case CLOCK_REALTIME_COARSE: \
{ \
int e = EINVAL; \
\
if (!__libc_missing_posix_timers) \
{ \
INTERNAL_SYSCALL_DECL (err); \
int r = INTERNAL_SYSCALL (clock_settime, 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); \
retval = -1; \
} \
} \
break
#endif
#ifdef __NR_clock_settime
/* We handled the REALTIME clock here. */

4
sysdeps/unix/sysv/linux/kernel-features.h
View File

@ -92,10 +92,6 @@
# define __ASSUME_MMAP2_SYSCALL 1
#endif
/* Beginning with 2.5.63 support for realtime and monotonic clocks and
timers based on them is available. */
#define __ASSUME_POSIX_TIMERS 1
/* Beginning with 2.6.12 the clock and timer supports CPU clocks. */
#define __ASSUME_POSIX_CPU_TIMERS 1