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| author | Ulrich Drepper <drepper@redhat.com> | 2009-01-03 05:06:46 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2009-01-03 05:06:46 +0000 |
| commit | cbd8aeb836c8061c23a5e00419e0fb25a34abee7 (patch) | |
| tree | 3f205876a4edffbc06a9474542dfe2a8cdcb27a4 /nptl/init.c | |
| parent | 7dd650d7fc8191aa99c14602b9a44bccb276d4f8 (diff) | |
| download | glibc-cbd8aeb836c8061c23a5e00419e0fb25a34abee7.tar.gz glibc-cbd8aeb836c8061c23a5e00419e0fb25a34abee7.tar.xz glibc-cbd8aeb836c8061c23a5e00419e0fb25a34abee7.zip | |
* init.c (__pthread_initialize_minimal_internal): Check for
FUTEX_CLOCK_REALTIME flag. * sysdeps/unix/sysv/linux/x86_64/lowlevellock.S (__lll_timedlock_wait): Use FUTEX_WAIT_BITSET|FUTEX_CLOCK_READTIME instead of computing relative timeout.
Diffstat (limited to 'nptl/init.c')
| -rw-r--r-- | nptl/init.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/nptl/init.c b/nptl/init.c index d445de0795..af5bb24b59 100644 --- a/nptl/init.c +++ b/nptl/init.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2002,2003,2004,2005,2006,2007 Free Software Foundation, Inc. +/* Copyright (C) 2002-2007, 2008, 2009 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. @@ -18,6 +18,7 @@ 02111-1307 USA. */ #include <assert.h> +#include <errno.h> #include <limits.h> #include <signal.h> #include <stdlib.h> @@ -49,6 +50,15 @@ int __set_robust_list_avail; # define set_robust_list_not_avail() do { } while (0) #endif +#ifndef __ASSUME_FUTEX_CLOCK_REALTIME +/* Nonzero if we do not have FUTEX_CLOCK_REALTIME. */ +int __have_futex_clock_realtime; +# define __set_futex_clock_realtime() \ + __have_futex_clock_realtime = 1 +#else +#define __set_futex_clock_realtime() do { } while (0) +#endif + /* Version of the library, used in libthread_db to detect mismatches. */ static const char nptl_version[] __attribute_used__ = VERSION; @@ -292,6 +302,20 @@ __pthread_initialize_minimal_internal (void) } #endif +#ifndef __ASSUME_FUTEX_CLOCK_REALTIME + { + int word = 0; + word = INTERNAL_SYSCALL (futex, err, 6, &word, + FUTEX_WAIT_BITSET | FUTEX_CLOCK_REALTIME + | FUTEX_PRIVATE_FLAG, 1, NULL, 0, + FUTEX_BITSET_MATCH_ANY); + if (!INTERNAL_SYSCALL_ERROR_P (word, err) + || (INTERNAL_SYSCALL_ERRNO (word, err) != ENOSYS + && INTERNAL_SYSCALL_ERRNO (word, err) != EINVAL)) + __set_futex_clock_realtime (); + } +#endif + /* Set initial thread's stack block from 0 up to __libc_stack_end. It will be bigger than it actually is, but for unwind.c/pt-longjmp.c purposes this is good enough. */ |