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authorUlrich Drepper <drepper@redhat.com>2003-03-03 04:57:09 +0000
committerUlrich Drepper <drepper@redhat.com>2003-03-03 04:57:09 +0000
commitad0e8eb0a565a44fe9616354d4e7556c3df9ae76 (patch)
treec74ddbeeded7e73a8ec30de6a3387bea066791af /sysdeps/unix/sysv/linux/clock_nanosleep.c
parent1e543c0cc620324b04da6891b9b7848da8704411 (diff)
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Update.
2003-03-02 Ulrich Drepper <drepper@redhat.com> * sysdeps/unix/sysv/linux/bits/posix_opt.h: Define _POSIX_MONOTONIC_CLOCK. * linuxthreads/sysdeps/unix/sysv/linux/i386/bits/posix_opt.h: Likewise.
Diffstat (limited to 'sysdeps/unix/sysv/linux/clock_nanosleep.c')
-rw-r--r--sysdeps/unix/sysv/linux/clock_nanosleep.c65
1 files changed, 65 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/clock_nanosleep.c b/sysdeps/unix/sysv/linux/clock_nanosleep.c
new file mode 100644
index 0000000000..ceb3801eb9
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/clock_nanosleep.c
@@ -0,0 +1,65 @@
+/* Copyright (C) 2003 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 <time.h>
+
+#include <sysdep.h>
+#include "kernel-features.h"
+
+
+#ifdef __ASSUME_POSIX_TIMERS
+/* We can simply use the syscall. The CPU clocks are not supported
+ with this function. */
+int
+clock_nanosleep (clockid_t clock_id, int flags, const struct timespec *req,
+ struct timespec *rem)
+{
+ INTERNAL_SYSCALL_DECL (err);
+ int r;
+
+ r = INTERNAL_SYSCALL (clock_nanosleep, err, 4, clock_id, flags, req, rem);
+ 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) \
+ { \
+ INTERNAL_SYSCALL_DECL (err); \
+ int r = INTERNAL_SYSCALL (clock_nanosleep, err, 4, clock_id, flags, \
+ req, rem); \
+ \
+ 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