1 /* Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
22 #include <sysdep-cancel.h>
23 #include "kernel-features.h"
24 #include "kernel-posix-cpu-timers.h"
27 #ifdef __ASSUME_POSIX_TIMERS
28 /* We can simply use the syscall. The CPU clocks are not supported
29 with this function. */
31 clock_nanosleep (clockid_t clock_id
, int flags
, const struct timespec
*req
,
34 INTERNAL_SYSCALL_DECL (err
);
37 if (clock_id
== CLOCK_THREAD_CPUTIME_ID
)
39 if (clock_id
== CLOCK_PROCESS_CPUTIME_ID
)
40 clock_id
= MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED
);
43 r
= INTERNAL_SYSCALL (clock_nanosleep
, err
, 4, clock_id
, flags
, req
, rem
);
46 int oldstate
= LIBC_CANCEL_ASYNC ();
48 r
= INTERNAL_SYSCALL (clock_nanosleep
, err
, 4, clock_id
, flags
, req
,
51 LIBC_CANCEL_RESET (oldstate
);
54 return (INTERNAL_SYSCALL_ERROR_P (r
, err
)
55 ? INTERNAL_SYSCALL_ERRNO (r
, err
) : 0);
59 # ifdef __NR_clock_nanosleep
60 /* Is the syscall known to exist? */
61 extern int __libc_missing_posix_timers attribute_hidden
;
63 /* The REALTIME and MONOTONIC clock might be available. Try the
65 # define SYSDEP_NANOSLEEP \
66 if (!__libc_missing_posix_timers) \
68 clockid_t syscall_clockid; \
69 INTERNAL_SYSCALL_DECL (err); \
71 if (clock_id == CLOCK_THREAD_CPUTIME_ID) \
73 if (clock_id == CLOCK_PROCESS_CPUTIME_ID) \
74 syscall_clockid = MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED); \
76 syscall_clockid = clock_id; \
78 int oldstate = LIBC_CANCEL_ASYNC (); \
80 int r = INTERNAL_SYSCALL (clock_nanosleep, err, 4, \
81 syscall_clockid, flags, req, rem); \
83 LIBC_CANCEL_RESET (oldstate); \
85 if (!INTERNAL_SYSCALL_ERROR_P (r, err)) \
88 if (INTERNAL_SYSCALL_ERRNO (r, err) != ENOSYS) \
89 return INTERNAL_SYSCALL_ERRNO (r, err); \
91 __libc_missing_posix_timers = 1; \
95 # include <sysdeps/unix/clock_nanosleep.c>