1 /* Copyright (C) 2003-2018 Free Software Foundation, Inc.
2
3 The GNU C Library is free software; you can redistribute it and/or
4 modify it under the terms of the GNU Lesser General Public
5 License as published by the Free Software Foundation; either
6 version 2.1 of the License, or (at your option) any later version.
7
8 The GNU C Library is distributed in the hope that it will be useful,
9 but WITHOUT ANY WARRANTY; without even the implied warranty of
10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 Lesser General Public License for more details.
12
13 You should have received a copy of the GNU Lesser General Public
14 License along with the GNU C Library; if not, see
15 <http://www.gnu.org/licenses/>. */
16
17 #include <time.h>
18 #include <errno.h>
19 #include <cancel.h>
20 #include <sys/syscall.h>
21
22 #include "kernel-posix-cpu-timers.h"
23
24 #if defined(__UCLIBC_USE_TIME64__)
25 #include "internal/time64_helpers.h"
26 #endif
27
28 /* We can simply use the syscall. The CPU clocks are not supported
29 with this function. */
30 int
clock_nanosleep(clockid_t clock_id,int flags,const struct timespec * req,struct timespec * rem)31 clock_nanosleep (clockid_t clock_id, int flags, const struct timespec *req,
32 struct timespec *rem)
33 {
34 INTERNAL_SYSCALL_DECL (err);
35 int r;
36
37 if (clock_id == CLOCK_THREAD_CPUTIME_ID)
38 return EINVAL;
39 if (clock_id == CLOCK_PROCESS_CPUTIME_ID)
40 clock_id = MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED);
41
42 if (SINGLE_THREAD_P) {
43 #if defined(__UCLIBC_USE_TIME64__) && defined(__NR_clock_nanosleep_time64)
44 struct __ts64_struct __req, __rem;
45 __req.tv_sec = req->tv_sec;
46 __req.tv_nsec = req->tv_nsec;
47 r = INTERNAL_SYSCALL (clock_nanosleep_time64, err, 4, clock_id, flags, &__req, &__rem);
48 if (rem) {
49 rem->tv_sec = (time_t) __rem.tv_sec;
50 rem->tv_nsec = __rem.tv_nsec;
51 }
52 #else
53 r = INTERNAL_SYSCALL (clock_nanosleep, err, 4, clock_id, flags, req, rem);
54 #endif
55 }
56 else
57 {
58 #ifdef __NEW_THREADS
59 int oldstate = LIBC_CANCEL_ASYNC ();
60 #if defined(__UCLIBC_USE_TIME64__) && defined(__NR_clock_nanosleep_time64)
61 struct __ts64_struct __req, __rem;
62 __req.tv_sec = req->tv_sec;
63 __req.tv_nsec = req->tv_nsec;
64 r = INTERNAL_SYSCALL (clock_nanosleep_time64, err, 4, clock_id, flags, &__req, &__rem);
65 if (rem) {
66 rem->tv_sec = (time_t) __rem.tv_sec;
67 rem->tv_nsec = __rem.tv_nsec;
68 }
69 #else
70 r = INTERNAL_SYSCALL (clock_nanosleep, err, 4, clock_id, flags, req,
71 rem);
72 #endif
73 LIBC_CANCEL_RESET (oldstate);
74 #endif
75 }
76
77 return (INTERNAL_SYSCALL_ERROR_P (r, err)
78 ? INTERNAL_SYSCALL_ERRNO (r, err) : 0);
79 }
80