1 //===-- Linux implementation of nanosleep function ------------------------===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
9 #include "src/time/nanosleep.h"
10 #include "hdr/time_macros.h"
11 #include "src/__support/OSUtil/syscall.h" // For syscall functions.
12 #include "src/__support/common.h"
13 #include "src/__support/macros/config.h"
14 #include "src/errno/libc_errno.h"
16 #include <stdint.h> // For int64_t.
17 #include <sys/syscall.h> // For syscall numbers.
19 namespace LIBC_NAMESPACE_DECL
{
21 LLVM_LIBC_FUNCTION(int, nanosleep
,
22 (const struct timespec
*req
, struct timespec
*rem
)) {
24 int ret
= LIBC_NAMESPACE::syscall_impl
<int>(SYS_nanosleep
, req
, rem
);
25 #elif defined(SYS_clock_nanosleep_time64)
27 sizeof(time_t) == sizeof(int64_t),
28 "SYS_clock_gettime64 requires struct timespec with 64-bit members.");
29 int ret
= LIBC_NAMESPACE::syscall_impl
<int>(SYS_clock_nanosleep_time64
,
30 CLOCK_REALTIME
, 0, req
, rem
);
32 #error "SYS_nanosleep and SYS_clock_nanosleep_time64 syscalls not available."
42 } // namespace LIBC_NAMESPACE_DECL