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//===-- Implementation of gettimeofday function ---------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "src/time/gettimeofday.h"
#include "hdr/time_macros.h"
#include "hdr/types/suseconds_t.h"
#include "src/__support/common.h"
#include "src/__support/libc_errno.h"
#include "src/__support/macros/config.h"
#include "src/__support/time/clock_gettime.h"
#include "src/__support/time/units.h"
namespace LIBC_NAMESPACE_DECL {
// TODO(michaelrj): Move this into time/linux with the other syscalls.
LLVM_LIBC_FUNCTION(int, gettimeofday,
(struct timeval * tv, [[maybe_unused]] void *unused)) {
using namespace time_units;
if (tv == nullptr)
return 0;
struct timespec ts;
auto result = internal::clock_gettime(CLOCK_REALTIME, &ts);
// A negative return value indicates an error with the magnitude of the
// value being the error code.
if (!result.has_value()) {
libc_errno = result.error();
return -1;
}
tv->tv_sec = ts.tv_sec;
tv->tv_usec = static_cast<suseconds_t>(ts.tv_nsec / 1_us_ns);
return 0;
}
} // namespace LIBC_NAMESPACE_DECL
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