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duration.cpp
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367 lines (313 loc) · 9.82 KB
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// Copyright 2017 Open Source Robotics Foundation, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <cmath>
#include <cstdlib>
#include <limits>
#include <utility>
#include "rclcpp/clock.hpp"
#include "rclcpp/time.hpp"
#include "builtin_interfaces/msg/duration.hpp"
#include "rcl/time.h"
#include "rclcpp/exceptions.hpp"
#include "rcutils/logging_macros.h"
#include "rclcpp/utilities.hpp"
namespace rclcpp
{
Duration::Duration(int32_t seconds, uint32_t nanoseconds)
{
rcl_duration_.nanoseconds = RCL_S_TO_NS(static_cast<int64_t>(seconds));
rcl_duration_.nanoseconds += nanoseconds;
}
Duration::Duration(std::chrono::nanoseconds nanoseconds)
{
rcl_duration_.nanoseconds = nanoseconds.count();
}
Duration::Duration(const Duration & rhs) = default;
Duration::Duration(
const builtin_interfaces::msg::Duration & duration_msg)
{
rcl_duration_.nanoseconds =
RCL_S_TO_NS(static_cast<rcl_duration_value_t>(duration_msg.sec));
rcl_duration_.nanoseconds += static_cast<rcl_duration_value_t>(duration_msg.nanosec);
}
Duration::Duration(const rcl_duration_t & duration)
: rcl_duration_(duration)
{
// noop
}
Duration::operator builtin_interfaces::msg::Duration() const
{
builtin_interfaces::msg::Duration msg_duration;
constexpr rcl_duration_value_t kDivisor = RCL_S_TO_NS(1);
constexpr int32_t max_s = std::numeric_limits<int32_t>::max();
constexpr int32_t min_s = std::numeric_limits<int32_t>::min();
constexpr uint32_t max_ns = std::numeric_limits<uint32_t>::max();
const auto result = std::div(rcl_duration_.nanoseconds, kDivisor);
if (result.rem >= 0) {
// saturate if we will overflow
if (result.quot > max_s) {
msg_duration.sec = max_s;
msg_duration.nanosec = max_ns;
} else {
msg_duration.sec = static_cast<int32_t>(result.quot);
msg_duration.nanosec = static_cast<uint32_t>(result.rem);
}
} else {
if (result.quot <= min_s) {
msg_duration.sec = min_s;
msg_duration.nanosec = 0u;
} else {
msg_duration.sec = static_cast<int32_t>(result.quot - 1);
msg_duration.nanosec = static_cast<uint32_t>(kDivisor + result.rem);
}
}
return msg_duration;
}
Duration &
Duration::operator=(const Duration & rhs) = default;
Duration &
Duration::operator=(const builtin_interfaces::msg::Duration & duration_msg)
{
*this = Duration(duration_msg);
return *this;
}
bool
Duration::operator==(const rclcpp::Duration & rhs) const
{
return rcl_duration_.nanoseconds == rhs.rcl_duration_.nanoseconds;
}
bool
Duration::operator!=(const rclcpp::Duration & rhs) const
{
return rcl_duration_.nanoseconds != rhs.rcl_duration_.nanoseconds;
}
bool
Duration::operator<(const rclcpp::Duration & rhs) const
{
return rcl_duration_.nanoseconds < rhs.rcl_duration_.nanoseconds;
}
bool
Duration::operator<=(const rclcpp::Duration & rhs) const
{
return rcl_duration_.nanoseconds <= rhs.rcl_duration_.nanoseconds;
}
bool
Duration::operator>=(const rclcpp::Duration & rhs) const
{
return rcl_duration_.nanoseconds >= rhs.rcl_duration_.nanoseconds;
}
bool
Duration::operator>(const rclcpp::Duration & rhs) const
{
return rcl_duration_.nanoseconds > rhs.rcl_duration_.nanoseconds;
}
void
bounds_check_duration_sum(int64_t lhsns, int64_t rhsns, uint64_t max)
{
auto abs_lhs = static_cast<uint64_t>(std::abs(lhsns));
auto abs_rhs = static_cast<uint64_t>(std::abs(rhsns));
if (lhsns > 0 && rhsns > 0) {
if (abs_lhs + abs_rhs > max) {
throw std::overflow_error("addition leads to int64_t overflow");
}
} else if (lhsns < 0 && rhsns < 0) {
if (abs_lhs + abs_rhs > max) {
throw std::underflow_error("addition leads to int64_t underflow");
}
}
}
Duration
Duration::operator+(const rclcpp::Duration & rhs) const
{
bounds_check_duration_sum(
this->rcl_duration_.nanoseconds,
rhs.rcl_duration_.nanoseconds,
std::numeric_limits<rcl_duration_value_t>::max());
return Duration::from_nanoseconds(
rcl_duration_.nanoseconds + rhs.rcl_duration_.nanoseconds);
}
Duration &
Duration::operator+=(const rclcpp::Duration & rhs)
{
*this = *this + rhs;
return *this;
}
void
bounds_check_duration_difference(int64_t lhsns, int64_t rhsns, uint64_t max)
{
auto abs_lhs = static_cast<uint64_t>(std::abs(lhsns));
auto abs_rhs = static_cast<uint64_t>(std::abs(rhsns));
if (lhsns > 0 && rhsns < 0) {
if (abs_lhs + abs_rhs > max) {
throw std::overflow_error("duration subtraction leads to int64_t overflow");
}
} else if (lhsns < 0 && rhsns > 0) {
if (abs_lhs + abs_rhs > max) {
throw std::underflow_error("duration subtraction leads to int64_t underflow");
}
}
}
Duration
Duration::operator-(const rclcpp::Duration & rhs) const
{
bounds_check_duration_difference(
this->rcl_duration_.nanoseconds,
rhs.rcl_duration_.nanoseconds,
std::numeric_limits<rcl_duration_value_t>::max());
return Duration::from_nanoseconds(
rcl_duration_.nanoseconds - rhs.rcl_duration_.nanoseconds);
}
Duration &
Duration::operator-=(const rclcpp::Duration & rhs)
{
*this = *this - rhs;
return *this;
}
void
bounds_check_duration_scale(int64_t dns, double scale, uint64_t max)
{
auto abs_dns = static_cast<uint64_t>(std::abs(dns));
auto abs_scale = std::abs(scale);
if (abs_scale > 1.0 && abs_dns >
static_cast<uint64_t>(static_cast<long double>(max) / static_cast<long double>(abs_scale)))
{
if ((dns > 0 && scale > 0) || (dns < 0 && scale < 0)) {
throw std::overflow_error("duration scaling leads to int64_t overflow");
} else {
throw std::underflow_error("duration scaling leads to int64_t underflow");
}
}
}
Duration
Duration::operator*(double scale) const
{
if (!std::isfinite(scale)) {
throw std::runtime_error("abnormal scale in rclcpp::Duration");
}
bounds_check_duration_scale(
this->rcl_duration_.nanoseconds,
scale,
std::numeric_limits<rcl_duration_value_t>::max());
long double scale_ld = static_cast<long double>(scale);
return Duration::from_nanoseconds(
static_cast<rcl_duration_value_t>(
static_cast<long double>(rcl_duration_.nanoseconds) * scale_ld));
}
Duration &
Duration::operator*=(double scale)
{
*this = *this * scale;
return *this;
}
rcl_duration_value_t
Duration::nanoseconds() const
{
return rcl_duration_.nanoseconds;
}
Duration
Duration::max()
{
return Duration(std::numeric_limits<int32_t>::max(), 999999999);
}
double
Duration::seconds() const
{
return std::chrono::duration<double>(std::chrono::nanoseconds(rcl_duration_.nanoseconds)).count();
}
rmw_time_t
Duration::to_rmw_time() const
{
if (rcl_duration_.nanoseconds < 0) {
throw std::runtime_error("rmw_time_t cannot be negative");
}
// Purposefully avoid creating from builtin_interfaces::msg::Duration
// to avoid possible overflow converting from int64_t to int32_t, then back to uint64_t
rmw_time_t result;
constexpr rcl_duration_value_t kDivisor = RCL_S_TO_NS(1);
const auto div_result = std::div(rcl_duration_.nanoseconds, kDivisor);
result.sec = static_cast<uint64_t>(div_result.quot);
result.nsec = static_cast<uint64_t>(div_result.rem);
return result;
}
Duration
Duration::from_rmw_time(rmw_time_t duration)
{
Duration ret;
constexpr rcl_duration_value_t limit_ns = std::numeric_limits<rcl_duration_value_t>::max();
constexpr rcl_duration_value_t limit_sec = RCL_NS_TO_S(limit_ns);
if (duration.sec > limit_sec || duration.nsec > limit_ns) {
// saturate if will overflow
ret.rcl_duration_.nanoseconds = limit_ns;
return ret;
}
uint64_t total_ns = RCL_S_TO_NS(duration.sec) + duration.nsec;
if (total_ns > limit_ns) {
// saturate if will overflow
ret.rcl_duration_.nanoseconds = limit_ns;
return ret;
}
ret.rcl_duration_.nanoseconds = static_cast<rcl_duration_value_t>(total_ns);
return ret;
}
Duration
Duration::from_seconds(double seconds)
{
Duration ret;
ret.rcl_duration_.nanoseconds = static_cast<int64_t>(RCL_S_TO_NS(seconds));
return ret;
}
Duration
Duration::from_nanoseconds(rcl_duration_value_t nanoseconds)
{
Duration ret;
ret.rcl_duration_.nanoseconds = nanoseconds;
return ret;
}
builtin_interfaces::msg::Time
operator+(const builtin_interfaces::msg::Time & lhs, const rclcpp::Duration & rhs)
{
if (lhs.sec < 0) {
throw std::runtime_error("message time is negative");
}
rcl_time_point_value_t rcl_time;
rcl_time = RCL_S_TO_NS(static_cast<int64_t>(lhs.sec));
rcl_time += lhs.nanosec;
if (rclcpp::add_will_overflow(rcl_time, rhs.nanoseconds())) {
throw std::overflow_error("addition leads to int64_t overflow");
}
if (rclcpp::add_will_underflow(rcl_time, rhs.nanoseconds())) {
throw std::underflow_error("addition leads to int64_t underflow");
}
rcl_time += rhs.nanoseconds();
return convert_rcl_time_to_sec_nanos(rcl_time);
}
builtin_interfaces::msg::Time
operator-(const builtin_interfaces::msg::Time & lhs, const rclcpp::Duration & rhs)
{
if (lhs.sec < 0) {
throw std::runtime_error("message time is negative");
}
rcl_time_point_value_t rcl_time;
rcl_time = RCL_S_TO_NS(static_cast<int64_t>(lhs.sec));
rcl_time += lhs.nanosec;
if (rclcpp::sub_will_overflow(rcl_time, rhs.nanoseconds())) {
throw std::overflow_error("addition leads to int64_t overflow");
}
if (rclcpp::sub_will_underflow(rcl_time, rhs.nanoseconds())) {
throw std::underflow_error("addition leads to int64_t underflow");
}
rcl_time -= rhs.nanoseconds();
return convert_rcl_time_to_sec_nanos(rcl_time);
}
} // namespace rclcpp