--- /dev/null
+/*
+ * Copyright 2004-present Facebook, 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 <folly/chrono/Conv.h>
+
+#include <folly/portability/GTest.h>
+
+using namespace folly;
+using namespace std::chrono;
+using namespace std::chrono_literals;
+
+namespace {
+/**
+ * A helper function to create a time_point even if the input duration type has
+ * finer resolution than the clock duration type.
+ */
+template <typename Clock, typename Duration>
+typename Clock::time_point createTimePoint(const Duration& d) {
+ return typename Clock::time_point(
+ std::chrono::duration_cast<typename Clock::duration>(d));
+}
+} // namespace
+
+TEST(Conv, timespecToStdChrono) {
+ struct timespec ts;
+
+ ts.tv_sec = 0;
+ ts.tv_nsec = 10;
+ EXPECT_EQ(10ns, to<nanoseconds>(ts));
+ EXPECT_EQ(0us, to<microseconds>(ts));
+ EXPECT_EQ(0ms, to<milliseconds>(ts));
+ EXPECT_EQ(0s, to<seconds>(ts));
+
+ ts.tv_sec = 1;
+ ts.tv_nsec = 10;
+ EXPECT_EQ(1000000010ns, to<nanoseconds>(ts));
+ EXPECT_EQ(1000000us, to<microseconds>(ts));
+ EXPECT_EQ(1000ms, to<milliseconds>(ts));
+ EXPECT_EQ(1s, to<seconds>(ts));
+ EXPECT_EQ(
+ createTimePoint<system_clock>(1000000010ns),
+ to<system_clock::time_point>(ts));
+ EXPECT_EQ(
+ createTimePoint<steady_clock>(1000000010ns),
+ to<steady_clock::time_point>(ts));
+
+ // Test a non-canonical value with tv_nsec larger than 1 second
+ ts.tv_sec = 5;
+ ts.tv_nsec = 3219876543;
+ // Beware about using std::chrono_literals suffixes with very literals:
+ // older versions of GCC are buggy and would truncate these to 32-bits.
+ EXPECT_EQ(8219876543LL, to<nanoseconds>(ts).count());
+ EXPECT_EQ(8219876us, to<microseconds>(ts));
+ EXPECT_EQ(8219ms, to<milliseconds>(ts));
+ EXPECT_EQ(8s, to<seconds>(ts));
+ EXPECT_EQ(
+ createTimePoint<system_clock>(nanoseconds(8219876543LL)),
+ to<system_clock::time_point>(ts));
+ EXPECT_EQ(
+ createTimePoint<steady_clock>(nanoseconds(8219876543LL)),
+ to<steady_clock::time_point>(ts));
+
+ // Test negative values
+ // When going to coarser grained types these should be rounded up towards 0.
+ ts.tv_sec = -5;
+ ts.tv_nsec = 123456;
+ EXPECT_EQ(-4999876544, to<nanoseconds>(ts).count());
+ EXPECT_EQ(-4999876544, duration_cast<nanoseconds>(-5s + 123456ns).count());
+ EXPECT_EQ(-4999876, to<microseconds>(ts).count());
+ EXPECT_EQ(-4999876, duration_cast<microseconds>(-5s + 123456ns).count());
+ EXPECT_EQ(-4999, to<milliseconds>(ts).count());
+ EXPECT_EQ(-4999, duration_cast<milliseconds>(-5s + 123456ns).count());
+ EXPECT_EQ(-4s, to<seconds>(ts));
+ EXPECT_EQ(-4, duration_cast<seconds>(-5s + 123456ns).count());
+ ts.tv_sec = -7200;
+ ts.tv_nsec = 123456;
+ EXPECT_EQ(-1h, to<hours>(ts));
+ EXPECT_EQ(
+ -1,
+ duration_cast<hours>(seconds{ts.tv_sec} + nanoseconds{ts.tv_nsec})
+ .count());
+ ts.tv_sec = -7000;
+ ts.tv_nsec = 123456;
+ EXPECT_EQ(-1h, to<hours>(ts));
+ EXPECT_EQ(
+ -1,
+ duration_cast<hours>(seconds{ts.tv_sec} + nanoseconds{ts.tv_nsec})
+ .count());
+ ts.tv_sec = -7201;
+ ts.tv_nsec = 123456;
+ EXPECT_EQ(-2h, to<hours>(ts));
+ EXPECT_EQ(
+ -2,
+ duration_cast<hours>(seconds{ts.tv_sec} + nanoseconds{ts.tv_nsec})
+ .count());
+
+ // Test converions to floating point durations
+ ts.tv_sec = 1;
+ ts.tv_nsec = 500000000;
+ EXPECT_EQ(1.5, to<duration<double>>(ts).count());
+ ts.tv_sec = -1;
+ ts.tv_nsec = 500000000;
+ EXPECT_EQ(-0.5, to<duration<double>>(ts).count());
+ ts.tv_sec = -1;
+ ts.tv_nsec = -500000000;
+ EXPECT_EQ(-1.5, to<duration<double>>(ts).count());
+ ts.tv_sec = 1;
+ ts.tv_nsec = 500000000;
+ auto doubleNanos = to<duration<double, std::nano>>(ts);
+ EXPECT_EQ(1500000000, doubleNanos.count());
+ ts.tv_sec = 90;
+ ts.tv_nsec = 0;
+ auto doubleMinutes = to<duration<double, std::ratio<60>>>(ts);
+ EXPECT_EQ(1.5, doubleMinutes.count());
+}
+
+TEST(Conv, timespecToStdChronoOverflow) {
+ struct timespec ts;
+
+ // All of our boundary conditions below assume time_t is int64_t.
+ // This is true on most modern platforms.
+ if (!std::is_same<decltype(ts.tv_sec), int64_t>::value) {
+ LOG(INFO) << "skipping most overflow tests: time_t is not int64_t";
+ } else {
+ // Test the upper boundary of conversion to uint64_t nanoseconds
+ using nsec_u64 = std::chrono::duration<uint64_t, std::nano>;
+ ts.tv_sec = 18446744073;
+ ts.tv_nsec = 709551615;
+ EXPECT_EQ(std::numeric_limits<uint64_t>::max(), to<nsec_u64>(ts).count());
+
+ ts.tv_nsec += 1;
+ EXPECT_THROW(to<nsec_u64>(ts), std::range_error);
+
+ // Test the lower boundary of conversion to uint64_t nanoseconds
+ ts.tv_sec = 0;
+ ts.tv_nsec = 0;
+ EXPECT_EQ(0, to<nsec_u64>(ts).count());
+ ts.tv_sec = -1;
+ ts.tv_nsec = 0;
+ EXPECT_THROW(to<nsec_u64>(ts), std::range_error);
+
+ // Test the upper boundary of conversion to int64_t microseconds
+ using usec_i64 = std::chrono::duration<int64_t, std::micro>;
+ ts.tv_sec = 9223372036854LL;
+ ts.tv_nsec = 775807000;
+ EXPECT_EQ(std::numeric_limits<int64_t>::max(), to<usec_i64>(ts).count());
+
+ ts.tv_nsec += 1;
+ EXPECT_THROW(to<usec_i64>(ts), std::range_error);
+
+ // Test the lower boundary of conversion to int64_t microseconds
+ ts.tv_sec = -9223372036855LL;
+ ts.tv_nsec = 224192000;
+ EXPECT_EQ(std::numeric_limits<int64_t>::min(), to<usec_i64>(ts).count());
+
+ ts.tv_nsec -= 1;
+ EXPECT_THROW(to<usec_i64>(ts), std::range_error);
+
+ // Test the boundaries of conversion to int32_t seconds
+ using sec_i32 = std::chrono::duration<int32_t>;
+ ts.tv_sec = 2147483647;
+ ts.tv_nsec = 0;
+ EXPECT_EQ(std::numeric_limits<int32_t>::max(), to<sec_i32>(ts).count());
+ ts.tv_nsec = 1000000000;
+ EXPECT_THROW(to<sec_i32>(ts), std::range_error);
+ ts.tv_sec = -2147483648;
+ ts.tv_nsec = 0;
+ EXPECT_EQ(std::numeric_limits<int32_t>::min(), to<sec_i32>(ts).count());
+ ts.tv_sec = -2147483649;
+ ts.tv_nsec = 999999999;
+ EXPECT_THROW(to<sec_i32>(ts), std::range_error);
+ ts.tv_sec = -2147483649;
+ ts.tv_nsec = 0;
+ EXPECT_THROW(to<sec_i32>(ts), std::range_error);
+ ts.tv_sec = -2147483650;
+ ts.tv_nsec = 0;
+ EXPECT_THROW(to<sec_i32>(ts), std::range_error);
+
+ // Test the upper boundary of conversion to uint32_t hours
+ using hours_u32 = std::chrono::duration<uint32_t, std::ratio<3600>>;
+ ts.tv_sec = 15461882262000LL;
+ ts.tv_nsec = 0;
+ EXPECT_EQ(std::numeric_limits<uint32_t>::max(), to<hours_u32>(ts).count());
+ ts.tv_sec = 15461882265599LL;
+ EXPECT_EQ(std::numeric_limits<uint32_t>::max(), to<hours_u32>(ts).count());
+ ts.tv_sec = 15461882265600LL;
+ EXPECT_THROW(to<hours_u32>(ts), std::range_error);
+
+ using nsec_i64 = std::chrono::duration<int64_t, std::nano>;
+ ts.tv_sec = std::numeric_limits<int64_t>::max();
+ ts.tv_nsec = std::numeric_limits<int64_t>::max();
+ EXPECT_THROW(to<nsec_i64>(ts), std::range_error);
+
+ ts.tv_sec = std::numeric_limits<int64_t>::min();
+ ts.tv_nsec = std::numeric_limits<int64_t>::min();
+ EXPECT_THROW(to<nsec_i64>(ts), std::range_error);
+
+ // Test some non-normal inputs near the int64_t limit
+ ts.tv_sec = 0;
+ ts.tv_nsec = std::numeric_limits<int64_t>::min();
+ EXPECT_EQ(std::numeric_limits<int64_t>::min(), to<nsec_i64>(ts).count());
+ ts.tv_sec = -1;
+ ts.tv_nsec = std::numeric_limits<int64_t>::min() + std::nano::den;
+ EXPECT_EQ(std::numeric_limits<int64_t>::min(), to<nsec_i64>(ts).count());
+ ts.tv_sec = -1;
+ ts.tv_nsec = std::numeric_limits<int64_t>::min() + std::nano::den - 1;
+ EXPECT_THROW(to<nsec_i64>(ts), std::range_error);
+
+ ts.tv_sec = 0;
+ ts.tv_nsec = std::numeric_limits<int64_t>::max();
+ EXPECT_EQ(std::numeric_limits<int64_t>::max(), to<nsec_i64>(ts).count());
+ ts.tv_sec = 1;
+ ts.tv_nsec = std::numeric_limits<int64_t>::max() - std::nano::den;
+ EXPECT_EQ(std::numeric_limits<int64_t>::max(), to<nsec_i64>(ts).count());
+ ts.tv_sec = 1;
+ ts.tv_nsec = std::numeric_limits<int64_t>::max() - std::nano::den + 1;
+ EXPECT_THROW(to<nsec_i64>(ts), std::range_error);
+ }
+
+ // Theoretically conversion is representable in the output type,
+ // but we normalize the input first, and normalization would trigger an
+ // overflow.
+ using hours_u64 = std::chrono::duration<uint64_t, std::ratio<3600>>;
+ ts.tv_sec = std::numeric_limits<decltype(ts.tv_sec)>::max();
+ ts.tv_nsec = 1000000000;
+ EXPECT_THROW(to<hours_u64>(ts), std::range_error);
+ // If we drop it back down to the normal range it should succeed
+ ts.tv_nsec = 999999999;
+ EXPECT_EQ(
+ std::numeric_limits<decltype(ts.tv_sec)>::max() / 3600,
+ to<hours_u64>(ts).count());
+}
+
+TEST(Conv, timevalToStdChrono) {
+ struct timeval tv;
+
+ tv.tv_sec = 0;
+ tv.tv_usec = 10;
+ EXPECT_EQ(10000ns, to<nanoseconds>(tv));
+ EXPECT_EQ(10us, to<microseconds>(tv));
+ EXPECT_EQ(0ms, to<milliseconds>(tv));
+ EXPECT_EQ(0s, to<seconds>(tv));
+
+ tv.tv_sec = 1;
+ tv.tv_usec = 10;
+ EXPECT_EQ(1000010000ns, to<nanoseconds>(tv));
+ EXPECT_EQ(1000010us, to<microseconds>(tv));
+ EXPECT_EQ(1000ms, to<milliseconds>(tv));
+ EXPECT_EQ(1s, to<seconds>(tv));
+ EXPECT_EQ(
+ createTimePoint<system_clock>(1000010000ns),
+ to<system_clock::time_point>(tv));
+ EXPECT_EQ(
+ createTimePoint<steady_clock>(1000010000ns),
+ to<steady_clock::time_point>(tv));
+
+ // Test a non-canonical value with tv_usec larger than 1 second
+ tv.tv_sec = 5;
+ tv.tv_usec = 3219876;
+ EXPECT_EQ(8219876000LL, to<nanoseconds>(tv).count());
+ EXPECT_EQ(8219876us, to<microseconds>(tv));
+ EXPECT_EQ(8219ms, to<milliseconds>(tv));
+ EXPECT_EQ(8s, to<seconds>(tv));
+ EXPECT_EQ(
+ createTimePoint<system_clock>(nanoseconds(8219876000LL)),
+ to<system_clock::time_point>(tv));
+ EXPECT_EQ(
+ createTimePoint<steady_clock>(nanoseconds(8219876000LL)),
+ to<steady_clock::time_point>(tv));
+
+ // Test for overflow.
+ if (std::numeric_limits<decltype(tv.tv_sec)>::max() >=
+ std::numeric_limits<int64_t>::max()) {
+ // Use our own type alias here rather than std::chrono::nanoseconds
+ // to ensure we have 64-bit rep type.
+ using nsec_i64 = std::chrono::duration<int64_t, std::nano>;
+ tv.tv_sec = std::numeric_limits<decltype(tv.tv_sec)>::max();
+ tv.tv_usec = std::numeric_limits<decltype(tv.tv_usec)>::max();
+ EXPECT_THROW(to<nsec_i64>(tv), std::range_error);
+
+ tv.tv_sec = std::numeric_limits<decltype(tv.tv_sec)>::min();
+ tv.tv_usec = std::numeric_limits<decltype(tv.tv_usec)>::max();
+ EXPECT_THROW(to<nsec_i64>(tv), std::range_error);
+ }
+}
+
+TEST(Conv, stdChronoToTimespec) {
+ auto ts = to<struct timespec>(10ns);
+ EXPECT_EQ(0, ts.tv_sec);
+ EXPECT_EQ(10, ts.tv_nsec);
+
+ // We don't use std::chrono_literals suffixes here since older
+ // gcc versions silently truncate the literals to 32-bits.
+ ts = to<struct timespec>(nanoseconds(987654321012LL));
+ EXPECT_EQ(987, ts.tv_sec);
+ EXPECT_EQ(654321012, ts.tv_nsec);
+
+ ts = to<struct timespec>(nanoseconds(-987654321012LL));
+ EXPECT_EQ(-988, ts.tv_sec);
+ EXPECT_EQ(345678988, ts.tv_nsec);
+
+ ts = to<struct timespec>(microseconds(987654321012LL));
+ EXPECT_EQ(987654, ts.tv_sec);
+ EXPECT_EQ(321012000, ts.tv_nsec);
+
+ ts = to<struct timespec>(milliseconds(987654321012LL));
+ EXPECT_EQ(987654321, ts.tv_sec);
+ EXPECT_EQ(12000000, ts.tv_nsec);
+
+ ts = to<struct timespec>(seconds(987654321012LL));
+ EXPECT_EQ(987654321012, ts.tv_sec);
+ EXPECT_EQ(0, ts.tv_nsec);
+
+ ts = to<struct timespec>(10h);
+ EXPECT_EQ(36000, ts.tv_sec);
+ EXPECT_EQ(0, ts.tv_nsec);
+
+ ts = to<struct timespec>(createTimePoint<steady_clock>(123ns));
+ EXPECT_EQ(0, ts.tv_sec);
+ EXPECT_EQ(123, ts.tv_nsec);
+
+ ts = to<struct timespec>(createTimePoint<system_clock>(123ns));
+ EXPECT_EQ(0, ts.tv_sec);
+ EXPECT_EQ(123, ts.tv_nsec);
+}
+
+TEST(Conv, stdChronoToTimespecOverflow) {
+ EXPECT_THROW(to<uint8_t>(1234), std::range_error);
+
+ struct timespec ts;
+ if (!std::is_same<decltype(ts.tv_sec), int64_t>::value) {
+ LOG(INFO) << "skipping most overflow tests: time_t is not int64_t";
+ } else {
+ // Check for overflow converting from uint64_t seconds to time_t
+ using sec_u64 = duration<uint64_t>;
+ ts = to<struct timespec>(sec_u64(9223372036854775807ULL));
+ EXPECT_EQ(ts.tv_sec, 9223372036854775807ULL);
+ EXPECT_EQ(ts.tv_nsec, 0);
+
+ EXPECT_THROW(
+ to<struct timespec>(sec_u64(9223372036854775808ULL)), std::range_error);
+
+ // Check for overflow converting from int64_t hours to time_t
+ using hours_i64 = duration<int64_t, std::ratio<3600>>;
+ ts = to<struct timespec>(hours_i64(2562047788015215LL));
+ EXPECT_EQ(ts.tv_sec, 9223372036854774000LL);
+ EXPECT_EQ(ts.tv_nsec, 0);
+ EXPECT_THROW(
+ to<struct timespec>(hours_i64(2562047788015216LL)), std::range_error);
+ }
+
+ // Test for overflow.
+ // Use a custom hours type using time_t as the underlying storage type to
+ // guarantee that we can overflow.
+ using hours_timet = std::chrono::duration<time_t, std::ratio<3600>>;
+ EXPECT_THROW(
+ to<struct timespec>(hours_timet(std::numeric_limits<time_t>::max())),
+ std::range_error);
+}
+
+TEST(Conv, stdChronoToTimeval) {
+ auto tv = to<struct timeval>(10ns);
+ EXPECT_EQ(0, tv.tv_sec);
+ EXPECT_EQ(0, tv.tv_usec);
+
+ tv = to<struct timeval>(10us);
+ EXPECT_EQ(0, tv.tv_sec);
+ EXPECT_EQ(10, tv.tv_usec);
+
+ tv = to<struct timeval>(nanoseconds(987654321012LL));
+ EXPECT_EQ(987, tv.tv_sec);
+ EXPECT_EQ(654321, tv.tv_usec);
+
+ tv = to<struct timeval>(nanoseconds(-987654321012LL));
+ EXPECT_EQ(-988, tv.tv_sec);
+ EXPECT_EQ(345679, tv.tv_usec);
+
+ tv = to<struct timeval>(microseconds(987654321012LL));
+ EXPECT_EQ(987654, tv.tv_sec);
+ EXPECT_EQ(321012, tv.tv_usec);
+
+ tv = to<struct timeval>(milliseconds(987654321012LL));
+ EXPECT_EQ(987654321, tv.tv_sec);
+ EXPECT_EQ(12000, tv.tv_usec);
+
+ tv = to<struct timeval>(seconds(987654321012LL));
+ EXPECT_EQ(987654321012, tv.tv_sec);
+ EXPECT_EQ(0, tv.tv_usec);
+
+ // Try converting fractional seconds
+ tv = to<struct timeval>(duration<double>{3.456789});
+ EXPECT_EQ(3, tv.tv_sec);
+ EXPECT_EQ(456789, tv.tv_usec);
+ tv = to<struct timeval>(duration<double>{-3.456789});
+ EXPECT_EQ(-4, tv.tv_sec);
+ EXPECT_EQ(543211, tv.tv_usec);
+
+ // Try converting fractional hours
+ tv = to<struct timeval>(duration<double, std::ratio<3600>>{3.456789});
+ EXPECT_EQ(12444, tv.tv_sec);
+ // The usec field is generally off-by-one due to
+ // floating point rounding error
+ EXPECT_NEAR(440400, tv.tv_usec, 1);
+ tv = to<struct timeval>(duration<double, std::ratio<3600>>{-3.456789});
+ EXPECT_EQ(-12445, tv.tv_sec);
+ EXPECT_NEAR(559600, tv.tv_usec, 1);
+
+ // Try converting fractional milliseconds
+ tv = to<struct timeval>(duration<double, std::milli>{9123.456789});
+ EXPECT_EQ(9, tv.tv_sec);
+ EXPECT_EQ(123456, tv.tv_usec);
+ tv = to<struct timeval>(duration<double, std::milli>{-9123.456789});
+ EXPECT_EQ(-10, tv.tv_sec);
+ EXPECT_NEAR(876544, tv.tv_usec, 1);
+
+ tv = to<struct timeval>(duration<uint32_t, std::ratio<3600>>{3});
+ EXPECT_EQ(10800, tv.tv_sec);
+ EXPECT_EQ(0, tv.tv_usec);
+
+ tv = to<struct timeval>(duration<uint32_t, std::nano>{3123});
+ EXPECT_EQ(0, tv.tv_sec);
+ EXPECT_EQ(3, tv.tv_usec);
+ tv = to<struct timeval>(duration<int32_t, std::nano>{-3123});
+ EXPECT_EQ(-1, tv.tv_sec);
+ EXPECT_EQ(999997, tv.tv_usec);
+
+ tv = to<struct timeval>(createTimePoint<steady_clock>(123us));
+ EXPECT_EQ(0, tv.tv_sec);
+ EXPECT_EQ(123, tv.tv_usec);
+
+ tv = to<struct timeval>(createTimePoint<system_clock>(123us));
+ EXPECT_EQ(0, tv.tv_sec);
+ EXPECT_EQ(123, tv.tv_usec);
+}
projects / folly.git / blobdiff