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Add unary operator- to units

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This will be used in the frame buffer 3 scheduler.

Bug: webrtc:13343
Change-Id: Ib699072021da30022a34aabe24e36a37e89ddf41
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/245642
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Evan Shrubsole <eshr@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35658}
This commit is contained in:
Evan Shrubsole
2022-01-11 13:50:00 +01:00
committed by WebRTC LUCI CQ
parent 3fd9cbc7a0
commit 21e97f9b9d
3 changed files with 20 additions and 0 deletions
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1
BUILD.gn
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@ -562,6 +562,7 @@ if (rtc_include_tests && !build_with_chromium) {
"rtc_base/task_utils:pending_task_safety_flag_unittests",
"rtc_base/task_utils:repeating_task_unittests",
"rtc_base/task_utils:to_queued_task_unittests",
"rtc_base/units:units_unittests",
"sdk:sdk_tests",
"test:rtp_test_utils",
"test:test_main",

8
rtc_base/units/unit_base.h
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@ -298,6 +298,14 @@ template <class Unit_T>
inline constexpr Unit_T operator*(int32_t scalar, RelativeUnit<Unit_T> other) {
return other * scalar;
}
template <class Unit_T>
inline constexpr Unit_T operator-(RelativeUnit<Unit_T> other) {
if (other.IsPlusInfinity())
return UnitBase<Unit_T>::MinusInfinity();
if (other.IsMinusInfinity())
return UnitBase<Unit_T>::PlusInfinity();
return -1 * other;
}
} // namespace rtc_units_impl

11
rtc_base/units/unit_base_unittest.cc
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@ -231,5 +231,16 @@ TEST(UnitBaseTest, InfinityOperations) {
EXPECT_TRUE((finite + TestUnit::MinusInfinity()).IsMinusInfinity());
EXPECT_TRUE((finite - TestUnit::PlusInfinity()).IsMinusInfinity());
}
TEST(UnitBaseTest, UnaryMinus) {
const int64_t kValue = 1337;
const TestUnit unit = TestUnit::FromValue(kValue);
EXPECT_EQ(-unit.ToValue(), -kValue);
// Check infinity.
EXPECT_EQ(-TestUnit::PlusInfinity(), TestUnit::MinusInfinity());
EXPECT_EQ(-TestUnit::MinusInfinity(), TestUnit::PlusInfinity());
}
} // namespace test
} // namespace webrtc