forked from mirrors/gecko-dev
c5f254d17c
clang is warning that C++20 expects comparison operators to be commutative: `a == b` and `b == a` should resolve to the same comparison operator function. Warnings about the comparison of const and non-const objects can be fixed by making the comparison operator function const. xpcom/base/AvailableMemoryWatcherMac.cpp:404:14 [-Wambiguous-reversed-operator] ISO C++20 considers use of overloaded operator '==' (with operand types 'mozilla::MacMemoryPressureLevel' and 'mozilla::MacMemoryPressureLevel') to be ambiguous despite there being a unique best viable function xpcom/base/AvailableMemoryWatcherMac.cpp:568:24 [-Wambiguous-reversed-operator] ISO C++20 considers use of overloaded operator '==' (with operand types 'mozilla::MacMemoryPressureLevel' and 'mozilla::MacMemoryPressureLevel') to be ambiguous despite there being a unique best viable function Depends on D179024 Differential Revision: https://phabricator.services.mozilla.com/D179025
77 lines
2.2 KiB
C++
77 lines
2.2 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#ifndef mozilla_MemoryPressureLevelMac_h
|
|
#define mozilla_MemoryPressureLevelMac_h
|
|
|
|
namespace mozilla {
|
|
|
|
#if defined(XP_DARWIN)
|
|
// An internal representation of the Mac memory-pressure level constants.
|
|
class MacMemoryPressureLevel {
|
|
public:
|
|
// Order enum values so that higher integer values represent higher
|
|
// memory pressure levels allowing comparison operators to be used.
|
|
enum class Value {
|
|
eUnset,
|
|
eUnexpected,
|
|
eNormal,
|
|
eWarning,
|
|
eCritical,
|
|
};
|
|
|
|
MacMemoryPressureLevel() : mValue(Value::eUnset) {}
|
|
MOZ_IMPLICIT MacMemoryPressureLevel(Value aValue) : mValue(aValue) {}
|
|
|
|
bool operator==(const Value& aRhsValue) const { return mValue == aRhsValue; }
|
|
bool operator==(const MacMemoryPressureLevel& aRhs) const {
|
|
return mValue == aRhs.mValue;
|
|
}
|
|
|
|
// Implement '<' and derive the other comparators from it.
|
|
bool operator<(const MacMemoryPressureLevel& aRhs) const {
|
|
return mValue < aRhs.mValue;
|
|
}
|
|
bool operator>(const MacMemoryPressureLevel& aRhs) const {
|
|
return aRhs < *this;
|
|
}
|
|
bool operator<=(const MacMemoryPressureLevel& aRhs) const {
|
|
return !(aRhs < *this);
|
|
}
|
|
bool operator>=(const MacMemoryPressureLevel& aRhs) const {
|
|
return !(*this < aRhs);
|
|
}
|
|
|
|
Value GetValue() { return mValue; }
|
|
bool IsNormal() { return mValue == Value::eNormal; }
|
|
bool IsUnsetOrNormal() { return IsNormal() || (mValue == Value::eUnset); }
|
|
bool IsWarningOrAbove() {
|
|
return (mValue == Value::eWarning) || (mValue == Value::eCritical);
|
|
}
|
|
|
|
const char* ToString() {
|
|
switch (mValue) {
|
|
case Value::eUnset:
|
|
return "Unset";
|
|
case Value::eUnexpected:
|
|
return "Unexpected";
|
|
case Value::eNormal:
|
|
return "Normal";
|
|
case Value::eWarning:
|
|
return "Warning";
|
|
case Value::eCritical:
|
|
return "Critical";
|
|
}
|
|
}
|
|
|
|
private:
|
|
Value mValue;
|
|
};
|
|
#endif
|
|
|
|
} // namespace mozilla
|
|
|
|
#endif // mozilla_MemoryPressureLevelMac_h
|