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QRecursiveMutex: make tryLock(QDeadlineTimer) the default (was: int) 

The default argument staying on the old int overload meant that on
Windows a nullary tryLock() call would need to go through both DLL-
exported functions (int, then QDeadlineTimer) and on non-Windows
platforms, it would hit the out-of-line QDeadlineTimer(qint64)
ctor.

By moving the default argument from the old to the new function, we
reduce the nullary call on Windows from two to one exported functions.
On non-Windows, we make it to hit QDeadlineTimer's constexpr inline
default ctor instead.

Found in API-review.

Amends ff9da1db0b.

Pick-to: 6.6
Change-Id: Id3e9923cf97ee1673fe05c85c30b5a12531857b3
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
bb10
Marc Mutz 2023-08-18 20:35:57 +02:00
parent 02add2a807
commit f780893c39
1 changed files with 2 additions and 2 deletions
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4
src/corelib/thread/qmutex.h
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@ -181,8 +181,8 @@ public:
void lock() QT_MUTEX_LOCK_NOEXCEPT
{ tryLock(QDeadlineTimer(QDeadlineTimer::Forever)); }
QT_CORE_INLINE_SINCE(6, 6)
bool tryLock(int timeout = 0) QT_MUTEX_LOCK_NOEXCEPT;
bool tryLock(QDeadlineTimer timer) QT_MUTEX_LOCK_NOEXCEPT;
bool tryLock(int timeout) QT_MUTEX_LOCK_NOEXCEPT;
bool tryLock(QDeadlineTimer timer = {}) QT_MUTEX_LOCK_NOEXCEPT;
// BasicLockable concept
void unlock() noexcept;