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| author | Marc Mutz <marc.mutz@kdab.com> | 2017-02-14 01:26:25 +0100 |
|---|---|---|
| committer | Marc Mutz <marc.mutz@kdab.com> | 2017-02-15 20:14:27 +0000 |
| commit | 04d6495bf773a6bb0d4fa6980df22d3b81a605b0 (patch) | |
| tree | 3372ff44c12f502402f80704c058082d1d27257b /src/corelib/plugin/quuid.cpp | |
| parent | a5febadac55741b4b48f25463a310835cc8bde19 (diff) | |
Make some atomic counters zero-based
A variable of static storage duration that is not zero-initialized
takes up space in the DATA segment of the executable. By making the
counters start at zero and adding the initial value afterwards, we
move them over to the BSS segment, which does not take up space in
the executable.
Wrap atomics used across function boundaries into small functions,
to avoid code duplication and to increase readability.
Change-Id: Ida6ed316ecb8fe20da62a9577161349e14de5aed
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Diffstat (limited to 'src/corelib/plugin/quuid.cpp')
| -rw-r--r-- | src/corelib/plugin/quuid.cpp | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/corelib/plugin/quuid.cpp b/src/corelib/plugin/quuid.cpp index f11ac6548b..1a7073a069 100644 --- a/src/corelib/plugin/quuid.cpp +++ b/src/corelib/plugin/quuid.cpp @@ -968,10 +968,10 @@ QUuid QUuid::createUuid() if (!uuidseed.hasLocalData()) { int *pseed = new int; - static QBasicAtomicInt serial = Q_BASIC_ATOMIC_INITIALIZER(2); + static QBasicAtomicInt serial; qsrand(*pseed = QDateTime::currentSecsSinceEpoch() + quintptr(&pseed) - + serial.fetchAndAddRelaxed(1)); + + 2 + serial.fetchAndAddRelaxed(1)); uuidseed.setLocalData(pseed); } #else |