diff options
| author | Thiago Macieira <thiago.macieira@intel.com> | 2012-08-12 12:54:11 +0200 |
|---|---|---|
| committer | Qt by Nokia <qt-info@nokia.com> | 2012-08-25 05:41:14 +0200 |
| commit | caa22ff8ad9ee85dadf1620a9be24c1d555c1973 (patch) | |
| tree | 3a569e86e367b222e4cc82697dd4a73d859c86d3 /src/corelib/tools/qelapsedtimer_unix.cpp | |
| parent | 88c7c35b21df302f3d3124ce26e79ec6429d3bde (diff) | |
Use nanosleep instead of pthread_cond_timedwait for thread sleeping
There's a comment saying nanosleep's availability is questionable, but
the information of what systems don't have that is now lost in
time. It's quite likely that they were older, Unix systems we no
longer support anyway.
nanosleep comes from POSIX.1b-1993, which is merged into POSIX.1-2001,
so chances are that it's supported almost everywhere where Qt runs
(except for Windows anyway).
Change-Id: I4fd18f8715c43a42429000f3b3d2c3b7343f94b4
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
Reviewed-by: João Abecasis <joao.abecasis@nokia.com>
Diffstat (limited to 'src/corelib/tools/qelapsedtimer_unix.cpp')
| -rw-r--r-- | src/corelib/tools/qelapsedtimer_unix.cpp | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/corelib/tools/qelapsedtimer_unix.cpp b/src/corelib/tools/qelapsedtimer_unix.cpp index d7419aea18..435a797a4d 100644 --- a/src/corelib/tools/qelapsedtimer_unix.cpp +++ b/src/corelib/tools/qelapsedtimer_unix.cpp @@ -144,6 +144,20 @@ timeval qt_gettime() Q_DECL_NOTHROW return tv; } +void qt_nanosleep(timespec amount) +{ + // We'd like to use clock_nanosleep. + // + // But clock_nanosleep is from POSIX.1-2001 and both are *not* + // affected by clock changes when using relative sleeps, even for + // CLOCK_REALTIME. + // + // nanosleep is POSIX.1-1993 + + int r; + EINTR_LOOP(r, nanosleep(&amount, &amount)); +} + static qint64 elapsedAndRestart(qint64 sec, qint64 frac, qint64 *nowsec, qint64 *nowfrac) { |