diff options
| author | Corinna Vinschen <corinna@vinschen.de> | 2011-07-07 10:21:24 +0400 |
|---|---|---|
| committer | Corinna Vinschen <corinna@vinschen.de> | 2011-07-07 10:21:24 +0400 |
| commit | 66965620fc9cf7102d4e3daf7e7e18f658e16e08 (patch) | |
| tree | 6da41770a42a9205c95623441a0145b7d62c7185 /winsup/cygwin | |
| parent | 57e64035f8426c86dd211c5246bbde426deb6a09 (diff) | |
* miscfuncs.cc (yield): Drop thread priority only once.
Diffstat (limited to 'winsup/cygwin')
| -rw-r--r-- | winsup/cygwin/ChangeLog | 4 | ||||
| -rw-r--r-- | winsup/cygwin/miscfuncs.cc | 6 |
2 files changed, 7 insertions, 3 deletions
diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog index 397436469..da03f8b25 100644 --- a/winsup/cygwin/ChangeLog +++ b/winsup/cygwin/ChangeLog @@ -1,3 +1,7 @@ +2011-07-07 Corinna Vinschen <corinna@vinschen.de> + + * miscfuncs.cc (yield): Drop thread priority only once. + 2011-07-06 Christopher Faylor <me.cygwin2011@cgf.cx> * exceptions.cc (_cygtls::interrupt_now): Back out previous change diff --git a/winsup/cygwin/miscfuncs.cc b/winsup/cygwin/miscfuncs.cc index d293edea9..14d67789f 100644 --- a/winsup/cygwin/miscfuncs.cc +++ b/winsup/cygwin/miscfuncs.cc @@ -239,17 +239,17 @@ check_iovec (const struct iovec *iov, int iovcnt, bool forwrite) void yield () { + int prio = GetThreadPriority (GetCurrentThread ()); + SetThreadPriority (GetCurrentThread (), THREAD_PRIORITY_IDLE); for (int i = 0; i < 2; i++) { - int prio = GetThreadPriority (GetCurrentThread ()); - SetThreadPriority (GetCurrentThread (), THREAD_PRIORITY_IDLE); /* MSDN implies that SleepEx(0,...) will force scheduling of other threads. Unlike SwitchToThread() the documentation does not mention other cpus so, presumably (hah!), this + using a lower priority will stall this thread temporarily and cause another to run. */ SleepEx (0, false); - SetThreadPriority (GetCurrentThread (), prio); } + SetThreadPriority (GetCurrentThread (), prio); } /* Get a default value for the nice factor. When changing these values, |