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Diffstat (limited to 'winsup/cygwin/DevNotes')
| -rw-r--r-- | winsup/cygwin/DevNotes | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/winsup/cygwin/DevNotes b/winsup/cygwin/DevNotes index 8e517bf84..cd8caf886 100644 --- a/winsup/cygwin/DevNotes +++ b/winsup/cygwin/DevNotes @@ -1,3 +1,24 @@ +2012-07-21 cgf-000013 + +These changes reflect a revamp of the "wait for signal" functionality +which has existed in Cygwin through several signal massages. + +We now create a signal event only when a thread is waiting for a signal +and arm it only for that thread. The "set_thread_waiting" function is +used to establish the event and set it in a location referencable by +the caller. + +I still do not handle all of the race conditions. What happens when +a signal comes in just after a WF?O succeeds for some other purpose? I +suspect that it will arm the next WF?O call and the subsequent call to +call_signal_handler could cause a function to get an EINTR when possibly +it shouldn't have. + +I haven't yet checked all of the test cases for the URL listed in the +previous entry. + +Baby steps. + 2012-06-12 cgf-000012 These changes are the preliminary for redoing the way threads wait for |