On Jun 22 17:07, Ken Brown wrote: > On 6/22/2015 9:25 AM, Corinna Vinschen wrote: > >On Jun 22 08:05, Ken Brown wrote: > >>According to the Cygwin API documentation > >>(https://cygwin.com/cygwin-api/std-notes.html), "getitimer and setitimer > >>only support ITIMER_REAL for now." I'm wondering whether there's any chance > >>that support for ITIMER_PROF might be added. I have no idea what the > >>obstacles are. > >> > >>My reason for asking is that emacs has a CPU profiling function, which > >>doesn't work on Cygwin because it relies on ITIMER_PROF. (There's an > >>alternative implementation, but it requires timer_getoverrun, also not > >>available in Cygwin.) > > > >Both very tricky. Given the description of timer_getoverrun and how > >this stuff is implemented in Cygwin, you might get away with > > > > #ifdef __CYGWIN__ > > #define timer_getoverrun(x) 0 > > #endif > > > >indepedently of using SIGEV_SIGNAL or SIGEV_THREAD. > > This seems to work. Thanks! > > One question: It seems that SIGEV_SIGNAL and friends are defined as macros > on Linux (or at least on the one Linux distribution I looked at), but on > Cygwin they're only enum constants. And emacs expects them to be defined as > macros. Would something like the following be reasonable for the sake of > compatibility? > > --- a/winsup/cygwin/include/cygwin/signal.h > +++ b/winsup/cygwin/include/cygwin/signal.h > @@ -311,6 +311,10 @@ enum > perform notification */ > }; > > +#define SIGEV_SIGNAL SIGEV_SIGNAL > +#define SIGEV_NONE SIGEV_NONE > +#define SIGEV_THREAD SIGEV_THREAD > + > #if __WORDSIZE == 64 > typedef __uint64_t sigset_t; > #else
Sure. I applied the patch. Thanks, Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Maintainer cygwin AT cygwin DOT com Red Hat
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