October 2009 - libdispatch-dev - lists.macosforge.org

[PATCH] use libkqueue if sys/event.h is missing
by Mark Heily 18 Nov '09

18 Nov '09

Here is a patch that enables libdispatch to use libkqueue on platforms that do not support kqueue(2). I have made pretty good progress with libkqueue and the current sources are here: http://mark.heily.com/src/libkqueue/ diff -ru -x .svn ./configure.ac ../trunk.NEW/configure.ac --- ./configure.ac 2009-10-18 20:59:34.000000000 -0400 +++ ../trunk.NEW/configure.ac 2009-10-18 20:55:29.000000000 -0400 @@ -170,6 +170,17 @@ ) # +# Use either libkqueue or the native kqueue(2) system calls +# +AC_CHECK_HEADER([sys/event.h], + [use_libkqueue=false], + [AC_CHECK_HEADER([kqueue/sys/event.h], + use_libkqueue=true, + AC_MSG_ERROR("sys/event.h not found"))] +) +AM_CONDITIONAL(USE_LIBKQUEUE, $use_libkqueue) + +# # Find functions and declarations we care about. # AC_CHECK_DECLS([CLOCK_UPTIME, CLOCK_MONOTONIC], [], [], diff -ru -x .svn ./src/Makefile.am ../trunk.NEW/src/Makefile.am --- ./src/Makefile.am 2009-10-18 20:59:34.000000000 -0400 +++ ../trunk.NEW/src/Makefile.am 2009-10-18 21:03:54.000000000 -0400 @@ -16,6 +16,7 @@ time.c libdispatch_la_CFLAGS=-Wall +libdispatch_la_LIBADD= INCLUDES=-I$(top_builddir) -I$(top_srcdir) \ @APPLE_LIBC_SOURCE_PATH@ @APPLE_XNU_SOURCE_PATH@ @@ -27,7 +28,12 @@ endif if USE_LIBPTHREAD -libdispatch_la_LIBADD=-lpthread +libdispatch_la_LIBADD+= -lpthread +endif + +if USE_LIBKQUEUE +libdispatch_la_LIBADD+= -lkqueue +libdispatch_la_CFLAGS+= -I/usr/include/kqueue endif if USE_MIG

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autoconf HAVE macro conventions
by Kevin Van Vechten 02 Nov '09

02 Nov '09

I'm not very familiar with autoconf conventions and was wondering why some config.h values are merely defined and some are explicitly defined to 1. Is there a strong convention to do #ifdef HAVE_FOO instead of #if HAVE_FOO when testing for configure features? For various reasons, the ability to define a macro to 0 or 1 would be useful for the Mac OS X version of config.h — it would let us define certain features in terms of other features without as much conditional logic. Kevin

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[PATCH 00/17] portability + chainsaw
by Paolo Bonzini 02 Nov '09

02 Nov '09

Here is my attempt at improving libdispatch's portability. Of course it's still a kevent-only show, but it should be easier now to implement an epoll-based (or even SIGIO+SIGALRM+poll-based) replacement. At least it makes more clear where the boundaries are between the kevent code and the rest. Because of the very precise requirements of libdispatch on kevent's semantics, it may be easier to go this way rather than implement kevent as a wrapper. I have no answer, and libnqkqueue is very interesting, but anyway these patches are quite safe. Here are them: - add .gitignore files - move __private_extern__ detection to an autoconf macro - move atomic builtin detections to separate autoconf macro - move blocks detection to separate autoconf macro - more precise detection of blocks Just configury. - split os_shims.h into separate files - remove compat/fd_copy.h - finish moving stuff into src/shims Unifying a bit the terminology, see individual comments. - portability After which the non-kqueue parts compile on Linux. - consolidate hashing of dispatch_kevent_t - move mach2nano/nano2mach from source.c to shims/ Two small cleanups. - extract source-type-specific initialization to per-type functions More completely developed later in the series. - abstract some mentions of ds->ds_dkev Also preparing for later. - extract kevent-specific parts of queue.c - almost completely separate kevent/source.c Moving code to new files without any change. You can check this with a command like diff -b <(git diff HEAD^^^! src/source.c | sed -n s/^-//p) <(git diff HEAD^^^! src/source_kevent.c | sed -n s/^+//p) - complete separation - remove last mention of struct kevent from "generic" code These finish the cleanup. Note: this was tested on FreeBSD only. HTH, Paolo

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[PATCH] simplify autogen.sh
by Paolo Bonzini 27 Oct '09

27 Oct '09

This is all that is needed, actually. --- autogen.sh | 6 +----- 1 files changed, 1 insertions(+), 5 deletions(-) diff --git a/autogen.sh b/autogen.sh index d4668c6..b83e6e7 100644 --- a/autogen.sh +++ b/autogen.sh @@ -2,9 +2,5 @@ # # # -libtoolize --copy --force -aclocal -autoheader -automake -a -c --foreign -autoconf +autoreconf -fvi -- 1.6.2.5

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libkqueue website and SVN repository
by Mark Heily 24 Oct '09

24 Oct '09

I have created a simple website for libkqueue and imported the code into an SVN repository. The URI is: http://mark.heily.com/libkqueue/ To checkout the SVN repository, run the following command: svn checkout svn://mark.heily.com/libkqueue Regards, - Mark

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libkqueue
by Mark Heily 19 Oct '09

19 Oct '09

After looking at the differences between kqueue(2) and libevent, I decided it would be best to write a very thin wrapper library to emulate kqueue on non-BSD platforms. I've gotten pretty far with the effort to port kqueue to Linux, and wanted to let everyone know that this is a work-in-progress. The working title of this effort is "libkqueue". If you are curious, you can download the libkqueue source code from here: http://mark.heily.com/src/ Currently, I have implemented the EVFILT_READ, EVFILT_WRITE, and EVFILT_SIGNAL filter types. I plan to implement EVFILT_VNODE using inotify, and EVFILT_TIMER using timerfds. I might have to implement EVFILT_PROC using a helper thread. After the Linux port is complete, I'll consider other Unixes such as OpenSolaris. I'm not a Windows developer, so if anyone wants to help with a Windows port, that would be great. It is my hope that the quality and completeness of libkqueue will soon be sufficient enough to be used with libdispatch. Regards, - Mark

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portability patches
by Paolo Bonzini 17 Oct '09

17 Oct '09

Hi all, I managed to dissect libdispatch well enough that on Linux everything compiles except for two files including all the kqueue bits (which are extracted from queue.c and source.c). Here are the patches: Paolo Bonzini (13): split os_shims.h into separate files move __private_extern__ detection to an autoconf macro remove compat/fd_copy.h finish moving stuff into src/shims portability consolidate hashing of dispatch_kevent_t move mach2nano/nano2mach from source.c to shims/ extract source-type-specific initialization to per-type functions abstract some mentions of ds->ds_dkev extract kevent-specific parts of queue.c almost completely separate kevent/source.c complete separation All but the last three are relatively boring. Would these patches be interesting enough that I should dig up my PPC Mac? Do I have any hope to run libdispatch under Tiger? Paolo

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