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On 07.11.2013 22:00, Edscott Wilson wrote:
Ok. So I now I ran more tests. To start with, I replaced the
unnamed process-shared semaphore for a more compatible named
semaphore, which by definition is process-shared. The code works
fine in Linux and
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On 07.11.2013 22:34, LRN wrote:
On 07.11.2013 22:00, Edscott Wilson wrote:
Ok. So I now I ran more tests. To start with, I replaced the
unnamed process-shared semaphore for a more compatible named
semaphore, which by definition is
No need to be sorry. Great stuff, this MinGW-w64.
As soon as I cook up some wrapper code and test it in libtubo, I'll post it
for your review.
2013/11/7 LRN lrn1...@gmail.com
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On 07.11.2013 22:34, LRN wrote:
On 07.11.2013 22:00, Edscott
Ruben Van Boxem писал 2013-11-05 23:57:
You can get MinGW-w64 from here:
http://sourceforge.net/projects/mingwbuilds/files/mingw-builds-install/mingw-builds-install.exe
Or seperate downloads via here:
http://mingw-w64.sourceforge.net/download.php#mingw-builds
Previously I reported about
2013/11/4 LRN lrn1...@gmail.com
What CreateSemaphore() uses internally is anyone's guess. It might be
CreateFileMapping(), it might be not. If it goes into kernel side,
then it may as well use something more efficient there.
libwinpthreads uses CreateSemaphore() internally, so if you'd use
2013/11/5 Edscott Wilson edscott.wilson.gar...@gmail.com
2013/11/4 LRN lrn1...@gmail.com
What CreateSemaphore() uses internally is anyone's guess. It might be
CreateFileMapping(), it might be not. If it goes into kernel side,
then it may as well use something more efficient there.
2013/11/5 Ruben Van Boxem vanboxem.ru...@gmail.com
If you have pthreadGC2.dll, you are not using winpthreads, but
pthreads-win32, an older and completely different project. What toolchain
are you using? I don't think you're using MinGW-w64, but the older and less
complete MinGW(.org).
You
Well I did my testing of semaphores to release a windows version of libtubo
(http://xffm.org/libtubo.html) and these are my two cents.
1- Shared semaphores (shared between heavy weight processes). In Linux, a
shared semaphore must be placed in shared memory. This is easy, since the
shm_ family of
Hi Edscott,
thanks for testing this. I just have one small question about one paragraph.
2013/11/4 Edscott Wilson edscott.wilson.gar...@gmail.com:
2- Local semaphores (shared only between threads). Posix semaphores in Mingw
seem to be subject to race conditions not present in Linux or
As I understand it, all it takes to get a POSIX semaphore in windows is to
include semaphore.h and link with -lpthread. Windows semaphores are
defined in windows.h. Since POSIX semaphores are in libpthread, they
would be pthread semaphores. Nonetheless, I think they have a different
flavor. The
Ah, right. I missed that we provide here semaphore-API, too. I
wouldn't call that API posix ... but yes, this is a bare-layer to be
used carefully ... we implement in winpthread nearly all more complex
stuff based on the sem-API.
2013/11/4 Edscott Wilson edscott.wilson.gar...@gmail.com:
As I
2013/11/4 Kai Tietz ktiet...@googlemail.com
Pthread_ stuff applies only to threads, created with pthread_create.
While
semaphores may apply to independent processes. As far as I recall,
semaphores require interaction with the kernel, while pthread stuff is
contained within the running
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On 04.11.2013 20:19, Edscott Wilson wrote:
Well I did my testing of semaphores to release a windows version
of libtubo (http://xffm.org/libtubo.html) and these are my two
cents.
1- Shared semaphores (shared between heavy weight processes). In
In Linux, you can get a piece of shared memory, put a posix semaphore in
there, and use it amongst independent processes. This is done by setting
the second parameter of sem_init() to 1. In FreeBSD this functionality is
not supported (at least the last time I looked).
Does anybody on the list
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On 21.10.2013 20:32, Edscott Wilson wrote:
In Linux, you can get a piece of shared memory, put a posix semaphore in
there, and use it amongst independent processes. This is done by setting
the second parameter of sem_init() to 1. In FreeBSD this
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