Hi, sorry for being so late. I welcome a proper native thread implementation for windows gcc. I have one point to address: I like the fact that i can easily build static executables with mingw-w64. In a few statements it was suggested that this will not be possible for mcfgthread but i didn’t come across an explanation why. Could you elaborate on that?
On Mon, Jun 20, 2016 at 3:55 PM lh mouse <[email protected]> wrote: > > Is this set in stone, or is it foreseen to change it to a more liberal > licence? > The choice of that license was an ... accident. XD XD XD > Since the library is expected to be linked dynamically it shouldn't matter > much. If you consider it problematic, please let me know. > > > Another question is: is it still possible to use pthreads (via > winpthreads) > > if gcc is configured with --enable-threads=mcf? > I don't think pthread_*() functions would break, but they will not work > with threads created with thrd_create() or std::thread() which would not be > created via pthread_create(), apparently. > Certain construction of GCC and GCC libraries, for example, `__thread`, > the C11 `_Thread_local`, the C++11 `thread_local` and the C++ exception > handler, requires a gthread library to work (this is usually done with a > header that redirects __gthread calls to other libraries such as winpthread > or the gthr-win32 one in libgcc). > > > and finally: is it really necessary to rely on "undocumented NT system > > calls for efficiency reasons"? > All efforts have been made to make **little cost** mutexes and condition > variables - they consume no system resources except the bytes where they > reside in. > It isn't necessary, only if we drop WIndows 7 support, because Microsoft > has plagiarized the Linux futex APIs somehow: > https://msdn.microsoft.com/en-us/library/windows/desktop/hh706898(v=vs.85).aspx > (Note that these APIs are available only since Windows 8.) > Windows 7 has the awesome SRW locks and condition variables, which, as > usual, are over-specific for Microsoft people's own usage. Their SRW locks > do not support timed waits and their condition variables do not support any > mutexes other than SRW locks and critical sections. > The keyed event APIs (http://locklessinc.com/articles/keyed_events/) are > undocumented but turn out to be much powerful. If Microsoft people haven't > implemented timed mutexes or generic condition variables, then it is we > that should implement them. > > ------------------ > Best regards, > lh_mouse > 2016-06-20 > > ------------------------------------------------------------- > 发件人：Carl Kleffner <[email protected]> > 发送日期：2016-06-20 19:29 > 收件人：mingw-w64-public > 抄送： > 主题：Re: [Mingw-w64-public] Proposal for a C11 header and announcement > of mcfgthread, > a library that implements efficient C11 and C++11 thread support without > using winpthread > > Hi, > > most of the mcfgthread code is LGPL licenced (MCFLicense.txt > <https://github.com/lhmouse/mcfgthread/blob/master/MCFLicense.txt>). Is > this set in stone, or is it foreseen to change it to a more liberal > licence? > > Another question is: is it still possible to use pthreads (via winpthreads) > if gcc is configured with --enable-threads=mcf? > > and finally: is it really necessary to rely on "undocumented NT system > calls for efficiency reasons"? > > Just a few points that come into my mind after a quick scan of your > repository. The idea to overcome the schism of mingw-w64 thread > configurations is really great. > > Regards > > Carl > > > 2016-06-18 21:10 GMT+02:00 lh mouse <[email protected]>: > > > Hello everyone, > > > > It is with great honor that I bring you the C11-conforming header for > > thread support of mcfgthread, c11thread.h: > > https://github.com/lhmouse/mcfgthread/blob/master/src/env/c11thread.h > > All headers in the mcfgthread project have been put into the public > domain. > > > > As JonY suggested a few days ago, it would be nice for mingw-w64 to have > > C11 thread support. > > This announcement is not only a call for testers, but also a proposal for > > a C11 header for mingw-w64. We can have both C11 and C++11 threads from > > today. > > > > The following code illustrates how to use C11 threads: > > ``` > > E:\Desktop>expand -t4 test.c > > #include <mcfgthread/c11thread.h> > > #include <stdio.h> > > #include <stdlib.h> > > > > int thread_proc(void *param){ > > printf("thread running: tid = %u, param = %p\n", > > (unsigned)thrd_current(), param); > > for(int i = 0; i < 5; ++i){ > > printf("thread going to sleep for one second...\n"); > > struct timespec ts; > > ts.tv_sec = 1; > > ts.tv_nsec = 0; > > thrd_sleep(&ts, 0); > > } > > int exit_code = 67890; > > printf("thread exiting: exit_code = %d\n", exit_code); > > return exit_code; > > } > > > > int main(){ > > thrd_t tid; > > int err; > > if((err = thrd_create(&tid, &thread_proc, (void *)0x12345)) != > > thrd_success){ > > printf("thrd_create() returned %d\n", err); > > abort(); > > } > > printf("created thread: tid = %u\n", (unsigned)tid); > > int exit_code; > > if((err = thrd_join(tid, &exit_code)) != thrd_success){ > > printf("thrd_join() returned %d\n", err); > > abort(); > > } > > printf("joined thread: exit_code = %d\n", exit_code); > > } > > > > E:\Desktop>gcc test.c -std=c11 -Wall -Wextra -pedantic -lmcfgthread > > > > E:\Desktop>a.exe > > created thread: tid = 9876 > > thread running: tid = 9876, param = 00012345 > > thread going to sleep for one second... > > thread going to sleep for one second... > > thread going to sleep for one second... > > thread going to sleep for one second... > > thread going to sleep for one second... > > thread exiting: exit_code = 67890 > > joined thread: exit_code = 67890 > > > > E:\Desktop> > > ``` > > > > In order to use C++11 std::thread (as well as std::mutex, > > std::condition_variable, etc) you must rebuild GCC and its libraries. > > A few instructions can be found here: > > https://github.com/lhmouse/mcfgthread/wiki > > > > > > -------------- > > Best regards, > > lh_mouse > > 2016-06-19 > > > > > > > > > ------------------------------------------------------------------------------ > > What NetFlow Analyzer can do for you? Monitors network bandwidth and > > traffic > > patterns at an interface-level. Reveals which users, apps, and protocols > > are > > consuming the most bandwidth. Provides multi-vendor support for NetFlow, > > J-Flow, sFlow and other flows. Make informed decisions using capacity > > planning > > reports. http://sdm.link/zohomanageengine > > _______________________________________________ > > Mingw-w64-public mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/mingw-w64-public > > > > ------------------------------------------------------------------------------ > What NetFlow Analyzer can do for you? Monitors network bandwidth and > traffic > patterns at an interface-level. Reveals which users, apps, and protocols > are > consuming the most bandwidth. Provides multi-vendor support for NetFlow, > J-Flow, sFlow and other flows. Make informed decisions using capacity > planning > reports. http://sdm.link/zohomanageengine > _______________________________________________ > Mingw-w64-public mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/mingw-w64-public > > > > > ------------------------------------------------------------------------------ > What NetFlow Analyzer can do for you? Monitors network bandwidth and > traffic > patterns at an interface-level. Reveals which users, apps, and protocols > are > consuming the most bandwidth. Provides multi-vendor support for NetFlow, > J-Flow, sFlow and other flows. Make informed decisions using capacity > planning > reports. http://sdm.link/zohomanageengine > _______________________________________________ > Mingw-w64-public mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/mingw-w64-public > ------------------------------------------------------------------------------ Attend Shape: An AT&T Tech Expo July 15-16. Meet us at AT&T Park in San Francisco, CA to explore cutting-edge tech and listen to tech luminaries present their vision of the future. This family event has something for everyone, including kids. Get more information and register today. http://sdm.link/attshape _______________________________________________ Mingw-w64-public mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/mingw-w64-public
