PATCH: Improve performance of gthr-win32

[Wu Yongwei]

Christopher Faylor wrote:
> On Mon, Mar 15, 2004 at 10:46:02PM +0800, Wu Yongwei wrote:
> 
>>This is my attempt to solve the performance overhead of __gthread_mutex
>>functions.  On Win32, in order to support __gthread_mutex_trylock,
>>currently MUTEXs instead of CRITICAL_SECTIONs are used to represent the
>>__gthread_mutex_t, but MUTEXs are far slower.  According to my own
>>measurement, the overhead is about 60:1.
>>
>>When my first attempt to address this problem by implementing
>>TryEnterCriticalSection on Windows 9x failed, Thomas Pfaff showed
>>another way:
>>
>>http://article.gmane.org/gmane.comp.gnu.mingw.devel/803
>>
>>And I have finally done this.  Please have a check.  There are the
>>patch, two test files, and my test log.  The only drawback is that it
>>requires Windows 98 or later, and Windows NT 4 or later.  I do not think
>>it a problem, but I am willing to write another patch to solve the
>>problem using inline assembly if people here insist that Windows 95 is
>>important.
> 
> 
> When you presented these patches to the mingw-dvlpr mailing list there
> was some question about copyright.  We need your assurance that you both
> have an assignment on file with the FSF for changes to gcc and that you
> have not adapted these patches from some other project like
> pthreads-win32 or cygwin.
> 
> cgf

Please enlighten me how.  I am willing to do everything needed to make 
the patch accepted, but I am really a newbie in respect of contributing 
to GCC.  Must I snail-mail a written disclaimer, or what?  And where is 
the most appropriate template (I only found some in mail archives but 
not on the page indicated by the Contributing page)?

I have not copied or consulted code in other projects, whether 
open-source or commercial.  The only external source is Thomas's ideas.

Best regards,

Wu Yongwei