Re: use pthread under winCE

[Benoit Raque <raque@lucent.com>]

Hi James,

Thanks a lot for your help.
I'm now able to compile the project for the emulator PocketPC2003 under 
eVC4.

But when I try to compile for ARMv4, I get this error : 
"pthread_cancel.c(59) : fatal error C1189: #error :  Module contains 
CPU-specific code; modify and recompile."
Looking at the code just before, I want to add something like that :
#if defined(_ARM_)
#define PTW32_PROGCTR(Context)  ((Context)."something here")
#endif 
but Iar, Fir or Eip don't work.
And I really don't know what I can put there.

Thank you again.

Benoit

James Ewing wrote:

> Hi Benoit,
>
> I've attached my modifications to the ptw32_getprocessors.c file that 
> fixes the GetProcessAffinityMask for WINCE. It just forces the 
> processor count to one.
>
> I looked in the pthread.h file and found that if you don't have _UWIN 
> defined, pthreads own internal _errno will be used. Make sure _UWIN is 
> *not* defined. See line 1143 in pthread.h.
>
> It was many moons ago that I tweaked pthreads for WIN32 for WINCE and 
> I've forgotten much of what needed to be done. If anyone wants a diff 
> of my build against the current CVS version just let me know and I'll 
> send it out. It might be a good idea to test it a bit and then merge 
> it into the main CVS tree. I use the same source for both WIN32 and 
> WINCE pthreads builds.
>
> Best,
>
> James
>
>
> [ ptw32_getprocessors.c]
> ----------------------------------------------------------------------
> /*
> * ptw32_getprocessors()
> *
> * Get the number of CPUs available to the process.
> *
> * If the available number of CPUs is 1 then pthread_spin_lock()
> * will block rather than spin if the lock is already owned.
> *
> * pthread_spin_init() calls this routine when initialising
> * a spinlock. If the number of available processors changes
> * (after a call to SetProcessAffinityMask()) then only
> * newly initialised spinlocks will notice.
> */
> int
> ptw32_getprocessors(int * count)
> {
>  int result = 0;
>
> #ifndef WINCE
>  DWORD vProcessCPUs;
>  DWORD vSystemCPUs;
>
>  if (GetProcessAffinityMask(GetCurrentProcess(),
>                 &vProcessCPUs,
>                 &vSystemCPUs))
>    {
>      DWORD bit;
>      int CPUs = 0;
>
>      for (bit = 1; bit != 0; bit <<= 1)
>    {
>      if (vProcessCPUs & bit)
>        {
>          CPUs++;
>        }
>    }
>      *count = CPUs;
>    }
>  else
>    {
>      result = EAGAIN;
>    }
> #else
>  *count = 1;
> #endif
>  return(result);
> // end of file 
> -----------------------------------------------------------
>
>
>