use pthread under winCE

use pthread under winCE

[Benoit Raque]

Hi,

I try to compile the pthreads-win32 library for winCE, but I can only 
get a dll and a lib on the x86 format (using VC++6 to compile).
When I make a project in embedded Visual C (3 or 4), I get an error 
"can't found process.h".

Is there a way to compile it in the ARM, MIPS or other format ?


Thank you for your help
Benoit Raque

Re: use pthread under winCE

[James Ewing]

Did you define WINCE in the project?

I compile pthreads for ARM using Micrsoft's Embedded Visual C++ 3.0 
regularly and haven't had any problems. I have the following defines in 
the config.h file:

#ifdef WINCE
#define NEED_DUPLICATEHANDLE
#define NEED_CREATETHREAD
#define NEED_ERRNO
#define NEED_CALLOC
#define NEED_FTIME
#define NEED_SEM
#define NEED_UNICODE_CONSTS
#endif


And the following in every file that includes <process.h>:

#if !defined(_UWIN) && !defined(WINCE)
#include <process.h>
#endif

Best Regards,

James Ewing

Benoit Raque wrote:

> Hi,
>
> I try to compile the pthreads-win32 library for winCE, but I can only 
> get a dll and a lib on the x86 format (using VC++6 to compile).
> When I make a project in embedded Visual C (3 or 4), I get an error 
> "can't found process.h".
>
> Is there a way to compile it in the ARM, MIPS or other format ?
>
>
> Thank you for your help
> Benoit Raque
>

Re: use pthread under winCE

[Benoit Raque]

I have now declare WINCE, HAVE_CONFIG_H, and add some macros for 
<process.h> and <sys/timeb.h> too.

The project now compile, with a warning :
ptw32_getprocessors.c(67) : warning C4013: 'GetProcessAffinityMask' 
undefined; assuming extern returning int

But when it links I get these errors :
pthread.obj : error LNK2001: unresolved external symbol _errno
pthread.obj : error LNK2019: unresolved external symbol 
_GetProcessAffinityMask referenced in function _ptw32_getprocessors

The _errno function is in the project and compile, I don't understand 
why the linker don't find it.
The _GetProcessAffinityMask looks like a standard function for thread, 
but I don't find it in the eVC include.


Benoit Raque

James Ewing wrote:

> Did you define WINCE in the project?
>
> I compile pthreads for ARM using Micrsoft's Embedded Visual C++ 3.0 
> regularly and haven't had any problems. I have the following defines 
> in the config.h file:
>
> #ifdef WINCE
> #define NEED_DUPLICATEHANDLE
> #define NEED_CREATETHREAD
> #define NEED_ERRNO
> #define NEED_CALLOC
> #define NEED_FTIME
> #define NEED_SEM
> #define NEED_UNICODE_CONSTS
> #endif
>
>
> And the following in every file that includes <process.h>:
>
> #if !defined(_UWIN) && !defined(WINCE)
> #include <process.h>
> #endif
>
> Best Regards,
>
> James Ewing
>
> Benoit Raque wrote:
>
>> Hi,
>>
>> I try to compile the pthreads-win32 library for winCE, but I can only 
>> get a dll and a lib on the x86 format (using VC++6 to compile).
>> When I make a project in embedded Visual C (3 or 4), I get an error 
>> "can't found process.h".
>>
>> Is there a way to compile it in the ARM, MIPS or other format ?
>>
>>
>> Thank you for your help
>> Benoit Raque
>>
>
>
>
> .
>

Re: use pthread under winCE

[James Ewing]

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 -----------------------------------------------------------

Re: use pthread under winCE

[Benoit Raque]

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 
> -----------------------------------------------------------
>
>
>

Re: use pthread under winCE

[James Ewing]

Hi Benoit,

Try inserting the following:

#if defined(_ARM_)
#define PTW32_PROGCTR(Context)  ((Context).Psr)
#endif

Best Regards,

James

Benoit Raque wrote:

> 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 
>> -----------------------------------------------------------
>>
>>
>>
>
>