using namespace std; int main() { /** * We want to check wether a semaphore can be initialised * with a value. */ =20=20=20 // a semaphore sem_t psem; // initialise it with value 10 assert(sem_init(&psem,0,10) =3D=3D 0); // ASSERT N= O 1 // if the semaphore initialisation was ok, the sem // should now have the value 10 int ret =3D 0; assert(sem_getvalue(&psem,&ret) =3D=3D 0); // ASSERT NO 2 // if no errors occured then value is now in the=20 // integer ret cout << endl << "sem_getvalue() returns value " << ret << endl << flush; =20 return 0; } I'm using MS VC++ 6.0, and I'm linking with the precompiled pthreadVCE.lib = library. At runtime, the first assert() passes OK, but second fails. I have no idea why this fails (hopefully it's simply a newby error, and not= a bug in=20 the pthreads-win32 lib), but it does. Thanks Rob ------=_NextPart_000_00C0_01C207F4.7E31C200 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-length: 2919

I'm new to using pthreads-win32 (SNAPSHOT 2002-03-02), and I have to port

a program from Linux to Windows 2000. A bug has somehow crept into my

code, and I've narrowed the problem area d= own to a=20 code fragment similar

to the following:

#include <semaphore.h>
#include=20 <cassert>
#include <iostream>

using namespace std;

int main()
{
  =20 /**
    * We want to check wether a semaphore can be=20 initialised
    * with a value.
   =20 */

   // a semaphore
   sem_t=20 psem;

   // initialise it with value=20 10
   assert(sem_init(&psem,0,10) =3D=3D=20 0);            =           =20 // ASSERT NO 1
   // if the semaphore initialisation was ok, t= he=20 sem
   // should now have the value 10
   int ret= =3D=20 0;
   assert(sem_getvalue(&psem,&ret) =3D=3D=20 0);            =   =20 // ASSERT NO 2
   // if no errors occured then value is now in= the=20
   // integer ret
   cout << endl <<= =20 "sem_getvalue() returns value " << ret << endl <<=20 flush;

   return 0;
}

I'm using MS VC++ 6.0, and = I'm=20 linking with the precompiled pthreadVCE.lib library.

At runtime, the first assert() passes OK, = but=20 second fails.

I have no idea why this fails (hopefully i= t's=20 simply a newby error, and not a bug in

the pthreads-win32 lib), but it does.

Thanks

Rob

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