Problems running external Win32 Multithread C-Program from Java

Question

hi,
i just wrote a little java application which is calling my c-binary (a win32 multithread application written in pure ansi c) . let's call it "test.exe". i'm launching it via:
Runtime.getRuntime().exec(cmd, new String[] { env }, dir)the program is started correctly and i get all test.exe outputs on my java console (therefor i grabbed the inputstream and errorstream of the process-object ...). so far so good.
my problem is, that something with the multithreading seems to be wrong, when launching my test.exe from java!
for example, i have the following line of code in my c-program (test.exe):
WaitForSingleObject( g_hMutexREADY, INFINITE );if i launch my program as java process, this line seems to be ignored! that means, the program doesn't stop executing at this point (and is waiting for the mutex) but simply continues executing, causing the whole program to crash.
if i run the same program directly from the winxp commandline all is working fine (that means: the threads of 'test.exe' synchronize each other correctly via the mutexes)!
does anybody has an idea or have already had similar problems? maybe some win32 libraries are missing, could that be?
thanks a lot.
k4simir

Answer 1

I just debugged a little bit through my c program. and it's not the multithrading stuff causing the error, but the win32 socket creation!
my "multithreading c program" :-) is an ASR (automatic speech recognizer). it runs as socket server (on localhost) and accepts connections from clients (my java application). the client (java app) controls the ASR server (means start(), stop(), open(), close() ...). if the ASR server recognizes some user input, it will transfer it to the client for further processing.
so far the theory. if i launch the ASR server via the window command line, the communication and the other stuff works fine. now i want my java app to launch the ASR server.
the ASR fails, when it tries to create the socket:
g_Vars.kServSock = socket( AF_INET, SOCK_STREAM, 0 );the error code returned by WSAGetLastError() is 10106! i didn't find this error code in the msdn! so i don't know what it means or what might be the problem.
any ideas?
thanks a lot!
k4simir
here's the full code:
int     InitSocket( short sPortNr ) {
     int               iErr;
     SOCKADDR_IN     kMyAddr;
     iErr = StartUp();
     if( iErr != _SRC_OK ) {
          return _SRC_ERROR;
     // create server-socket:
     g_Vars.kServSock = socket( AF_INET, SOCK_STREAM, 0 );
     if( g_Vars.kServSock == INVALID_SOCKET ) {
          CleanUp();
          return _SRC_ERROR;
int StartUp() {
     WORD wVersionRequested;
     WSADATA wsaData;
     int err;
     _DEBUGPRINT
     wVersionRequested = MAKEWORD( 2, 2 );
     err = WSAStartup( wVersionRequested, &wsaData );
     if ( err != 0 ) {
          return _SRC_ERROR;
     if ( LOBYTE( wsaData.wVersion ) != 2 ||
           HIBYTE( wsaData.wVersion ) != 2 ) {
          WSACleanup( );
          return _SRC_ERROR;
     return _SRC_OK;
}