Subj : CRT _beginthread returns -1, errno=ENOMEM "Not enough space" on 3GB dualcpu
To   : comp.programming.threads,comp.os.ms-windows.programmer.nt.kernel-mode,microsoft.public.vc.language
From : lpdcunha
Date : Wed Mar 30 2005 09:50 pm

I need some help debugging a program that is hanging because of a
thread problem with _beginthread() multithreaded C-runtime call. I'm
using VS6 debugger to step into the code.

System: Xeon 3.2GHz, dual cpu, 3.2GB RAM

Problem: 
Two threads are being created. First one created ok. Second one fails.
_beginthread() returns (-1L). I have this:

 thr = _beginthread( (void (*)(void *) )f, stk_size, (void *)arg );

Error code I get is: 
  1) errno = 12, ENOMEM "Not enough space"
  2) GetLastError() returns 8, ERROR_NOT_ENOUGH_MEMORY  
     "Not enough storage is available to process this command."

 stk_size passed in 32768 for both threads.


I found one post out there with the exact same problem I have.
http://groups.google.ca/groups?hl=en&lr=&th=4770efc299759096&seekm=1998Jun10.061451.8665%40cmkrnl&frame=off

It mentions that the problem could be: Running out of virtual address
space. I'm not familiar with this area, but I dont know why this is a
problem on a 3GB dual cpu machine. Something wrong with the 3GB
addressability?

Any help appreciated.

Thanks,
Larry

p.s.  Aside: I had some CRT-debug problems. I linked msvcrtd.dll
debug-multithreaded CRT into the app. But I could not successfully
step into the code for _beginthread() in thread.c CRT-source file. The
symbols were not found (even though I have msvcrtd.pdb in the path)
These files are all in my VC98 subdirectories. Oh well.

.