🚀 go-pugleaf

Hi,

"Tumurbaatar S." <nospam_tumur@magicnet.mn> wrote:
>There's a integer variable visible to 2 threads. One of the threads
>reads/modifies this var, but other thread only reads it.
>But an exact value of the var is not important for the 2nd thread.
>The thread checks it for zero or not, i.e. "if (my_var)...".
>Is it not matter that I'm not using any synchronization methods? 

If both threads from a single process you can use 
critical section objects for accessing to your variable.
But in this case all access to variable must be in single 
critical section.

EnterCriticalSection
switch(threadNum)
   {
     case 1: {.... read variable.... } break;
     case 2: {.... read/modify variable ...} break;
   }
LeaveCriticalSection 

For details see help.

More common way - using semaphore object. The threads query 
access (for example, WaitForSingleObject) before access variable (or another sharing resource).

More information - in Win32 Programmer's Reference Help 
in Part "Interprocess Synchronization".

Vladimir.