CODEWITHSUNDEEP
c++windowsmultithreadingevents
S_Rollan
S_Rollan

Reputation: 160

Code skipping the instruction of waiting for multiple events

I'm coding a program in C++ in Visual Studio 19 that waits for 640 events to happen (in its case, it's just a array of 640 HANDLE where every position needs to move right or left, that is not important).

Well, everyone of those has been initialised as 

for(i=0; i<640; i++)
    vector[i]=CreateEvent(NULL, true, false, NULL);

The issue with this is that the most important thread is the one who waits to all the events to happen, and I do:

WaitForMultipleObjects(640, vector, TRUE, INFINITE);

And I have the capital problem that my code just skips that line for some reason. Is there anyone who may tell me what's happening or give me an alternative solution?

Upvotes: 0

Views: 62

Answers (1)

1201ProgramAlarm
1201ProgramAlarm

Reputation: 32727

According to the docs for WaitForMultipleObjects, the maximum number of handles that can be waited on is given by MAXIMUM_WAIT_OBJECTS. A search of the Windows header files shows that it is defined as

#define MAXIMUM_WAIT_OBJECTS 64     // Maximum number of wait objects

in WinNT.h. So you're waiting on too many objects.

Since you want to wait for all of them, you could try breaking your request down into small, manageable sized chunks.

Upvotes: 3

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