Solved

timeSetEvent Error..

Posted on 2003-11-10
3
1,081 Views
Last Modified: 2007-12-19

Platform : Win2K Pro/SP4,  VC7/WinMM

Hi All,
       I need some hi-resolution timers. (ranging 10ms to 25 ms). I know Windows may not be be able to maintain that resolution, but I can manage that. But the real problem is sometimes I get an error when calling timeSetEvent() function (Time ID NULL). I went thru MSDN real quick and I could not find any method to see the reason why it failed.

This is what I do.
        I have several streaming data channels (UDP).
        Every channel has a timer object for data dispatch.
        These channels could stop start timers at any time (normally they just keep running).
        I call timeSetEvent() on every channel object at beginning. (timer resolution 23 ms for testing)
        It works fine for ~20 channels.
        The rest fails on tiemSetEvent()

        I checked timeCaps. (min resolution 1ms)

Any idea whats wrong ?? Is there a limitation for timesetEvent() ???

~ J
0
Comment
Question by:mxjijo
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
3 Comments
 
LVL 86

Accepted Solution

by:
jkr earned 125 total points
ID: 9716449
Yes, there is a limitation - see http://support.microsoft.com/default.aspx?scid=kb;EN-US;140104 ("HOWTO: Availability of Multimedia Timers"):

The number of multimedia timers your application can create at one time can vary based on the operating system it is running on and whether the application is 16-bit or 32-bit.

The following table gives an indication of what you can expect:

Operating System      16-bit app   32-bit app
--------------------------------------------------------------
Windows 3.11               8           0 (Not supported on Win32s)
Windows 95                32          32
Windows 98                32          32
Windows NT 3.51           16          16 per process
Windows NT 4.0            16          16 per process
Windows 2000              16          16 per process

0
 
LVL 8

Author Comment

by:mxjijo
ID: 9716473

What the.. !!!

thank u jkr :)
0
 

Expert Comment

by:twinstarjoe
ID: 14470625
What is this limit in Windows XP ?
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction This article is a continuation of the C/C++ Visual Studio Express debugger series. Part 1 provided a quick start guide in using the debugger. Part 2 focused on additional topics in breakpoints. As your assignments become a little more …
Many modern programming languages support the concept of a property -- a class member that combines characteristics of both a data member and a method.  These are sometimes called "smart fields" because you can add logic that is applied automaticall…
The viewer will learn how to clear a vector as well as how to detect empty vectors in C++.
The viewer will be introduced to the member functions push_back and pop_back of the vector class. The video will teach the difference between the two as well as how to use each one along with its functionality.

730 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question