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multimedia timers synchronization

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  • S Stuart Dootson

    Are you trying to pass multimedia timer events into your window handling code or the other way round? If it's the first option and you're using timerSetEvent, you could do this:

    1. For each timer events, create a kernel event.
    2. Create the the timer event using the flag TIME_CALLBACK_EVENT_SET and pass the kernel event handle as the callback procedure.
    3. Create a thread with a function that (in a loop) does a WaitForMultipleObjects, waiting for any one of the kernel events set by the timers.
    4. When an event is detected in the thread function, POST a window message as appropriate.

    The general pattern of setting kernel events with timer events allows you to transfer the timer event into another thread. BTW - do you realise that the multimedia timer API is obsolete and could easily disappear soon? You might be better off using timer queues (see this article for a description[^]) that, as far as I can tell, have the same resolution and accuracy as multimedia timers. Also, it looks like they're better tied into the Windows synchronisation functionality.

    M Offline
    M Offline
    Mark Salsbery
    wrote on last edited by
    #3

    Stuart Dootson wrote:

    do you realise that the multimedia timer API is obsolete and could easily disappear soon?

    Hi Stuart, Where did you hear that? Link? Mark

    Mark Salsbery Microsoft MVP - Visual C++ :java:

    CPalliniC S 2 Replies Last reply
    0
    • M Mark Salsbery

      Stuart Dootson wrote:

      do you realise that the multimedia timer API is obsolete and could easily disappear soon?

      Hi Stuart, Where did you hear that? Link? Mark

      Mark Salsbery Microsoft MVP - Visual C++ :java:

      CPalliniC Offline
      CPalliniC Offline
      CPallini
      wrote on last edited by
      #4

      Mark Salsbery wrote:

      Hi Stuart, Where did you hear that?

      I told him. ;) :-D

      If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
      This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
      [My articles]

      In testa che avete, signor di Ceprano?

      M 1 Reply Last reply
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      • CPalliniC CPallini

        Mark Salsbery wrote:

        Hi Stuart, Where did you hear that?

        I told him. ;) :-D

        If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
        This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
        [My articles]

        M Offline
        M Offline
        Mark Salsbery
        wrote on last edited by
        #5

        So where did YOU hear that? ;P I don't see any indication that the multimedia timer APIs are deprecated. Mark

        Mark Salsbery Microsoft MVP - Visual C++ :java:

        CPalliniC 1 Reply Last reply
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        • M Mark Salsbery

          So where did YOU hear that? ;P I don't see any indication that the multimedia timer APIs are deprecated. Mark

          Mark Salsbery Microsoft MVP - Visual C++ :java:

          CPalliniC Offline
          CPalliniC Offline
          CPallini
          wrote on last edited by
          #6

          Mark Salsbery wrote:

          So where did YOU hear that

          If I remember well, Stuart Dootson told me. :rolleyes:

          Mark Salsbery wrote:

          I don't see any indication that the multimedia timer APIs are deprecated.

          Because we should keep it secret. :)

          If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
          This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
          [My articles]

          In testa che avete, signor di Ceprano?

          M S 2 Replies Last reply
          0
          • CPalliniC CPallini

            Mark Salsbery wrote:

            So where did YOU hear that

            If I remember well, Stuart Dootson told me. :rolleyes:

            Mark Salsbery wrote:

            I don't see any indication that the multimedia timer APIs are deprecated.

            Because we should keep it secret. :)

            If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
            This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
            [My articles]

            M Offline
            M Offline
            Mark Salsbery
            wrote on last edited by
            #7

            CPallini wrote:

            Because we should keep it secret.

            ok. shhhhh :)

            Mark Salsbery Microsoft MVP - Visual C++ :java:

            1 Reply Last reply
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            • M Mark Salsbery

              Stuart Dootson wrote:

              do you realise that the multimedia timer API is obsolete and could easily disappear soon?

              Hi Stuart, Where did you hear that? Link? Mark

              Mark Salsbery Microsoft MVP - Visual C++ :java:

              S Offline
              S Offline
              Stuart Dootson
              wrote on last edited by
              #8

              That's what I read into this page[^]. Looking at Larry Osterman's blog post[^] again, it's just timeSetEvent and timeKillEvent.

              M 1 Reply Last reply
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              • S Stuart Dootson

                That's what I read into this page[^]. Looking at Larry Osterman's blog post[^] again, it's just timeSetEvent and timeKillEvent.

                M Offline
                M Offline
                Mark Salsbery
                wrote on last edited by
                #9

                Excellent! Thank you :) Mark

                Mark Salsbery Microsoft MVP - Visual C++ :java:

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                • CPalliniC CPallini

                  Mark Salsbery wrote:

                  So where did YOU hear that

                  If I remember well, Stuart Dootson told me. :rolleyes:

                  Mark Salsbery wrote:

                  I don't see any indication that the multimedia timer APIs are deprecated.

                  Because we should keep it secret. :)

                  If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
                  This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
                  [My articles]

                  S Offline
                  S Offline
                  Stuart Dootson
                  wrote on last edited by
                  #10

                  CPallini wrote:

                  Because we should keep it secret

                  But now you've let the cat out of the bag!!! The boys'll be round to sort you out ;)

                  M CPalliniC 2 Replies Last reply
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                  • S Stuart Dootson

                    CPallini wrote:

                    Because we should keep it secret

                    But now you've let the cat out of the bag!!! The boys'll be round to sort you out ;)

                    M Offline
                    M Offline
                    Mark Salsbery
                    wrote on last edited by
                    #11

                    It's only me....I won't tell anyone!

                    Mark Salsbery Microsoft MVP - Visual C++ :java:

                    1 Reply Last reply
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                    • S Stuart Dootson

                      CPallini wrote:

                      Because we should keep it secret

                      But now you've let the cat out of the bag!!! The boys'll be round to sort you out ;)

                      CPalliniC Offline
                      CPalliniC Offline
                      CPallini
                      wrote on last edited by
                      #12

                      Wow the cat is out, hence is alive: we should tell to Mr. Schroedinger... (or is the above another secret?) :-D

                      If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
                      This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
                      [My articles]

                      In testa che avete, signor di Ceprano?

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