Re: deleting variable for playing audio results in crash

From:
Rehmet <rgnurrahmat@gmail.com>
Newsgroups:
microsoft.public.vc.mfc
Date:
Wed, 23 Apr 2008 00:04:45 -0700 (PDT)
Message-ID:
<d2170caa-0d3a-4c22-98ea-53ed8a77cdcb@k37g2000hsf.googlegroups.com>

DO NOT EVER USE SuspendThread! This is just wrong! How do you know where the thread is
when you suspend it? Rethink the design. For example, if it happens to be in the
storage allocator when you call SuspendThread, no other thread in your process will be
able to do storage allocation; they will all hang.

How do you think the record thread is going to handle that WM_RECORDSOUND_STOPRECORDING
message if it is suspended?

We would need to know what the record thread is doing and how it is doing it before we
could tell you the correct way to handle this, but SuspendThread is a guaranteed way to
catastrophic failure.

----------------------------
Start:
record->PostThreadMessage(WM_RECORDSOUND_STOPRECORDING,0,0);
play1->PostThreadMessage(WM_PLAYSOUND_STARTPLAYING,0,0);

Stop:
record->PostThreadMessage(WM_RECORDSOUND_STOPRECORDING,0,0);
play1->PostThreadMessage(WM_PLAYSOUND_STOPPLAYING,0,0);

Exit (delete):
if(record->recording==TRUE)
{
    record->PostThreadMessage(WM_RECORDSOUND_STOPRECORDING,0,0);
    record->PostThreadMessage(WM_RECORDSOUND_ENDTHREAD,0,0);
}
if(record->recording!= -17891602)
{
    ::PostQuitMessage(0);
    delete record;
}

if(play1->Playing==TRUE)
{
    play1->PostThreadMessage(WM_PLAYSOUND_STOPPLAYING,0,0);
    play1->PostThreadMessage(WM_PLAYSOUND_ENDTHREAD,0,0);
}
if(play1->Playing!=-17891602)
{
    play1->ExitInstance();
    delete play1;
}

Regards,
Rehmet

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