On 21 Dec 2002 19:41:54 UT, [EMAIL PROTECTED] wrote:
>I found SemRequest and SemClear to be the functions that i am searching for. But what
>use is SemHandle?
>The documentation doesn't state what the sem_key_low and sem_key_high is (means: I'm
>too dumb to
>understand it). Is this just some random number? How can I create a semamorph-handle
>for use with
>SemClear/SemRequest?
Assuming you are talking about a semaphore, you don't need SemHandle in your case.
Just put a
static ULONG variable in your driver's data segment and use the virtual address of
this variable as
sem_key like this:
ULONG MyRAMSem = 0;
VOID Function(VOID)
{
if( DevHelp_SemRequest((ULONG)(PULONG)&MyRAMSem, TIME_OUT) == 0 )
{
do the critical stuff...
DevHelp_SemClear((ULONG)(PULONG)&MyRAMSem);
}
else
{
...
}
}
SemHandle is used, to allow your driver to access a (16-bit) semaphore created by an
application.
Don't confuse the terms "in-use" and "owned", when reading the documetation...
--
Ruediger "Rudi" Ihle
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