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<TITLE>Int 15/AH=01h
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Int 15/AH=01h - MultiDOS Plus - REQUEST RESOURCE SEMAPHORE -
AH = 01h
AL = semaphore number (00h-3Fh)
Return: AH = status
00h successful
02h invalid semaphore number
Notes: if the semaphore is not owned, ownership is assigned to the calling
task and the call returns immediately
if the semaphore is already owned by another task, the calling task
is placed on a queue for the semaphore and suspended until it can
become owner of the semaphore
">
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<h2>Int 15/AH=01h
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<h3><font color=#C00040>MultiDOS Plus - REQUEST RESOURCE SEMAPHORE</font></h3>
<PRE>
AH = 01h
AL = semaphore number (00h-3Fh)<br>
<p><b>Return:</b><br>AH = status
00h successful
02h invalid semaphore number
</PRE>
<p><b>Notes:</b>
If the semaphore is not owned, ownership is assigned to the calling
task and the call returns immediately.
If the semaphore is already owned by another task, the calling task
is placed on a queue for the semaphore and suspended until it can
become owner of the semaphore.
Semaphore 0 is used internally by MultiDOS to synchronize DOS access
<p><b>See Also:</b>
<a href="rb-1152.htm" tppabs="http://www.ctyme.com/intr/rb-1152.htm">AH=02h"MultiDOS"</a> - <a href="rb-1191.htm" tppabs="http://www.ctyme.com/intr/rb-1191.htm">AH=10h"MultiDOS"</a> - <a href="rb-1310.htm" tppabs="http://www.ctyme.com/intr/rb-1310.htm">AH=1Bh"MultiDOS"</a>
<p>
<b>Category: <a href="cat-011.htm" tppabs="http://www.ctyme.com/intr/cat-011.htm">
DOS-Based Task Switchers/Multitaskers</a>
- <a href="int-15.htm" tppabs="http://www.ctyme.com/intr/int-15.htm">
Int 15h</a>
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M</a>
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