z/OS Using REXX and z/OS UNIX System Services
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shmlkobtain

z/OS Using REXX and z/OS UNIX System Services
SA23-2283-00 

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>>-shmlkobtain--locktokenvar--shared---------------------------><

Function

shmlkobtain obtains a shared memory lock

Parameters

locktokvar
The variable that contains the lock token.
shared
0
Obtain exclusive.
1
Obtain shared.

Example

'shmlkobtain lk 0'

Usage notes

Upon return, RETVAL contains -1 if the service failed. Otherwise, it contains the count of the number of times the calling thread has the lock held.

Parent topic: Syscall command descriptions

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