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Using ENQ/DEQ or Latch Manager Services with Enclaves z/OS MVS Programming: Workload Management Services SC34-2663-00 |
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Using ENQ/DEQ or Latch Manager Services with EnclavesThere are some considerations to be aware of when using enclaves for tasks or SRBs that serialize on resources using the ENQ macro or the latch manager callable services. A task cannot change its transaction status, that is, cannot join or leave an enclave, while holding a resource using ENQ or the latch manager; an SRB cannot issue SYSEVENT ENCASSOC while holding a resource using the latch manager. Otherwise, enqueue promotion processing may not work properly. The recommended sequence is:
In addition, to ensure correct enqueue promotion processing, a task executing in an enclave should not make the following types of ENQ requests:
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