Use ThreadLocal caching for ExtendedRandom PRNG contexts#1508
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Add ThreadLocal caching for native PRNG contexts used by ExtendedRandom. Each thread creates and reuses a PRNG context for supported DRBG algorithms. This avoids repeated EXTRAND_create calls when instances are created frequently. Benefits: - Reduce native allocation overhead - Reuse PRNG contexts per thread - Improve performance in RNG-heavy workloads Signed-off-by: Tao Liu <tao.liu@ibm.com>
ThreadLocal can cause native TCB context issues on z/OS. This change bypasses ThreadLocal on z/OS by creating instance-specific PRNG contexts, while other platforms continue using ThreadLocal for performance. Signed-off-by: Tao Liu <tao.liu@ibm.com>
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Add ThreadLocal caching for native PRNG contexts used by ExtendedRandom. Each thread creates and reuses a PRNG context for supported DRBG algorithms.
This avoids repeated EXTRAND_create calls when instances are created frequently.
Benefits:
This PR is back-ported from PR #1255