swrallocsetopts

swrallocsetopts is a runtime API used to configure the swralloc memory allocator. It allows applications to adjust allocator behavior at runtime, enabling tuning for performance, memory usage, or debugging without recompiling.

The function is designed to apply a set of options to the active swralloc configuration. The exact signature can vary by implementation, but it generally accepts either a pointer to a configuration structure or a set of option flags, and returns a status code. A typical result is zero on success and a non-zero error code on failure, with optional errno details.

Commonly adjustable aspects include memory alignment requirements, maximum allocation size, caching or fragmentation policies, and logging or tracing level. Some implementations may also permit selecting a specific memory pool, enabling lightweight checks, or toggling debug instrumentation. The options are intended to be sufficient to tailor swralloc to the demands of a given workload while avoiding recompilation.

Usage considerations include invoking swrallocsetopts before performing large volumes of allocations or during system initialization, since changing configuration midstream can affect performance or behavior. Thread-safety and scope (process-wide vs. thread-local) depend on the platform and allocator design; documentation for a specific implementation should be consulted for precise guarantees.

Return values typically indicate success or provide an error code describing invalid options, unsupported features, or improper sequencing. As with other allocator controls, change management and rollback strategies should be planned in production environments.

See also: swralloc, swrallocinit, and related allocator configuration interfaces in the same subsystem.