Function _rpmalloc_span_release_to_cache

source/extern/rpmalloc.c:1290–1308

Move the span (used for small or medium allocations) to the heap thread cache

//! Move the span (used for small or medium allocations) to the heap thread cache
static void
_rpmalloc_span_release_to_cache(heap_t* heap, span_t* span) {
	rpmalloc_assert(heap == span->heap, "Span heap pointer corrupted");
	rpmalloc_assert(span->size_class < SIZE_CLASS_COUNT, "Invalid span size class");
	rpmalloc_assert(span->span_count == 1, "Invalid span count");
#if ENABLE_ADAPTIVE_THREAD_CACHE || ENABLE_STATISTICS
	atomic_decr32(&heap->span_use[0].current);
#endif
	_rpmalloc_stat_dec(&heap->size_class_use[span->size_class].spans_current);
	if (!heap->finalize) {
		_rpmalloc_stat_inc(&heap->span_use[0].spans_to_cache);
		_rpmalloc_stat_inc(&heap->size_class_use[span->size_class].spans_to_cache);
		if (heap->size_class[span->size_class].cache)
			_rpmalloc_heap_cache_insert(heap, heap->size_class[span->size_class].cache);
		heap->size_class[span->size_class].cache = span;
	} else {
		_rpmalloc_span_unmap(span);
	}
}

//! Initialize a (partial) free list up to next system memory page, while reserving the first block
//! as allocated, returning number of blocks in list