Function extent_alloc

app/redis-6.2.6/deps/jemalloc/src/extent.c:176–187

}

extent_t *
extent_alloc(tsdn_t *tsdn, arena_t *arena) {
	malloc_mutex_lock(tsdn, &arena->extent_avail_mtx);
	extent_t *extent = extent_avail_first(&arena->extent_avail);
	if (extent == NULL) {
		malloc_mutex_unlock(tsdn, &arena->extent_avail_mtx);
		return base_alloc_extent(tsdn, arena->base);
	}
	extent_avail_remove(&arena->extent_avail, extent);
	malloc_mutex_unlock(tsdn, &arena->extent_avail_mtx);
	return extent;
}

void
extent_dalloc(tsdn_t *tsdn, arena_t *arena, extent_t *extent) {