POOL_MANAGER_ACTIVE
if (pool->flags & POOL_MANAGER_ACTIVE)
pool->flags |= POOL_MANAGER_ACTIVE;
pool->flags &= ~POOL_MANAGER_ACTIVE;
if (!(pool->flags & POOL_MANAGER_ACTIVE) ||
!(pool->flags & POOL_MANAGER_ACTIVE),
if (!(pool->flags & POOL_MANAGER_ACTIVE)) {
pool->flags |= POOL_MANAGER_ACTIVE;
bool managing = pool->flags & POOL_MANAGER_ACTIVE;