Method destroyHolder

flow/include/flow/ThreadHelper.actor.h:159–174

Destroy the given MultiCallbackHolder, freeing it if it is not firstHolder.

	// Destroy the given MultiCallbackHolder, freeing it if it is not firstHolder.
	void destroyHolder(MultiCallbackHolder* h) {
		UNSTOPPABLE_ASSERT(h != nullptr);

		// If h is the firstHolder just clear its holder pointer to indicate unusedness
		if (h == &firstHolder) {
			h->multiCallback = nullptr;
		} else {
			// Otherwise unlink h from the doubly linked list and free it
			// h->previous is definitely valid
			h->previous->next = h->next;
			if (h->next) {
				h->next->previous = h->previous;
			}
			delete h;
		}
	}
};

class ThreadMultiCallback final : public ThreadCallback, public FastAllocated<ThreadMultiCallback> {