vkResetDescriptorPool

To return all descriptor sets allocated from a given pool to the pool, rather than freeing individual descriptor sets, call:

VkResult vkResetDescriptorPool(
    VkDevice device,
    VkDescriptorPool descriptorPool,
    VkDescriptorPoolResetFlags flags);

• device is the logical device that owns the descriptor pool.
• descriptorPool is the descriptor pool to be reset.
• flags is reserved for future use.

Resetting a descriptor pool recycles all of the resources from all of the descriptor sets allocated from the descriptor pool back to the descriptor pool, and the descriptor sets are implicitly freed.