vkCmdUnmapDeviceMemory

vkCmdUnmapDeviceMemory is a function in the Vulkan API, a low-level graphics and compute API. It is used to unmap a previously mapped memory object that was mapped for host access using the vkMapMemory function. This function is part of the Vulkan command buffer recording process, which is used to build a sequence of commands to be executed on the GPU.

The vkCmdUnmapDeviceMemory function takes three parameters: a command buffer, a memory object, and an offset. The command buffer is the command buffer into which the unmap command will be recorded. The memory object is the memory object that was previously mapped for host access. The offset is the offset within the memory object where the mapping began.

When the command buffer is submitted to a queue, the unmap command will be executed, and the memory object will be unmapped. This allows the GPU to access the memory object again, and the host can no longer access the mapped region of the memory object.

It is important to note that the vkCmdUnmapDeviceMemory function does not immediately unmap the memory object. Instead, it records an unmap command into the command buffer, which will be executed when the command buffer is submitted to a queue. This allows for more efficient memory management and can help to reduce the number of synchronization points between the host and the GPU.

In summary, vkCmdUnmapDeviceMemory is a Vulkan function used to unmap a previously mapped memory object. It records an unmap command into a command buffer, which will be executed when the command buffer is submitted to a queue. This function is an important part of the Vulkan API and is used to manage memory access between the host and the GPU.