This is supported on
target_arch="nvptx" or target_arch="nvptx64" only.Expand description
Free previously dynamically allocated memory.
The CUDA in-kernel free() function deallocates the memory pointed to by ptr,
which must have been returned by a previous call to malloc(). If ptr is NULL,
the call to free() is ignored.
Any CUDA thread may free memory allocated by another thread, but care should be taken
to ensure that the same pointer is not freed more than once. Repeated calls to free()
with the same ptr has undefined behavior.
Sources: Programming Guide, PTX Interoperability.