Berkeley DB

db_env_set_func_unmap

						#include <db.h>
						int
						db_env_set_func_unmap(int (*func_unmap)(void *addr, size_t len));
					

Description

The Berkeley DB library requires the ability to unmap a file or shared memory region from memory. The func_unmap argument must conform to the following interface:

int unmap(void *addr, size_t len); 

The addr argument is the argument returned by the db_env_set_func_map function when the file or region was mapped into memory, and the len argument is the same as the len argument specified to the db_env_set_func_map function when the file or region was mapped into memory.

The func_unmap function must return the value of errno on failure and 0 on success.

The db_env_set_func_unmap interface affects the entire application, not ...