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Berkeley DB: db_env_set_func_unmap
db_env_set_func_unmap
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#include <db.h>
int
db_env_set_func_unmap(int (*func_unmap)(void *addr, size_t len));
Description: db_env_set_func_unmap
The Berkeley DB library requires the ability to unmap a file or shared memory
region from memory.
The db_env_set_func_unmap method configures all operations performed by a process and
all of its threads of control, not operations confined to a single
database environment.
Although the db_env_set_func_unmap method may be called at any time during the life of
the application, it should normally be called before making calls to the
db_env_create or db_create methods.
The db_env_set_func_unmap method
returns a non-zero error value on failure
and 0 on success.
Parameters
- func_unmap
- The func_unmap parameter is the function which unmaps a file or
shared memory region.
The addr parameter is the value returned by the
db_env_set_func_map function when the file or region was mapped
into memory, and the len parameter is the same as the len
parameter 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.
See Also
Run-time configuration
Copyright (c) 1996-2004 Sleepycat Software, Inc. - All rights reserved.
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