1 .. SPDX-License-Identifier: GFDL-1.1-no-invari
2 .. c:namespace:: DTV.dmx
3
4 .. _dmx-munmap:
5
6 ************
7 DVB munmap()
8 ************
9
10 Name
11 ====
12
13 dmx-munmap - Unmap device memory
14
15 .. warning:: This API is still experimental.
16
17 Synopsis
18 ========
19
20 .. code-block:: c
21
22 #include <unistd.h>
23 #include <sys/mman.h>
24
25 .. c:function:: int munmap( void *start, size_
26
27 Arguments
28 =========
29
30 ``start``
31 Address of the mapped buffer as returned b
32 :c:func:`mmap()` function.
33
34 ``length``
35 Length of the mapped buffer. This must be
36 :c:func:`mmap()`.
37
38 Description
39 ===========
40
41 Unmaps a previously with the :c:func:`mmap()`
42 buffer and frees it, if possible.
43
44 Return Value
45 ============
46
47 On success :c:func:`munmap()` returns 0, on fa
48 ``errno`` variable is set appropriately:
49
50 EINVAL
51 The ``start`` or ``length`` is incorrect,
52 mapped yet.
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