3.2.6. DVB munmap()
3.2.6.1. Name
dmx-munmap - Unmap device memory
Warning
This API is still experimental.
3.2.6.2. Synopsis
#include <unistd.h>
#include <sys/mman.h>
-
int
munmap
(void *start, size_t length)
3.2.6.3. Arguments
start
- Address of the mapped buffer as returned by the
mmap() function.
length
- Length of the mapped buffer. This must be the same value as given to
mmap().
3.2.6.4. Description
Unmaps a previously with the mmap() function mapped
buffer and frees it, if possible.
3.2.6.5. Return Value
On success munmap() returns 0, on failure -1 and the
errno
variable is set appropriately:
- EINVAL
- The
start
or length
is incorrect, or no buffers have been
mapped yet.