munmap_device

Free access to a device's registers

Warning: Use munmap() instead of munmap_device_io(). The munmap_device_io() function is a wrapper function for munmap() and is only provided for backwards compatibility.

Synopsis:

#include <sys/mman.h>

int munmap_device_io( uintptr_t io,
                      size_t len );

Arguments:

io: The address of the area that you want to unmap.
len: The number of bytes of device I/O memory that you want to unmap.

Library:

libc

Use the -l c option to qcc to link against this library. This library is usually included automatically.

Description:

The function munmap_device_io() unmaps len bytes of device I/O memory at io (that was previously mapped with mmap_device_io()).

Returns:

-1: An error occurred (errno is set).
Any other value: Successful unmapping.

Errors:

See munmap().

Classification:

QNX Neutrino

Safety:
Cancellation point	No
Interrupt handler	No
Signal handler	Yes
Thread	Yes