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ado_device_munmap()

Release a virtual memory region

Synopsis:

#include <audio_driver.h>

int ado_device_munmap( void *addr,
                       unsigned long size );

Arguments:

addr: The address of the virtual memory region.
size: The size of the virtual memory region, in bytes.

Description:

The ado_device_munmap() function releases any virtual memory regions that were mapped into the region, starting at addr that runs for size bytes, rounded up to the next multiple of the page size. Subsequent references to these pages cause a SIGSEGV signal to be set on the process.

If there are no mappings in the specified address range, calling ado_device_munmap() has no effect.

Returns:

-1 if an error occurred (errno is set). Any other value indicates success.

Errors:

EINVAL: The addresses in the specified range are outside the range allowed for the address space of a process.
ENOSYS: Memory unmapping isn't supported by this implementation.

Classification:

QNX Neutrino

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