out16(), outbe16(), outle16()

Write a 16-bit value to a port

Synopsis:

#include <hw/inout.h>

void out16( uintptr_t port, 
            uint16_t val );

#define outbe16( port,
                 val ) ...

#define outle16( port,
                 val ) ...

Library:

libc

Description:

The out16() function writes the native-endian 16-bit value, specified by val, to the specified port.

The outbe16() and outle16() macros write the native-endian 16-bit value, specified by val, to the specified port in big-endian or little-endian format, respectively.

Classification:

QNX 6

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

Caveats:

The calling thread must have I/O privileges; see ThreadCtl()'s _NTO_TCTL_IO command for details.

The calling process must also use mmap_device_io() to access the device's I/O registers.

outbe16() and outle16() are implemented as macros.