ado_attach_interrupt()

Attach a handler function to an interrupt

Synopsis:

#include <audio_driver.h>

int32_t ado_attach_interrupt (
    ado_card_t *card,
    int32_t irq,
    void (*handler) (
              HW_CONTEXT_T *hw_context,
              int32_t irqnum ),
    HW_CONTEXT_T *hw_context );

Arguments:

card

The card argument that io-audio passed to your Audio HW DLL's ctrl_init() function (see the Organization of a Driver chapter).

irq

The interrupt request number.

handler

The handler function. When the handler is invoked, the hw_context and the IRQ number are passed in as arguments.

hw_context

A pointer to your Audio HW DLL's context-specific data, which you created in the ctrl_init() function.

Description:

The ado_attach_interrupt() function attaches a handler function to an interrupt. The handler function runs in user space, not in the kernel space.

The io-audio manager automatically detaches any interrupt handlers when your Audio HW DLL is unmounted.

Returns:

0 on success, or a negative number if an error occurred (errno is set).

Errors:

EAGAIN

Insufficient system resources to create a thread.

Classification:

QNX Neutrino