ACX_CIRCUIT_PNPPOWER_CALLBACKS structure (acxcircuit.h)
The ACX_CIRCUIT_PNPPOWER_CALLBACKS structure contains pointers to an ACXCIRCUIT's Plug and Play and power event callback.
Syntax
typedef struct _ACX_CIRCUIT_PNPPOWER_CALLBACKS {
ULONG Size;
PFN_ACX_CIRCUIT_PREPARE_HARDWARE EvtAcxCircuitPrepareHardware;
PFN_ACX_CIRCUIT_RELEASE_HARDWARE EvtAcxCircuitReleaseHardware;
PFN_ACX_CIRCUIT_POWER_UP EvtAcxCircuitPowerUp;
PFN_ACX_CIRCUIT_POWER_DOWN EvtAcxCircuitPowerDown;
} ACX_CIRCUIT_PNPPOWER_CALLBACKS, *PACX_CIRCUIT_PNPPOWER_CALLBACKS;
Members
Size
The size, in bytes, of this structure.
EvtAcxCircuitPrepareHardware
A pointer to the driver's ACX_CIRCUIT_PREPARE_HARDWARE callback event callback function, or NULL.
EvtAcxCircuitReleaseHardware
A pointer to the driver's ACX_CIRCUIT_RELEASE_HARDWARE callback event callback function, or NULL.
EvtAcxCircuitPowerUp
A pointer to the ACX_CIRCUIT_POWER_UP callback event callback function, or NULL.
EvtAcxCircuitPowerDown
A pointer to the ACX_CIRCUIT_POWER_DOWN callback event callback function, or NULL.
Remarks
The ACX_CIRCUIT_PNPPOWER_CALLBACKS structure is used as input to the AcxCircuitInitSetAcxCircuitPnpPowerCallbacks method.
Your driver should initialize its ACX_CIRCUIT_PNPPOWER_CALLBACKS structure by calling ACX_CIRCUIT_PNPPOWER_CALLBACKS_INIT.
Example
Example usage is shown below.
//
// Assign the circuit's pnp-power callbacks.
//
{
ACX_CIRCUIT_PNPPOWER_CALLBACKS powerCallbacks;
ACX_CIRCUIT_PNPPOWER_CALLBACKS_INIT(&powerCallbacks);
powerCallbacks.EvtAcxCircuitPowerUp = EvtCircuitPowerUp;
powerCallbacks.EvtAcxCircuitPowerDown = EvtCircuitPowerDown;
AcxCircuitInitSetAcxCircuitPnpPowerCallbacks(CircuitInit, &powerCallbacks);
}
status = AcxCircuitInitAssignAcxCreateStreamCallback(CircuitInit, EvtCircuitCreateStream);
ACX requirements
Minimum ACX version: 1.0
For more information about ACX versions, see ACX version overview.
Requirements
| Requirement | Value |
|---|---|
| Header | acxcircuit.h |