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Chapter 40 Buffer Handler Functions

27-6

27.6 AL_GetBufferStatus

Prototype C\C++

ERRNUM AL_GetBufferStatus(LHLD lhld,

LPDATABUFFSTATUS lpDataBuffStat,

long lBuffNum);

Visual Basic for Windows

Function AL_ GetBufferStatus(ByVal lhld As Long,

lpDataBuffStat As LPDATABUFFSTATUS,

ByVal lBuffNum As Long) As Long

LHLD lhld handle of the LDSD

LPDATABUFFSTATUS lpDataBuffStat address of the LPDATABUFFSTATUS structure

long lBuffNum specifies the buffer number

The AL_ GetBufferStatus function retrieves a buffer’s current status.

Parameter Description

lhld Identifies the instance of the logical device subsystem.

lpDataBuffStat Points to the data buffer status structure to be filled.

lBuffNum Specifies the ID number of the buffer from which the status information is

obtained.

• DONE_BUFFER Gets the next available buffer

Returns:

On success lpDataBuffStat is set with the specified lBuffNum or the next available buffer status, otherwise

ERRNUM contains the last error code that occurred during the call. If lBuffNum is set to DONE_BUFFER

a return value of 0 indicates the buffer is incomplete, a return value of 1 indicates the buffer is complete.

Related Functions:

AL_ClearBufferDoneFlag

Supported Logical Device Subsystems:

Pci55xx Series: ADC0, DAC0, DAC1

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Measurement-computing ADLIB WIN Manual do Utilizador Página 126