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Chapter 40 Buffer Handler Functions

27-3

27.3 AL_GetBuffPtr

Prototype C\C++

LPBUFFSTRUCT AL_GetBuffPtr(LHLD lhld, long lBuffNum);

Visual Basic for Windows

Not supported

LHLD lhld handle of the LDSD

long lBuffNum specifies the buffer

The AL_GetBuffPtr function retrieves a buffer pointer from the LDSD. See section

6.3 THE BUFFER

STRUCTURE for additional details.

Parameter Description

lhld Identifies the instance of the logical device subsystem.

lBuffNum Specifies the buffer ID number from which a pointer is returned.

Returns:

On success LPBUFFSTRUCT points to the desired buffer, otherwise LPBUFFSTRUCT is set to NULL

indicating the buffer is not available. The LPBUFFSTRUCT is a structure defined in adlib.h which

contains a pointer to the buffer and current status information of the buffer. See the Memory Buffer

Allocation chapter for a complete description of buffer handling concepts and the LPBUFFSTRUCT

structure details.

Related Functions:

AL_ClearBufferDoneFlag

AL_GetBufferStatus

Supported Logical Device Subsystems:

Pci55xx Series: ADC0, DAC0, DAC1

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Measurement-computing ADLIB WIN Manuel d'utilisateur Page 123