Library Session Functions

Functions

`A3DStatus`	`A3DDllInitialize`
`A3DStatus`	`A3DDisableHandleSIGSEGV`
`A3DStatus`	`A3DEnableHandleSIGSEGV`
`A3DStatus`	`A3DDllTerminate`
`A3DStatus`	`A3DDllGetVersion`
`A3DStatus`	`A3DDllGetBuildInformation`
`A3DStatus`	`A3DDllIsInitialized`

Detailed Description

group a3d_libsession_functions

Starts, configures, and terminates a session with the library.

The functions in this section start and terminate a session with the library.

Function Documentation

A3DStatus A3DDllInitialize(A3DInt32 iMajorVersion, A3DInt32 iMinorVersion)

Starts a session with the library.

This function initializes the internal structures in the library.

Version: 2.0

Sample code

A3DInt32 iErr = A3D_SUCCESS;
A3DInt32 iMajorVersion = 0, iMinorVersion = 0;

iErr = A3DDllGetVersion( &iMajorVersion, &iMinorVersion );
if( iMajorVersion != A3D_DLL_MAJORVERSION ) 

    iErr = A3D_ERROR;

else if( iMinorVersion < A3D_DLL_MINORVERSION ) 

    iErr = A3D_ERROR;



if( iErr == A3D_SUCCESS ) 
{
    iErr = A3DDllInitialize( A3D_DLL_MAJORVERSION, A3D_DLL_MAJORVERSION );
    if ( iErr == A3D_SUCCESS )
    {
        /* Insert your own code to create/read models */
        /* ... */
        /* At end of process, terminate the DLL use */
        iErr = A3DDllTerminate();
    }
}

Warning

You must call this function before calling any other functions in the HOOPS Exchange, with these exceptions:

You can call A3DDllGetVersion anytime.
To have the library produce an XML trace file, you must call A3DDllActivateXMLTrace before calling this function.

Parameters:

iMajorVersion – The major version of the HOOPS Exchange. Set this value to A3D_DLL_MAJORVERSION
iMinorVersion – The minor version of the HOOPS Exchange. Set this value to A3D_DLL_MINORVERSION

Return values:

`A3D_INITIALIZE_ALREADY_CALLED` –
`A3D_SUCCESS` –

Returns:

A3D_SUCCESS on success, or an error code on failure

A3DStatus A3DDisableHandleSIGSEGV()

Disables internal SIGSEGV handling (Linux only)

This function deactivates the handling of the SIGSEGV signal on Linux. By default, SIGSEGV is handled and an exception is thrown to return A3D_EXCEPTION.

Deprecated:: the default behavior has changed with 11.2 to disable the SIGSEGV handling

Warning

You must call this function before A3DDllInitialize

Return values:

A3D_SUCCESS –
A3D_ERROR – if not on Linux

Returns:

A3D_SUCCESS on success, or an error code on failure

A3DStatus A3DEnableHandleSIGSEGV()

Enables internal SIGSEGV handling (Linux only)

This function activates the handling of the SIGSEGV signal on Linux. When this function is activated, SIGSEGV is handled and an exception is thrown to return A3D_EXCEPTION.

Deprecated:: the default behavior has changed with 11.2 to disable the SIGSEGV handling

Warning

You must call this function before A3DDllInitialize

Return values:

A3D_SUCCESS –
A3D_ERROR – if not on Linux

Returns:

A3D_SUCCESS on success, or an error code on failure

A3DStatus A3DDllTerminate()

Terminates a session with the library.

This function terminates a session with the library. It deallocates memory it has previously allocated for its internal use.

You must call this function to end a session with the library.

Version: 2.0

Warning

You can call this function only after successfully calling A3DDllInitialize.

Warning

When your process is done with A3DLIBS.dll (after calling A3DDllTerminate), you MUST unload that DLL, as shown in the sample code for A3DDllInitialize. Unloading the DLL helps to avoid conflicts that can occur when multiple processes use A3DLIBS.dll.

Warning

Processes must avoid parallel access to A3DLIBS.dll.

Return values:

A3D_INITIALIZE_NOT_CALLED –
A3D_SUCCESS –

Returns:

A3D_SUCCESS on success, or an error code on failure

A3DStatus A3DDllGetVersion(A3DInt32 *piMajorVersion, A3DInt32 *piMinorVersion)

Gets the version identifiers for the currently installed library.

This function returns the version of the currently installed library. Use these version identifiers to determine whether that library is compatible with your application. The value returned through the piMajorVersion argument is identical to the Acrobat version identifier. The value returned through the piMinorVersion argument is specific to the library.

To ensure compatibility, the A3D_DLL_MAJORVERSION must be identical to the major version of currently installed library, and the A3D_DLL_MINORVERSION must be less than or equal to the minor version of the currently installed library.

You can call A3DDllGetVersion anytime, even before calling A3DDllInitialize and after calling A3DDllTerminate. This function does not allocate memory.

Version: 2.0

Return values:: A3D_SUCCESS –
Returns:: A3D_SUCCESS on success, or an error code on failure

A3DStatus A3DDllGetBuildInformation(A3DUTF8Char **ppBuildInformation)

Gets information relative to build.

This function returns build information. This can be asked by support to help solving problem. This function does not allocate memory.

Version: 14.2

Return values:: A3D_SUCCESS –
Returns:: A3D_SUCCESS on success, or an error code on failure

A3DStatus A3DDllIsInitialized()

Gets the status of the library initialization library.

This function returns the status of the library initialization library.

This function does not allocate memory.

Version: 11.0

Return values:: A3D_SUCCESS –
Returns:: A3D_SUCCESS on success, or an error code on failure