C++ (Cpp) ipconfigBUFFER_ALLOC_INIT Examples

Example #1

File: BufferAllocation_1.c Project: oska874/freertos

BaseType_t xNetworkBuffersInitialise( void )
{
BaseType_t xReturn, x;

	/* Only initialise the buffers and their associated kernel objects if they
	have not been initialised before. */
	if( xNetworkBufferSemaphore == NULL )
	{
		/* In case alternative locking is used, the mutexes can be initialised here */
		ipconfigBUFFER_ALLOC_INIT( );
/*
 * HT: The use of counting semaphores is perfect, good invention
 * It is just that I didn't find the time yet to adopt the newer FreeRTOS kernel
 * which supports it. I tried it and it crashed. Must dive into it some day
 */
		xNetworkBufferSemaphore = xSemaphoreCreateCounting( ipconfigNUM_NETWORK_BUFFER_DESCRIPTORS, ipconfigNUM_NETWORK_BUFFER_DESCRIPTORS );
		configASSERT( xNetworkBufferSemaphore );

		if( xNetworkBufferSemaphore != NULL )
		{
			vListInitialise( &xFreeBuffersList );

			/* Initialise all the network buffers.  The buffer storage comes
			from the network interface, and different hardware has different
			requirements. */
			vNetworkInterfaceAllocateRAMToBuffers( xNetworkBuffers );
			for( x = 0; x < ipconfigNUM_NETWORK_BUFFER_DESCRIPTORS; x++ )
			{
				/* Initialise and set the owner of the buffer list items. */
				vListInitialiseItem( &( xNetworkBuffers[ x ].xBufferListItem ) );
				listSET_LIST_ITEM_OWNER( &( xNetworkBuffers[ x ].xBufferListItem ), &xNetworkBuffers[ x ] );

				/* Currently, all buffers are available for use. */
				vListInsert( &xFreeBuffersList, &( xNetworkBuffers[ x ].xBufferListItem ) );
			}
			
			uxMinimumFreeNetworkBuffers = ipconfigNUM_NETWORK_BUFFER_DESCRIPTORS;
		}
	}

	if( xNetworkBufferSemaphore == NULL )
	{
		xReturn = pdFAIL;
	}
	else
	{
		xReturn = pdPASS;
	}

	return xReturn;
}

Example #2

File: BufferAllocation_1.c Project: cjlano/freertos

BaseType_t xNetworkBuffersInitialise( void )
{
BaseType_t xReturn, x;

	/* Only initialise the buffers and their associated kernel objects if they
	have not been initialised before. */
	if( xNetworkBufferSemaphore == NULL )
	{
		/* In case alternative locking is used, the mutexes can be initialised
		here */
		ipconfigBUFFER_ALLOC_INIT();

		xNetworkBufferSemaphore = xSemaphoreCreateCounting( ( UBaseType_t ) ipconfigNUM_NETWORK_BUFFER_DESCRIPTORS, ( UBaseType_t ) ipconfigNUM_NETWORK_BUFFER_DESCRIPTORS );
		configASSERT( xNetworkBufferSemaphore );

		if( xNetworkBufferSemaphore != NULL )
		{
			vListInitialise( &xFreeBuffersList );

			/* Initialise all the network buffers.  The buffer storage comes
			from the network interface, and different hardware has different
			requirements. */
			vNetworkInterfaceAllocateRAMToBuffers( xNetworkBuffers );
			for( x = 0; x < ipconfigNUM_NETWORK_BUFFER_DESCRIPTORS; x++ )
			{
				/* Initialise and set the owner of the buffer list items. */
				vListInitialiseItem( &( xNetworkBuffers[ x ].xBufferListItem ) );
				listSET_LIST_ITEM_OWNER( &( xNetworkBuffers[ x ].xBufferListItem ), &xNetworkBuffers[ x ] );

				/* Currently, all buffers are available for use. */
				vListInsert( &xFreeBuffersList, &( xNetworkBuffers[ x ].xBufferListItem ) );
			}

			uxMinimumFreeNetworkBuffers = ( UBaseType_t ) ipconfigNUM_NETWORK_BUFFER_DESCRIPTORS;
		}
	}

	if( xNetworkBufferSemaphore == NULL )
	{
		xReturn = pdFAIL;
	}
	else
	{
		xReturn = pdPASS;
	}

	return xReturn;
}