extern void ciaaSerialDevices_rxIndication(ciaaDevices_deviceType const * const device, uint32_t const nbyte)
{
/* get serial device */
ciaaSerialDevices_deviceType * serialDevice =
(ciaaSerialDevices_deviceType*) device->layer;
ciaaLibs_CircBufType * cbuf = &serialDevice->rxBuf;
uint32_t head = cbuf->head;
uint32_t rawSpace = ciaaLibs_circBufRawSpace(cbuf, head);
uint32_t space = ciaaLibs_circBufSpace(cbuf, head);
uint32_t read = 0;
TaskType taskID = serialDevice->blocked.taskID;
read = serialDevice->device->read(device->loLayer, ciaaLibs_circBufWritePos(cbuf), rawSpace);
/* if rawSpace is full but more space is avaialble */
if ((read == rawSpace) && (space > rawSpace))
{
read += serialDevice->device->read(
device->loLayer,
&cbuf->buf[0],
space - rawSpace);
}
else
{
if ((read == rawSpace) && (space <= rawSpace))
{
/* data may be lost because not place on the receive buffer */
/* TODO */
}
else
{
/* read less bytes than provided */
/* nothing to do */
}
}
/* update tail */
ciaaLibs_circBufUpdateTail(cbuf, read);
/* if data has been read */
if ( (0 < read) && (255 != taskID) &&
(serialDevice->blocked.fct == (void*) ciaaSerialDevices_read ) )
{
/* invalidate task id */
serialDevice->blocked.taskID = 255; /* TODO add macro */
/* reset blocked function */
serialDevice->blocked.fct = NULL;
/* set task event */
#ifdef POSIXE
SetEvent(taskID, POSIXE);
#endif
}
}
extern size_t ciaaLibs_circBufPut(ciaaLibs_CircBufType * cbuf, void const * data, size_t nbytes)
{
size_t ret = 0;
size_t rawSpace;
/* the head of the circular buffer may be changed, therefore it has to be
* read only once */
size_t head = cbuf->head;
/* check that is enough place */
if (ciaaLibs_circBufSpace(cbuf, head) >= nbytes)
{
rawSpace = ciaaLibs_circBufRawSpace(cbuf, head);
/* check if wrapping is needed */
if (rawSpace >= nbytes)
{
ciaaPOSIX_memcpy(ciaaLibs_circBufWritePos(cbuf), data, nbytes);
}
else
{
ciaaPOSIX_memcpy((void*)(&cbuf->buf[cbuf->tail]), data, rawSpace);
ciaaPOSIX_memcpy((void*)(&cbuf->buf[0]),
(void*)((intptr_t)data + rawSpace),
nbytes-rawSpace);
}
/* calculate new tail position */
ciaaLibs_circBufUpdateTail(cbuf, nbytes);
/* set return value */
ret = nbytes;
}
return ret;
} /* end ciaaLibs_circBufPut */