/*!
* \brief This function removes an endpoint.
*
* Removes an endpoint with specified structure / params (core, node and port).
*
* \param[in] endpoint Pointer to the endpoint structure.
*
* \return MCC_SUCCESS
* \return MCC_ERR_ENDPOINT (invalid value for port or the endpoint doesn't exist)
*/
int mcc_remove_endpoint(MCC_ENDPOINT endpoint)
{
int i=0;
/* must be valid */
if(endpoint.port == MCC_RESERVED_PORT_NUMBER)
return MCC_ERR_ENDPOINT;
MCC_DCACHE_INVALIDATE_MLINES(&bookeeping_data->endpoint_table[0], MCC_ATTR_MAX_RECEIVE_ENDPOINTS * sizeof(MCC_ENDPOINT_MAP_ITEM));
for(i = 0; i < MCC_ATTR_MAX_RECEIVE_ENDPOINTS; i++) {
if(MCC_ENDPOINTS_EQUAL(bookeeping_data->endpoint_table[i].endpoint, endpoint)) {
/* clear the queue */
MCC_RECEIVE_BUFFER * buffer = mcc_dequeue_buffer((MCC_RECEIVE_LIST *)&bookeeping_data->endpoint_table[i].list);
while(buffer) {
mcc_queue_buffer(&bookeeping_data->free_list, buffer);
buffer = mcc_dequeue_buffer((MCC_RECEIVE_LIST *)&bookeeping_data->endpoint_table[i].list);
}
/* indicate free */
bookeeping_data->endpoint_table[i].endpoint.port = MCC_RESERVED_PORT_NUMBER;
MCC_DCACHE_FLUSH_MLINES((void*)&bookeeping_data->endpoint_table[i].endpoint.port, sizeof(MCC_PORT));
return MCC_SUCCESS;
}
}
return MCC_ERR_ENDPOINT;
}
/*!
* \brief This function receives a message from the specified endpoint if one is available. The data is NOT copied into the user-app. buffer.
*
* This is the "zero-copy receive" version of the MCC receive function. No data is copied.
* Only the pointer to the data is returned. This version is fast, but it requires the user to manage
* buffer allocation. Specifically, the user must decide when a buffer is no longer in use and
* make the appropriate API call to free it, see mcc_free_buffer.
*
* \param[out] src_endpoint Pointer to the MCC_ENDPOINT structure to be filled by the endpoint identifying the message sender.
* \param[in] dest_endpoint Pointer to the local receiving endpoint to receive from.
* \param[out] buffer_p Pointer to the MCC buffer of the shared memory where the received data is stored.
* \param[out] recv_size Pointer to an MCC_MEM_SIZE that will contain the number of valid bytes in the buffer.
* \param[in] timeout_ms Timeout, in milliseconds, to wait for a free buffer. A value of 0 means don't wait (non-blocking call). A value of 0xffffffff means wait forever (blocking call).
*
* \return MCC_SUCCESS
* \return MCC_ERR_ENDPOINT (the endpoint does not exist)
* \return MCC_ERR_SEMAPHORE (semaphore handling error)
* \return MCC_ERR_TIMEOUT (timeout exceeded before a new message came)
*
* \see mcc_send
* \see mcc_recv
* \see MCC_ENDPOINT
*/
int mcc_recv_nocopy(MCC_ENDPOINT *src_endpoint, MCC_ENDPOINT *dest_endpoint, void **buffer_p, MCC_MEM_SIZE *recv_size, unsigned int timeout_ms)
{
MCC_RECEIVE_LIST *list = null;
int return_value;
return_value = mcc_recv_common_part(dest_endpoint, timeout_ms, (MCC_RECEIVE_LIST**)&list);
if(return_value != MCC_SUCCESS)
return return_value;
/* Semaphore-protected section start */
return_value = mcc_get_semaphore();
if(return_value != MCC_SUCCESS)
return return_value;
MCC_DCACHE_INVALIDATE_MLINES((void*)list, sizeof(MCC_RECEIVE_LIST*));
if(list->head == (MCC_RECEIVE_BUFFER*)0) {
/* Buffer not dequeued before the timeout */
mcc_release_semaphore();
return MCC_ERR_TIMEOUT;
}
/* Get the message pointer from the head of the receive buffer list */
MCC_DCACHE_INVALIDATE_MLINES((void*)&list->head->data, list->head->data_len);
*buffer_p = (void*)&list->head->data;
MCC_DCACHE_INVALIDATE_MLINES((void*)&list->head->source, sizeof(MCC_ENDPOINT) + sizeof(MCC_MEM_SIZE));
mcc_memcpy((void*)&list->head->source, (void*)src_endpoint, sizeof(MCC_ENDPOINT));
*recv_size = (MCC_MEM_SIZE)(list->head->data_len);
/* Dequeue the buffer from the endpoint list */
mcc_dequeue_buffer(list);
/* Semaphore-protected section end */
return_value = mcc_release_semaphore();
if(return_value != MCC_SUCCESS)
return return_value;
return return_value;
}
/*!
* \private
*
* \brief This function dequeues a buffer from the free list.
*
* This is an internal implementation of the mcc_get_buffer() function. It is called
* either from the mcc_send() or from mcc_get_buffer() when the non-copy-send
* mechanism is enabled by the MCC_SEND_RECV_NOCOPY_API_ENABLED macro in mcc_config.h.
*
* \param[out] buffer Pointer to the MCC buffer dequeued from the free list.
* \param[out] buf_size Pointer to an MCC_MEM_SIZE that is used for passing the size of the dequeued MCC buffer to the application.
* \param[in] timeout_ms Timeout, in milliseconds, to wait for a free buffer. A value of 0 means don't wait (non-blocking call). A value of 0xffffffff means wait forever (blocking call).
*
* \return MCC_SUCCESS
* \return MCC_ERR_SEMAPHORE (semaphore handling error)
* \return MCC_ERR_TIMEOUT (timeout exceeded before a buffer became available)
* \return MCC_ERR_NOMEM (no free buffer available and timeout_ms set to 0)
*
* \see mcc_send_nocopy
* \see mcc_send
* \see mcc_get_buffer
*/
static int mcc_get_buffer_internal(void **buffer, MCC_MEM_SIZE *buf_size, unsigned int timeout_ms)
{
int return_value;
MCC_RECEIVE_BUFFER * buf = null;
*buffer = null;
/* Semaphore-protected section start */
return_value = mcc_get_semaphore();
if(return_value != MCC_SUCCESS)
return return_value;
/* Dequeue the buffer from the free list */
MCC_DCACHE_INVALIDATE_MLINES((void*)&bookeeping_data->free_list, sizeof(MCC_RECEIVE_LIST*));
buf = mcc_dequeue_buffer(&bookeeping_data->free_list);
/* Semaphore-protected section end */
mcc_release_semaphore();
if(buf == null) {
/* Non-blocking call */
if(timeout_ms == 0) {
return MCC_ERR_NOMEM;
} else {
/* Wait for the buffer freed event */
return_value = mcc_wait_for_buffer_freed((MCC_RECEIVE_BUFFER **)&buf, timeout_ms);
if(MCC_SUCCESS != return_value) {
return return_value;
}
}
}
/* Return the MCC buffer size and the pointer to the dequeued MCC buffer */
*buf_size = (MCC_MEM_SIZE)sizeof(bookeeping_data->r_buffers[0].data);
*buffer = (void*)buf->data;
return MCC_SUCCESS;
}
/*!
* \brief This function receives a message from the specified endpoint if one is available. The data is NOT copied into the user-app. buffer.
*
* This is the "zero-copy receive" version of the MCC receive function. No data is copied.
* Only the pointer to the data is returned. This version is fast, but it requires the user to manage
* buffer allocation. Specifically, the user must decide when a buffer is no longer in use and
* make the appropriate API call to free it.
*
* \param[in] endpoint Pointer to the receiving endpoint to receive from.
* \param[out] buffer_p Pointer to the MCC buffer of the shared memory where the received data is stored.
* \param[out] recv_size Pointer to an MCC_MEM_SIZE that will contain the number of valid bytes in the buffer.
* \param[in] timeout_us Timeout, in microseconds, to wait for a free buffer. A value of 0 means don't wait (non-blocking call). A value of 0xffffffff means wait forever (blocking call).
*
* \return MCC_SUCCESS
* \return MCC_ERR_ENDPOINT (the endpoint does not exist)
* \return MCC_ERR_SEMAPHORE (semaphore handling error)
* \return MCC_ERR_TIMEOUT (timeout exceeded before a new message came)
*
* \see mcc_send
* \see mcc_recv_copy
* \see MCC_ENDPOINT
*/
int mcc_recv_nocopy(MCC_ENDPOINT *endpoint, void **buffer_p, MCC_MEM_SIZE *recv_size, unsigned int timeout_us)
{
MCC_RECEIVE_LIST *list;
int return_value;
#if (MCC_OS_USED == MCC_MQX)
unsigned int time_us_tmp;
unsigned int lwevent_index = endpoint->port / MCC_MQX_LWEVENT_GROUP_SIZE;
unsigned int lwevent_group_index = endpoint->port % MCC_MQX_LWEVENT_GROUP_SIZE;
MQX_TICK_STRUCT tick_time;
#endif
/* Semaphore-protected section start */
return_value = mcc_get_semaphore();
if(return_value != MCC_SUCCESS)
return return_value;
/* Get list of buffers kept by the particular endpoint */
list = mcc_get_endpoint_list(*endpoint);
/* Semaphore-protected section end */
return_value = mcc_release_semaphore();
if(return_value != MCC_SUCCESS)
return return_value;
/* The endpoint is not valid */
if(list == null) {
return MCC_ERR_ENDPOINT;
}
if(list->head == (MCC_RECEIVE_BUFFER*)0) {
/* Non-blocking call */
if(timeout_us == 0) {
return MCC_ERR_TIMEOUT;
}
/* Blocking call */
else {
#if (MCC_OS_USED == MCC_MQX)
if(timeout_us == 0xFFFFFFFF) {
_lwevent_wait_ticks(&lwevent_buffer_queued[lwevent_index], 1<<lwevent_group_index, TRUE, 0);
}
/* timeout_us > 0 */
else {
_time_get_ticks(&tick_time);
_time_add_usec_to_ticks(&tick_time, timeout_us);
_lwevent_wait_until(&lwevent_buffer_queued[lwevent_index], 1<<lwevent_group_index, TRUE, &tick_time);
}
#endif
MCC_DCACHE_INVALIDATE_MLINES((void*)list, sizeof(MCC_RECEIVE_LIST*));
}
}
/* Clear event bit specified for the particular endpoint in the lwevent_buffer_queued lwevent group */
_lwevent_clear(&lwevent_buffer_queued[lwevent_index], 1<<lwevent_group_index);
if(list->head == (MCC_RECEIVE_BUFFER*)0) {
/* Buffer not dequeued before the timeout */
return MCC_ERR_TIMEOUT;
}
/* Get the message pointer from the head of the receive buffer list */
MCC_DCACHE_INVALIDATE_MLINES((void*)&list->head->data, list->head->data_len);
*buffer_p = (void*)&list->head->data;
MCC_DCACHE_INVALIDATE_MLINES((void*)&list->head->data_len, sizeof(MCC_MEM_SIZE));
*recv_size = (MCC_MEM_SIZE)(list->head->data_len);
/* Semaphore-protected section start */
return_value = mcc_get_semaphore();
if(return_value != MCC_SUCCESS)
return return_value;
/* Dequeue the buffer from the endpoint list */
mcc_dequeue_buffer(list);
/* Semaphore-protected section end */
return_value = mcc_release_semaphore();
if(return_value != MCC_SUCCESS)
return return_value;
return return_value;
}
/*!
* \brief This function receives a message from the specified endpoint if one is available.
* The data will be copied from the receive buffer into the user supplied buffer.
*
* This is the "receive with copy" version of the MCC receive function. This version is simple
* to use but it requires copying data from shared memory into the user space buffer.
* The user has no obligation or burden to manage the shared memory buffers.
*
* \param[in] endpoint Pointer to the receiving endpoint to receive from.
* \param[in] buffer Pointer to the user-app. buffer where data will be copied into.
* \param[in] buffer_size The maximum number of bytes to copy.
* \param[out] recv_size Pointer to an MCC_MEM_SIZE that will contain the number of bytes actually copied into the buffer.
* \param[in] timeout_us Timeout, in microseconds, to wait for a free buffer. A value of 0 means don't wait (non-blocking call). A value of 0xffffffff means wait forever (blocking call).
*
* \return MCC_SUCCESS
* \return MCC_ERR_ENDPOINT (the endpoint does not exist)
* \return MCC_ERR_SEMAPHORE (semaphore handling error)
* \return MCC_ERR_TIMEOUT (timeout exceeded before a new message came)
*
* \see mcc_send
* \see mcc_recv_nocopy
* \see MCC_ENDPOINT
*/
int mcc_recv_copy(MCC_ENDPOINT *endpoint, void *buffer, MCC_MEM_SIZE buffer_size, MCC_MEM_SIZE *recv_size, unsigned int timeout_us)
{
MCC_RECEIVE_LIST *list;
MCC_RECEIVE_BUFFER * buf;
MCC_SIGNAL affiliated_signal;
MCC_ENDPOINT tmp_destination = {(MCC_CORE)0, (MCC_NODE)0, (MCC_PORT)0};
int return_value, i = 0;
#if (MCC_OS_USED == MCC_MQX)
unsigned int time_us_tmp;
unsigned int lwevent_index = endpoint->port / MCC_MQX_LWEVENT_GROUP_SIZE;
unsigned int lwevent_group_index = endpoint->port % MCC_MQX_LWEVENT_GROUP_SIZE;
MQX_TICK_STRUCT tick_time;
#endif
/* Semaphore-protected section start */
return_value = mcc_get_semaphore();
if(return_value != MCC_SUCCESS)
return return_value;
/* Get list of buffers kept by the particular endpoint */
list = mcc_get_endpoint_list(*endpoint);
/* Semaphore-protected section end */
return_value = mcc_release_semaphore();
if(return_value != MCC_SUCCESS)
return return_value;
/* The endpoint is not valid */
if(list == null) {
return MCC_ERR_ENDPOINT;
}
if(list->head == (MCC_RECEIVE_BUFFER*)0) {
/* Non-blocking call */
if(timeout_us == 0) {
return MCC_ERR_TIMEOUT;
}
/* Blocking call */
else {
#if (MCC_OS_USED == MCC_MQX)
if(timeout_us == 0xFFFFFFFF) {
_lwevent_wait_ticks(&lwevent_buffer_queued[lwevent_index], 1<<lwevent_group_index, TRUE, 0);
}
/* timeout_us > 0 */
else {
_time_get_ticks(&tick_time);
_time_add_usec_to_ticks(&tick_time, timeout_us);
_lwevent_wait_until(&lwevent_buffer_queued[lwevent_index], 1<<lwevent_group_index, TRUE, &tick_time);
}
#endif
MCC_DCACHE_INVALIDATE_MLINES((void*)list, sizeof(MCC_RECEIVE_LIST*));
}
}
/* Clear event bit specified for the particular endpoint in the lwevent_buffer_queued lwevent group */
_lwevent_clear(&lwevent_buffer_queued[lwevent_index], 1<<lwevent_group_index);
if(list->head == (MCC_RECEIVE_BUFFER*)0) {
/* Buffer not dequeued before the timeout */
return MCC_ERR_TIMEOUT;
}
/* Copy the message from the MCC receive buffer into the user-app. buffer */
MCC_DCACHE_INVALIDATE_MLINES((void*)&list->head->data_len, sizeof(MCC_MEM_SIZE));
if (list->head->data_len > buffer_size) {
list->head->data_len = buffer_size;
}
*recv_size = (MCC_MEM_SIZE)(list->head->data_len);
MCC_DCACHE_INVALIDATE_MLINES((void*)&list->head->data, list->head->data_len);
mcc_memcpy((void*)list->head->data, buffer, list->head->data_len);
/* Semaphore-protected section start */
return_value = mcc_get_semaphore();
if(return_value != MCC_SUCCESS)
return return_value;
/* Dequeue the buffer from the endpoint list */
buf = mcc_dequeue_buffer(list);
/* Enqueue the buffer into the free list */
MCC_DCACHE_INVALIDATE_MLINES((void*)&bookeeping_data->free_list, sizeof(MCC_RECEIVE_LIST*));
mcc_queue_buffer(&bookeeping_data->free_list, buf);
/* Notify all cores (except of itself) via CPU-to-CPU interrupt that a buffer has been freed */
affiliated_signal.type = BUFFER_FREED;
affiliated_signal.destination = tmp_destination;
for (i=0; i<MCC_NUM_CORES; i++) {
if(i != MCC_CORE_NUMBER) {
mcc_queue_signal(i, affiliated_signal);
}
}
mcc_generate_cpu_to_cpu_interrupt();
/* Semaphore-protected section end */
return_value = mcc_release_semaphore();
if(return_value != MCC_SUCCESS)
return return_value;
return return_value;
}
/*!
* \brief This function sends a message to an endpoint.
*
* The message is copied into the MCC buffer and the destination core is signaled.
*
* \param[in] endpoint Pointer to the receiving endpoint to send to.
* \param[in] msg Pointer to the message to be sent.
* \param[in] msg_size Size of the message to be sent in bytes.
* \param[in] timeout_us Timeout, in microseconds, to wait for a free buffer. A value of 0 means don't wait (non-blocking call). A value of 0xffffffff means wait forever (blocking call).
*
* \return MCC_SUCCESS
* \return MCC_ERR_ENDPOINT (the endpoint does not exist)
* \return MCC_ERR_SEMAPHORE (semaphore handling error)
* \return MCC_ERR_INVAL (the msg_size exceeds the size of a data buffer)
* \return MCC_ERR_TIMEOUT (timeout exceeded before a buffer became available)
* \return MCC_ERR_NOMEM (no free buffer available and timeout_us set to 0)
* \return MCC_ERR_SQ_FULL (signal queue is full)
*
* \see mcc_recv_copy
* \see mcc_recv_nocopy
* \see MCC_ENDPOINT
*/
int mcc_send(MCC_ENDPOINT *endpoint, void *msg, MCC_MEM_SIZE msg_size, unsigned int timeout_us)
{
int return_value, end_time_set_flag = 0;
MCC_RECEIVE_LIST *list;
MCC_RECEIVE_BUFFER * buf;
MCC_SIGNAL affiliated_signal;
#if (MCC_OS_USED == MCC_MQX)
unsigned int time_us_tmp;
MQX_TICK_STRUCT tick_time;
#endif
/* Check if the size of the message to be sent does not exceed the size of the mcc buffer */
if(msg_size > sizeof(bookeeping_data->r_buffers[0].data)) {
return MCC_ERR_INVAL;
}
/* Semaphore-protected section start */
return_value = mcc_get_semaphore();
if(return_value != MCC_SUCCESS)
return return_value;
/* Dequeue the buffer from the free list */
MCC_DCACHE_INVALIDATE_MLINES((void*)&bookeeping_data->free_list, sizeof(MCC_RECEIVE_LIST*));
buf = mcc_dequeue_buffer(&bookeeping_data->free_list);
while(buf == null) {
mcc_release_semaphore();
/* Non-blocking call */
if(timeout_us == 0) {
return MCC_ERR_NOMEM;
}
/* Blocking calls: CPU-to-CPU ISR sets the event and thus resumes tasks waiting for a free MCC buffer.
* As the interrupt request is send to all cores when a buffer is freed it could happen that several
* tasks from different cores/nodes are waiting for a free buffer and all of them are notified that the buffer
* has been freed. This function has to check (after the wake up) that a buffer is really available and has not been already
* grabbed by another "competitor task" that has been faster. If so, it has to wait again for the next notification. */
/* wait forever */
else if(timeout_us == 0xFFFFFFFF) {
#if (MCC_OS_USED == MCC_MQX)
_lwevent_wait_ticks(&lwevent_buffer_freed, 1, TRUE, 0);
_lwevent_clear(&lwevent_buffer_freed, 1);
#endif
}
/* timeout_us > 0 */
else {
#if (MCC_OS_USED == MCC_MQX)
if(!end_time_set_flag) {
_time_get_ticks(&tick_time);
_time_add_usec_to_ticks(&tick_time, timeout_us);
end_time_set_flag = 1;
}
return_value = _lwevent_wait_until(&lwevent_buffer_freed, 1, TRUE, &tick_time);
if(return_value == LWEVENT_WAIT_TIMEOUT) {
/* Buffer not dequeued before the timeout */
return MCC_ERR_TIMEOUT;
}
_lwevent_clear(&lwevent_buffer_freed, 1);
#endif
}
MCC_DCACHE_INVALIDATE_MLINES((void*)&bookeeping_data->free_list, sizeof(MCC_RECEIVE_LIST*));
mcc_get_semaphore();
buf = mcc_dequeue_buffer(&bookeeping_data->free_list);
}
/* Semaphore-protected section end */
mcc_release_semaphore();
if(return_value != MCC_SUCCESS)
return return_value;
/* Copy the message into the MCC receive buffer */
mcc_memcpy(msg, (void*)buf->data, (unsigned int)msg_size);
MCC_DCACHE_FLUSH_MLINES((void*)buf->data, msg_size);
buf->data_len = msg_size;
MCC_DCACHE_FLUSH_MLINES((void*)&buf->data_len, sizeof(MCC_MEM_SIZE));
/* Semaphore-protected section start */
return_value = mcc_get_semaphore();
if(return_value != MCC_SUCCESS)
return return_value;
/* Get list of buffers kept by the particular endpoint */
list = mcc_get_endpoint_list(*endpoint);
if(list == null) {
/* The endpoint does not exists (has not been registered so far),
free the buffer and return immediately - error */
/* Enqueue the buffer back into the free list */
MCC_DCACHE_INVALIDATE_MLINES((void*)&bookeeping_data->free_list, sizeof(MCC_RECEIVE_LIST*));
mcc_queue_buffer(&bookeeping_data->free_list, buf);
mcc_release_semaphore();
return MCC_ERR_ENDPOINT;
}
/* Write the signal type into the signal queue of the particular core */
affiliated_signal.type = BUFFER_QUEUED;
affiliated_signal.destination = *endpoint;
return_value = mcc_queue_signal(endpoint->core, affiliated_signal);
if(return_value != MCC_SUCCESS) {
/* Signal queue is full, free the buffer and return immediately - error */
MCC_DCACHE_INVALIDATE_MLINES((void*)&bookeeping_data->free_list, sizeof(MCC_RECEIVE_LIST*));
mcc_queue_buffer(&bookeeping_data->free_list, buf);
mcc_release_semaphore();
return return_value;
}
/* Enqueue the buffer into the endpoint buffer list */
mcc_queue_buffer(list, buf);
/* Semaphore-protected section end */
mcc_release_semaphore();
if(return_value != MCC_SUCCESS)
return return_value;
/* Signal the other core by generating the CPU-to-CPU interrupt */
return_value = mcc_generate_cpu_to_cpu_interrupt();
return return_value;
}
/*!
* \brief This function receives a message from the specified endpoint if one is available.
* The data is copied from the receive buffer into the user supplied buffer.
*
* This is the "receive with copy" version of the MCC receive function. This version is simple
* to use but it requires copying data from shared memory into the user space buffer.
* The user has no obligation or burden to manage the shared memory buffers.
*
* \param[out] src_endpoint Pointer to the MCC_ENDPOINT structure to be filled by the endpoint identifying the message sender.
* \param[in] dest_endpoint Pointer to the local receiving endpoint to receive from.
* \param[in] buffer Pointer to the user-app. buffer where data will be copied into.
* \param[in] buffer_size The maximum number of bytes to copy.
* \param[out] recv_size Pointer to an MCC_MEM_SIZE that will contain the number of bytes actually copied into the buffer.
* \param[in] timeout_ms Timeout, in milliseconds, to wait for a free buffer. A value of 0 means don't wait (non-blocking call). A value of 0xffffffff means wait forever (blocking call).
*
* \return MCC_SUCCESS
* \return MCC_ERR_ENDPOINT (the endpoint does not exist)
* \return MCC_ERR_SEMAPHORE (semaphore handling error)
* \return MCC_ERR_TIMEOUT (timeout exceeded before a new message came)
*
* \see mcc_send
* \see mcc_recv_nocopy
* \see MCC_ENDPOINT
*/
int mcc_recv(MCC_ENDPOINT *src_endpoint, MCC_ENDPOINT *dest_endpoint, void *buffer, MCC_MEM_SIZE buffer_size, MCC_MEM_SIZE *recv_size, unsigned int timeout_ms)
{
MCC_RECEIVE_LIST *list = null;
MCC_RECEIVE_BUFFER * buf;
MCC_SIGNAL affiliated_signal;
MCC_ENDPOINT tmp_destination = {(MCC_CORE)0, (MCC_NODE)0, (MCC_PORT)0};
int return_value, i = 0;
return_value = mcc_recv_common_part(dest_endpoint, timeout_ms, (MCC_RECEIVE_LIST**)&list);
if(return_value != MCC_SUCCESS)
return return_value;
/* Semaphore-protected section start */
return_value = mcc_get_semaphore();
if(return_value != MCC_SUCCESS)
return return_value;
MCC_DCACHE_INVALIDATE_MLINES((void*)list, sizeof(MCC_RECEIVE_LIST*));
if(list->head == (MCC_RECEIVE_BUFFER*)0) {
/* Buffer not dequeued before the timeout */
mcc_release_semaphore();
return MCC_ERR_TIMEOUT;
}
/* Copy the message from the MCC receive buffer into the user-app. buffer */
MCC_DCACHE_INVALIDATE_MLINES((void*)&list->head->source, sizeof(MCC_ENDPOINT) + sizeof(MCC_MEM_SIZE));
mcc_memcpy((void*)&list->head->source, (void*)src_endpoint, sizeof(MCC_ENDPOINT));
if (list->head->data_len > buffer_size) {
list->head->data_len = buffer_size;
}
*recv_size = (MCC_MEM_SIZE)(list->head->data_len);
MCC_DCACHE_INVALIDATE_MLINES((void*)&list->head->data, list->head->data_len);
mcc_memcpy((void*)list->head->data, buffer, list->head->data_len);
/* Dequeue the buffer from the endpoint list */
list->head = (MCC_RECEIVE_BUFFER*)MCC_MEM_VIRT_TO_PHYS(list->head);
buf = mcc_dequeue_buffer(list);
/* Enqueue the buffer into the free list */
MCC_DCACHE_INVALIDATE_MLINES((void*)&bookeeping_data->free_list, sizeof(MCC_RECEIVE_LIST*));
mcc_queue_buffer(&bookeeping_data->free_list, buf);
/* Notify all cores (except of itself) via CPU-to-CPU interrupt that a buffer has been freed */
affiliated_signal.type = BUFFER_FREED;
affiliated_signal.destination = tmp_destination;
for (i=0; i<MCC_NUM_CORES; i++) {
if(i != MCC_CORE_NUMBER) {
mcc_queue_signal(i, affiliated_signal);
}
}
/* Semaphore-protected section end */
return_value = mcc_release_semaphore();
mcc_generate_cpu_to_cpu_interrupt();
if(return_value != MCC_SUCCESS)
return return_value;
return return_value;
}
