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git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@8623 35acf78f-673a-0410-8e92-d51de3d6d3f4

master
Giovanni Di Sirio 2015-12-20 10:53:58 +00:00
parent 5a1884c287
commit 0fcf05cf4c
1 changed files with 25 additions and 14 deletions
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37
os/hal/src/hal_buffers.c
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@ -80,7 +80,7 @@ void ibqObjectInit(input_buffers_queue_t *ibqp, uint8_t *bp,
* @brief Gets the next empty buffer from the queue.
* @note The function always returns the same buffer if called repeatedly.
*
* @param[out] ibqp pointer to the @p input_buffers_queue_t object
* @param[in] ibqp pointer to the @p input_buffers_queue_t object
* @return A pointer to the next buffer to be filled.
* @retval NULL if the queue is full.
*
@ -100,7 +100,7 @@ uint8_t *ibqGetEmptyBufferI(input_buffers_queue_t *ibqp) {
/**
* @brief Posts a new filled buffer in the queue.
*
* @param[out] ibqp pointer to the @p input_buffers_queue_t object
* @param[in] ibqp pointer to the @p input_buffers_queue_t object
* @param[in] size used size of the buffer
*
* @iclass
@ -131,24 +131,37 @@ void ibqPostBufferI(io_buffers_queue_t *ibqp, size_t size) {
* at beginning and end of the buffer data or @NULL if the queue
* is empty.
*
* @param[out] ibqp pointer to the @p input_buffers_queue_t object
* @param[in] ibqp pointer to the @p input_buffers_queue_t object
* @param[in] timeout the number of ticks before the operation timeouts,
* the following special values are allowed:
* - @a TIME_IMMEDIATE immediate timeout.
* - @a TIME_INFINITE no timeout.
* .
* @return A pointer to filled buffer area.
* @retval NULL if the queue is empty.
* @retval MSG_OK if a buffer has been acquired.
* @retval MSG_TIMEOUT if the specified time expired.
* @retval MSG_RESET if the queue has been reset.
*
* @iclass
*/
uint8_t *ibqGetFullBufferI(input_buffers_queue_t *ibqp) {
msg_t ibqGetFullBufferTimeoutI(input_buffers_queue_t *ibqp,
systime_t timeout) {
osalDbgCheckClassI();
if (ibqIsEmptyI(ibqp)) {
while (ibqIsEmptyI(ibqp)) {
msg_t msg = osalThreadEnqueueTimeoutS(&ibqp->waiting, timeout);
if (msg < Q_OK) {
ibqp->ptr = NULL;
return NULL;
return msg;
}
}
/* Buffer boundaries.*/
ibqp->ptr = ibqp->brdptr + sizeof (size_t);
ibqp->top = ibqp->ptr + *((size_t *)ibqp->brdptr);
return ibqp->brdptr;
return MSG_OK;
}
/**
@ -203,13 +216,11 @@ msg_t ibqGetTimeout(input_buffers_queue_t *ibqp, systime_t timeout) {
msg_t msg;
/* This condition indicates that a new buffer must be acquired.*/
while (ibqp->ptr == NULL) {
msg = osalThreadEnqueueTimeoutS(&ibqp->waiting, timeout);
if (msg < MSG_OK) {
if (ibqp->ptr == NULL) {
msg = ibqGetFullBufferTimeoutI(ibqp, timeout);
if (msg != MSG_OK) {
return msg;
}
/* Tries to get the buffer, the fields ptr and top are setup inside.*/
(void) ibqGetFullBufferI(ibqp);
}
/* Next byte from the buffer.*/