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git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@1504 35acf78f-673a-0410-8e92-d51de3d6d3f4

master
gdisirio 2010-01-06 09:40:39 +00:00
parent 4165c207ca
commit 78167cbb9f
1 changed files with 44 additions and 20 deletions
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48
os/kernel/src/chqueues.c
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@ -131,8 +131,8 @@ msg_t chIQGetTimeout(InputQueue *iqp, systime_t time) {
* been reset.
* @note The function is not atomic, if you need atomicity it is suggested
* to use a semaphore or a mutex for mutual exclusion.
* @note The queue callback is invoked one time <b>for each</b> byte removed
* from the queue.
* @note The queue callback is invoked before entering a sleep state and at
* the end of the transfer.
*
* @param[in] iqp pointer to an @p InputQueue structure
* @param[out] bp pointer to the data buffer
@ -149,12 +149,18 @@ size_t chIQReadTimeout(InputQueue *iqp, uint8_t *bp,
qnotify_t nfy = iqp->q_notify;
size_t r = 0;
do {
chSysLock();
if (chSemWaitTimeoutS(&iqp->q_sem, time) != RDY_OK) {
while (TRUE) {
if (chIQIsEmpty(iqp)) {
if (nfy)
nfy();
if ((chSemWaitTimeoutS(&iqp->q_sem, time) != RDY_OK)) {
chSysUnlock();
return r;
}
}
else
chSemFastWaitI(&iqp->q_sem);
*bp++ = *iqp->q_rdptr++;
if (iqp->q_rdptr >= iqp->q_top)
iqp->q_rdptr = iqp->q_buffer;
@ -162,9 +168,16 @@ size_t chIQReadTimeout(InputQueue *iqp, uint8_t *bp,
nfy();
chSysUnlock(); /* Gives a preemption chance in a controlled point.*/
r++;
} while (--n > 0);
if (--n == 0) {
chSysLock();
if (nfy)
nfy();
chSysUnlock();
return r;
}
chSysLock();
}
}
/**
* @brief Initializes an output queue.
@ -270,8 +283,8 @@ msg_t chOQGetI(OutputQueue *oqp) {
* been reset.
* @note The function is not atomic, if you need atomicity it is suggested
* to use a semaphore or a mutex for mutual exclusion.
* @note The queue callback is invoked one time <b>for each</b> byte inserted
* into the queue.
* @note The queue callback is invoked before entering a sleep state and at
* the end of the transfer.
*
* @param[in] oqp pointer to an @p OutputQueue structure
* @param[out] bp pointer to the data buffer
@ -288,22 +301,33 @@ size_t chOQWriteTimeout(OutputQueue *oqp, const uint8_t *bp,
qnotify_t nfy = oqp->q_notify;
size_t w = 0;
do {
chSysLock();
if (chSemWaitTimeoutS(&oqp->q_sem, time) != RDY_OK) {
while (TRUE) {
if (chOQIsFull(oqp)) {
if (nfy)
nfy();
if ((chSemWaitTimeoutS(&oqp->q_sem, time) != RDY_OK)) {
chSysUnlock();
return w;
}
}
else
chSemFastWaitI(&oqp->q_sem);
*oqp->q_wrptr++ = *bp++;
if (oqp->q_wrptr >= oqp->q_top)
oqp->q_wrptr = oqp->q_buffer;
if (nfy)
nfy();
chSysUnlock(); /* Gives a preemption chance in a controlled point.*/
w++;
} while (--n > 0);
if (--n == 0) {
chSysLock();
if (nfy)
nfy();
chSysUnlock();
return w;
}
chSysLock();
}
}
#endif /* CH_USE_QUEUES */
/** @} */