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Reduce code size by creating common timed sleeping function.

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This commit is contained in:
David Xu 2012-03-29 02:46:43 +00:00
parent df42d19401
commit d31f470d15
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=233642
1 changed files with 60 additions and 93 deletions
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153
sys/kern/kern_umtx.c
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@ -1030,6 +1030,42 @@ tstohz(const struct timespec *tsp)
return tvtohz(&tv);
}
static int
umtxq_nanosleep(struct thread *td, int clockid, int absolute,
struct timespec *timeout, const char *mesg)
{
struct umtx_q *uq;
struct timespec ets, cts, tts;
int error;
uq = td->td_umtxq;
umtxq_unlock(&uq->uq_key);
if (!absolute) {
kern_clock_gettime(td, clockid, &ets);
timespecadd(&ets, timeout);
tts = *timeout;
} else { /* absolute time */
ets = *timeout;
tts = *timeout;
kern_clock_gettime(td, clockid, &cts);
timespecsub(&tts, &cts);
}
umtxq_lock(&uq->uq_key);
for (;;) {
error = umtxq_sleep(uq, mesg, tstohz(&tts));
if (error != ETIMEDOUT)
break;
kern_clock_gettime(td, clockid, &cts);
if (timespeccmp(&cts, &ets, >=)) {
error = ETIMEDOUT;
break;
}
tts = ets;
timespecsub(&tts, &cts);
}
return (error);
}
/*
* Fetch and compare value, sleep on the address if value is not changed.
*/
@ -1038,7 +1074,6 @@ do_wait(struct thread *td, void *addr, u_long id,
struct _umtx_time *timeout, int compat32, int is_private)
{
struct umtx_q *uq;
struct timespec ets, cts, tts;
u_long tmp;
int error = 0;
@ -1054,45 +1089,21 @@ do_wait(struct thread *td, void *addr, u_long id,
tmp = fuword(addr);
else
tmp = (unsigned int)fuword32(addr);
if (tmp != id) {
umtxq_lock(&uq->uq_key);
umtxq_remove(uq);
umtxq_unlock(&uq->uq_key);
} else if (timeout == NULL) {
umtxq_lock(&uq->uq_key);
error = umtxq_sleep(uq, "uwait", 0);
umtxq_remove(uq);
umtxq_unlock(&uq->uq_key);
} else {
kern_clock_gettime(td, timeout->_clockid, &cts);
if ((timeout->_flags & UMTX_ABSTIME) == 0) {
ets = cts;
timespecadd(&ets, &timeout->_timeout);
} else {
ets = timeout->_timeout;
}
umtxq_lock(&uq->uq_key);
for (;;) {
if (timespeccmp(&cts, &ets, >=)) {
error = ETIMEDOUT;
break;
}
tts = ets;
timespecsub(&tts, &cts);
error = umtxq_sleep(uq, "uwait", tstohz(&tts));
if (!(uq->uq_flags & UQF_UMTXQ)) {
error = 0;
break;
}
if (error != ETIMEDOUT)
break;
umtxq_unlock(&uq->uq_key);
kern_clock_gettime(td, timeout->_clockid, &cts);
umtxq_lock(&uq->uq_key);
}
umtxq_remove(uq);
umtxq_unlock(&uq->uq_key);
umtxq_lock(&uq->uq_key);
if (tmp == id) {
if (timeout == NULL)
error = umtxq_sleep(uq, "uwait", 0);
else
error = umtxq_nanosleep(td, timeout->_clockid,
((timeout->_flags & UMTX_ABSTIME) != 0),
&timeout->_timeout, "uwait");
}
if ((uq->uq_flags & UQF_UMTXQ) == 0)
error = 0;
else
umtxq_remove(uq);
umtxq_unlock(&uq->uq_key);
umtx_key_release(&uq->uq_key);
if (error == ERESTART)
error = EINTR;
@ -2340,7 +2351,6 @@ do_cv_wait(struct thread *td, struct ucond *cv, struct umutex *m,
struct timespec *timeout, u_long wflags)
{
struct umtx_q *uq;
struct timespec cts, ets, tts;
uint32_t flags;
uint32_t clockid;
int error;
@ -2382,32 +2392,12 @@ do_cv_wait(struct thread *td, struct ucond *cv, struct umutex *m,
umtxq_lock(&uq->uq_key);
if (error == 0) {
if (timeout == NULL) {
if (timeout == NULL)
error = umtxq_sleep(uq, "ucond", 0);
} else {
if ((wflags & CVWAIT_ABSTIME) == 0) {
kern_clock_gettime(td, clockid, &ets);
timespecadd(&ets, timeout);
tts = *timeout;
} else { /* absolute time */
ets = *timeout;
tts = *timeout;
kern_clock_gettime(td, clockid, &cts);
timespecsub(&tts, &cts);
}
for (;;) {
error = umtxq_sleep(uq, "ucond", tstohz(&tts));
if (error != ETIMEDOUT)
break;
kern_clock_gettime(td, clockid, &cts);
if (timespeccmp(&cts, &ets, >=)) {
error = ETIMEDOUT;
break;
}
tts = ets;
timespecsub(&tts, &cts);
}
}
else
error = umtxq_nanosleep(td, clockid,
((wflags & CVWAIT_ABSTIME) != 0),
timeout, "ucond");
}
if ((uq->uq_flags & UQF_UMTXQ) == 0)
@ -2856,7 +2846,6 @@ static int
do_sem_wait(struct thread *td, struct _usem *sem, struct _umtx_time *timeout)
{
struct umtx_q *uq;
struct timespec cts, ets, tts;
uint32_t flags, count;
int error;
@ -2881,37 +2870,15 @@ do_sem_wait(struct thread *td, struct _usem *sem, struct _umtx_time *timeout)
umtx_key_release(&uq->uq_key);
return (0);
}
umtxq_lock(&uq->uq_key);
umtxq_unbusy(&uq->uq_key);
if (timeout == NULL) {
if (timeout == NULL)
error = umtxq_sleep(uq, "usem", 0);
} else {
umtxq_unlock(&uq->uq_key);
kern_clock_gettime(td, timeout->_clockid, &cts);
if ((timeout->_flags & UMTX_ABSTIME) == 0) {
ets = cts;
timespecadd(&ets, &timeout->_timeout);
} else {
ets = timeout->_timeout;
}
umtxq_lock(&uq->uq_key);
for (;;) {
if (timespeccmp(&cts, &ets, >=)) {
error = ETIMEDOUT;
break;
}
tts = ets;
timespecsub(&tts, &cts);
error = umtxq_sleep(uq, "usem", tstohz(&tts));
if (error != ETIMEDOUT)
break;
umtxq_unlock(&uq->uq_key);
kern_clock_gettime(td, timeout->_clockid, &cts);
umtxq_lock(&uq->uq_key);
}
}
else
error = umtxq_nanosleep(td, timeout->_clockid,
((timeout->_flags & UMTX_ABSTIME) != 0),
&timeout->_timeout, "usem");
if ((uq->uq_flags & UQF_UMTXQ) == 0)
error = 0;