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Thread OS priority

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This commit is contained in:
Aleksandar Fabijanic
2008-04-15 23:25:19 +00:00
parent 8bc8552616
commit 32c8d371e9
5 changed files with 136 additions and 0 deletions
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55
Foundation/src/Thread_POSIX.cpp
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@@ -107,6 +107,43 @@ void ThreadImpl::setPriorityImpl(int prio)
}
void ThreadImpl::setOSPriorityImpl(int prio)
{
if (prio != _pData->osPrio)
{
if (_pData->pRunnableTarget || _pData->pCallbackTarget)
{
struct sched_param par;
par.sched_priority = prio;
if (pthread_setschedparam(_pData->thread, SCHED_OTHER, &par))
throw SystemException("cannot set thread priority");
}
_pData->prio = reverseMapPrio(prio);
_pData->osPrio = prio;
}
}
int ThreadImpl::getMinOSPriorityImpl()
{
#if defined(__VMS) || defined(__digital__)
return PRI_OTHER_MIN;
#else
return sched_get_priority_min(SCHED_OTHER);
#endif
}
int ThreadImpl::getMaxOSPriorityImpl()
{
#if defined(__VMS) || defined(__digital__)
return PRI_OTHER_MAX;
#else
return sched_get_priority_max(SCHED_OTHER);
#endif
}
void ThreadImpl::startImpl(Runnable& target)
{
if (_pData->pRunnableTarget) throw SystemException("thread already running");
@@ -306,4 +343,22 @@ int ThreadImpl::mapPrio(int prio)
}
int ThreadImpl::reverseMapPrio(int prio)
{
int pmin = getMinOSPriorityImpl();
int pmax = getMaxOSPriorityImpl();
int normal = pmin + (pmax - pmin)/2;
if (prio == pmax)
return PRIO_HIGHEST_IMPL;
if (prio > normal)
return PRIO_HIGH_IMPL;
else if (prio == normal)
return PRIO_NORMAL_IMPL;
else if (prio > pmin)
return PRIO_LOW_IMPL;
else
return PRIO_LOWEST_IMPL;
}
} // namespace Poco