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epicsAutoMutex has a new name, fixed free lists, and allow timer to be deleted during expire

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This commit is contained in:
Jeff Hill
2002-03-21 22:45:32 +00:00
parent e66da4714b
commit fec6ba2dbf
6 changed files with 220 additions and 196 deletions
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158
src/libCom/timer/timerQueue.cpp
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@@ -29,6 +29,7 @@
*/
#define epicsExportSharedSymbols
#include "epicsGuard.h"
#include "timerPrivate.h"
epicsTimerQueue::~epicsTimerQueue () {}
@@ -50,98 +51,104 @@ timerQueue::~timerQueue ()
double timerQueue::process ( const epicsTime & currentTime )
{
{
epicsAutoMutex locker ( this->mutex );
epicsGuard < epicsMutex > guard ( this->mutex );
if ( this->pExpireTmr ) {
// if some other thread is processing the queue
// (or if this is a recursive call)
timer *pTmr = this->timerList.first ();
if ( pTmr ) {
double delay = pTmr->exp - currentTime;
if ( delay < 0.0 ) {
delay = 0.0;
}
return delay;
}
else {
return DBL_MAX;
}
}
//
// Tag current epired tmr so that we can detect if call back
// is in progress when canceling the timer.
//
this->pExpireTmr = this->timerList.first ();
if ( this->pExpireTmr ) {
if ( currentTime >= this->pExpireTmr->exp ) {
this->timerList.remove ( *this->pExpireTmr );
this->pExpireTmr->curState = timer::stateLimbo;
this->processThread = epicsThreadGetIdSelf ();
# ifdef DEBUG
this->pExpireTmr->show ( 0u );
# endif
}
else {
double delay = this->pExpireTmr->exp - currentTime;
this->pExpireTmr = 0;
debugPrintf ( ( "no activity process %f to next\n", delay ) );
return delay;
if ( this->pExpireTmr ) {
// if some other thread is processing the queue
// (or if this is a recursive call)
timer *pTmr = this->timerList.first ();
if ( pTmr ) {
double delay = pTmr->exp - currentTime;
if ( delay < 0.0 ) {
delay = 0.0;
}
return delay;
}
else {
return DBL_MAX;
}
}
//
// Tag current epired tmr so that we can detect if call back
// is in progress when canceling the timer.
//
if ( this->timerList.first () ) {
if ( currentTime >= this->timerList.first ()->exp ) {
this->pExpireTmr = this->timerList.first ();
this->timerList.remove ( *this->pExpireTmr );
this->pExpireTmr->curState = timer::stateActive;
this->processThread = epicsThreadGetIdSelf ();
# ifdef DEBUG
this->pExpireTmr->show ( 0u );
# endif
}
else {
double delay = this->timerList.first ()->exp - currentTime;
debugPrintf ( ( "no activity process %f to next\n", delay ) );
return delay;
}
}
else {
return DBL_MAX;
}
# ifdef DEBUG
unsigned N = 0u;
# endif
while ( true ) {
debugPrintf ( ( "%5u expired \"%s\" with error %f sec\n",
N++, typeid ( this->pExpireTmr->notify ).name (),
currentTime - this->pExpireTmr->exp ) );
epicsTimerNotify *pTmpNotify = this->pExpireTmr->pNotify;
this->pExpireTmr->pNotify = 0;
epicsTimerNotify::expireStatus expStat ( epicsTimerNotify::noRestart );
epicsTimerNotify::expireStatus expStat =
this->pExpireTmr->pNotify->expire ( currentTime );
{
epicsGuardRelease < epicsMutex > unguard ( guard );
epicsAutoMutex locker ( this->mutex );
debugPrintf ( ( "%5u expired \"%s\" with error %f sec\n",
N++, typeid ( this->pExpireTmr->notify ).name (),
currentTime - this->pExpireTmr->exp ) );
//
// only restart if they didnt cancel() the timer
// while the call back was running
//
if ( this->cancelPending ) {
// cancel() waits for this
this->cancelPending = false;
this->cancelBlockingEvent.signal ();
this->pExpireTmr->pNotify = 0;
}
// restart as nec
else if ( expStat.restart() ) {
this->pExpireTmr->privateStart (
*this->pExpireTmr->pNotify,
currentTime + expStat.expirationDelay() );
}
else {
this->pExpireTmr->pNotify = 0;
expStat = pTmpNotify->expire ( currentTime );
}
this->pExpireTmr = this->timerList.first ();
if ( this->pExpireTmr ) {
if ( currentTime >= this->pExpireTmr->exp ) {
this->timerList.remove ( *this->pExpireTmr );
{
//
// only restart if they didnt cancel() the timer
// while the call back was running
//
if ( this->cancelPending ) {
// 1) if another thread is canceling cancel() waits for this
// 2) if this thread is canceling in the timer callback then
// dont touch timer or notify here because the cancel might
// have occurred because they destroyed the time rin the
// callback
this->cancelPending = false;
this->cancelBlockingEvent.signal ();
}
// restart as nec
else {
this->pExpireTmr->curState = timer::stateLimbo;
if ( expStat.restart() ) {
this->pExpireTmr->privateStart (
*pTmpNotify, currentTime + expStat.expirationDelay() );
}
}
this->pExpireTmr = 0;
}
if ( this->timerList.first () ) {
if ( currentTime >= this->timerList.first ()->exp ) {
this->pExpireTmr = this->timerList.first ();
this->timerList.remove ( *this->pExpireTmr );
this->pExpireTmr->curState = timer::stateActive;
# ifdef DEBUG
this->pExpireTmr->show ( 0u );
# endif
}
else {
double delay = this->pExpireTmr->exp - currentTime;
this->pExpireTmr = 0;
double delay = this->timerList.first ()->exp - currentTime;
this->processThread = 0;
return delay;
}
@@ -156,17 +163,18 @@ double timerQueue::process ( const epicsTime & currentTime )
epicsTimer & timerQueue::createTimer ()
{
epicsAutoMutex autoLock ( this->mutex );
void *pBuf = this->timerFreeList.allocate ( sizeof (timer) );
if ( ! pBuf ) {
throw std::bad_alloc();
}
return * new ( pBuf ) timer ( *this );
return * new timer ( * this );
}
epicsTimerForC & timerQueue::createTimerForC ( epicsTimerCallback pCallback, void *pArg )
{
return * new epicsTimerForC ( *this, pCallback, pArg );
}
void timerQueue::show ( unsigned level ) const
{
epicsAutoMutex locker ( this->mutex );
epicsGuard < epicsMutex > locker ( this->mutex );
printf ( "epicsTimerQueue with %u items pending\n", this->timerList.count () );
if ( level >= 1u ) {
tsDLIterConstBD < timer > iter = this->timerList.firstIter ();