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/*****************************************************************************/
// Copyright 2006-2008 Adobe Systems Incorporated
// All Rights Reserved.
//
// NOTICE: Adobe permits you to use, modify, and distribute this file in
// accordance with the terms of the Adobe license agreement accompanying it.
/*****************************************************************************/
/* $Id: //mondo/dng_sdk_1_4/dng_sdk/source/dng_abort_sniffer.cpp#1 $ */
/* $DateTime: 2012/05/30 13:28:51 $ */
/* $Change: 832332 $ */
/* $Author: tknoll $ */
/*****************************************************************************/
#include "dng_abort_sniffer.h"
#include "dng_mutex.h"
/*****************************************************************************/
#if qDNGThreadSafe
/*****************************************************************************/
class dng_priority_manager
{
private:
dng_mutex fMutex;
dng_condition fCondition;
uint32 fCounter [dng_priority_count];
public:
dng_priority_manager ();
void Increment (dng_priority priority);
void Decrement (dng_priority priority);
void Wait (dng_priority priority);
private:
dng_priority MinPriority ()
{
// Assumes mutex is locked.
for (uint32 level = dng_priority_maximum;
level > dng_priority_minimum;
level--)
{
if (fCounter [level])
{
return (dng_priority) level;
}
}
return dng_priority_minimum;
}
};
/*****************************************************************************/
dng_priority_manager::dng_priority_manager ()
: fMutex ("dng_priority_manager::fMutex")
, fCondition ()
{
for (uint32 level = dng_priority_minimum;
level <= dng_priority_maximum;
level++)
{
fCounter [level] = 0;
}
}
/*****************************************************************************/
void dng_priority_manager::Increment (dng_priority priority)
{
dng_lock_mutex lock (&fMutex);
fCounter [priority] += 1;
}
/*****************************************************************************/
void dng_priority_manager::Decrement (dng_priority priority)
{
dng_lock_mutex lock (&fMutex);
dng_priority oldMin = MinPriority ();
fCounter [priority] -= 1;
dng_priority newMin = MinPriority ();
if (newMin < oldMin)
{
fCondition.Broadcast ();
}
}
/*****************************************************************************/
void dng_priority_manager::Wait (dng_priority priority)
{
if (priority < dng_priority_maximum)
{
dng_lock_mutex lock (&fMutex);
while (priority < MinPriority ())
{
fCondition.Wait (fMutex);
}
}
}
/*****************************************************************************/
static dng_priority_manager gPriorityManager;
/*****************************************************************************/
#endif
/*****************************************************************************/
dng_set_minimum_priority::dng_set_minimum_priority (dng_priority priority)
: fPriority (priority)
{
#if qDNGThreadSafe
gPriorityManager.Increment (fPriority);
#endif
}
/*****************************************************************************/
dng_set_minimum_priority::~dng_set_minimum_priority ()
{
#if qDNGThreadSafe
gPriorityManager.Decrement (fPriority);
#endif
}
/*****************************************************************************/
dng_abort_sniffer::dng_abort_sniffer ()
: fPriority (dng_priority_maximum)
{
}
/*****************************************************************************/
dng_abort_sniffer::~dng_abort_sniffer ()
{
}
/*****************************************************************************/
void dng_abort_sniffer::SniffForAbort (dng_abort_sniffer *sniffer)
{
if (sniffer)
{
#if qDNGThreadSafe
gPriorityManager.Wait (sniffer->Priority ());
#endif
sniffer->Sniff ();
}
}
/*****************************************************************************/
void dng_abort_sniffer::StartTask (const char * /* name */,
real64 /* fract */)
{
}
/*****************************************************************************/
void dng_abort_sniffer::EndTask ()
{
}
/*****************************************************************************/
void dng_abort_sniffer::UpdateProgress (real64 /* fract */)
{
}
/*****************************************************************************/
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