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/*
* Copyright 2009, The Android Open Source Project
* Copyright (C) 2008 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "PluginTimer.h"
#include "RefPtr.h"
namespace WebCore {
static uint32_t gTimerID;
PluginTimer::PluginTimer(PluginTimer** list, NPP instance, bool repeat,
void (*timerFunc)(NPP npp, uint32_t timerID))
: m_list(list),
m_instance(instance),
m_timerFunc(timerFunc),
m_repeat(repeat),
m_unscheduled(false)
{
m_timerID = ++gTimerID;
m_next = *list;
if (m_next) {
m_next->m_prev = this;
}
m_prev = 0;
*list = this;
relaxAdoptionRequirement();
}
PluginTimer::~PluginTimer()
{
if (m_next) {
m_next->m_prev = m_prev;
}
if (m_prev) {
m_prev->m_next = m_next;
} else {
*m_list = m_next;
}
}
void PluginTimer::fired()
{
// ensure the timer cannot be deleted until this method completes
RefPtr<PluginTimer> protector(this);
if (!m_unscheduled)
m_timerFunc(m_instance, m_timerID);
// remove the timer if it is a one-shot timer (!m_repeat) or if is a
// repeating timer that has been unscheduled. In either case we must
// ensure that the refcount is 2 or greater since the PluginTimerList
// could have been deleted by the timerFunc and we must ensure that we
// do not double delete.
if ((!m_repeat || m_unscheduled) && refCount() > 1)
deref(); // mark the timer for deletion as it is no longer needed
}
// may return null if timerID is not found
PluginTimer* PluginTimer::Find(PluginTimer* list, uint32_t timerID)
{
PluginTimer* curr = list;
while (curr) {
if (curr->m_timerID == timerID) {
break;
}
curr = curr->m_next;
}
return curr;
}
///////////////////////////////////////////////////////////////////////////
PluginTimerList::~PluginTimerList()
{
PluginTimer* curr = m_list;
PluginTimer* next;
while (curr) {
next = curr->next();
curr->deref();
curr = next;
}
}
uint32_t PluginTimerList::schedule(NPP instance, uint32_t interval, bool repeat,
void (*proc)(NPP npp, uint32_t timerID))
{
PluginTimer* timer = new PluginTimer(&m_list, instance, repeat, proc);
double dinterval = interval * 0.001; // milliseconds to seconds
if (repeat) {
timer->startRepeating(dinterval);
} else {
timer->startOneShot(dinterval);
}
return timer->timerID();
}
void PluginTimerList::unschedule(NPP instance, uint32_t timerID)
{
// Although it looks like simply deleting the timer would work here
// (stop() will be executed by the dtor), we cannot do this, as
// the plugin can call us while we are in the fired() method,
// (when we execute the timerFunc callback). Deleting the object
// we are in would then be a rather bad move...
PluginTimer* timer = PluginTimer::Find(m_list, timerID);
if (timer)
timer->unschedule();
}
} // namespace WebCore
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