dom/plugins/PluginMessageUtils.cpp
author Benjamin Smedberg <benjamin@smedbergs.us>
Sat, 06 Mar 2010 16:03:05 -0500
changeset 39283 beed4bc507c9c6a48cbaa7f828bf3304eb97931d
parent 39265 b66ec6b72771a32154ea805b65ba8c974327ab7f
child 39720 b4d603fb501d71f5b49a46e9b0a1b9872e926001
permissions -rw-r--r--
Bug 551049 part 3: delay the delivery of NPP_URLNotify until the related stream is completely delivered and destroyed, and propagate errors from NPP_Write and NPN_DestroyStream back to NPP_URLNotify r=bent

/* -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 8; -*- */
/* vim: set sw=2 ts=8 et tw=80 : */
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#include "PluginMessageUtils.h"
#include "nsIRunnable.h"
#include "nsThreadUtils.h"

#include "PluginInstanceParent.h"
#include "PluginInstanceChild.h"
#include "PluginScriptableObjectParent.h"
#include "PluginScriptableObjectChild.h"

using mozilla::ipc::RPCChannel;

namespace {

class DeferNPObjectReleaseRunnable : public nsRunnable
{
public:
  DeferNPObjectReleaseRunnable(const NPNetscapeFuncs* f, NPObject* o)
    : mFuncs(f)
    , mObject(o)
  {
    NS_ASSERTION(o, "no release null objects");
  }

  NS_IMETHOD Run();

private:
  const NPNetscapeFuncs* mFuncs;
  NPObject* mObject;
};

NS_IMETHODIMP
DeferNPObjectReleaseRunnable::Run()
{
  mFuncs->releaseobject(mObject);
  return NS_OK;
}

} // anonymous namespace

namespace mozilla {
namespace plugins {

RPCChannel::RacyRPCPolicy
MediateRace(const RPCChannel::Message& parent,
            const RPCChannel::Message& child)
{
  // our code relies on the frame list not changing during paints
  bool isPaint = (PPluginInstance::Msg_Paint__ID == parent.type());

  return isPaint ? RPCChannel::RRPParentWins : RPCChannel::RRPChildWins;
}

PRLogModuleInfo* gPluginLog = PR_NewLogModule("IPCPlugins");

void
DeferNPObjectLastRelease(const NPNetscapeFuncs* f, NPObject* o)
{
  if (!o)
    return;

  if (o->referenceCount > 1) {
    f->releaseobject(o);
    return;
  }

  NS_DispatchToCurrentThread(new DeferNPObjectReleaseRunnable(f, o));
}

void DeferNPVariantLastRelease(const NPNetscapeFuncs* f, NPVariant* v)
{
  if (!NPVARIANT_IS_OBJECT(*v)) {
    f->releasevariantvalue(v);
    return;
  }
  DeferNPObjectLastRelease(f, v->value.objectValue);
  VOID_TO_NPVARIANT(*v);
}

} // namespace plugins
} // namespace mozilla