content/ppapi_plugin/plugin_process_dispatcher.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/ppapi_plugin/plugin_process_dispatcher.h"
   6
   7 #include "base/bind.h"
   8 #include "base/bind_helpers.h"
   9 #include "content/child/child_process.h"
  10
  11 namespace content {
  12 namespace {
  13
  14 // How long we wait before releasing the plugin process.
  15 const int kPluginReleaseTimeSeconds = 30;
  16
  17 }  // namespace
  18
  19 PluginProcessDispatcher::PluginProcessDispatcher(
  20     PP_GetInterface_Func get_interface,
  21     const ppapi::PpapiPermissions& permissions,
  22     bool incognito)
  23     : ppapi::proxy::PluginDispatcher(get_interface,
  24                                      permissions,
  25                                      incognito) {
  26   ChildProcess::current()->AddRefProcess();
  27 }
  28
  29 PluginProcessDispatcher::~PluginProcessDispatcher() {
  30   // Don't free the process right away. This timer allows the child process
  31   // to be re-used if the user rapidly goes to a new page that requires this
  32   // plugin. This is the case for common plugins where they may be used on a
  33   // source and destination page of a navigation. We don't want to tear down
  34   // and re-start processes each time in these cases.
  35   base::MessageLoop::current()->PostDelayedTask(
  36       FROM_HERE,
  37       base::Bind(&ChildProcess::ReleaseProcess,
  38                  base::Unretained(ChildProcess::current())),
  39       base::TimeDelta::FromSeconds(kPluginReleaseTimeSeconds));
  40 }
  41
  42 }  // namespace content