ppapi/shared_impl/callback_tracker.cc

   1 // Copyright (c) 2010 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 "ppapi/shared_impl/callback_tracker.h"
   6
   7 #include <algorithm>
   8
   9 #include "base/bind.h"
  10 #include "base/compiler_specific.h"
  11 #include "base/logging.h"
  12 #include "base/message_loop.h"
  13 #include "ppapi/c/pp_completion_callback.h"
  14 #include "ppapi/shared_impl/tracked_callback.h"
  15
  16 namespace ppapi {
  17
  18 // CallbackTracker -------------------------------------------------------------
  19
  20 CallbackTracker::CallbackTracker() {
  21 }
  22
  23 void CallbackTracker::AbortAll() {
  24   // Iterate over a copy since |Abort()| calls |Remove()| (indirectly).
  25   // TODO(viettrungluu): This obviously isn't so efficient.
  26   CallbackSetMap pending_callbacks_copy = pending_callbacks_;
  27   for (CallbackSetMap::iterator it1 = pending_callbacks_copy.begin();
  28        it1 != pending_callbacks_copy.end(); ++it1) {
  29     for (CallbackSet::iterator it2 = it1->second.begin();
  30          it2 != it1->second.end(); ++it2) {
  31       (*it2)->Abort();
  32     }
  33   }
  34 }
  35
  36 void CallbackTracker::PostAbortForResource(PP_Resource resource_id) {
  37   CHECK(resource_id != 0);
  38   CallbackSetMap::iterator it1 = pending_callbacks_.find(resource_id);
  39   if (it1 == pending_callbacks_.end())
  40     return;
  41   for (CallbackSet::iterator it2 = it1->second.begin();
  42        it2 != it1->second.end(); ++it2) {
  43     // Post the abort.
  44     (*it2)->PostAbort();
  45   }
  46 }
  47
  48 CallbackTracker::~CallbackTracker() {
  49   // All callbacks must be aborted before destruction.
  50   CHECK_EQ(0u, pending_callbacks_.size());
  51 }
  52
  53 void CallbackTracker::Add(
  54     const scoped_refptr<TrackedCallback>& tracked_callback) {
  55   PP_Resource resource_id = tracked_callback->resource_id();
  56   DCHECK(pending_callbacks_[resource_id].find(tracked_callback) ==
  57          pending_callbacks_[resource_id].end());
  58   pending_callbacks_[resource_id].insert(tracked_callback);
  59 }
  60
  61 void CallbackTracker::Remove(
  62     const scoped_refptr<TrackedCallback>& tracked_callback) {
  63   CallbackSetMap::iterator map_it =
  64       pending_callbacks_.find(tracked_callback->resource_id());
  65   DCHECK(map_it != pending_callbacks_.end());
  66   CallbackSet::iterator it = map_it->second.find(tracked_callback);
  67   DCHECK(it != map_it->second.end());
  68   map_it->second.erase(it);
  69
  70   // If there are no pending callbacks left for this ID, get rid of the entry.
  71   if (map_it->second.empty())
  72     pending_callbacks_.erase(map_it);
  73 }
  74
  75 }  // namespace ppapi