content/browser/cache_storage/cache_storage_scheduler.cc

   1 // Copyright 2015 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/browser/cache_storage/cache_storage_scheduler.h"
   6
   7 #include <string>
   8
   9 #include "base/bind.h"
  10 #include "base/location.h"
  11 #include "base/logging.h"
  12 #include "base/message_loop/message_loop_proxy.h"
  13
  14 namespace content {
  15
  16 CacheStorageScheduler::CacheStorageScheduler() : operation_running_(false) {
  17 }
  18
  19 CacheStorageScheduler::~CacheStorageScheduler() {
  20 }
  21
  22 void CacheStorageScheduler::ScheduleOperation(const base::Closure& closure) {
  23   pending_operations_.push_back(closure);
  24   RunOperationIfIdle();
  25 }
  26
  27 void CacheStorageScheduler::CompleteOperationAndRunNext() {
  28   DCHECK(operation_running_);
  29   operation_running_ = false;
  30   RunOperationIfIdle();
  31 }
  32
  33 bool CacheStorageScheduler::ScheduledOperations() const {
  34   return operation_running_ || !pending_operations_.empty();
  35 }
  36
  37 void CacheStorageScheduler::RunOperationIfIdle() {
  38   if (!operation_running_ && !pending_operations_.empty()) {
  39     operation_running_ = true;
  40     // TODO(jkarlin): Run multiple operations in parallel where allowed.
  41     base::Closure closure = pending_operations_.front();
  42     pending_operations_.pop_front();
  43     base::MessageLoopProxy::current()->PostTask(FROM_HERE, base::Bind(closure));
  44   }
  45 }
  46
  47 }  // namespace content