content/browser/renderer_host/pepper/quota_reservation.cc

   1 // Copyright 2013 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/renderer_host/pepper/quota_reservation.h"
   6
   7 #include "base/bind.h"
   8 #include "base/callback.h"
   9 #include "content/public/browser/browser_thread.h"
  10 #include "webkit/browser/fileapi/quota/open_file_handle.h"
  11 #include "webkit/browser/fileapi/quota/quota_reservation.h"
  12 #include "webkit/common/fileapi/file_system_util.h"
  13
  14 namespace content {
  15
  16 // static
  17 scoped_refptr<QuotaReservation> QuotaReservation::Create(
  18     scoped_refptr<fileapi::FileSystemContext> file_system_context,
  19     const GURL& origin_url,
  20     fileapi::FileSystemType type) {
  21   return scoped_refptr<QuotaReservation>(new QuotaReservation(
  22       file_system_context, origin_url, type));
  23 }
  24
  25 QuotaReservation::QuotaReservation(
  26     scoped_refptr<fileapi::FileSystemContext> file_system_context,
  27     const GURL& origin_url,
  28     fileapi::FileSystemType file_system_type)
  29     : file_system_context_(file_system_context) {
  30   quota_reservation_ =
  31       file_system_context->CreateQuotaReservationOnFileTaskRunner(
  32           origin_url,
  33           file_system_type);
  34 }
  35
  36 // For unit testing only.
  37 QuotaReservation::QuotaReservation(
  38     scoped_refptr<fileapi::QuotaReservation> quota_reservation,
  39     const GURL& /* origin_url */,
  40     fileapi::FileSystemType /* file_system_type */)
  41     : quota_reservation_(quota_reservation) {
  42 }
  43
  44 QuotaReservation::~QuotaReservation() {
  45   // We should have no open files at this point.
  46   DCHECK(files_.size() == 0);
  47   for (FileMap::iterator it = files_.begin(); it != files_.end(); ++ it)
  48     delete it->second;
  49 }
  50
  51 int64_t QuotaReservation::OpenFile(int32_t id,
  52                                    const base::FilePath& file_path) {
  53   scoped_ptr<fileapi::OpenFileHandle> file_handle =
  54       quota_reservation_->GetOpenFileHandle(file_path);
  55   std::pair<FileMap::iterator, bool> insert_result =
  56       files_.insert(std::make_pair(id, file_handle.get()));
  57   if (insert_result.second) {
  58     int64_t max_written_offset = file_handle->base_file_size();
  59     ignore_result(file_handle.release());
  60     return max_written_offset;
  61   }
  62   NOTREACHED();
  63   return 0;
  64 }
  65
  66 void QuotaReservation::CloseFile(int32_t id,
  67                                  int64_t max_written_offset) {
  68   FileMap::iterator it = files_.find(id);
  69   if (it != files_.end()) {
  70     it->second->UpdateMaxWrittenOffset(max_written_offset);
  71     files_.erase(it);
  72   } else {
  73     NOTREACHED();
  74   }
  75 }
  76
  77 void QuotaReservation::ReserveQuota(
  78     int64_t amount,
  79     const OffsetMap& max_written_offsets,
  80     const ReserveQuotaCallback& callback) {
  81   for (FileMap::iterator it = files_.begin(); it != files_.end(); ++ it) {
  82     OffsetMap::const_iterator offset_it = max_written_offsets.find(it->first);
  83     if (offset_it != max_written_offsets.end())
  84       it->second->UpdateMaxWrittenOffset(offset_it->second);
  85     else
  86       NOTREACHED();
  87   }
  88
  89   quota_reservation_->RefreshReservation(
  90       amount,
  91       base::Bind(&QuotaReservation::GotReservedQuota,
  92                  this,
  93                  callback));
  94 }
  95
  96 void QuotaReservation::GotReservedQuota(
  97     const ReserveQuotaCallback& callback,
  98     base::PlatformFileError error) {
  99   OffsetMap max_written_offsets;
 100   for (FileMap::iterator it = files_.begin(); it != files_.end(); ++ it) {
 101     max_written_offsets.insert(
 102         std::make_pair(it->first, it->second->base_file_size()));
 103   }
 104
 105   if (file_system_context_) {
 106     BrowserThread::PostTask(
 107         BrowserThread::IO,
 108         FROM_HERE,
 109         base::Bind(callback,
 110                    quota_reservation_->remaining_quota(),
 111                    max_written_offsets));
 112   } else {
 113     // Unit testing code path.
 114     callback.Run(quota_reservation_->remaining_quota(), max_written_offsets);
 115   }
 116 }
 117
 118 void QuotaReservation::DeleteOnCorrectThread() const {
 119   if (file_system_context_) {
 120     file_system_context_->default_file_task_runner()->DeleteSoon(
 121         FROM_HERE,
 122         this);
 123   } else {
 124     // Unit testing code path.
 125     delete this;
 126   }
 127 }
 128
 129 }  // namespace content