ppapi/proxy/file_system_resource.h

   1 // Copyright (c) 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 #ifndef PPAPI_PROXY_FILE_SYSTEM_RESOURCE_H_
   6 #define PPAPI_PROXY_FILE_SYSTEM_RESOURCE_H_
   7
   8 #include <map>
   9 #include <queue>
  10 #include <string>
  11
  12 #include "base/memory/ref_counted.h"
  13 #include "ppapi/c/pp_file_info.h"
  14 #include "ppapi/c/pp_resource.h"
  15 #include "ppapi/c/private/ppb_isolated_file_system_private.h"
  16 #include "ppapi/proxy/connection.h"
  17 #include "ppapi/proxy/plugin_resource.h"
  18 #include "ppapi/proxy/ppapi_proxy_export.h"
  19 #include "ppapi/proxy/resource_message_params.h"
  20 #include "ppapi/thunk/ppb_file_system_api.h"
  21
  22 namespace ppapi {
  23
  24 class TrackedCallback;
  25
  26 namespace proxy {
  27
  28 class PPAPI_PROXY_EXPORT FileSystemResource
  29     : public PluginResource,
  30       public NON_EXPORTED_BASE(thunk::PPB_FileSystem_API) {
  31  public:
  32   // Creates a new FileSystemResource. The resource must be subsequently opened
  33   // via Open() before use.
  34   FileSystemResource(Connection connection,
  35                      PP_Instance instance,
  36                      PP_FileSystemType type);
  37   // Creates a FileSystemResource, attached to an existing pending host
  38   // resource. The |pending_renderer_id| and |pending_browser_id| must be
  39   // already-opened file systems.
  40   FileSystemResource(Connection connection,
  41                      PP_Instance instance,
  42                      int pending_renderer_id,
  43                      int pending_browser_id,
  44                      PP_FileSystemType type);
  45   ~FileSystemResource() override;
  46
  47   // Resource overrides.
  48   thunk::PPB_FileSystem_API* AsPPB_FileSystem_API() override;
  49
  50   // PPB_FileSystem_API implementation.
  51   int32_t Open(int64_t expected_size,
  52                scoped_refptr<TrackedCallback> callback) override;
  53   PP_FileSystemType GetType() override;
  54   void OpenQuotaFile(PP_Resource file_io) override;
  55   void CloseQuotaFile(PP_Resource file_io) override;
  56   typedef base::Callback<void(int64_t)> RequestQuotaCallback;
  57   int64_t RequestQuota(int64_t amount,
  58                        const RequestQuotaCallback& callback) override;
  59
  60   int32_t InitIsolatedFileSystem(const std::string& fsid,
  61                                  PP_IsolatedFileSystemType_Private type,
  62                                  const base::Callback<void(int32_t)>& callback);
  63  private:
  64   struct QuotaRequest {
  65     QuotaRequest(int64_t amount,
  66                  const RequestQuotaCallback& callback);
  67     ~QuotaRequest();
  68
  69     int64_t amount;
  70     RequestQuotaCallback callback;
  71   };
  72
  73   // Called when the host has responded to our open request.
  74   void OpenComplete(scoped_refptr<TrackedCallback> callback,
  75                     const ResourceMessageReplyParams& params);
  76
  77   // Called when the host has responded to our InitIsolatedFileSystem request.
  78   void InitIsolatedFileSystemComplete(
  79       const base::Callback<void(int32_t)>& callback,
  80       const ResourceMessageReplyParams& params);
  81
  82   void ReserveQuota(int64_t amount);
  83   typedef std::map<int32_t, int64_t> OffsetMap;
  84   void ReserveQuotaComplete(const ResourceMessageReplyParams& params,
  85                             int64_t amount,
  86                             const OffsetMap& max_written_offsets);
  87
  88   PP_FileSystemType type_;
  89   bool called_open_;
  90   uint32_t callback_count_;
  91   int32_t callback_result_;
  92
  93   std::set<PP_Resource> files_;
  94   std::queue<QuotaRequest> pending_quota_requests_;
  95   int64_t reserved_quota_;
  96   bool reserving_quota_;
  97
  98   DISALLOW_COPY_AND_ASSIGN(FileSystemResource);
  99 };
 100
 101 }  // namespace proxy
 102 }  // namespace ppapi
 103
 104 #endif  // PPAPI_PROXY_FILE_SYSTEM_RESOURCE_H_