Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2             : /* vim:set ts=2 sw=2 sts=2 et cindent: */
       3             : /* This Source Code Form is subject to the terms of the Mozilla Public
       4             :  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
       5             :  * You can obtain one at http://mozilla.org/MPL/2.0/. */
       6             : 
       7             : #if !defined(MediaSystemResourceService_h_)
       8             : #define MediaSystemResourceService_h_
       9             : 
      10             : #include <deque>
      11             : 
      12             : #include "MediaSystemResourceTypes.h"
      13             : #include "mozilla/StaticPtr.h"
      14             : #include "nsClassHashtable.h"
      15             : 
      16             : namespace mozilla {
      17             : 
      18             : namespace media {
      19             : class MediaSystemResourceManagerParent;
      20             : } // namespace media
      21             : 
      22             : /**
      23             :  * Manage media system resource allocation requests within system.
      24             :  */
      25             : class MediaSystemResourceService
      26             : {
      27             : public:
      28           0 :   NS_INLINE_DECL_THREADSAFE_REFCOUNTING(MediaSystemResourceService)
      29             : 
      30             :   static MediaSystemResourceService* Get();
      31             :   static void Init();
      32             :   static void Shutdown();
      33             : 
      34             :   void Acquire(media::MediaSystemResourceManagerParent* aParent,
      35             :                uint32_t aId,
      36             :                MediaSystemResourceType aResourceType,
      37             :                bool aWillWait);
      38             : 
      39             :   void ReleaseResource(media::MediaSystemResourceManagerParent* aParent,
      40             :                        uint32_t aId,
      41             :                        MediaSystemResourceType aResourceType);
      42             : 
      43             :   void ReleaseResource(media::MediaSystemResourceManagerParent* aParent);
      44             : 
      45             : private:
      46             :   MediaSystemResourceService();
      47             :   ~MediaSystemResourceService();
      48             : 
      49             :   struct MediaSystemResourceRequest {
      50             :     MediaSystemResourceRequest()
      51             :       : mParent(nullptr), mId(-1) {}
      52           0 :     MediaSystemResourceRequest(media::MediaSystemResourceManagerParent* aParent, uint32_t aId)
      53           0 :       : mParent(aParent), mId(aId) {}
      54             :     media::MediaSystemResourceManagerParent* mParent;
      55             :     uint32_t mId;
      56             :   };
      57             : 
      58           0 :   struct MediaSystemResource {
      59             :     MediaSystemResource()
      60             :       : mResourceCount(0) {}
      61             :     explicit MediaSystemResource(uint32_t aResourceCount)
      62             :       : mResourceCount(aResourceCount) {}
      63             : 
      64             :     std::deque<MediaSystemResourceRequest> mWaitingRequests;
      65             :     std::deque<MediaSystemResourceRequest> mAcquiredRequests;
      66             :     uint32_t mResourceCount;
      67             :   };
      68             : 
      69             :   void Destroy();
      70             : 
      71             :   void RemoveRequest(media::MediaSystemResourceManagerParent* aParent,
      72             :                      uint32_t aId,
      73             :                      MediaSystemResourceType aResourceType);
      74             : 
      75             :   void RemoveRequests(media::MediaSystemResourceManagerParent* aParent,
      76             :                       MediaSystemResourceType aResourceType);
      77             : 
      78             :   void UpdateRequests(MediaSystemResourceType aResourceType);
      79             : 
      80             :   bool mDestroyed;
      81             : 
      82             :   nsClassHashtable<nsUint32HashKey, MediaSystemResource> mResources;
      83             : 
      84             :   static StaticRefPtr<MediaSystemResourceService> sSingleton;
      85             : };
      86             : 
      87             : } // namespace mozilla
      88             : 
      89             : #endif