cc/resources/resource_pool.h

   1 // Copyright 2012 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 CC_RESOURCES_RESOURCE_POOL_H_
   6 #define CC_RESOURCES_RESOURCE_POOL_H_
   7
   8 #include <deque>
   9
  10 #include "base/memory/scoped_ptr.h"
  11 #include "base/trace_event/memory_dump_provider.h"
  12 #include "cc/base/cc_export.h"
  13 #include "cc/output/renderer.h"
  14 #include "cc/resources/resource.h"
  15 #include "cc/resources/resource_format.h"
  16
  17 namespace cc {
  18 class ScopedResource;
  19
  20 class CC_EXPORT ResourcePool : public base::trace_event::MemoryDumpProvider {
  21  public:
  22   static scoped_ptr<ResourcePool> Create(ResourceProvider* resource_provider,
  23                                          GLenum target) {
  24     return make_scoped_ptr(new ResourcePool(resource_provider, target));
  25   }
  26
  27   ~ResourcePool() override;
  28
  29   scoped_ptr<ScopedResource> AcquireResource(const gfx::Size& size,
  30                                              ResourceFormat format);
  31   scoped_ptr<ScopedResource> TryAcquireResourceWithContentId(uint64 content_id);
  32   void ReleaseResource(scoped_ptr<ScopedResource> resource,
  33                        uint64_t content_id);
  34
  35   void SetResourceUsageLimits(size_t max_memory_usage_bytes,
  36                               size_t max_unused_memory_usage_bytes,
  37                               size_t max_resource_count);
  38
  39   void ReduceResourceUsage();
  40   // This might block if |wait_if_needed| is true and one of the currently
  41   // busy resources has a read lock fence that needs to be waited upon before
  42   // it can be locked for write again.
  43   void CheckBusyResources(bool wait_if_needed);
  44
  45   size_t total_memory_usage_bytes() const { return memory_usage_bytes_; }
  46   size_t acquired_memory_usage_bytes() const {
  47     return memory_usage_bytes_ - unused_memory_usage_bytes_;
  48   }
  49   size_t total_resource_count() const { return resource_count_; }
  50   size_t acquired_resource_count() const {
  51     return resource_count_ - unused_resources_.size();
  52   }
  53   size_t busy_resource_count() const { return busy_resources_.size(); }
  54
  55   // Overridden from base::trace_event::MemoryDumpProvider:
  56   bool OnMemoryDump(const base::trace_event::MemoryDumpArgs& args,
  57                     base::trace_event::ProcessMemoryDump* pmd) override;
  58
  59  protected:
  60   ResourcePool(ResourceProvider* resource_provider, GLenum target);
  61
  62   bool ResourceUsageTooHigh();
  63
  64  private:
  65   void DidFinishUsingResource(ScopedResource* resource, uint64_t content_id);
  66   void DeleteResource(ScopedResource* resource);
  67
  68   ResourceProvider* resource_provider_;
  69   const GLenum target_;
  70   size_t max_memory_usage_bytes_;
  71   size_t max_unused_memory_usage_bytes_;
  72   size_t max_resource_count_;
  73   size_t memory_usage_bytes_;
  74   size_t unused_memory_usage_bytes_;
  75   size_t resource_count_;
  76
  77   struct PoolResource {
  78     PoolResource(ScopedResource* resource, uint64_t content_id)
  79         : resource(resource), content_id(content_id) {}
  80     void OnMemoryDump(base::trace_event::ProcessMemoryDump* pmd,
  81                       bool is_free) const;
  82
  83     ScopedResource* resource;
  84     uint64_t content_id;
  85   };
  86   typedef std::deque<PoolResource> ResourceList;
  87   ResourceList unused_resources_;
  88   ResourceList busy_resources_;
  89
  90   DISALLOW_COPY_AND_ASSIGN(ResourcePool);
  91 };
  92
  93 }  // namespace cc
  94
  95 #endif  // CC_RESOURCES_RESOURCE_POOL_H_