1b88d9f90a
This code allows for platform-specific ways to allocate and free TransportDIBs. This is needed by the BrowserPlugin. Make them public so that they can be accessed by the BrowserPlugin BUG=none Review URL: https://chromiumcodereview.appspot.com/10826100 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@149538 0039d316-1c4b-4281-b951-d872f2087c98
78 lines
2.8 KiB
C++
78 lines
2.8 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef CONTENT_RENDERER_RENDER_PROCESS_IMPL_H_
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#define CONTENT_RENDERER_RENDER_PROCESS_IMPL_H_
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#include "base/timer.h"
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#include "content/renderer/render_process.h"
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namespace skia {
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class PlatformCanvas;
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}
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// Implementation of the RenderProcess interface for the regular browser.
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// See also MockRenderProcess which implements the active "RenderProcess" when
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// running under certain unit tests.
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class RenderProcessImpl : public RenderProcess {
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public:
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RenderProcessImpl();
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virtual ~RenderProcessImpl();
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// RenderProcess implementation.
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virtual skia::PlatformCanvas* GetDrawingCanvas(
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TransportDIB** memory,
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const gfx::Rect& rect) OVERRIDE;
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virtual void ReleaseTransportDIB(TransportDIB* memory) OVERRIDE;
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virtual bool UseInProcessPlugins() const OVERRIDE;
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virtual void AddBindings(int bindings) OVERRIDE;
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virtual int GetEnabledBindings() const OVERRIDE;
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virtual TransportDIB* CreateTransportDIB(size_t size) OVERRIDE;
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virtual void FreeTransportDIB(TransportDIB*) OVERRIDE;
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// Like UseInProcessPlugins(), but called before RenderProcess is created
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// and does not allow overriding by tests. This just checks the command line
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// each time.
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static bool InProcessPlugins();
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private:
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// Look in the shared memory cache for a suitable object to reuse.
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// result: (output) the memory found
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// size: the resulting memory will be >= this size, in bytes
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// returns: false if a suitable DIB memory could not be found
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bool GetTransportDIBFromCache(TransportDIB** result, size_t size);
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// Maybe put the given shared memory into the shared memory cache. Returns
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// true if the SharedMemory object was stored in the cache; otherwise, false
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// is returned.
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bool PutSharedMemInCache(TransportDIB* memory);
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void ClearTransportDIBCache();
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// Return the index of a free cache slot in which to install a transport DIB
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// of the given size. If all entries in the cache are larger than the given
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// size, this doesn't free any slots and returns -1.
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int FindFreeCacheSlot(size_t size);
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// A very simplistic and small cache. If an entry in this array is non-null,
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// then it points to a SharedMemory object that is available for reuse.
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TransportDIB* shared_mem_cache_[2];
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// This DelayTimer cleans up our cache 5 seconds after the last use.
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base::DelayTimer<RenderProcessImpl> shared_mem_cache_cleaner_;
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// TransportDIB sequence number
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uint32 transport_dib_next_sequence_number_;
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bool in_process_plugins_;
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// Bitwise-ORed set of extra bindings that have been enabled anywhere in this
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// process. See BindingsPolicy for details.
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int enabled_bindings_;
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DISALLOW_COPY_AND_ASSIGN(RenderProcessImpl);
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};
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#endif // CONTENT_RENDERER_RENDER_PROCESS_IMPL_H_
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