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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_RENDERER_RENDER_PROCESS_IMPL_H_
#define CONTENT_RENDERER_RENDER_PROCESS_IMPL_H_
#pragma once
#include "base/timer.h"
#include "content/renderer/render_process.h"
#include "native_client/src/shared/imc/nacl_imc.h"
namespace skia {
class PlatformCanvas;
}
// Implementation of the RenderProcess interface for the regular browser.
// See also MockRenderProcess which implements the active "RenderProcess" when
// running under certain unit tests.
class RenderProcessImpl : public RenderProcess {
public:
RenderProcessImpl();
virtual ~RenderProcessImpl();
// RenderProcess implementation.
virtual skia::PlatformCanvas* GetDrawingCanvas(
TransportDIB** memory,
const gfx::Rect& rect) OVERRIDE;
virtual void ReleaseTransportDIB(TransportDIB* memory) OVERRIDE;
virtual bool UseInProcessPlugins() const OVERRIDE;
// Like UseInProcessPlugins(), but called before RenderProcess is created
// and does not allow overriding by tests. This just checks the command line
// each time.
static bool InProcessPlugins();
private:
// Look in the shared memory cache for a suitable object to reuse.
// result: (output) the memory found
// size: the resulting memory will be >= this size, in bytes
// returns: false if a suitable DIB memory could not be found
bool GetTransportDIBFromCache(TransportDIB** result, size_t size);
// Maybe put the given shared memory into the shared memory cache. Returns
// true if the SharedMemory object was stored in the cache; otherwise, false
// is returned.
bool PutSharedMemInCache(TransportDIB* memory);
void ClearTransportDIBCache();
// Return the index of a free cache slot in which to install a transport DIB
// of the given size. If all entries in the cache are larger than the given
// size, this doesn't free any slots and returns -1.
int FindFreeCacheSlot(size_t size);
// Create a new transport DIB of, at least, the given size. Return NULL on
// error.
TransportDIB* CreateTransportDIB(size_t size);
void FreeTransportDIB(TransportDIB*);
// A very simplistic and small cache. If an entry in this array is non-null,
// then it points to a SharedMemory object that is available for reuse.
TransportDIB* shared_mem_cache_[2];
// This DelayTimer cleans up our cache 5 seconds after the last use.
base::DelayTimer<RenderProcessImpl> shared_mem_cache_cleaner_;
// TransportDIB sequence number
uint32 transport_dib_next_sequence_number_;
bool in_process_plugins_;
DISALLOW_COPY_AND_ASSIGN(RenderProcessImpl);
};
#endif // CONTENT_RENDERER_RENDER_PROCESS_IMPL_H_
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