58433de862
git-svn-id: http://skia.googlecode.com/svn/trunk@7839 2bbb7eff-a529-9590-31e7-b0007b416f81
73 lines
1.7 KiB
C++
73 lines
1.7 KiB
C++
/*
|
|
* Copyright 2013 Google Inc.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license that can be
|
|
* found in the LICENSE file.
|
|
*/
|
|
|
|
#ifndef SkAshmemImageCache_DEFINED
|
|
#define SkAshmemImageCache_DEFINED
|
|
|
|
#include "SkImageCache.h"
|
|
#include "SkTDArray.h"
|
|
#include "SkTypes.h"
|
|
|
|
class SkAshmemImageCache : public SkImageCache {
|
|
|
|
public:
|
|
/**
|
|
* Get a pointer to the single global instance of SkAshmemImageCache.
|
|
*/
|
|
static SkAshmemImageCache* GetAshmemImageCache();
|
|
|
|
virtual void* allocAndPinCache(size_t bytes, intptr_t* ID) SK_OVERRIDE;
|
|
virtual void* pinCache(intptr_t ID) SK_OVERRIDE;
|
|
virtual void releaseCache(intptr_t ID) SK_OVERRIDE;
|
|
virtual void throwAwayCache(intptr_t ID) SK_OVERRIDE;
|
|
|
|
#ifdef SK_DEBUG
|
|
SkImageCache::CacheStatus getCacheStatus(intptr_t ID) const SK_OVERRIDE;
|
|
|
|
virtual ~SkAshmemImageCache();
|
|
#endif
|
|
|
|
private:
|
|
struct AshmemRec {
|
|
int fFD;
|
|
void* fAddr;
|
|
size_t fSize;
|
|
#ifdef SK_DEBUG
|
|
bool fPinned;
|
|
|
|
static int Compare(const AshmemRec*, const AshmemRec*);
|
|
#endif
|
|
};
|
|
|
|
/**
|
|
* Constructor is private. The correct way to get this cache is through
|
|
* GetAshmemImageCache, so that all callers can get the single global.
|
|
*/
|
|
SkAshmemImageCache();
|
|
|
|
#ifdef SK_DEBUG
|
|
// Stores a list of AshmemRecs to track deletion.
|
|
SkTDArray<AshmemRec*> fRecs;
|
|
|
|
/**
|
|
* Debug only function to add an AshmemRec to the list.
|
|
*/
|
|
void appendRec(AshmemRec*);
|
|
|
|
/**
|
|
* Return the index of AshmemRec.
|
|
*/
|
|
int findRec(const AshmemRec*) const;
|
|
#endif
|
|
|
|
/**
|
|
* Deletes AshmemRec. In debug, also removes from the list.
|
|
*/
|
|
void removeRec(AshmemRec*);
|
|
};
|
|
#endif // SkAshmemImageCache_DEFINED
|