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/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkInstCnt_DEFINED
#define SkInstCnt_DEFINED
/*
* The instance counting system consists of three macros that create the
* instance counting machinery. A class is added to the system by adding:
* SK_DECLARE_INST_COUNT at the top of its declaration for derived classes
* SK_DECLARE_INST_COUNT_ROOT at the top of its declaration for a root class
* SK_DEFINE_INST_COUNT at the top of its .cpp file (for both kinds).
* At the end of an application a call to all the "root" objects'
* CheckInstanceCount methods should be made
*/
#if defined SK_DEBUG && !defined SK_ENABLE_INST_COUNT
#define SK_ENABLE_INST_COUNT
#endif
#ifdef SK_ENABLE_INST_COUNT
#include <stdlib.h>
#include "SkTArray.h"
#include "SkThread_platform.h"
extern bool gPrintInstCount;
// The non-root classes just register themselves with their parent
#define SK_DECLARE_INST_COUNT(className) \
SK_DECLARE_INST_COUNT_INTERNAL(className, \
INHERITED::AddInstChild(CheckInstanceCount);,\
/**/)
#define SK_DECLARE_INST_COUNT_TEMPLATE(className) \
SK_DECLARE_INST_COUNT_INTERNAL(className, \
INHERITED::AddInstChild(CheckInstanceCount);, \
typename)
// The root classes registers a function to print out the memory stats when
// the app ends
#define SK_DECLARE_INST_COUNT_ROOT(className) \
SK_DECLARE_INST_COUNT_INTERNAL(className, atexit(exitPrint);, /**/)
#define SK_DECLARE_INST_COUNT_INTERNAL(className, initStep, templateType) \
class SkInstanceCountHelper { \
public: \
typedef int (*PFCheckInstCnt)(int level, bool cleanUp); \
SkInstanceCountHelper() { \
if (!gInited) { \
initStep \
gChildren = new SkTArray<PFCheckInstCnt>; \
gInited = true; \
} \
sk_atomic_inc(&gInstanceCount); \
} \
\
SkInstanceCountHelper(const SkInstanceCountHelper& other) { \
sk_atomic_inc(&gInstanceCount); \
} \
\
~SkInstanceCountHelper() { \
sk_atomic_dec(&gInstanceCount); \
} \
\
static int32_t gInstanceCount; \
static bool gInited; \
static SkTArray<PFCheckInstCnt>* gChildren; \
} fInstanceCountHelper; \
\
static int32_t GetInstanceCount() { \
return SkInstanceCountHelper::gInstanceCount; \
} \
\
static void exitPrint() { \
CheckInstanceCount(0, true); \
} \
\
static int CheckInstanceCount(int level = 0, bool cleanUp = false) { \
if (gPrintInstCount && 0 != SkInstanceCountHelper::gInstanceCount) {\
SkDebugf("%*c Leaked %s: %d\n", \
4*level, ' ', #className, \
SkInstanceCountHelper::gInstanceCount); \
} \
if (NULL == SkInstanceCountHelper::gChildren) { \
return SkInstanceCountHelper::gInstanceCount; \
} \
int childCount = SkInstanceCountHelper::gChildren->count(); \
int count = SkInstanceCountHelper::gInstanceCount; \
for (int i = 0; i < childCount; ++i) { \
count -= (*(*SkInstanceCountHelper::gChildren)[i])(level+1, cleanUp); \
} \
SkASSERT(count >= 0); \
if (gPrintInstCount && childCount > 0 && count > 0) { \
SkDebugf("%*c Leaked ???: %d\n", 4*(level + 1), ' ', count); \
} \
if (cleanUp) { \
delete SkInstanceCountHelper::gChildren; \
SkInstanceCountHelper::gChildren = NULL; \
} \
return SkInstanceCountHelper::gInstanceCount; \
} \
\
static void AddInstChild(templateType SkInstanceCountHelper::PFCheckInstCnt \
childCheckInstCnt) { \
if (CheckInstanceCount != childCheckInstCnt && \
NULL != SkInstanceCountHelper::gChildren) { \
SkInstanceCountHelper::gChildren->push_back(childCheckInstCnt); \
} \
}
#define SK_DEFINE_INST_COUNT(className) \
int32_t className::SkInstanceCountHelper::gInstanceCount = 0; \
bool className::SkInstanceCountHelper::gInited = false; \
SkTArray<className::SkInstanceCountHelper::PFCheckInstCnt>* \
className::SkInstanceCountHelper::gChildren = NULL;
#define SK_DEFINE_INST_COUNT_TEMPLATE(templateInfo, className) \
templateInfo int32_t className::SkInstanceCountHelper::gInstanceCount = 0;\
templateInfo bool className::SkInstanceCountHelper::gInited = false; \
templateInfo \
SkTArray<typename className::SkInstanceCountHelper::PFCheckInstCnt>*\
className::SkInstanceCountHelper::gChildren = NULL;
#else
#define SK_DECLARE_INST_COUNT(className)
#define SK_DECLARE_INST_COUNT_TEMPLATE(className)
#define SK_DECLARE_INST_COUNT_ROOT(className)
#define SK_DEFINE_INST_COUNT(className)
#define SK_DEFINE_INST_COUNT_TEMPLATE(templateInfo, className)
#endif
#endif // SkInstCnt_DEFINED
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