95 lines
2.4 KiB
C++
95 lines
2.4 KiB
C++
/* CDRMonitor.h */
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/**
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* Copyright - See the COPYRIGHT that is included with this distribution.
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* EPICS pvDataCPP is distributed subject to a Software License Agreement found
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* in file LICENSE that is included with this distribution.
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*/
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#ifndef SHOWCONSTRUCTDESTRUCT_H
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#define SHOWCONSTRUCTDESTRUCT_H
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#include <stddef.h>
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#include <stdlib.h>
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#include <stddef.h>
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#include <string.h>
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#include <stdio.h>
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#include "noDefaultMethods.h"
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#include "lock.h"
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#include "pvType.h"
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namespace epics { namespace pvData {
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//! Used to pass around snapshots
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struct CDRCount { // default copy and assignment are ok
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size_t cons, dtys;
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long refs;
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CDRCount():cons(0),dtys(0),refs(0){}
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CDRCount& operator+=(const CDRCount& o)
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{cons+=o.cons; dtys+=o.dtys; refs+=o.refs; return *this;}
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CDRCount& operator=(size_t count) // reset counters
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{cons=count; dtys=count; refs=count; return *this;}
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};
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class CDRNode;
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//! @brief Global registrar for CDRNodes
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class CDRMonitor : private NoDefaultMethods {
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public:
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static CDRMonitor& get();
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CDRNode* addNode(CDRNode& next)
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{
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CDRNode *ret=firstNode;
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firstNode=&next;
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return ret;
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}
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CDRCount current(); //!< current global count
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CDRNode* first(){return firstNode;}
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void show(FILE*);
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private:
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// Private ctor for singleton
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CDRMonitor();
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CDRNode *firstNode;
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static CDRMonitor *theone;
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static void init(void*);
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};
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//! Counters for Construction, Destruction, and References of one class
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class CDRNode : private NoDefaultMethods {
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public:
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CDRNode(const String& name)
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:nodeName(name)
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,current()
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,guard()
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,nextNode(CDRMonitor::get().addNode(*this))
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{}
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void construct(){Lock x(&guard); current.cons++;}
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void destruct(){Lock x(&guard); current.dtys++;}
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void incRef(){Lock x(&guard); current.refs++;}
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void decRef(){Lock x(&guard); current.refs--;}
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CDRNode* next() const{return nextNode;}
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CDRCount get() const{Lock x(&guard); return current;}
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void show(FILE*);
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private:
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const String nodeName;
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CDRCount current;
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mutable Mutex guard;
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CDRNode * const nextNode;
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};
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#define PVDATA_REFCOUNT_MONITOR_DEFINE(NAME) static CDRNode NAME ## _node(#NAME)
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#define PVDATA_REFCOUNT_MONITOR_DESTRUCT(NAME) NAME ## _node.destruct()
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#define PVDATA_REFCOUNT_MONITOR_CONSTRUCT(NAME) NAME ## _node.construct()
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}}
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#endif /* SHOWCONSTRUCTDESTRUCT_H */
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