/usr/include/CLHEP/RefCount/ZMuseCount.h is in libclhep-dev 2.1.4.1+dfsg-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 | #ifndef ZMUSECOUNT_H
#define ZMUSECOUNT_H
// ----------------------------------------------------------------------
//
// ZMuseCount.h - utility class for use in reference-counting
//
//
// History:
// 19-Sep-1997 WEB Design stolen, and code adapted, from pp 70-73 of
// Koenig & Moo: "Ruminations on C++" (1996)
//
// ----------------------------------------------------------------------
class ZMuseCount {
public:
// --------------------------
// Constructors & destructor:
// --------------------------
ZMuseCount();
// Constructor
ZMuseCount( const ZMuseCount & u );
// Copy constructor
~ZMuseCount();
// Destructor
// -----------------------------------
// Functions useful to a handle class:
// -----------------------------------
bool only();
// Is there exactly one copy of the referent?
bool makeonly();
// Enables the handle (to a ClassType) to refer to a unique (copy of)
// the referent via the following usage:
// if ( u.makeonly() ) /* ZMuseCount u; */
// p = new ClassType( *p ); /* ClassType * p; */
// This is useful in implementing copy-on-write semantics
// (i.e., non-shared or value semantics), and would appear just before
// updating (any part of) *p in such a context.
bool reattach( const ZMuseCount & u );
// Simplifies a handle's implementation of assignment via the following
// usage:
// if ( u.reattach(h.u) ) /* Handle<ClassType> h; */
// delete p; /* p and u as above */
// p = h.p;
private:
int * p;
// *p is the reference counter itself
ZMuseCount & operator=( const ZMuseCount & );
// Forbidden operation on a ZMuseCount object
}; // ZMuseCount
//#include "CLHEP/RefCount/ZMuseCount.icc"
#endif // ZMUSECOUNT_H
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