Experimental Physics and
Industrial Control System

"J. Lewis Muir" <[email protected]> writes:

> Obviously, it seems to be unhappy with the "delete" on line 93 of
> epicsRingPointer.h, but I don't know how to fix it.  Here's a
> Microsoft reference for compiler error C2664 for Visual Studio 2013
> (not the compiler used) in case it helps:
>
My guess is that the compiler doesn't like the volatile data members in
the class.

> Any ideas?
>
The class could be perhaps implemented using a mutex for locking if the
code in epicsRingPointer class needs to be thread-safe. 

The uses of epicsRingPointerCreate, epicsRingPointerPush,
epicsRingPointerPop, etc. seem to be coupled with some locking. Perhaps
those volatile type qualifiers could be removed from epicsRingPointer
class.

In any case, page
    http://en.wikipedia.org/wiki/Volatile_%28computer_programming%29 
says that
 
 "C++11

  According to the C++11 ISO Standard, the volatile keyword is only meant
  for use for hardware access; do not use it for inter-thread
  communication. For inter-thread communication, the standard library
  provides std::atomic<T> templates."

Jani Hakala

References:

epicsRingPointer.h error C2664: 'delete' : cannot convert parameter J. Lewis Muir

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