Reference: WebObjects 5.4.1 Reference

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LEARN ABOUT DEBIAN

resource

Resource(3I)															      Resource(3I)

NAME

       Resource - shared object

SYNOPSIS

       #include <InterViews/resource.h>

DESCRIPTION

       Resource  is  a	class  that provides a simple form of reference counting for shared objects.  Every resource has a reference count that is
       initially set to zero and must be explicitly incremented through a call to Reference.  A resource should not be deleted like other objects;
       instead, the static member function unref should be used to unreference the object.

       When  a	resource  is  unreferenced,  the  reference  count  is decremented unless it is already zero.  If the count is zero, the object is
       destroyed.

PUBLIC OPERATIONS

       Resource()
	      Create a new resource object with its reference count set to zero.

       void ref()
	      Increment the resource's reference count.

       void unref()
	      Decrement the resource's reference count, if it is positive, and delete this if the count is zero.

       static void ref(Resource*)
	      If the resource is not nil, call ref on it.  Otherwise do nothing.

       static void unref(Resource*)
	      If the resource is not nil, call unref on it.  Otherwise do nothing.

       void Reference()
	      This function is equivalent to ref and is provided solely for backward compatibility.  It will be removed in a future version.

       void Unreference()
	      This function is equivalent to unref and is provided solely for backward compatibility.  It will be removed in a future version.

FRIEND OPERATIONS

       void Unref(Resource*)
	      This function is equivalent to static unref and is provided solely for backward compatibility.  It will be removed in a future  ver-
	      sion.

BUGS

       This scheme relies on manual referencing, which is more efficient, but also more dangerous.

       When garbage collection is supported by the runtime system, resources will be unnecessary.

InterViews Reference Manual													      Resource(3I)

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