c++.stlsoft - [STLSoft] Windows Clipboard Library: class clipboard_scope: issue
- Martin Moene (46/46) Jun 11 2008 [STLSoft] Windows Clipboard Library: class clipboard_scope: issue with
- Matthew Wilson (6/52) Jun 11 2008 Am answering in a rush here, but deallocation is only required when push...
- Matt Wilson (6/70) Aug 12 2008 Hi Martin
[STLSoft] Windows Clipboard Library: class clipboard_scope: issue with
deallocating string memory
___
Hi Matthew,
I'm trying the small example program for the clipboard_scope class from
STLSoft's Windows Clipboard Library. See below.
I encounter the following issues :
1. scope.get_allocator().deallocate( cstr ); // as in doc: old name
2. scope.get_allocator().do_deallocate( cstr ); // do_deallocate: private!
3. shouldn't class clipboard_scope besides scoping the clipboard handle
also take care of deallocating the memory allocated for the string
returnd by scope.get_data( cstr ); ? (I don't think it does.)
Just to inform you, I'm not depending on it.
Cheers,
Martin.
___
#include <winstl/clipboard/clipboard_scope.hpp>
#include <algorithm> // std::copy
#include <iostream> // std::cout, std::endl
int main()
{
try
{
// set the data on the clipboard:
{
winstl::clipboard_scope scope;
scope.set_data( "Text from clipboard_scope demo." );
}
/*
* as long as no other thread/process changes the clipboard contents
* in the meanwhile, this can then be read back, as follows:
*/
{
winstl::clipboard_scope scope;
char const *cstr;
scope.get_data( cstr );
std::cout << "Clipboard data: " << cstr << std::endl;
// scope.get_allocator().do_deallocate( cstr ); // private!
}
}
catch( std::exception const& e )
{
std::cerr << "Exception: " << e.what() << std::endl;
}
}
// cl -W3 -EHsc -I%STLSOFT%/include winstl_clipboard_scope.cpp user32.lib
Jun 11 2008
"Matthew Wilson" <matthew hat.stlsoft.dot.org>
Am answering in a rush here, but deallocation is only required when pushing
onto the clipboard fails. When it succeeds, the memory
is then owned by the operating system, which will release it at the appropriate
time. This is why it uses the global allocator.
If I had written any design documents, this'd be apparent. :$
btw, am very grateful for your continuing interest and efforts on STLSoft, and
I hope in a few weeks' time to get time to be able to
lend a hand. ;-)
"Martin Moene" <moene eld.physics.LeidenUniv.nl> wrote in message
news:48501AC7.3000200 eld.physics.LeidenUniv.nl...
[STLSoft] Windows Clipboard Library: class clipboard_scope: issue with
deallocating string memory
___
Hi Matthew,
I'm trying the small example program for the clipboard_scope class from
STLSoft's Windows Clipboard Library. See below.
I encounter the following issues :
1. scope.get_allocator().deallocate( cstr ); // as in doc: old name
2. scope.get_allocator().do_deallocate( cstr ); // do_deallocate: private!
3. shouldn't class clipboard_scope besides scoping the clipboard handle
also take care of deallocating the memory allocated for the string
returnd by scope.get_data( cstr ); ? (I don't think it does.)
Just to inform you, I'm not depending on it.
Cheers,
Martin.
___
#include <winstl/clipboard/clipboard_scope.hpp>
#include <algorithm> // std::copy
#include <iostream> // std::cout, std::endl
int main()
{
try
{
// set the data on the clipboard:
{
winstl::clipboard_scope scope;
scope.set_data( "Text from clipboard_scope demo." );
}
/*
* as long as no other thread/process changes the clipboard contents
* in the meanwhile, this can then be read back, as follows:
*/
{
winstl::clipboard_scope scope;
char const *cstr;
scope.get_data( cstr );
std::cout << "Clipboard data: " << cstr << std::endl;
// scope.get_allocator().do_deallocate( cstr ); // private!
}
}
catch( std::exception const& e )
{
std::cerr << "Exception: " << e.what() << std::endl;
}
}
// cl -W3 -EHsc -I%STLSOFT%/include winstl_clipboard_scope.cpp user32.lib
Jun 11 2008
Hi Martin
I've added comments to the get_data() overloads in
winstl/clipboard/clipboard_scope.hpp that clarify the resource ownership
semantics, and also removed the erroneous line from the class documentation
markup
It'll be included in the next release
Thanks
Matt
Martin Moene Wrote:
[STLSoft] Windows Clipboard Library: class clipboard_scope: issue with
deallocating string memory
___
Hi Matthew,
I'm trying the small example program for the clipboard_scope class from
STLSoft's Windows Clipboard Library. See below.
I encounter the following issues :
1. scope.get_allocator().deallocate( cstr ); // as in doc: old name
2. scope.get_allocator().do_deallocate( cstr ); // do_deallocate: private!
3. shouldn't class clipboard_scope besides scoping the clipboard handle
also take care of deallocating the memory allocated for the string
returnd by scope.get_data( cstr ); ? (I don't think it does.)
Just to inform you, I'm not depending on it.
Cheers,
Martin.
___
#include <winstl/clipboard/clipboard_scope.hpp>
#include <algorithm> // std::copy
#include <iostream> // std::cout, std::endl
int main()
{
try
{
// set the data on the clipboard:
{
winstl::clipboard_scope scope;
scope.set_data( "Text from clipboard_scope demo." );
}
/*
* as long as no other thread/process changes the clipboard contents
* in the meanwhile, this can then be read back, as follows:
*/
{
winstl::clipboard_scope scope;
char const *cstr;
scope.get_data( cstr );
std::cout << "Clipboard data: " << cstr << std::endl;
// scope.get_allocator().do_deallocate( cstr ); // private!
}
}
catch( std::exception const& e )
{
std::cerr << "Exception: " << e.what() << std::endl;
}
}
// cl -W3 -EHsc -I%STLSOFT%/include winstl_clipboard_scope.cpp user32.lib
Aug 12 2008