a018a119bd
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@29957 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
146 lines
5.1 KiB
TeX
146 lines
5.1 KiB
TeX
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%% Name: dynlib.tex
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%% Purpose: wxDynamicLibrary documentation
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%% Author: Vadim Zeitlin
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%% Modified by:
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%% Created: 14.01.02 (extracted from dllload.tex)
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%% RCS-ID: $Id$
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%% Copyright: (c) Vadim Zeitlin
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%% License: wxWidgets license
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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\section{\class{wxDynamicLibrary}}\label{wxdynamiclibrary}
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wxDynamicLibrary is a class representing dynamically loadable library
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(Windows DLL, shared library under Unix etc.). Just create an object of
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this class to load a library and don't worry about unloading it -- it will be
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done in the objects destructor automatically.
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% deprecated now...
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%
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%\wxheading{See also}
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%
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%\helpref{wxDllLoader}{wxdllloader}
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\membersection{wxDynamicLibrary::wxDynamicLibrary}\label{wxdynamiclibrarywxdynamiclibrary}
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\func{}{wxDynamicLibrary}{\void}
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\func{}{wxDynamicLibrary}{\param{const wxString\& }{name}, \param{int }{flags = wxDL\_DEFAULT}}
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Constructor. Second form calls \helpref{Load}{wxdynamiclibraryload}.
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\membersection{wxDynamicLibrary::CanonicalizeName}\label{wxdynamiclibrarycanonicalizename}
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\func{wxString}{CanonicalizeName}{\param{const wxString\& }{name}, \param{wxDynamicLibraryCategory}{ cat = wxDL\_LIBRARY}}
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Returns the platform-specific full name for the library called \arg{name}. E.g.
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it adds a {\tt ".dll"} extension under Windows and {\tt "lib"} prefix and
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{\tt ".so"}, {\tt ".sl"} or maybe {\tt ".dylib"} extension under Unix.
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The possible values for \arg{cat} are:
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\begin{twocollist}
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\twocolitem{wxDL\_LIBRARY}{normal library}
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\twocolitem{wxDL\_MODULE}{a loadable module or plugin}
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\end{twocollist}
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\wxheading{See also}
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\helpref{CanonicalizePluginName}{wxdynamiclibrarycanonicalizepluginname}
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\membersection{wxDynamicLibrary::CanonicalizePluginName}\label{wxdynamiclibrarycanonicalizepluginname}
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\func{wxString}{CanonicalizePluginName}{\param{const wxString\& }{name}, \param{wxPluginCategory}{ cat = wxDL\_PLUGIN\_GUI}}
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This function does the same thing as
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\helpref{CanonicalizeName}{wxdynamiclibrarycanonicalizename} but for wxWidgets
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plugins. The only difference is that compiler and version information are added
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to the name to ensure that the plugin which is going to be loaded will be
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compatible with the main program.
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The possible values for \arg{cat} are:
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\begin{twocollist}
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\twocolitem{wxDL\_PLUGIN\_GUI}{plugin which uses GUI classes (default)}
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\twocolitem{wxDL\_PLUGIN\_BASE}{plugin which only uses wxBase}
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\end{twocollist}
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\membersection{wxDynamicLibrary::Detach}\label{wxdynamiclibrarydetach}
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\func{wxDllType}{Detach}{\void}
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Detaches this object from its library handle, i.e. the object will not unload
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the library any longer in its destructor but it is now the callers
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responsability to do this using \helpref{Unload}{wxdynamiclibraryunload}.
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\membersection{wxDynamicLibrary::GetSymbol}\label{wxdynamiclibrarygetsymbol}
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\constfunc{void *}{GetSymbol}{\param{const wxString\& }{name}}
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Returns pointer to symbol {\it name} in the library or NULL if the library
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contains no such symbol.
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\wxheading{See also}
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\helpref{wxDYNLIB\_FUNCTION}{wxdynlibfunction}
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\membersection{wxDynamicLibrary::HasSymbol}\label{wxdynamiclibraryhassymbol}
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\constfunc{bool}{HasSymbol}{\param{const wxString\& }{name}}
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Returns \true if the symbol with the given \arg{name} is present in the dynamic
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library, \false otherwise. Unlike \helpref{GetSymbol}{wxdynamiclibrarygetsymbol},
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this function doesn't log an error message if the symbol is not found.
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\newsince{2.5.4}
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\membersection{wxDynamicLibrary::IsLoaded}\label{wxdynamiclibraryisloaded}
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\constfunc{bool}{IsLoaded}{\void}
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Returns \true if the library was successfully loaded, \false otherwise.
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\membersection{wxDynamicLibrary::Load}\label{wxdynamiclibraryload}
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\func{bool}{Load}{\param{const wxString\& }{name}, \param{int }{flags = wxDL\_DEFAULT}}
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Loads DLL with the given \arg{name} into memory. The \arg{flags} argument can
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be a combination of the following bits:
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\begin{twocollist}
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\twocolitem{wxDL\_LAZY}{equivalent of RTLD\_LAZY under Unix, ignored elsewhere}
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\twocolitem{wxDL\_NOW}{equivalent of RTLD\_NOW under Unix, ignored elsewhere}
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\twocolitem{wxDL\_GLOBAL}{equivalent of RTLD\_GLOBAL under Unix, ignored elsewhere}
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\twocolitem{wxDL\_VERBATIM}{don't try to append the appropriate extension to
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the library name (this is done by default).}
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\end{twocollist}
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Returns \true if the library was successfully loaded, \false otherwise.
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\membersection{wxDynamicLibrary::Unload}\label{wxdynamiclibraryunload}
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\func{void}{Unload}{\void}
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\func{static void}{Unload}{\param{wxDllType }{handle}}
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Unloads the library from memory. wxDynamicLibrary object automatically calls
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this method from its destructor if it had been successfully loaded.
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The second version is only used if you need to keep the library in memory
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during a longer period of time than the scope of the wxDynamicLibrary object.
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In this case you may call \helpref{Detach}{wxdynamiclibrarydetach} and store
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the handle somewhere and call this static method later to unload it.
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