src/common/dynlib.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        dynlib.cpp
// Purpose:     Dynamic library management
// Author:      Guilhem Lavaux
// Modified by:
// Created:     20/07/98
// RCS-ID:      $Id$
// Copyright:   (c) Guilhem Lavaux
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

// ============================================================================
// declarations
// ============================================================================

// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------

#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#   pragma implementation "dynlib.h"
#endif

#include  "wx/wxprec.h"

#ifdef __BORLANDC__
  #pragma hdrstop
#endif

#if wxUSE_DYNLIB_CLASS

#if defined(__WINDOWS__)
    #include "wx/msw/private.h"
#endif

#include "wx/dynlib.h"
#include "wx/filefn.h"
#include "wx/intl.h"
#include "wx/log.h"
#include "wx/utils.h"
#include "wx/filename.h"        // for SplitPath()
#include "wx/app.h"
#include "wx/apptrait.h"

#if defined(__WXMAC__)
    #include "wx/mac/private.h"
#endif


// ============================================================================
// implementation
// ============================================================================

#if defined(__DARWIN__)
// ---------------------------------------------------------------------------
// For Darwin/Mac OS X
//   supply the sun style dlopen functions in terms of Darwin NS*
// ---------------------------------------------------------------------------

/* Porting notes:
 *   The dlopen port is a port from dl_next.xs by Anno Siegel.
 *   dl_next.xs is itself a port from dl_dlopen.xs by Paul Marquess.
 *   The method used here is just to supply the sun style dlopen etc.
 *   functions in terms of Darwin NS*.
 */

#include <stdio.h>
#include <mach-o/dyld.h>

static char dl_last_error[1024];

static
void TranslateError(const char *path, int number)
{
    unsigned int index;
    static char *OFIErrorStrings[] =
    {
	"%s(%d): Object Image Load Failure\n",
	"%s(%d): Object Image Load Success\n",
	"%s(%d): Not an recognisable object file\n",
	"%s(%d): No valid architecture\n",
	"%s(%d): Object image has an invalid format\n",
	"%s(%d): Invalid access (permissions?)\n",
	"%s(%d): Unknown error code from NSCreateObjectFileImageFromFile\n",
    };
#define NUM_OFI_ERRORS (sizeof(OFIErrorStrings) / sizeof(OFIErrorStrings[0]))

    index = number;
    if (index > NUM_OFI_ERRORS - 1) {
        index = NUM_OFI_ERRORS - 1;
    }
    sprintf(dl_last_error, OFIErrorStrings[index], path, number);
}

const char *dlerror()
{
    return dl_last_error;
}

void *dlopen(const char *path, int WXUNUSED(mode) /* mode is ignored */)
{
    int dyld_result;
    NSObjectFileImage ofile;
    NSModule handle = NULL;

    dyld_result = NSCreateObjectFileImageFromFile(path, &ofile);
    if (dyld_result != NSObjectFileImageSuccess)
    {
	TranslateError(path, dyld_result);
    }
    else
    {
	// NSLinkModule will cause the run to abort on any link error's
	// not very friendly but the error recovery functionality is limited.
	handle = NSLinkModule(ofile, path, NSLINKMODULE_OPTION_BINDNOW);
    }

    return handle;
}

int dlclose(void *handle)
{
    NSUnLinkModule( handle, NSUNLINKMODULE_OPTION_NONE);
    return 0;
}

void *dlsym(void *handle, const char *symbol)
{
    void *addr;

    NSSymbol nsSymbol = NSLookupSymbolInModule( handle , symbol ) ;

    if ( nsSymbol)
    {
	    addr = NSAddressOfSymbol(nsSymbol);
    }
    else
    {
	    addr = NULL;
    }
    return addr;
}

#endif // defined(__DARWIN__)


// ---------------------------------------------------------------------------
// wxDynamicLibrary
// ---------------------------------------------------------------------------

//FIXME:  This class isn't really common at all, it should be moved into
//        platform dependent files.

#if defined(__WINDOWS__) || defined(__WXPM__) || defined(__EMX__)
    const wxChar *wxDynamicLibrary::ms_dllext = _T(".dll");
#elif defined(__UNIX__)
    #if defined(__HPUX__)
        const wxChar *wxDynamicLibrary::ms_dllext = _T(".sl");
    #else
        const wxChar *wxDynamicLibrary::ms_dllext = _T(".so");
    #endif
#endif

wxDllType wxDynamicLibrary::GetProgramHandle()
{
#if defined( HAVE_DLOPEN ) && !defined(__EMX__)
   return dlopen(0, RTLD_LAZY);
#elif defined (HAVE_SHL_LOAD)
   return PROG_HANDLE;
#else
   wxFAIL_MSG( wxT("This method is not implemented under Windows or OS/2"));
   return 0;
#endif
}

bool wxDynamicLibrary::Load(wxString libname, int flags)
{
    wxASSERT_MSG(m_handle == 0, _T("Library already loaded."));

    // add the proper extension for the DLL ourselves unless told not to
    if ( !(flags & wxDL_VERBATIM) )
    {
        // and also check that the libname doesn't already have it
        wxString ext;
        wxFileName::SplitPath(libname, NULL, NULL, &ext);
        if ( ext.empty() )
        {
            libname += GetDllExt();
        }
    }

    // different ways to load a shared library
    //
    // FIXME: should go to the platform-specific files!
#if defined(__WXMAC__) && !defined(__DARWIN__)
    FSSpec      myFSSpec;
    Ptr         myMainAddr;
    Str255      myErrName;

    wxMacFilename2FSSpec( libname , &myFSSpec );

    if( GetDiskFragment( &myFSSpec,
                         0,
                         kCFragGoesToEOF,
                         "\p",
                         kPrivateCFragCopy,
                         &m_handle,
                         &myMainAddr,
                         myErrName ) != noErr )
    {
        p2cstr( myErrName );
        wxLogSysError( _("Failed to load shared library '%s' Error '%s'"),
                       libname.c_str(),
                       (char*)myErrName );
        m_handle = 0;
    }

#elif defined(__WXPM__) || defined(__EMX__)
    char    err[256] = "";
    DosLoadModule(err, sizeof(err), libname.c_str(), &m_handle);

#elif defined(HAVE_DLOPEN) || defined(__DARWIN__)

#if defined(__VMS) || defined(__DARWIN__)
    m_handle = dlopen(libname.c_str(), 0);  // The second parameter is ignored
#else // !__VMS  && !__DARWIN__
    int rtldFlags = 0;

    if ( flags & wxDL_LAZY )
    {
        wxASSERT_MSG( (flags & wxDL_NOW) == 0,
                      _T("wxDL_LAZY and wxDL_NOW are mutually exclusive.") );
#ifdef RTLD_LAZY
        rtldFlags |= RTLD_LAZY;
#else
        wxLogDebug(_T("wxDL_LAZY is not supported on this platform"));
#endif
    }
    else if ( flags & wxDL_NOW )
    {
#ifdef RTLD_NOW
        rtldFlags |= RTLD_NOW;
#else
        wxLogDebug(_T("wxDL_NOW is not supported on this platform"));
#endif
    }

    if ( flags & wxDL_GLOBAL )
    {
#ifdef RTLD_GLOBAL
        rtldFlags |= RTLD_GLOBAL;
#else
        wxLogDebug(_T("RTLD_GLOBAL is not supported on this platform."));
#endif
    }

    m_handle = dlopen(libname.fn_str(), rtldFlags);
#endif  // __VMS || __DARWIN__ ?

#elif defined(HAVE_SHL_LOAD)
    int shlFlags = 0;

    if( flags & wxDL_LAZY )
    {
        wxASSERT_MSG( (flags & wxDL_NOW) == 0,
                      _T("wxDL_LAZY and wxDL_NOW are mutually exclusive.") );
        shlFlags |= BIND_DEFERRED;
    }
    else if( flags & wxDL_NOW )
    {
        shlFlags |= BIND_IMMEDIATE;
    }
    m_handle = shl_load(libname.fn_str(), BIND_DEFERRED, 0);

#elif defined(__WINDOWS__)
    m_handle = ::LoadLibrary(libname.c_str());
#else
    #error  "runtime shared lib support not implemented on this platform"
#endif

    if ( m_handle == 0 )
    {
        wxString msg(_("Failed to load shared library '%s'"));
#if defined(HAVE_DLERROR) && !defined(__EMX__)

#if wxUSE_UNICODE
        wxWCharBuffer buffer = wxConvLocal.cMB2WC( dlerror() );
        const wxChar *err = buffer;
#else
        const wxChar *err = dlerror();
#endif

        if( err )
            wxLogError( msg, err );
#else
        wxLogSysError( msg, libname.c_str() );
#endif
    }

    return IsLoaded();
}

/* static */
void wxDynamicLibrary::Unload(wxDllType handle)
{
#if defined(__WXPM__) || defined(__EMX__)
    DosFreeModule( handle );
#elif defined(HAVE_DLOPEN) || defined(__DARWIN__)
    dlclose( handle );
#elif defined(HAVE_SHL_LOAD)
    shl_unload( handle );
#elif defined(__WINDOWS__)
    ::FreeLibrary( handle );
#elif defined(__WXMAC__) && !defined(__DARWIN__)
    CloseConnection( (CFragConnectionID*) &handle );
#else
    #error  "runtime shared lib support not implemented"
#endif
}

void *wxDynamicLibrary::GetSymbol(const wxString &name, bool *success) const
{
    wxCHECK_MSG( IsLoaded(), NULL,
                 _T("Can't load symbol from unloaded library") );

    bool     failed = FALSE;
    void    *symbol = 0;

#if defined(__WXMAC__) && !defined(__DARWIN__)
    Ptr                 symAddress;
    CFragSymbolClass    symClass;
    Str255              symName;
#if TARGET_CARBON
    c2pstrcpy( (StringPtr) symName, name );
#else
    strcpy( (char *)symName, name );
    c2pstr( (char *)symName );
#endif
    if( FindSymbol( dllHandle, symName, &symAddress, &symClass ) == noErr )
        symbol = (void *)symAddress;

#elif defined(__WXPM__) || defined(__EMX__)
    DosQueryProcAddr( m_handle, 1L, name.c_str(), (PFN*)symbol );

#elif defined(HAVE_DLOPEN) || defined(__DARWIN__)
    symbol = dlsym( m_handle, name.fn_str() );

#elif defined(HAVE_SHL_LOAD)
    // use local variable since shl_findsym modifies the handle argument
    // to indicate where the symbol was found (GD)
    wxDllType the_handle = m_handle;
    if( shl_findsym( &the_handle, name.fn_str(), TYPE_UNDEFINED, &symbol ) != 0 )
        symbol = 0;

#elif defined(__WINDOWS__)
    symbol = (void*) ::GetProcAddress( m_handle, name.mb_str() );

#else
#error  "runtime shared lib support not implemented"
#endif

    if ( !symbol )
    {
#if defined(HAVE_DLERROR) && !defined(__EMX__)

#if wxUSE_UNICODE
        wxWCharBuffer buffer = wxConvLocal.cMB2WC( dlerror() );
        const wxChar *err = buffer;
#else
        const wxChar *err = dlerror();
#endif

        if( err )
        {
            wxLogError(wxT("%s"), err);
        }
#else
        failed = TRUE;
        wxLogSysError(_("Couldn't find symbol '%s' in a dynamic library"),
                      name.c_str());
#endif
    }
    if( success )
        *success = !failed;

    return symbol;
}


/*static*/
wxString
wxDynamicLibrary::CanonicalizeName(const wxString& name,
                                   wxDynamicLibraryCategory
#ifdef __UNIX__
                                        cat
#else // !__UNIX__
                                        WXUNUSED(cat)
#endif // __UNIX__/!__UNIX__
                                   )
{
    wxString nameCanonic;

    // under Unix the library names usualyl start with "lib" prefix, add it
#ifdef __UNIX__
    switch ( cat )
    {
        default:
            wxFAIL_MSG( _T("unknown wxDynamicLibraryCategory value") );
            // fall through

        case wxDL_MODULE:
            // don't do anything for modules, their names are arbitrary
            break;

        case wxDL_LIBRARY:
            // library names should start with "lib" under Unix
            nameCanonic = _T("lib");
            break;
    }
#endif // __UNIX__

    nameCanonic << name << GetDllExt();
    return nameCanonic;
}

/*static*/
wxString wxDynamicLibrary::CanonicalizePluginName(const wxString& name,
                                                  wxPluginCategory cat)
{
    wxString suffix;
    if ( cat == wxDL_PLUGIN_GUI )
    {
        wxAppTraits *traits = wxAppConsole::GetInstance() ?
                              wxAppConsole::GetInstance()->GetTraits() : NULL;
        wxASSERT_MSG( traits,
               _("can't query for GUI plugins name in console applications") );
        suffix = traits->GetToolkitInfo().shortName;
    }
#if wxUSE_UNICODE
    suffix << _T('u');
#endif
#ifdef __WXDEBUG__
    suffix << _T('d');
#endif

    if ( !suffix.empty() )
        suffix = wxString(_T("_")) + suffix;

#define WXSTRINGIZE(x)  #x
#ifdef __UNIX__
    #if (wxMINOR_VERSION % 2) == 0
        #define wxDLLVER(x,y,z) "-" WXSTRINGIZE(x) "." WXSTRINGIZE(y)
    #else
        #define wxDLLVER(x,y,z) "-" WXSTRINGIZE(x) "." WXSTRINGIZE(y) "." WXSTRINGIZE(z)
    #endif
#else
    #if (wxMINOR_VERSION % 2) == 0
        #define wxDLLVER(x,y,z) WXSTRINGIZE(x) WXSTRINGIZE(y)
    #else
        #define wxDLLVER(x,y,z) WXSTRINGIZE(x) WXSTRINGIZE(y) WXSTRINGIZE(z)
    #endif
#endif

    suffix << wxString::FromAscii(wxDLLVER(wxMAJOR_VERSION, wxMINOR_VERSION,
                                           wxRELEASE_NUMBER));
#undef wxDLLVER
#undef WXSTRINGIZE

    return CanonicalizeName(name + suffix, wxDL_MODULE);
}

/*static*/
wxString wxDynamicLibrary::GetPluginsDirectory()
{
#ifdef __UNIX__
    wxString format = wxGetInstallPrefix();
    format << wxFILE_SEP_PATH
           << wxT("lib") << wxFILE_SEP_PATH
           << wxT("wx") << wxFILE_SEP_PATH
           << wxT("%i.%i");
    wxString dir;
    dir.Printf(format.c_str(), wxMAJOR_VERSION, wxMINOR_VERSION);
    return dir;
#else
    return wxEmptyString;
#endif
}


#endif // wxUSE_DYNLIB_CLASS
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: dynlib.cpp
	3	// Purpose: Dynamic library management
	4	// Author: Guilhem Lavaux
	5	// Modified by:
	6	// Created: 20/07/98
	7	// RCS-ID: $Id$
	8	// Copyright: (c) Guilhem Lavaux
	9	// Licence: wxWindows licence
	10	/////////////////////////////////////////////////////////////////////////////
	11
	12	// ============================================================================
	13	// declarations
	14	// ============================================================================
	15
	16	// ----------------------------------------------------------------------------
	17	// headers
	18	// ----------------------------------------------------------------------------
	19
	20	#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
	21	# pragma implementation "dynlib.h"
	22	#endif
	23
	24	#include "wx/wxprec.h"
	25
	26	#ifdef __BORLANDC__
	27	#pragma hdrstop
	28	#endif
	29
	30	#if wxUSE_DYNLIB_CLASS
	31
	32	#if defined(__WINDOWS__)
	33	#include "wx/msw/private.h"
	34	#endif
	35
	36	#include "wx/dynlib.h"
	37	#include "wx/filefn.h"
	38	#include "wx/intl.h"
	39	#include "wx/log.h"
	40	#include "wx/utils.h"
	41	#include "wx/filename.h" // for SplitPath()
	42	#include "wx/app.h"
	43	#include "wx/apptrait.h"
	44
	45	#if defined(__WXMAC__)
	46	#include "wx/mac/private.h"
	47	#endif
	48
	49
	50	// ============================================================================
	51	// implementation
	52	// ============================================================================
	53
	54	#if defined(__DARWIN__)
	55	// ---------------------------------------------------------------------------
	56	// For Darwin/Mac OS X
	57	// supply the sun style dlopen functions in terms of Darwin NS*
	58	// ---------------------------------------------------------------------------
	59
	60	/* Porting notes:
	61	* The dlopen port is a port from dl_next.xs by Anno Siegel.
	62	* dl_next.xs is itself a port from dl_dlopen.xs by Paul Marquess.
	63	* The method used here is just to supply the sun style dlopen etc.
	64	* functions in terms of Darwin NS*.
	65	*/
	66
	67	#include <stdio.h>
	68	#include <mach-o/dyld.h>
	69
	70	static char dl_last_error[1024];
	71
	72	static
	73	void TranslateError(const char *path, int number)
	74	{
	75	unsigned int index;
	76	static char *OFIErrorStrings[] =
	77	{
	78	"%s(%d): Object Image Load Failure\n",
	79	"%s(%d): Object Image Load Success\n",
	80	"%s(%d): Not an recognisable object file\n",
	81	"%s(%d): No valid architecture\n",
	82	"%s(%d): Object image has an invalid format\n",
	83	"%s(%d): Invalid access (permissions?)\n",
	84	"%s(%d): Unknown error code from NSCreateObjectFileImageFromFile\n",
	85	};
	86	#define NUM_OFI_ERRORS (sizeof(OFIErrorStrings) / sizeof(OFIErrorStrings[0]))
	87
	88	index = number;
	89	if (index > NUM_OFI_ERRORS - 1) {
	90	index = NUM_OFI_ERRORS - 1;
	91	}
	92	sprintf(dl_last_error, OFIErrorStrings[index], path, number);
	93	}
	94
	95	const char *dlerror()
	96	{
	97	return dl_last_error;
	98	}
	99
	100	void dlopen(const char path, int WXUNUSED(mode) /* mode is ignored */)
	101	{
	102	int dyld_result;
	103	NSObjectFileImage ofile;
	104	NSModule handle = NULL;
	105
	106	dyld_result = NSCreateObjectFileImageFromFile(path, &ofile);
	107	if (dyld_result != NSObjectFileImageSuccess)
	108	{
	109	TranslateError(path, dyld_result);
	110	}
	111	else
	112	{
	113	// NSLinkModule will cause the run to abort on any link error's
	114	// not very friendly but the error recovery functionality is limited.
	115	handle = NSLinkModule(ofile, path, NSLINKMODULE_OPTION_BINDNOW);
	116	}
	117
	118	return handle;
	119	}
	120
	121	int dlclose(void *handle)
	122	{
	123	NSUnLinkModule( handle, NSUNLINKMODULE_OPTION_NONE);
	124	return 0;
	125	}
	126
	127	void dlsym(void handle, const char *symbol)
	128	{
	129	void *addr;
	130
	131	NSSymbol nsSymbol = NSLookupSymbolInModule( handle , symbol ) ;
	132
	133	if ( nsSymbol)
	134	{
	135	addr = NSAddressOfSymbol(nsSymbol);
	136	}
	137	else
	138	{
	139	addr = NULL;
	140	}
	141	return addr;
	142	}
	143
	144	#endif // defined(__DARWIN__)
	145
	146
	147	// ---------------------------------------------------------------------------
	148	// wxDynamicLibrary
	149	// ---------------------------------------------------------------------------
	150
	151	//FIXME: This class isn't really common at all, it should be moved into
	152	// platform dependent files.
	153
	154	#if defined(__WINDOWS__) \|\| defined(__WXPM__) \|\| defined(__EMX__)
	155	const wxChar *wxDynamicLibrary::ms_dllext = _T(".dll");
	156	#elif defined(__UNIX__)
	157	#if defined(__HPUX__)
	158	const wxChar *wxDynamicLibrary::ms_dllext = _T(".sl");
	159	#else
	160	const wxChar *wxDynamicLibrary::ms_dllext = _T(".so");
	161	#endif
	162	#endif
	163
	164	wxDllType wxDynamicLibrary::GetProgramHandle()
	165	{
	166	#if defined( HAVE_DLOPEN ) && !defined(__EMX__)
	167	return dlopen(0, RTLD_LAZY);
	168	#elif defined (HAVE_SHL_LOAD)
	169	return PROG_HANDLE;
	170	#else
	171	wxFAIL_MSG( wxT("This method is not implemented under Windows or OS/2"));
	172	return 0;
	173	#endif
	174	}
	175
	176	bool wxDynamicLibrary::Load(wxString libname, int flags)
	177	{
	178	wxASSERT_MSG(m_handle == 0, _T("Library already loaded."));
	179
	180	// add the proper extension for the DLL ourselves unless told not to
	181	if ( !(flags & wxDL_VERBATIM) )
	182	{
	183	// and also check that the libname doesn't already have it
	184	wxString ext;
	185	wxFileName::SplitPath(libname, NULL, NULL, &ext);
	186	if ( ext.empty() )
	187	{
	188	libname += GetDllExt();
	189	}
	190	}
	191
	192	// different ways to load a shared library
	193	//
	194	// FIXME: should go to the platform-specific files!
	195	#if defined(__WXMAC__) && !defined(__DARWIN__)
	196	FSSpec myFSSpec;
	197	Ptr myMainAddr;
	198	Str255 myErrName;
	199
	200	wxMacFilename2FSSpec( libname , &myFSSpec );
	201
	202	if( GetDiskFragment( &myFSSpec,
	203	0,
	204	kCFragGoesToEOF,
	205	"\p",
	206	kPrivateCFragCopy,
	207	&m_handle,
	208	&myMainAddr,
	209	myErrName ) != noErr )
	210	{
	211	p2cstr( myErrName );
	212	wxLogSysError( _("Failed to load shared library '%s' Error '%s'"),
	213	libname.c_str(),
	214	(char*)myErrName );
	215	m_handle = 0;
	216	}
	217
	218	#elif defined(__WXPM__) \|\| defined(__EMX__)
	219	char err[256] = "";
	220	DosLoadModule(err, sizeof(err), libname.c_str(), &m_handle);
	221
	222	#elif defined(HAVE_DLOPEN) \|\| defined(__DARWIN__)
	223
	224	#if defined(__VMS) \|\| defined(__DARWIN__)
	225	m_handle = dlopen(libname.c_str(), 0); // The second parameter is ignored
	226	#else // !__VMS && !__DARWIN__
	227	int rtldFlags = 0;
	228
	229	if ( flags & wxDL_LAZY )
	230	{
	231	wxASSERT_MSG( (flags & wxDL_NOW) == 0,
	232	_T("wxDL_LAZY and wxDL_NOW are mutually exclusive.") );
	233	#ifdef RTLD_LAZY
	234	rtldFlags \|= RTLD_LAZY;
	235	#else
	236	wxLogDebug(_T("wxDL_LAZY is not supported on this platform"));
	237	#endif
	238	}
	239	else if ( flags & wxDL_NOW )
	240	{
	241	#ifdef RTLD_NOW
	242	rtldFlags \|= RTLD_NOW;
	243	#else
	244	wxLogDebug(_T("wxDL_NOW is not supported on this platform"));
	245	#endif
	246	}
	247
	248	if ( flags & wxDL_GLOBAL )
	249	{
	250	#ifdef RTLD_GLOBAL
	251	rtldFlags \|= RTLD_GLOBAL;
	252	#else
	253	wxLogDebug(_T("RTLD_GLOBAL is not supported on this platform."));
	254	#endif
	255	}
	256
	257	m_handle = dlopen(libname.fn_str(), rtldFlags);
	258	#endif // __VMS \|\| __DARWIN__ ?
	259
	260	#elif defined(HAVE_SHL_LOAD)
	261	int shlFlags = 0;
	262
	263	if( flags & wxDL_LAZY )
	264	{
	265	wxASSERT_MSG( (flags & wxDL_NOW) == 0,
	266	_T("wxDL_LAZY and wxDL_NOW are mutually exclusive.") );
	267	shlFlags \|= BIND_DEFERRED;
	268	}
	269	else if( flags & wxDL_NOW )
	270	{
	271	shlFlags \|= BIND_IMMEDIATE;
	272	}
	273	m_handle = shl_load(libname.fn_str(), BIND_DEFERRED, 0);
	274
	275	#elif defined(__WINDOWS__)
	276	m_handle = ::LoadLibrary(libname.c_str());
	277	#else
	278	#error "runtime shared lib support not implemented on this platform"
	279	#endif
	280
	281	if ( m_handle == 0 )
	282	{
	283	wxString msg(_("Failed to load shared library '%s'"));
	284	#if defined(HAVE_DLERROR) && !defined(__EMX__)
	285
	286	#if wxUSE_UNICODE
	287	wxWCharBuffer buffer = wxConvLocal.cMB2WC( dlerror() );
	288	const wxChar *err = buffer;
	289	#else
	290	const wxChar *err = dlerror();
	291	#endif
	292
	293	if( err )
	294	wxLogError( msg, err );
	295	#else
	296	wxLogSysError( msg, libname.c_str() );
	297	#endif
	298	}
	299
	300	return IsLoaded();
	301	}
	302
	303	/* static */
	304	void wxDynamicLibrary::Unload(wxDllType handle)
	305	{
	306	#if defined(__WXPM__) \|\| defined(__EMX__)
	307	DosFreeModule( handle );
	308	#elif defined(HAVE_DLOPEN) \|\| defined(__DARWIN__)
	309	dlclose( handle );
	310	#elif defined(HAVE_SHL_LOAD)
	311	shl_unload( handle );
	312	#elif defined(__WINDOWS__)
	313	::FreeLibrary( handle );
	314	#elif defined(__WXMAC__) && !defined(__DARWIN__)
	315	CloseConnection( (CFragConnectionID*) &handle );
	316	#else
	317	#error "runtime shared lib support not implemented"
	318	#endif
	319	}
	320
	321	void wxDynamicLibrary::GetSymbol(const wxString &name, bool success) const
	322	{
	323	wxCHECK_MSG( IsLoaded(), NULL,
	324	_T("Can't load symbol from unloaded library") );
	325
	326	bool failed = FALSE;
	327	void *symbol = 0;
	328
	329	#if defined(__WXMAC__) && !defined(__DARWIN__)
	330	Ptr symAddress;
	331	CFragSymbolClass symClass;
	332	Str255 symName;
	333	#if TARGET_CARBON
	334	c2pstrcpy( (StringPtr) symName, name );
	335	#else
	336	strcpy( (char *)symName, name );
	337	c2pstr( (char *)symName );
	338	#endif
	339	if( FindSymbol( dllHandle, symName, &symAddress, &symClass ) == noErr )
	340	symbol = (void *)symAddress;
	341
	342	#elif defined(__WXPM__) \|\| defined(__EMX__)
	343	DosQueryProcAddr( m_handle, 1L, name.c_str(), (PFN*)symbol );
	344
	345	#elif defined(HAVE_DLOPEN) \|\| defined(__DARWIN__)
	346	symbol = dlsym( m_handle, name.fn_str() );
	347
	348	#elif defined(HAVE_SHL_LOAD)
	349	// use local variable since shl_findsym modifies the handle argument
	350	// to indicate where the symbol was found (GD)
	351	wxDllType the_handle = m_handle;
	352	if( shl_findsym( &the_handle, name.fn_str(), TYPE_UNDEFINED, &symbol ) != 0 )
	353	symbol = 0;
	354
	355	#elif defined(__WINDOWS__)
	356	symbol = (void*) ::GetProcAddress( m_handle, name.mb_str() );
	357
	358	#else
	359	#error "runtime shared lib support not implemented"
	360	#endif
	361
	362	if ( !symbol )
	363	{
	364	#if defined(HAVE_DLERROR) && !defined(__EMX__)
	365
	366	#if wxUSE_UNICODE
	367	wxWCharBuffer buffer = wxConvLocal.cMB2WC( dlerror() );
	368	const wxChar *err = buffer;
	369	#else
	370	const wxChar *err = dlerror();
	371	#endif
	372
	373	if( err )
	374	{
	375	wxLogError(wxT("%s"), err);
	376	}
	377	#else
	378	failed = TRUE;
	379	wxLogSysError(_("Couldn't find symbol '%s' in a dynamic library"),
	380	name.c_str());
	381	#endif
	382	}
	383	if( success )
	384	*success = !failed;
	385
	386	return symbol;
	387	}
	388
	389
	390	/static/
	391	wxString
	392	wxDynamicLibrary::CanonicalizeName(const wxString& name,
	393	wxDynamicLibraryCategory
	394	#ifdef __UNIX__
	395	cat
	396	#else // !__UNIX__
	397	WXUNUSED(cat)
	398	#endif // __UNIX__/!__UNIX__
	399	)
	400	{
	401	wxString nameCanonic;
	402
	403	// under Unix the library names usualyl start with "lib" prefix, add it
	404	#ifdef __UNIX__
	405	switch ( cat )
	406	{
	407	default:
	408	wxFAIL_MSG( _T("unknown wxDynamicLibraryCategory value") );
	409	// fall through
	410
	411	case wxDL_MODULE:
	412	// don't do anything for modules, their names are arbitrary
	413	break;
	414
	415	case wxDL_LIBRARY:
	416	// library names should start with "lib" under Unix
	417	nameCanonic = _T("lib");
	418	break;
	419	}
	420	#endif // __UNIX__
	421
	422	nameCanonic << name << GetDllExt();
	423	return nameCanonic;
	424	}
	425
	426	/static/
	427	wxString wxDynamicLibrary::CanonicalizePluginName(const wxString& name,
	428	wxPluginCategory cat)
	429	{
	430	wxString suffix;
	431	if ( cat == wxDL_PLUGIN_GUI )
	432	{
	433	wxAppTraits *traits = wxAppConsole::GetInstance() ?
	434	wxAppConsole::GetInstance()->GetTraits() : NULL;
	435	wxASSERT_MSG( traits,
	436	_("can't query for GUI plugins name in console applications") );
	437	suffix = traits->GetToolkitInfo().shortName;
	438	}
	439	#if wxUSE_UNICODE
	440	suffix << _T('u');
	441	#endif
	442	#ifdef __WXDEBUG__
	443	suffix << _T('d');
	444	#endif
	445
	446	if ( !suffix.empty() )
	447	suffix = wxString(_T("_")) + suffix;
	448
	449	#define WXSTRINGIZE(x) #x
	450	#ifdef __UNIX__
	451	#if (wxMINOR_VERSION % 2) == 0
	452	#define wxDLLVER(x,y,z) "-" WXSTRINGIZE(x) "." WXSTRINGIZE(y)
	453	#else
	454	#define wxDLLVER(x,y,z) "-" WXSTRINGIZE(x) "." WXSTRINGIZE(y) "." WXSTRINGIZE(z)
	455	#endif
	456	#else
	457	#if (wxMINOR_VERSION % 2) == 0
	458	#define wxDLLVER(x,y,z) WXSTRINGIZE(x) WXSTRINGIZE(y)
	459	#else
	460	#define wxDLLVER(x,y,z) WXSTRINGIZE(x) WXSTRINGIZE(y) WXSTRINGIZE(z)
	461	#endif
	462	#endif
	463
	464	suffix << wxString::FromAscii(wxDLLVER(wxMAJOR_VERSION, wxMINOR_VERSION,
	465	wxRELEASE_NUMBER));
	466	#undef wxDLLVER
	467	#undef WXSTRINGIZE
	468
	469	return CanonicalizeName(name + suffix, wxDL_MODULE);
	470	}
	471
	472	/static/
	473	wxString wxDynamicLibrary::GetPluginsDirectory()
	474	{
	475	#ifdef __UNIX__
	476	wxString format = wxGetInstallPrefix();
	477	format << wxFILE_SEP_PATH
	478	<< wxT("lib") << wxFILE_SEP_PATH
	479	<< wxT("wx") << wxFILE_SEP_PATH
	480	<< wxT("%i.%i");
	481	wxString dir;
	482	dir.Printf(format.c_str(), wxMAJOR_VERSION, wxMINOR_VERSION);
	483	return dir;
	484	#else
	485	return wxEmptyString;
	486	#endif
	487	}
	488
	489
	490	#endif // wxUSE_DYNLIB_CLASS