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.fn_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.fn_str() );
#else
    strcpy( (char *)symName, name.fn_str() );
    c2pstr( (char *)symName );
#endif
    if( FindSymbol( m_handle, 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__)
#ifdef __WXWINCE__
    symbol = (void*) ::GetProcAddress( m_handle, name );
#else
    symbol = (void*) ::GetProcAddress( m_handle, name.mb_str() );
#endif

#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

#ifdef __WINDOWS__
    // Add compiler identification:
    #if defined(__GNUG__)
        suffix << _T("_gcc");
    #elif defined(__VISUALC__)
        suffix << _T("_vc");
    #elif defined(__WATCOMC__)
        suffix << _T("_wat");
    #elif defined(__BORLANDC__)
        suffix << _T("_bcc");
    #endif
#endif

    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.fn_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.fn_str() );
	335	#else
	336	strcpy( (char *)symName, name.fn_str() );
	337	c2pstr( (char *)symName );
	338	#endif
	339	if( FindSymbol( m_handle, 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	#ifdef __WXWINCE__
	357	symbol = (void*) ::GetProcAddress( m_handle, name );
	358	#else
	359	symbol = (void*) ::GetProcAddress( m_handle, name.mb_str() );
	360	#endif
	361
	362	#else
	363	#error "runtime shared lib support not implemented"
	364	#endif
	365
	366	if ( !symbol )
	367	{
	368	#if defined(HAVE_DLERROR) && !defined(__EMX__)
	369
	370	#if wxUSE_UNICODE
	371	wxWCharBuffer buffer = wxConvLocal.cMB2WC( dlerror() );
	372	const wxChar *err = buffer;
	373	#else
	374	const wxChar *err = dlerror();
	375	#endif
	376
	377	if( err )
	378	{
	379	wxLogError(wxT("%s"), err);
	380	}
	381	#else
	382	failed = TRUE;
	383	wxLogSysError(_("Couldn't find symbol '%s' in a dynamic library"),
	384	name.c_str());
	385	#endif
	386	}
	387	if( success )
	388	*success = !failed;
	389
	390	return symbol;
	391	}
	392
	393
	394	/static/
	395	wxString
	396	wxDynamicLibrary::CanonicalizeName(const wxString& name,
	397	wxDynamicLibraryCategory
	398	#ifdef __UNIX__
	399	cat
	400	#else // !__UNIX__
	401	WXUNUSED(cat)
	402	#endif // __UNIX__/!__UNIX__
	403	)
	404	{
	405	wxString nameCanonic;
	406
	407	// under Unix the library names usualyl start with "lib" prefix, add it
	408	#ifdef __UNIX__
	409	switch ( cat )
	410	{
	411	default:
	412	wxFAIL_MSG( _T("unknown wxDynamicLibraryCategory value") );
	413	// fall through
	414
	415	case wxDL_MODULE:
	416	// don't do anything for modules, their names are arbitrary
	417	break;
	418
	419	case wxDL_LIBRARY:
	420	// library names should start with "lib" under Unix
	421	nameCanonic = _T("lib");
	422	break;
	423	}
	424	#endif // __UNIX__
	425
	426	nameCanonic << name << GetDllExt();
	427	return nameCanonic;
	428	}
	429
	430	/static/
	431	wxString wxDynamicLibrary::CanonicalizePluginName(const wxString& name,
	432	wxPluginCategory cat)
	433	{
	434	wxString suffix;
	435	if ( cat == wxDL_PLUGIN_GUI )
	436	{
	437	wxAppTraits *traits = wxAppConsole::GetInstance() ?
	438	wxAppConsole::GetInstance()->GetTraits() : NULL;
	439	wxASSERT_MSG( traits,
	440	_("can't query for GUI plugins name in console applications") );
	441	suffix = traits->GetToolkitInfo().shortName;
	442	}
	443	#if wxUSE_UNICODE
	444	suffix << _T('u');
	445	#endif
	446	#ifdef __WXDEBUG__
	447	suffix << _T('d');
	448	#endif
	449
	450	if ( !suffix.empty() )
	451	suffix = wxString(_T("_")) + suffix;
	452
	453	#define WXSTRINGIZE(x) #x
	454	#ifdef __UNIX__
	455	#if (wxMINOR_VERSION % 2) == 0
	456	#define wxDLLVER(x,y,z) "-" WXSTRINGIZE(x) "." WXSTRINGIZE(y)
	457	#else
	458	#define wxDLLVER(x,y,z) "-" WXSTRINGIZE(x) "." WXSTRINGIZE(y) "." WXSTRINGIZE(z)
	459	#endif
	460	#else
	461	#if (wxMINOR_VERSION % 2) == 0
	462	#define wxDLLVER(x,y,z) WXSTRINGIZE(x) WXSTRINGIZE(y)
	463	#else
	464	#define wxDLLVER(x,y,z) WXSTRINGIZE(x) WXSTRINGIZE(y) WXSTRINGIZE(z)
	465	#endif
	466	#endif
	467
	468	suffix << wxString::FromAscii(wxDLLVER(wxMAJOR_VERSION, wxMINOR_VERSION,
	469	wxRELEASE_NUMBER));
	470	#undef wxDLLVER
	471	#undef WXSTRINGIZE
	472
	473	#ifdef __WINDOWS__
	474	// Add compiler identification:
	475	#if defined(__GNUG__)
	476	suffix << _T("_gcc");
	477	#elif defined(__VISUALC__)
	478	suffix << _T("_vc");
	479	#elif defined(__WATCOMC__)
	480	suffix << _T("_wat");
	481	#elif defined(__BORLANDC__)
	482	suffix << _T("_bcc");
	483	#endif
	484	#endif
	485
	486	return CanonicalizeName(name + suffix, wxDL_MODULE);
	487	}
	488
	489	/static/
	490	wxString wxDynamicLibrary::GetPluginsDirectory()
	491	{
	492	#ifdef __UNIX__
	493	wxString format = wxGetInstallPrefix();
	494	format << wxFILE_SEP_PATH
	495	<< wxT("lib") << wxFILE_SEP_PATH
	496	<< wxT("wx") << wxFILE_SEP_PATH
	497	<< wxT("%i.%i");
	498	wxString dir;
	499	dir.Printf(format.c_str(), wxMAJOR_VERSION, wxMINOR_VERSION);
	500	return dir;
	501	#else
	502	return wxEmptyString;
	503	#endif
	504	}
	505
	506
	507	#endif // wxUSE_DYNLIB_CLASS