1 line
4.7 KiB
C
Executable File
1 line
4.7 KiB
C
Executable File
/* Copyright (c) 2017, Computer History Museum
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification, are permitted (subject to
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the limitations in the disclaimer below) provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following
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disclaimer in the documentation and/or other materials provided with the distribution.
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* Neither the name of Computer History Museum nor the names of its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE
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COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
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DAMAGE. */
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/*
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A template class that holds a pointer to a Mach-O framework entry point.
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Author: Marshall Clow
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Change Log:
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13-Aug-2002 mc Initial Version
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*/
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#ifndef __MACHOWRAPPER__
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#define __MACHOWRAPPER__
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#include <MacTypes.h>
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#include <CFBundle.h>
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#if !TARGET_RT_MAC_CFM
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#error "This code only works for CFM Targets!"
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#endif
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OSStatus LoadFrameworkBundle ( CFStringRef framework, CFBundleRef *bundlePtr );
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template <typename Proc>
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class MachOWrapper {
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private:
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CFBundleRef fBundle; // The reference to the framework pointer
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Proc fProcPtr; // The actual procedure pointer
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public:
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MachOWrapper ( CFStringRef framework, CFStringRef routine ) : fBundle ( NULL ), fProcPtr ( NULL ) {
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// Get the framework bundle
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OSStatus err = ::LoadFrameworkBundle ( framework, &fBundle );
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// Don't call "CFBundleGetFunctionPointerForName" with an invalid bundle - it will crash.
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if ( err != noErr )
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fBundle = NULL;
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else {
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fProcPtr = (Proc) CFBundleGetFunctionPointerForName ( fBundle, routine );
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if ( fProcPtr == nil )
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err = cfragNoSymbolErr;
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}
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// Have to throw something if we don't link up!
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}
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MachOWrapper ( CFBundleRef aBundle, CFStringRef routine ) : fBundle ( aBundle ), fProcPtr ( NULL ) {
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OSStatus err = noErr;
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CFRetain ( fBundle );
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fProcPtr = (Proc) CFBundleGetFunctionPointerForName ( fBundle, routine );
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if ( fProcPtr == nil )
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err = cfragNoSymbolErr;
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// Have to throw something if we don't link up!
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}
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~MachOWrapper () { if ( fBundle != NULL ) CFRelease ( fBundle ); }
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Boolean IsValid () const { return fProcPtr != NULL; }
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// Marshall dreams:
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// A whole set of templates for different numbers of arguments
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// The beauty of this is that only one will be instantiated by the compiler
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// for each specialization of this template.
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#if 0
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template <typename R>
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R operator () () const
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{ return fProcPtr (); }
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template <typename R, typename A1>
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R operator () (A1 arg1) const
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{ return fProcPtr (arg1); }
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template <typename R, typename A1, typename A2>
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R operator () (A1 arg1, A2 arg2) const
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{ return fProcPtr (arg1, arg2); }
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template <typename R, typename A1, typename A2, typename A3>
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R operator () (A1 arg1, A2 arg2, A3 arg3) const
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{ return fProcPtr (arg1, arg2, arg3); }
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template <typename R, typename A1, typename A2, typename A3, typename A4>
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R operator () (A1 arg1, A2 arg2, A3 arg3, A4 arg4) const
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{ return fProcPtr (arg1, arg2, arg3, arg4); }
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template <typename R, typename A1, typename A2, typename A3, typename A4, typename A5>
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R operator () (A1 arg1, A2 arg2, A3 arg3, A4 arg4, A5 arg5) const
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{ return fProcPtr (arg1, arg2, arg3, arg4, arg5); }
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template <typename R, typename A1, typename A2, typename A3, typename A4, typename A5, typename A6>
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R operator () (A1 arg1, A2 arg2, A3 arg3, A4 arg4, A5 arg5, A6 arg6) const
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{ return fProcPtr (arg1, arg2, arg3, arg4, arg5, arg6); }
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#else
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// Non-template test of general idea
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operator Proc () const { return fProcPtr; }
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#endif
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private:
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// Defined but not declared
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MachOWrapper ();
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MachOWrapper ( const MachOWrapper &rhs );
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MachOWrapper & operator = ( const MachOWrapper &rhs );
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};
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#endif
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