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Diffstat (limited to 'libs/appleutility/CoreAudio/PublicUtility/CASharedLibrary.cpp')
-rw-r--r-- | libs/appleutility/CoreAudio/PublicUtility/CASharedLibrary.cpp | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/libs/appleutility/CoreAudio/PublicUtility/CASharedLibrary.cpp b/libs/appleutility/CoreAudio/PublicUtility/CASharedLibrary.cpp new file mode 100644 index 0000000000..0e39ac7e52 --- /dev/null +++ b/libs/appleutility/CoreAudio/PublicUtility/CASharedLibrary.cpp @@ -0,0 +1,118 @@ +/* + File: CASharedLibrary.cpp + Abstract: CASharedLibrary.h + Version: 1.1 + + Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple + Inc. ("Apple") in consideration of your agreement to the following + terms, and your use, installation, modification or redistribution of + this Apple software constitutes acceptance of these terms. If you do + not agree with these terms, please do not use, install, modify or + redistribute this Apple software. + + In consideration of your agreement to abide by the following terms, and + subject to these terms, Apple grants you a personal, non-exclusive + license, under Apple's copyrights in this original Apple software (the + "Apple Software"), to use, reproduce, modify and redistribute the Apple + Software, with or without modifications, in source and/or binary forms; + provided that if you redistribute the Apple Software in its entirety and + without modifications, you must retain this notice and the following + text and disclaimers in all such redistributions of the Apple Software. + Neither the name, trademarks, service marks or logos of Apple Inc. may + be used to endorse or promote products derived from the Apple Software + without specific prior written permission from Apple. Except as + expressly stated in this notice, no other rights or licenses, express or + implied, are granted by Apple herein, including but not limited to any + patent rights that may be infringed by your derivative works or by other + works in which the Apple Software may be incorporated. + + The Apple Software is provided by Apple on an "AS IS" basis. APPLE + MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION + THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS + FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND + OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS. + + IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL + OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, + MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED + AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE), + STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE + POSSIBILITY OF SUCH DAMAGE. + + Copyright (C) 2014 Apple Inc. All Rights Reserved. + +*/ +//============================================================================= +// Includes +//============================================================================= + +#include "CASharedLibrary.h" + +//#define CASharedLibrary_Use_DYLD 1 +#if CASharedLibrary_Use_DYLD + #include <mach-o/dyld.h> +#else + #include <dlfcn.h> + #include <stddef.h> +#endif + +//============================================================================= +// CASharedLibrary +//============================================================================= + +void* CASharedLibrary::LoadLibraryAndGetRoutineAddress(const char* inRoutineName, const char* /*inLibraryName*/, const char* inLibraryPath) +{ + void* theRoutine = 0; + +#if CASharedLibrary_Use_DYLD + const struct mach_header* theImage = NSAddImage(inLibraryPath, NSADDIMAGE_OPTION_RETURN_ON_ERROR); + if(theImage != 0) + { + NSSymbol theSymbol = NSLookupSymbolInImage(theImage, inRoutineName, NSLOOKUPSYMBOLINIMAGE_OPTION_BIND); + if(theSymbol != 0) + { + theRoutine = NSAddressOfSymbol(theSymbol); + } + } +#else + void* theImage = dlopen(inLibraryPath, RTLD_LAZY); + if(theImage != NULL) + { + // we assume that all routine names passed here have a leading underscore which gets shaved + // off when passed to dlsym + theRoutine = dlsym(theImage, &(inRoutineName[1])); + } + +#endif + + return theRoutine; +} + +void* CASharedLibrary::GetRoutineAddressIfLibraryLoaded(const char* inRoutineName, const char* /*inLibraryName*/, const char* inLibraryPath) +{ + void* theRoutine = 0; + +#if CASharedLibrary_Use_DYLD + const struct mach_header* theImage = NSAddImage(inLibraryPath, NSADDIMAGE_OPTION_RETURN_ONLY_IF_LOADED); + if(theImage != 0) + { + NSSymbol theSymbol = NSLookupSymbolInImage(theImage, inRoutineName, NSLOOKUPSYMBOLINIMAGE_OPTION_BIND); + if(theSymbol != 0) + { + theRoutine = NSAddressOfSymbol(theSymbol); + } + } +#else + void* theImage = dlopen(inLibraryPath, RTLD_LAZY | RTLD_NOLOAD); + if(theImage != NULL) + { + // we assume that all routine names passed here have a leading underscore which gets shaved + // off when passed to dlsym + theRoutine = dlsym(theImage, &(inRoutineName[1])); + } +#endif + + return theRoutine; +} |