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/**
* Copyright 2013 JogAmp Community. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation are those of the
* authors and should not be interpreted as representing official policies, either expressed
* or implied, of JogAmp Community.
*/
package jogamp.common.os;
public final class WindowsDynamicLinkerImpl extends DynamicLinkerImpl {
/** Interface to C language function: <br> <code> BOOL FreeLibrary(HANDLE hLibModule); </code> */
private static native int FreeLibrary(long hLibModule);
/** Interface to C language function: <br> <code> DWORD GetLastError(void); </code> */
private static native int GetLastError();
/** Interface to C language function: <br> <code> PROC GetProcAddressA(HANDLE hModule, LPCSTR lpProcName); </code> */
private static native long GetProcAddressA(long hModule, java.lang.String lpProcName);
/** Interface to C language function: <br> <code> HANDLE LoadLibraryW(LPCWSTR lpLibFileName); </code> */
private static native long LoadLibraryW(java.lang.String lpLibFileName);
@Override
protected final long openLibraryLocalImpl(final String libraryName) throws SecurityException {
// How does that work under Windows ?
// Don't know .. so it's an alias to global, for the time being
return LoadLibraryW(libraryName);
}
@Override
protected final long openLibraryGlobalImpl(final String libraryName) throws SecurityException {
return LoadLibraryW(libraryName);
}
@Override
protected final long lookupSymbolGlobalImpl(final String symbolName) throws SecurityException {
if(DEBUG_LOOKUP) {
System.err.println("lookupSymbolGlobal: Not supported on Windows");
}
// allow DynamicLibraryBundle to continue w/ local libs
return 0;
}
private static final int symbolArgAlignment=4; // 4 byte alignment of each argument
private static final int symbolMaxArguments=12; // experience ..
@Override
protected final long lookupSymbolLocalImpl(final long libraryHandle, final String symbolName) throws IllegalArgumentException {
String _symbolName = symbolName;
long addr = GetProcAddressA(libraryHandle, _symbolName);
if( 0 == addr ) {
// __stdcall hack: try some @nn decorations,
// the leading '_' must not be added (same with cdecl)
for(int arg=0; 0==addr && arg<=symbolMaxArguments; arg++) {
_symbolName = symbolName+"@"+(arg*symbolArgAlignment);
addr = GetProcAddressA(libraryHandle, _symbolName);
}
}
return addr;
}
@Override
protected final void closeLibraryImpl(final long libraryHandle) throws IllegalArgumentException {
FreeLibrary(libraryHandle);
}
@Override
public final String getLastError() {
final int err = GetLastError();
return "Last error: 0x"+Integer.toHexString(err)+" ("+err+")";
}
}
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