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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;
import com.jogamp.common.util.SecurityUtil;
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
public final long openLibraryLocal(String libraryName, boolean debug) throws SecurityException {
// How does that work under Windows ?
// Don't know .. so it's an alias for the time being
return openLibraryGlobal(libraryName, debug);
}
@Override
public final long openLibraryGlobal(String libraryName, boolean debug) throws SecurityException {
SecurityUtil.checkLinkPermission(libraryName);
final long handle = LoadLibraryW(libraryName);
if( 0 != handle ) {
incrLibRefCount(handle, libraryName);
} else if ( DEBUG || debug ) {
int err = GetLastError();
System.err.println("LoadLibraryW \""+libraryName+"\" failed, error code: 0x"+Integer.toHexString(err)+", "+err);
}
return handle;
}
@Override
public final long lookupSymbolGlobal(String symbolName) throws SecurityException {
SecurityUtil.checkAllLinkPermission();
if(DEBUG_LOOKUP) {
System.err.println("lookupSymbolGlobal: Not supported on Windows");
}
// allow DynamicLibraryBundle to continue w/ local libs
return 0;
}
@Override
public final long lookupSymbol(long libraryHandle, String symbolName) throws IllegalArgumentException {
if( null == getLibRef( libraryHandle ) ) {
throw new IllegalArgumentException("Library handle 0x"+Long.toHexString(libraryHandle)+" unknown.");
}
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)
final int argAlignment=4; // 4 byte alignment of each argument
final int maxArguments=12; // experience ..
for(int arg=0; 0==addr && arg<=maxArguments; arg++) {
_symbolName = symbolName+"@"+(arg*argAlignment);
addr = GetProcAddressA(libraryHandle, _symbolName);
}
}
if(DEBUG_LOOKUP) {
System.err.println("DynamicLinkerImpl.lookupSymbol(0x"+Long.toHexString(libraryHandle)+", "+symbolName+") -> "+_symbolName+", 0x"+Long.toHexString(addr));
}
return addr;
}
@Override
public final void closeLibrary(long libraryHandle) throws IllegalArgumentException {
if( null == decrLibRefCount( libraryHandle ) ) {
throw new IllegalArgumentException("Library handle 0x"+Long.toHexString(libraryHandle)+" unknown.");
}
FreeLibrary(libraryHandle);
}
@Override
public final String getLastError() {
final int err = GetLastError();
return "Last error: 0x"+Integer.toHexString(err)+" ("+err+")";
}
}
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