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package jogamp.common.os;
import com.jogamp.common.os.DynamicLinker;
import com.jogamp.common.util.SecurityUtil;
public class UnixDynamicLinkerImpl implements DynamicLinker {
private static final long RTLD_DEFAULT = 0;
// static final long RTLD_NEXT = -1L;
private static final int RTLD_LAZY = 0x00001;
// static final int RTLD_NOW = 0x00002;
private static final int RTLD_LOCAL = 0x00000;
private static final int RTLD_GLOBAL = 0x00100;
/** Interface to C language function: <br> <code> int dlclose(void * ); </code> */
/* pp */ static native int dlclose(long arg0);
/** Interface to C language function: <br> <code> char * dlerror(void); </code> */
/* pp */ static native java.lang.String dlerror();
/** Interface to C language function: <br> <code> void * dlopen(const char * , int); </code> */
/* pp */ static native long dlopen(java.lang.String arg0, int arg1);
/** Interface to C language function: <br> <code> void * dlsym(void * , const char * ); </code> */
/* pp */ static native long dlsym(long arg0, java.lang.String arg1);
// --- Begin CustomJavaCode .cfg declarations
public long openLibraryLocal(String pathname, boolean debug) throws SecurityException {
// Note we use RTLD_GLOBAL visibility to _NOT_ allow this functionality to
// be used to pre-resolve dependent libraries of JNI code without
// requiring that all references to symbols in those libraries be
// looked up dynamically via the ProcAddressTable mechanism; in
// other words, one can actually link against the library instead of
// having to dlsym all entry points. System.loadLibrary() uses
// RTLD_LOCAL visibility so can't be used for this purpose.
SecurityUtil.checkLinkPermission(pathname);
return dlopen(pathname, RTLD_LAZY | RTLD_LOCAL);
}
public long openLibraryGlobal(String pathname, boolean debug) throws SecurityException {
// Note we use RTLD_GLOBAL visibility to allow this functionality to
// be used to pre-resolve dependent libraries of JNI code without
// requiring that all references to symbols in those libraries be
// looked up dynamically via the ProcAddressTable mechanism; in
// other words, one can actually link against the library instead of
// having to dlsym all entry points. System.loadLibrary() uses
// RTLD_LOCAL visibility so can't be used for this purpose.
SecurityUtil.checkLinkPermission(pathname);
return dlopen(pathname, RTLD_LAZY | RTLD_GLOBAL);
}
public long lookupSymbol(long libraryHandle, String symbolName) {
final long addr = dlsym(libraryHandle, symbolName);
if(DEBUG_LOOKUP) {
System.err.println("DynamicLinkerImpl.lookupSymbol(0x"+Long.toHexString(libraryHandle)+", "+symbolName+") -> 0x"+Long.toHexString(addr));
}
return addr;
}
public long lookupSymbolGlobal(String symbolName) {
final long addr = dlsym(RTLD_DEFAULT, symbolName);
if(DEBUG_LOOKUP) {
System.err.println("DynamicLinkerImpl.lookupSymbolGlobal("+symbolName+") -> 0x"+Long.toHexString(addr));
}
return addr;
}
public void closeLibrary(long libraryHandle) {
dlclose(libraryHandle);
}
public String getLastError() {
return dlerror();
}
}
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