private unsafe static long LoadLibrary(string filename, ClassLoaderWrapper loader)
{
Tracer.Info(Tracer.Jni, "loadLibrary: {0}, class loader: {1}", filename, loader);
lock(JniLock)
{
IntPtr p = ikvm_LoadLibrary(filename);
if(p == IntPtr.Zero)
{
Tracer.Info(Tracer.Jni, "Library not found: {0}", filename);
return 0;
}
try
{
foreach(IntPtr tmp in loader.GetNativeLibraries())
{
if(tmp == p)
{
// the library was already loaded by the current class loader,
// no need to do anything
ikvm_FreeLibrary(p);
Tracer.Warning(Tracer.Jni, "Library was already loaded: {0}", filename);
return p.ToInt64();
}
}
if(nativeLibraries.Contains(p))
{
string msg = string.Format("Native library {0} already loaded in another classloader", filename);
Tracer.Error(Tracer.Jni, "UnsatisfiedLinkError: {0}", msg);
throw new java.lang.UnsatisfiedLinkError(msg);
}
Tracer.Info(Tracer.Jni, "Library loaded: {0}, handle = 0x{1:X}", filename, p.ToInt64());
IntPtr onload = ikvm_GetProcAddress(p, "JNI_OnLoad", IntPtr.Size * 2);
if(onload != IntPtr.Zero)
{
Tracer.Info(Tracer.Jni, "Calling JNI_OnLoad on: {0}", filename);
JNI.Frame f = new JNI.Frame();
int version;
ClassLoaderWrapper prevLoader = f.Enter(loader);
try
{
// TODO on Whidbey we should be able to use Marshal.GetDelegateForFunctionPointer to call OnLoad
version = ikvm_CallOnLoad(onload, JavaVM.pJavaVM, null);
Tracer.Info(Tracer.Jni, "JNI_OnLoad returned: 0x{0:X8}", version);
}
finally
{
f.Leave(prevLoader);
}
if(!JNI.IsSupportedJniVersion(version))
{
string msg = string.Format("Unsupported JNI version 0x{0:X} required by {1}", version, filename);
Tracer.Error(Tracer.Jni, "UnsatisfiedLinkError: {0}", msg);
throw new java.lang.UnsatisfiedLinkError(msg);
}
}
nativeLibraries.Add(p);
loader.RegisterNativeLibrary(p);
return p.ToInt64();
}
catch
{
ikvm_FreeLibrary(p);
throw;
}
}
}