///////////////////////////////////////////////////////////////////////
private static bool UnloadNativeLibrary(
Interpreter interpreter /* NOT USED */
)
{
lock (syncRoot) /* TRANSACTIONAL */
{
if (nativeModule == IntPtr.Zero)
{
return(true);
}
try
{
UnsetNativeDelegates();
int lastError;
if (NativeOps.FreeLibrary(
nativeModule, out lastError)) /* throw */
{
nativeModule = IntPtr.Zero;
nativeFileName = null;
TraceOps.DebugTrace(
"UnloadNativeLibrary: successfully unloaded",
typeof(NativeUtility).Name,
TracePriority.NativeDebug);
return(true);
}
else
{
TraceOps.DebugTrace(String.Format(
"FreeLibrary(0x{1:X}) failed with error {0}: {2}",
lastError, nativeModule,
NativeOps.GetDynamicLoadingError(lastError).Trim()),
typeof(NativeUtility).Name,
TracePriority.NativeError);
}
}
catch (Exception e)
{
TraceOps.DebugTrace(
e, typeof(NativeUtility).Name,
TracePriority.NativeError);
}
return(false);
}
}
///////////////////////////////////////////////////////////////////////
#region Public Methods (Internal Use Only)
public ReturnCode UnloadNoThrow( /* EXEMPT: object-15.11 */
ref int loaded,
ref Result error
)
{
// CheckDisposed(); /* EXEMPT */
lock (syncRoot) /* TRANSACTIONAL */
{
//
// NOTE: If the module was already loaded previously,
// do nothing.
//
if (module == IntPtr.Zero)
{
return(ReturnCode.Ok);
}
//
// NOTE: If there are still outstanding references to
// the native module, do nothing.
//
if (Interlocked.Decrement(ref referenceCount) > 0)
{
return(ReturnCode.Ok);
}
//
// NOTE: If the native module has been locked in place
// (because it cannot be cleanly unloaded?), then
// leave it alone.
//
if (FlagOps.HasFlags(
flags, ModuleFlags.NoUnload, true))
{
return(ReturnCode.Ok);
}
try
{
int lastError;
if (NativeOps.FreeLibrary(
module, out lastError)) /* throw */
{
Interlocked.Decrement(ref loaded);
module = IntPtr.Zero;
return(ReturnCode.Ok);
}
else
{
error = String.Format(
"FreeLibrary(0x{1:X}) failed with error {0}: {2}",
lastError, module, NativeOps.GetDynamicLoadingError(
lastError));
}
}
catch (Exception e)
{
error = e;
}
}
return(ReturnCode.Error);
}
