Record plugin load failures

olla/include/openmm/Platform.h

@@ -171,6 +171,10 @@ public:
      * Get a registered Platform by index.
      */
     static Platform& getPlatform(int index);
+    /**
+     * Get any failures caused during the last call to loadPluginsFromDirectory
+     */
+    static std::vector<std::string> getLoadFailures();
     /**
      * Get the registered Platform with a particular name.  If no Platform with that name has been
      * registered, this throws an exception.
@@ -233,8 +237,10 @@ private:
     std::map<std::string, KernelFactory*> kernelFactories;
     std::map<std::string, std::string> defaultProperties;
     static std::vector<Platform*>& getPlatforms();
+    static std::vector<std::string> loadFailures;
 };
 
+
 } // namespace OpenMM
 
 #endif /*OPENMM_PLATFORM_H_*/

olla/src/Platform.cpp

@@ -51,6 +51,9 @@
 using namespace OpenMM;
 using namespace std;
 
+std::vector<std::string> Platform::loadFailures;
+
+
 static int registerPlatforms() {
 
     // Register the Platforms built into the main library.  This should eventually be moved elsewhere.
@@ -140,6 +143,10 @@ Platform& Platform::getPlatform(int index) {
     throw OpenMMException("Invalid platform index");
 }
 
+std::vector<std::string> Platform::getLoadFailures() {
+  return loadFailures;
+}
+
 Platform& Platform::getPlatformByName(const string& name) {
     for (int i = 0; i < getNumPlatforms(); i++)
         if (getPlatform(i).getName() == name)
@@ -196,8 +203,9 @@ static void* loadOneLibrary(const string& file) {
     throw OpenMMException("Loading dynamic libraries is not supported on PNaCl");
 #else    
     void *handle = dlopen(file.c_str(), RTLD_LAZY | RTLD_GLOBAL);
-    if (handle == NULL)
+    if (handle == NULL) {
         throw OpenMMException("Error loading library "+file+": "+dlerror());
+    }
     return handle;
 #endif
 }
@@ -261,12 +269,14 @@ vector<string> Platform::loadPluginsFromDirectory(const string& directory) {
     vector<void*> plugins;
 #endif
     vector<string> loadedLibraries;
+    loadFailures.resize(0);
+
     for (unsigned int i = 0; i < files.size(); ++i) {
         try {
             plugins.push_back(loadOneLibrary(directory+dirSeparator+files[i]));
             loadedLibraries.push_back(files[i]);
         } catch (OpenMMException& ex) {
-            // Just ignore it.
+	    loadFailures.push_back(ex.what());
         }
     }
     initializePlugins(plugins);

wrappers/python/src/swig_doxygen/swigInputConfig.py

@@ -180,6 +180,7 @@ UNITS = {
 ("*", "getParticleMass") : ("unit.amu", ()),
 ("*", "getPlatform") : (None, ()),
 ("*", "getPlatformByName") : (None, ()),
+("*", "getLoadFailures"): (None, ()),
 ("*", "getRandomNumberSeed") : (None, ()),
 ("*", "getReactionFieldDielectric") : (None, ()),
 ("*", "getSoluteDielectric") : (None, ()),