Implemented dynamic loading of platforms from DLLs. Also fixed a lot of...

Implemented dynamic loading of platforms from DLLs.  Also fixed a lot of compilation errors and warnings under Windows.

olla/include/Platform.h

@@ -168,6 +168,19 @@ public:
      * Platform exists which supports all of them, this will throw an exception.
      */
     static Platform& findPlatform(std::vector<std::string> kernelNames);
+    /**
+     * Load a dynamic library (DLL) which contains an OpenMM plugin.  Typically, each Platform
+     * is distributed as a separate dynamic library.  This method can then be called at runtime
+     * to load each available library.  Each library should contain an initializer function to
+     * register any Platforms and KernelFactories that it contains.
+     *
+     * If the file does not exist or cannot be loaded, an exception is thrown.
+     *
+     * @param file   the path to the dynamic library file.  This is interpreted using the operating
+     *               system's rules for loading libraries.  Typically it may be either an absolute path
+     *               or relative to a set of standard locations.
+     */
+    static void loadPluginLibrary(std::string file);
 private:
 
 // Retarded visual studio compiler complains about being unable to 
@@ -180,7 +193,7 @@ private:
 
     std::map<std::string, KernelFactory*> kernelFactories;
     std::map<std::string, StreamFactory*> streamFactories;
-    static std::vector<Platform*> platforms;
+    static std::vector<Platform*>& getPlatforms();
 
 #if defined(_MSC_VER)
 #pragma warning(pop)

olla/include/PlatformException.h → olla/include/PluginInitializer.h

-#ifndef OPENMM_PLATFORMEXCEPTION_H_
-#define OPENMM_PLATFORMEXCEPTION_H_
+#ifndef OPENMM_PLUGININITIALIZER_H_
+#define OPENMM_PLUGININITIALIZER_H_
 
 /* -------------------------------------------------------------------------- *
  *                                   OpenMM                                   *
@@ -32,28 +32,28 @@
  * USE OR OTHER DEALINGS IN THE SOFTWARE.                                     *
  * -------------------------------------------------------------------------- */
 
-#include <exception>
-#include <string>
-
-namespace OpenMM {
-
 /**
- * This class represents an exception thrown by a platform implementation.
+ * This file should be included once in each dynamic library that contains an OpenMM
+ * plugin.  The library should define a function with the signature
+ *
+ * extern "C" void initOpenMMPlugin();
+ *
+ * that registers any Platforms and KernelFactories it contains.  Including this file
+ * will cause that function to be invoked when the library is loaded.
  */
 
-class PlatformException : public std::exception {
-public:
-    PlatformException(std::string message) : message(message) {
-    }
-    ~PlatformException() throw() {
+#if defined(OPENMM_BUILDING_SHARED_LIBRARY)
+    #if defined(WIN32)
+		#include <windows.h>
+        extern "C" void initOpenMMPlugin();
+        BOOL WINAPI DllMain(HANDLE hModule, DWORD  ul_reason_for_call, LPVOID lpReserved) {
+            if (ul_reason_for_call == DLL_PROCESS_ATTACH)
+                initOpenMMPlugin();
+            return TRUE;
         }
-    const char* what() const throw() {
-        return message.c_str();
-    }
-private:
-    std::string message;
-};
-
-} // namespace OpenMM
+    #else
+        extern "C" void __attribute__((constructor)) initOpenMMPlugin();
+    #endif
+#endif
 
-#endif /*OPENMM_PLATFORMEXCEPTION_H_*/
+#endif /*OPENMM_PLUGININITIALIZER_H_*/

olla/src/Platform.cpp

@@ -30,11 +30,17 @@
  * -------------------------------------------------------------------------- */
 
 #include "Platform.h"
-#include "PlatformException.h"
+#include "OpenMMException.h"
 #include "Kernel.h"
 #include "Stream.h"
 #include "KernelFactory.h"
 #include "StreamFactory.h"
+#ifdef WIN32
+#include <windows.h>
+#include <sstream>
+#else
+#include <dlfcn.h>
+#endif
 #include <set>
 
 #include "ReferencePlatform.h"
@@ -42,8 +48,6 @@
 using namespace OpenMM;
 using namespace std;
 
-std::vector<Platform*> Platform::platforms;
-
 static int registerPlatforms() {
 
     // Register the Platforms built into the main library.  This should eventually be moved elsewhere.
@@ -74,47 +78,53 @@ void Platform::contextCreated(OpenMMContextImpl& context) const {
 void Platform::contextDestroyed(OpenMMContextImpl& context) const {
 }
 
-void Platform::registerKernelFactory(std::string name, KernelFactory* factory) {
+void Platform::registerKernelFactory(string name, KernelFactory* factory) {
     kernelFactories[name] = factory;
 }
 
-void Platform::registerStreamFactory(std::string name, StreamFactory* factory) {
+void Platform::registerStreamFactory(string name, StreamFactory* factory) {
     streamFactories[name] = factory;
 }
 
-bool Platform::supportsKernels(std::vector<std::string> kernelNames) const {
+bool Platform::supportsKernels(vector<string> kernelNames) const {
     for (int i = 0; i < (int) kernelNames.size(); ++i)
         if (kernelFactories.find(kernelNames[i]) == kernelFactories.end())
             return false;
     return true;
 }
 
-Kernel Platform::createKernel(std::string name, OpenMMContextImpl& context) const {
+Kernel Platform::createKernel(string name, OpenMMContextImpl& context) const {
     if (kernelFactories.find(name) == kernelFactories.end())
-        throw PlatformException("Called createKernel() on a Platform which does not support the requested kernel");
+        throw OpenMMException("Called createKernel() on a Platform which does not support the requested kernel");
     return Kernel(kernelFactories.find(name)->second->createKernelImpl(name, *this, context));
 }
 
-Stream Platform::createStream(std::string name, int size, Stream::DataType type, OpenMMContextImpl& context) const {
+Stream Platform::createStream(string name, int size, Stream::DataType type, OpenMMContextImpl& context) const {
     if (streamFactories.find(name) == streamFactories.end())
         return Stream(getDefaultStreamFactory().createStreamImpl(name, size, type, *this, context));
     return Stream(streamFactories.find(name)->second->createStreamImpl(name, size, type, *this, context));
 }
 
+vector<Platform*>& Platform::getPlatforms() {
+    static vector<Platform*> platforms;
+    return platforms;
+}
+
 void Platform::registerPlatform(Platform* platform) {
-    platforms.push_back(platform);
+    getPlatforms().push_back(platform);
 }
 
 int Platform::getNumPlatforms() {
-    return platforms.size();
+    return getPlatforms().size();
 }
 
 Platform& Platform::getPlatform(int index) {
-    return *platforms[index];
+    return *getPlatforms()[index];
 }
 
-Platform& Platform::findPlatform(std::vector<std::string> kernelNames) {
+Platform& Platform::findPlatform(vector<string> kernelNames) {
     Platform* best = 0;
+    vector<Platform*>& platforms = getPlatforms();
     double speed = 0.0;
     for (int i = 0; i < (int) platforms.size(); ++i) {
         if (platforms[i]->supportsKernels(kernelNames) && platforms[i]->getSpeed() > speed) {
@@ -123,6 +133,21 @@ Platform& Platform::findPlatform(std::vector<std::string> kernelNames) {
         }
     }
     if (best == 0)
-        throw PlatformException("No Platform supports all the requested kernels");
+        throw OpenMMException("No Platform supports all the requested kernels");
     return *best;
 }
+
+void Platform::loadPluginLibrary(string file) {
+#ifdef WIN32
+    HMODULE handle = LoadLibrary(file.c_str());
+	if (handle == NULL) {
+		string message;
+		stringstream(message) << "Error loading library " << file << ": " << GetLastError();
+        throw OpenMMException(message);
+	}
+#else
+    void *handle = dlopen(file.c_str(), RTLD_LAZY | RTLD_GLOBAL);
+    if (handle == NULL)
+        throw OpenMMException("Error loading library "+file+": "+dlerror());
+#endif
+}

openmmapi/include/AndersenThermostat.h

@@ -48,11 +48,15 @@ public:
      * This is the name of the parameter which stores the current temperature of the
      * heat bath (in Kelvin).
      */
-    static const std::string Temperature;
+    static std::string Temperature() {
+        return "AndersenTemperature";
+    }
     /**
      * This is the name of the parameter which store the current collision frequency (in 1/ps).
      */
-    static const std::string CollisionFrequency;
+    static std::string CollisionFrequency() {
+        return "AndersenCollisionFrequency";
+    }
     /**
      * Create an AndersenThermostat.
      * 

openmmapi/src/AndersenThermostat.cpp

@@ -34,9 +34,6 @@
 
 using namespace OpenMM;
 
-const std::string AndersenThermostat::Temperature = "AndersenTemperature";
-const std::string AndersenThermostat::CollisionFrequency = "AndersenCollisionFrequency";
-
 AndersenThermostat::AndersenThermostat(double defaultTemperature, double defaultCollisionFrequency) :
     defaultTemp(defaultTemperature), defaultFreq(defaultCollisionFrequency) {
 }

openmmapi/src/AndersenThermostatImpl.cpp

@@ -53,8 +53,8 @@ void AndersenThermostatImpl::updateContextState(OpenMMContextImpl& context) {
 
 std::map<std::string, double> AndersenThermostatImpl::getDefaultParameters() {
     std::map<std::string, double> parameters;
-    parameters[AndersenThermostat::Temperature] = getOwner().getDefaultTemperature();
-    parameters[AndersenThermostat::CollisionFrequency] = getOwner().getDefaultCollisionFrequency();
+    parameters[AndersenThermostat::Temperature()] = getOwner().getDefaultTemperature();
+    parameters[AndersenThermostat::CollisionFrequency()] = getOwner().getDefaultCollisionFrequency();
     return parameters;
 }
 

platforms/cuda/src/CudaKernels.cpp

@@ -118,7 +118,7 @@ void CudaCalcHarmonicAngleForceKernel::initialize(const System& system, const Ha
         data.primaryKernel = this;
     data.hasAngles = true;
     numAngles = force.getNumAngles();
-    const float RadiansToDegrees = 180.0/3.14159265;
+    const float RadiansToDegrees = (float) (180.0/3.14159265);
     vector<int> particle1(numAngles);
     vector<int> particle2(numAngles);
     vector<int> particle3(numAngles);
@@ -304,7 +304,7 @@ void CudaCalcGBSAOBCForceKernel::initialize(const System& system, const GBSAOBCF
         radius[i] = (float) particleRadius;
         scale[i] = (float) scalingFactor;
     }
-    gpuSetObcParameters(gpu, force.getSoluteDielectric(), force.getSolventDielectric(), particle, radius, scale);
+    gpuSetObcParameters(gpu, (float) force.getSoluteDielectric(), (float) force.getSolventDielectric(), particle, radius, scale);
     data.useOBC = true;
 }
 
@@ -372,6 +372,7 @@ static void initializeIntegration(const System& system, CudaPlatform::PlatformDa
 }
 
 double CudaCalcGBSAOBCForceKernel::executeEnergy(OpenMMContextImpl& context) {
+	return 0.0;
 }
 
 CudaIntegrateVerletStepKernel::~CudaIntegrateVerletStepKernel() {
@@ -388,7 +389,7 @@ void CudaIntegrateVerletStepKernel::execute(OpenMMContextImpl& context, const Ve
     if (stepSize != prevStepSize) {
         // Initialize the GPU parameters.
         
-        gpuSetVerletIntegrationParameters(gpu, stepSize);
+        gpuSetVerletIntegrationParameters(gpu, (float) stepSize);
         gpuSetConstants(gpu);
         kGenerateRandoms(gpu);
         prevStepSize = stepSize;
@@ -396,7 +397,7 @@ void CudaIntegrateVerletStepKernel::execute(OpenMMContextImpl& context, const Ve
     kVerletUpdatePart1(gpu);
     kApplyFirstShake(gpu);
     if (data.removeCM) {
-        int step = context.getTime()/stepSize;
+        int step = (int) (context.getTime()/stepSize);
         if (step%data.cmMotionFrequency == 0)
             gpu->bCalculateCM = true;
     }
@@ -420,7 +421,7 @@ void CudaIntegrateLangevinStepKernel::execute(OpenMMContextImpl& context, const
         // Initialize the GPU parameters.
         
         double tau = (friction == 0.0 ? 0.0 : 1.0/friction);
-        gpuSetIntegrationParameters(gpu, tau, stepSize, temperature);
+        gpuSetIntegrationParameters(gpu, (float) tau, (float) stepSize, (float) temperature);
         gpuSetConstants(gpu);
         kGenerateRandoms(gpu);
         prevTemp = temperature;
@@ -430,7 +431,7 @@ void CudaIntegrateLangevinStepKernel::execute(OpenMMContextImpl& context, const
     kUpdatePart1(gpu);
     kApplyFirstShake(gpu);
     if (data.removeCM) {
-        int step = context.getTime()/stepSize;
+        int step = (int) (context.getTime()/stepSize);
         if (step%data.cmMotionFrequency == 0)
             gpu->bCalculateCM = true;
     }
@@ -455,7 +456,7 @@ void CudaIntegrateBrownianStepKernel::execute(OpenMMContextImpl& context, const
         // Initialize the GPU parameters.
         
         double tau = (friction == 0.0 ? 0.0 : 1.0/friction);
-        gpuSetBrownianIntegrationParameters(gpu, tau, stepSize, temperature);
+        gpuSetBrownianIntegrationParameters(gpu, (float) tau, (float) stepSize, (float) temperature);
         gpuSetConstants(gpu);
         kGenerateRandoms(gpu);
         prevTemp = temperature;
@@ -465,7 +466,7 @@ void CudaIntegrateBrownianStepKernel::execute(OpenMMContextImpl& context, const
     kBrownianUpdatePart1(gpu);
     kApplyFirstShake(gpu);
     if (data.removeCM) {
-        int step = context.getTime()/stepSize;
+        int step = (int) (context.getTime()/stepSize);
         if (step%data.cmMotionFrequency == 0)
             gpu->bCalculateCM = true;
     }
@@ -481,13 +482,13 @@ void CudaApplyAndersenThermostatKernel::initialize(const System& system, const A
 
 void CudaApplyAndersenThermostatKernel::execute(OpenMMContextImpl& context) {
     _gpuContext* gpu = data.gpu;
-    double temperature = context.getParameter(AndersenThermostat::Temperature);
-    double frequency = context.getParameter(AndersenThermostat::CollisionFrequency);
+    double temperature = context.getParameter(AndersenThermostat::Temperature());
+    double frequency = context.getParameter(AndersenThermostat::CollisionFrequency());
     double stepSize = context.getIntegrator().getStepSize();
     if (temperature != prevTemp || frequency != prevFrequency || stepSize != prevStepSize) {
         // Initialize the GPU parameters.
         
-        gpuSetAndersenThermostatParameters(gpu, temperature, frequency*stepSize);
+        gpuSetAndersenThermostatParameters(gpu, (float) temperature, (float) (frequency*stepSize));
         gpuSetConstants(gpu);
         kGenerateRandoms(gpu);
         prevTemp = temperature;
@@ -500,7 +501,7 @@ void CudaApplyAndersenThermostatKernel::execute(OpenMMContextImpl& context) {
 void CudaCalcKineticEnergyKernel::initialize(const System& system) {
     int numParticles = system.getNumParticles();
     masses.resize(numParticles);
-    for (size_t i = 0; i < numParticles; ++i)
+    for (int i = 0; i < numParticles; ++i)
         masses[i] = system.getParticleMass(i);
 }
 

platforms/cuda/src/CudaPlatform.cpp

@@ -32,12 +32,17 @@
 #include "CudaPlatform.h"
 #include "CudaKernelFactory.h"
 #include "CudaKernels.h"
+#include "PluginInitializer.h"
 #include "internal/OpenMMContextImpl.h"
 #include "kernels/gputypes.h"
 #include "System.h"
 
 using namespace OpenMM;
 
+extern "C" void initOpenMMPlugin() {
+    Platform::registerPlatform(new CudaPlatform());
+}
+
 CudaPlatform::CudaPlatform() {
     CudaKernelFactory* factory = new CudaKernelFactory();
     registerKernelFactory(CalcHarmonicBondForceKernel::Name(), factory);

platforms/cuda/tests/TestCudaBrownianIntegrator.cpp

@@ -121,7 +121,7 @@ void testTemperature() {
     }
     pe /= steps;
     double expected = 0.5*numBonds*BOLTZ*temp;
-    ASSERT_EQUAL_TOL(expected, pe, 20*expected/std::sqrt(steps));
+    ASSERT_EQUAL_TOL(expected, pe, 20*expected/std::sqrt((double) steps));
 }
 
 void testConstraints() {

platforms/reference/src/ReferenceKernels.cpp

@@ -119,8 +119,8 @@ void ReferenceCalcHarmonicBondForceKernel::initialize(const System& system, cons
         force.getBondParameters(i, particle1, particle2, length, k);
         bondIndexArray[i][0] = particle1;
         bondIndexArray[i][1] = particle2;
-        bondParamArray[i][0] = length;
-        bondParamArray[i][1] = k;
+        bondParamArray[i][0] = (RealOpenMM) length;
+        bondParamArray[i][1] = (RealOpenMM) k;
     }
 }
 
@@ -163,8 +163,8 @@ void ReferenceCalcHarmonicAngleForceKernel::initialize(const System& system, con
         angleIndexArray[i][0] = particle1;
         angleIndexArray[i][1] = particle2;
         angleIndexArray[i][2] = particle3;
-        angleParamArray[i][0] = angle;
-        angleParamArray[i][1] = k;
+        angleParamArray[i][0] = (RealOpenMM) angle;
+        angleParamArray[i][1] = (RealOpenMM) k;
     }
 }
 
@@ -208,9 +208,9 @@ void ReferenceCalcPeriodicTorsionForceKernel::initialize(const System& system, c
         torsionIndexArray[i][1] = particle2;
         torsionIndexArray[i][2] = particle3;
         torsionIndexArray[i][3] = particle4;
-        torsionParamArray[i][0] = k;
-        torsionParamArray[i][1] = phase;
-        torsionParamArray[i][2] = periodicity;
+        torsionParamArray[i][0] = (RealOpenMM) k;
+        torsionParamArray[i][1] = (RealOpenMM) phase;
+        torsionParamArray[i][2] = (RealOpenMM) periodicity;
     }
 }
 
@@ -254,12 +254,12 @@ void ReferenceCalcRBTorsionForceKernel::initialize(const System& system, const R
         torsionIndexArray[i][1] = particle2;
         torsionIndexArray[i][2] = particle3;
         torsionIndexArray[i][3] = particle4;
-        torsionParamArray[i][0] = c0;
-        torsionParamArray[i][1] = c1;
-        torsionParamArray[i][2] = c2;
-        torsionParamArray[i][3] = c3;
-        torsionParamArray[i][4] = c4;
-        torsionParamArray[i][5] = c5;
+        torsionParamArray[i][0] = (RealOpenMM) c0;
+        torsionParamArray[i][1] = (RealOpenMM) c1;
+        torsionParamArray[i][2] = (RealOpenMM) c2;
+        torsionParamArray[i][3] = (RealOpenMM) c3;
+        torsionParamArray[i][4] = (RealOpenMM) c4;
+        torsionParamArray[i][5] = (RealOpenMM) c5;
     }
 }
 
@@ -445,7 +445,7 @@ ReferenceIntegrateVerletStepKernel::~ReferenceIntegrateVerletStepKernel() {
 void ReferenceIntegrateVerletStepKernel::initialize(const System& system, const VerletIntegrator& integrator) {
     int numParticles = system.getNumParticles();
     masses = new RealOpenMM[numParticles];
-    for (size_t i = 0; i < numParticles; ++i)
+    for (int i = 0; i < numParticles; ++i)
         masses[i] = static_cast<RealOpenMM>(system.getParticleMass(i));
     numConstraints = system.getNumConstraints();
     constraintIndices = allocateIntArray(numConstraints, 2);
@@ -496,7 +496,7 @@ ReferenceIntegrateLangevinStepKernel::~ReferenceIntegrateLangevinStepKernel() {
 void ReferenceIntegrateLangevinStepKernel::initialize(const System& system, const LangevinIntegrator& integrator) {
     int numParticles = system.getNumParticles();
     masses = new RealOpenMM[numParticles];
-    for (size_t i = 0; i < numParticles; ++i)
+    for (int i = 0; i < numParticles; ++i)
         masses[i] = static_cast<RealOpenMM>(system.getParticleMass(i));
     numConstraints = system.getNumConstraints();
     constraintIndices = allocateIntArray(numConstraints, 2);
@@ -556,7 +556,7 @@ ReferenceIntegrateBrownianStepKernel::~ReferenceIntegrateBrownianStepKernel() {
 void ReferenceIntegrateBrownianStepKernel::initialize(const System& system, const BrownianIntegrator& integrator) {
     int numParticles = system.getNumParticles();
     masses = new RealOpenMM[numParticles];
-    for (size_t i = 0; i < numParticles; ++i)
+    for (int i = 0; i < numParticles; ++i)
         masses[i] = static_cast<RealOpenMM>(system.getParticleMass(i));
     numConstraints = system.getNumConstraints();
     constraintIndices = allocateIntArray(numConstraints, 2);
@@ -609,7 +609,7 @@ ReferenceApplyAndersenThermostatKernel::~ReferenceApplyAndersenThermostatKernel(
 void ReferenceApplyAndersenThermostatKernel::initialize(const System& system, const AndersenThermostat& thermostat) {
     int numParticles = system.getNumParticles();
     masses = new RealOpenMM[numParticles];
-    for (size_t i = 0; i < numParticles; ++i)
+    for (int i = 0; i < numParticles; ++i)
         masses[i] = static_cast<RealOpenMM>(system.getParticleMass(i));
     this->thermostat = new ReferenceAndersenThermostat();
 }
@@ -620,15 +620,15 @@ void ReferenceApplyAndersenThermostatKernel::execute(OpenMMContextImpl& context)
 			context.getVelocities().getSize(), 
 			velData, 
 			masses, 
-			static_cast<RealOpenMM>(context.getParameter(AndersenThermostat::Temperature)), 
-			static_cast<RealOpenMM>(context.getParameter(AndersenThermostat::CollisionFrequency)), 
+			static_cast<RealOpenMM>(context.getParameter(AndersenThermostat::Temperature())), 
+			static_cast<RealOpenMM>(context.getParameter(AndersenThermostat::CollisionFrequency())), 
 			static_cast<RealOpenMM>(context.getIntegrator().getStepSize()) );
 }
 
 void ReferenceCalcKineticEnergyKernel::initialize(const System& system) {
     int numParticles = system.getNumParticles();
     masses.resize(numParticles);
-    for (size_t i = 0; i < numParticles; ++i)
+    for (int i = 0; i < numParticles; ++i)
         masses[i] = system.getParticleMass(i);
 }
 

platforms/reference/tests/TestReferenceBrownianIntegrator.cpp

@@ -119,7 +119,7 @@ void testTemperature() {
     }
     pe /= steps;
     double expected = 0.5*numBonds*BOLTZ*temp;
-    ASSERT_EQUAL_TOL(expected, pe, 20*expected/std::sqrt(steps));
+    ASSERT_EQUAL_TOL(expected, pe, 20*expected/std::sqrt((double) steps));
 }
 
 void testConstraints() {