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/*
* JCuda - Java bindings for NVIDIA CUDA driver and runtime API
*
* Copyright (c) 2009-2015 Marco Hutter - http://www.jcuda.org
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#include
#include "Logger.hpp"
#include "JNIUtils.hpp"
#include "PointerUtils.hpp"
jmethodID Object_getClass; // ()Ljava/lang/Class;
jmethodID Class_getComponentType; // ()Ljava/lang/Class;
jmethodID Class_newInstance; // ()Ljava/lang/Object;
jmethodID Buffer_isDirect; // ()Z
jmethodID Buffer_hasArray; // ()Z
jmethodID Buffer_array; // ()Ljava/lang/Object;
jfieldID NativePointerObject_nativePointer; // long
jclass Pointer_class; // Global reference to jcuda/Pointer class
jfieldID Pointer_buffer; // Ljava.nio.Buffer;
jfieldID Pointer_pointers; // [jcuda.NativePointerObject;
jfieldID Pointer_byteOffset; // long
/**
* Initialize the field- and method IDs for the PointerUtils
*/
int initPointerUtils(JNIEnv *env)
{
jclass cls = NULL;
// Obtain the methodID for Object#getClass
if (!init(env, cls, "java/lang/Object")) return JNI_ERR;
if (!init(env, cls, Object_getClass, "getClass", "()Ljava/lang/Class;")) return JNI_ERR;
// Obtain the methodID for Class#getComponentType
if (!init(env, cls, "java/lang/Class")) return JNI_ERR;
if (!init(env, cls, Class_getComponentType, "getComponentType", "()Ljava/lang/Class;")) return JNI_ERR;
if (!init(env, cls, Class_newInstance, "newInstance", "()Ljava/lang/Object;")) return JNI_ERR;
// Obtain the methodIDs for Buffer: isDirect, hasArray and array
if (!init(env, cls, "java/nio/Buffer")) return JNI_ERR;
if (!init(env, cls, Buffer_isDirect, "isDirect", "()Z" )) return JNI_ERR;
if (!init(env, cls, Buffer_hasArray, "hasArray", "()Z" )) return JNI_ERR;
if (!init(env, cls, Buffer_array, "array", "()Ljava/lang/Object;")) return JNI_ERR;
// Obtain the fieldIDs of the NativePointerObject class
if (!init(env, cls, "jcuda/NativePointerObject")) return JNI_ERR;
if (!init(env, cls, NativePointerObject_nativePointer, "nativePointer", "J")) return JNI_ERR;
// Obtain the fieldIDs of the Pointer class
if (!init(env, cls, "jcuda/Pointer")) return JNI_ERR;
Pointer_class = (jclass)env->NewGlobalRef(cls);
if (Pointer_class == NULL)
{
return JNI_ERR;
}
if (!init(env, cls, Pointer_buffer, "buffer", "Ljava/nio/Buffer;" )) return JNI_ERR;
if (!init(env, cls, Pointer_pointers, "pointers", "[Ljcuda/NativePointerObject;" )) return JNI_ERR;
if (!init(env, cls, Pointer_byteOffset, "byteOffset", "J" )) return JNI_ERR;
return JNI_VERSION_1_4;
}
/**
* If the given PointerData is NULL, an OutOfMemoryError is thrown
* and NULL is returned.
* Otherwise, this function tries to initialize the PointerData with
* the given Java NativePointerObject. If the initialization fails,
* the PointerData is deleted and NULL is returned.
* Otherwise, the initialized pointer data is returned.
*/
PointerData *validatePointerData(JNIEnv *env, jobject nativePointerObject, PointerData *pointerData)
{
if (pointerData == NULL)
{
ThrowByName(env, "java/lang/OutOfMemoryError",
"Out of memory while creating pointer data");
return NULL;
}
if (!pointerData->init(env, nativePointerObject))
{
delete pointerData;
return NULL;
}
return pointerData;
}
/**
* Initializes a PointerData with the data from the given
* Java NativePointerObject.
*
* This will return an implementation of the PointerData
* class, depending on the type of the given Java object:
*
* - If the given object is 'NULL' or is NO Java Pointer
* (but only a NativePointerObject)
* then a NativePointerObjectPointerData is returned
*
* Otherwise the given object is a valid Java Pointer object.
*
* - If the 'pointers' array of the given Pointer object is non-NULL,
* then a PointersArrayPointerData is returned
*
* - If the 'buffer' of the given Pointer is non-NULL, then
* a PointerData object will be returned depending on
* the properties of the buffer:
* - If the buffer is direct, then a DirectBufferPointerData is returned
* - If the buffer has an array, then a ArrayBufferPointerData is returned
*
* - Otherwise, a NativePointerData will be returned, which has its
* nativePointer value and byteOffset set according to the values
* in the given Pointer
*
* In any case, if an Exception occurs or the initialization of
* the PointerData fails, then NULL is returned.
*/
PointerData* initPointerData(JNIEnv *env, jobject nativePointerObject)
{
Logger::log(LOG_DEBUGTRACE, "Initializing pointer data for Java NativePointerObject %p\n", nativePointerObject);
// If the given object is 'NULL', then return a NativePointerObjectPointerData
if (nativePointerObject == NULL)
{
Logger::log(LOG_DEBUGTRACE, "Initializing NativePointerObjectPointerData\n");
NativePointerObjectPointerData *pointerData = new NativePointerObjectPointerData();
return validatePointerData(env, nativePointerObject, pointerData);
}
// If the object is no Pointer (but only a NativePointerObject),
// then return a NativePointerObjectPointerData
jboolean isPointer = env->IsInstanceOf(nativePointerObject, Pointer_class);
if (!isPointer)
{
Logger::log(LOG_DEBUGTRACE, "Initializing NativePointerObjectPointerData\n");
NativePointerObjectPointerData *pointerData = new NativePointerObjectPointerData();
return validatePointerData(env, nativePointerObject, pointerData);
}
// If the Pointer contains a 'pointers' array, then return
// a PointersArrayPointerData
jobjectArray pointersArray = (jobjectArray)env->GetObjectField(nativePointerObject, Pointer_pointers);
if (pointersArray != NULL)
{
Logger::log(LOG_DEBUGTRACE, "Initializing PointersArrayPointerData\n");
PointersArrayPointerData *pointerData = new PointersArrayPointerData();
return validatePointerData(env, nativePointerObject, pointerData);
}
// Check if the Pointer contains a buffer
jobject buffer = env->GetObjectField(nativePointerObject, Pointer_buffer);
if (buffer != NULL)
{
// If the buffer is direct, return a DirectBufferPointerData
jboolean isDirect = env->CallBooleanMethod(buffer, Buffer_isDirect);
if (env->ExceptionCheck())
{
return NULL;
}
if (isDirect==JNI_TRUE)
{
Logger::log(LOG_DEBUGTRACE, "Initializing DirectBufferPointerData for\n");
DirectBufferPointerData *pointerData = new DirectBufferPointerData();
return validatePointerData(env, nativePointerObject, pointerData);
}
// If the buffer has an array, return a ArrayBufferPointerData
jboolean hasArray = env->CallBooleanMethod(buffer, Buffer_hasArray);
if (env->ExceptionCheck())
{
return NULL;
}
if (hasArray==JNI_TRUE)
{
Logger::log(LOG_DEBUGTRACE, "Initializing ArrayBufferPointerData\n");
ArrayBufferPointerData *pointerData = new ArrayBufferPointerData();
return validatePointerData(env, nativePointerObject, pointerData);
}
// The buffer is neither direct nor has an array - should have
// been checked on Java side
Logger::log(LOG_ERROR, "Buffer is neither direct nor has an array\n");
ThrowByName(env, "java/lang/IllegalArgumentException",
"Buffer is neither direct nor has an array");
return NULL;
}
// At this point, the given object must be a Pointer, containing
// a (possibly NULL) nativePointer and a (possibly 0) byteOffset
Logger::log(LOG_DEBUGTRACE, "Initializing NativePointerData\n");
NativePointerData *pointerData = new NativePointerData();
return validatePointerData(env, nativePointerObject, pointerData);
}
/**
* Releases the given PointerData by calling PointerData::release,
* and deletes the PointerData object.
*
* The effect of the PointerData::release method is depending on
* the type of the pointerData:
*
* - For a NativePointerData, nothing has to be done
* - For a PointersArrayPointerData
* - For a DirectBufferPointerData, nothing has to be done
* - For a ArrayBufferPointerData, the primitve array is released
* using the given mode (JNI_COMMIT, JNI_ABORT or 0)
*
* If the given PointerData is NULL, then nothing is done.
*
* The method returns whether the respective operation succeeded.
*/
bool releasePointerData(JNIEnv *env, PointerData* &pointerData, jint mode)
{
if (pointerData == NULL) return true;
if (!pointerData->release(env, mode)) return false;
delete pointerData;
pointerData = NULL;
return true;
}
/**
* Returns whether the given buffer is a direct byte buffer
*/
bool isDirectByteBuffer(JNIEnv *env, jobject buffer)
{
if (buffer == NULL)
{
return false;
}
jboolean isDirect = env->CallBooleanMethod(buffer, Buffer_isDirect);
if (env->ExceptionCheck())
{
return false;
}
if (isDirect == JNI_TRUE)
{
return true;
}
return false;
}
/**
* Returns whether the given pointer object is either a pointer
* with a nativePointer value that is not null, or a pointer to
* a direct ByteBuffer
*/
bool isPointerBackedByNativeMemory(JNIEnv *env, jobject object)
{
if (object == NULL)
{
return false;
}
jlong nativePointer = env->GetLongField(object, NativePointerObject_nativePointer);
if (nativePointer != 0)
{
return true;
}
jboolean isPointer = env->IsInstanceOf(object, Pointer_class);
if (isPointer)
{
jobject buffer = env->GetObjectField(object, Pointer_buffer);
return isDirectByteBuffer(env, buffer);
}
return false;
}
/**
* Set the nativePointer in the given Java NativePointerObject to the given
* pointer.
*/
void setNativePointerValue(JNIEnv *env, jobject nativePointerObject, jlong pointer)
{
if (nativePointerObject == NULL)
{
return;
}
env->SetLongField(nativePointerObject, NativePointerObject_nativePointer, pointer);
}
/**
* Returns the nativePointer of the given
* Java NativePointerObject
*/
void* getNativePointerValue(JNIEnv *env, jobject nativePointerObject)
{
if (nativePointerObject == NULL)
{
return NULL;
}
jlong pointer = env->GetLongField(nativePointerObject, NativePointerObject_nativePointer);
return (void*)pointer;
}
/**
* Set the nativePointer in the given Java Pointer object to the given
* pointer. The byteOffset will be set to 0.
*/
void setPointer(JNIEnv *env, jobject pointerObject, jlong pointer)
{
if (pointerObject == NULL)
{
return;
}
env->SetLongField(pointerObject, NativePointerObject_nativePointer, pointer);
env->SetLongField(pointerObject, Pointer_byteOffset, 0);
}
/**
* Returns the native pointer that is described by the given
* Java Pointer object, i.e. its nativePointer plus its
* byteOffset.
*/
void* getPointer(JNIEnv *env, jobject pointerObject)
{
if (pointerObject == NULL)
{
return NULL;
}
jlong startPointer = env->GetLongField(pointerObject, NativePointerObject_nativePointer);
jlong byteOffset = env->GetLongField(pointerObject, Pointer_byteOffset);
jlong pointer = startPointer+byteOffset;
return (void*)pointer;
}
