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From mt...@apache.org
Subject svn commit: r646212 - in /tomcat/connectors/trunk/jni: java/org/apache/tomcat/jni/Buffer.java native/src/bb.c
Date Wed, 09 Apr 2008 07:51:01 GMT
Author: mturk
Date: Wed Apr  9 00:50:52 2008
New Revision: 646212

URL: http://svn.apache.org/viewvc?rev=646212&view=rev
Log:
Add Buffer class for allocating ByteBuffers directly from the memory

Added:
    tomcat/connectors/trunk/jni/java/org/apache/tomcat/jni/Buffer.java   (with props)
    tomcat/connectors/trunk/jni/native/src/bb.c   (with props)

Added: tomcat/connectors/trunk/jni/java/org/apache/tomcat/jni/Buffer.java
URL: http://svn.apache.org/viewvc/tomcat/connectors/trunk/jni/java/org/apache/tomcat/jni/Buffer.java?rev=646212&view=auto
==============================================================================
--- tomcat/connectors/trunk/jni/java/org/apache/tomcat/jni/Buffer.java (added)
+++ tomcat/connectors/trunk/jni/java/org/apache/tomcat/jni/Buffer.java Wed Apr  9 00:50:52
2008
@@ -0,0 +1,91 @@
+/*
+ *  Licensed to the Apache Software Foundation (ASF) under one or more
+ *  contributor license agreements.  See the NOTICE file distributed with
+ *  this work for additional information regarding copyright ownership.
+ *  The ASF licenses this file to You under the Apache License, Version 2.0
+ *  (the "License"); you may not use this file except in compliance with
+ *  the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package org.apache.tomcat.jni;
+
+import java.nio.ByteBuffer;
+
+/** Buffer
+ *
+ * @author Mladen Turk
+ * @version $Revision: $, $Date: $
+ */
+
+public class Buffer {
+
+    /**
+     * Allocate a new ByteBuffer from memory
+     * @param size The amount of memory to allocate
+     * @return The ByteBuffer with allocated memory
+     */
+    public static native ByteBuffer alloc(int size);
+
+    /**
+     * Allocate a new ByteBuffer from memory and set all of the memory to 0
+     * @param num Number of elements.
+     * @param size Length in bytes of each element.
+     * @return The ByteBuffer with allocated memory
+     */
+    public static native ByteBuffer calloc(int num, int size);
+
+    /**
+     * Allocate a new ByteBuffer from a pool
+     * @param p The pool to allocate from
+     * @param size The amount of memory to allocate
+     * @return The ByteBuffer with allocated memory
+     */
+    public static native ByteBuffer palloc(long p, int size);
+
+    /**
+     * Allocate a new ByteBuffer from a pool and set all of the memory to 0
+     * @param p The pool to allocate from
+     * @param size The amount of memory to allocate
+     * @return The ByteBuffer with allocated memory
+     */
+    public static native ByteBuffer pcalloc(long p, int size);
+
+    /**
+     * Allocate a new ByteBuffer from already allocated memory.
+     * <br />Allocated memory must be provided from call to the
+     * Stdlib.alloc or Stdlib.calloc methods.
+     * @param mem The memory to use
+     * @param size The amount of memory to use
+     * @return The ByteBuffer with attached memory
+     */
+    public static native ByteBuffer create(long mem, int size);
+
+    /**
+     * Deallocates or frees a memory block used by ByteBuffer
+     * <br /><b>Warning :</b> Call this method only on ByteBuffers
+     * that were created by calling Buffer.alloc or Buffer.calloc.
+     * @param buf Previously allocated ByteBuffer to be freed.
+     */
+    public static native void free(ByteBuffer buf);
+
+    /**
+     * Returns the memory address of the ByteBuffer.
+     * @param buf Previously allocated ByteBuffer.
+     */
+    public static native long address(ByteBuffer buf);
+
+    /**
+     * Returns the allocated memory size of the ByteBuffer.
+     * @param buf Previously allocated ByteBuffer.
+     */
+    public static native int size(ByteBuffer buf);
+
+}

Propchange: tomcat/connectors/trunk/jni/java/org/apache/tomcat/jni/Buffer.java
------------------------------------------------------------------------------
    svn:eol-style = native

Added: tomcat/connectors/trunk/jni/native/src/bb.c
URL: http://svn.apache.org/viewvc/tomcat/connectors/trunk/jni/native/src/bb.c?rev=646212&view=auto
==============================================================================
--- tomcat/connectors/trunk/jni/native/src/bb.c (added)
+++ tomcat/connectors/trunk/jni/native/src/bb.c Wed Apr  9 00:50:52 2008
@@ -0,0 +1,134 @@
+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*
+ *
+ * @author Mladen Turk
+ * @version $Revision: $, $Date: $
+ */
+
+#include "tcn.h"
+
+/**
+ * DirectByteBuffer utilities
+ */
+
+TCN_IMPLEMENT_CALL(jobject, Buffer, malloc)(TCN_STDARGS, jint size)
+{
+    void *mem;
+    size_t sz = (size_t)APR_ALIGN_DEFAULT(size);
+
+    UNREFERENCED(o);
+
+    if ((mem = malloc(sz)) != NULL) {
+        jobject rv = (*e)->NewDirectByteBuffer(e, mem, (jlong)sz);
+        if (rv == NULL)
+            free(mem);
+        return rv;
+    }
+    else {
+        return NULL;
+    }
+}
+
+TCN_IMPLEMENT_CALL(jobject, Buffer, calloc)(TCN_STDARGS, jint num, jint size)
+{
+    size_t sz = (size_t)APR_ALIGN_DEFAULT((size * num));
+
+    UNREFERENCED(o);
+
+    if ((mem = calloc(1, sz)) != NULL) {
+        jobject rv = (*e)->NewDirectByteBuffer(e, mem, (jlong)sz);
+        if (rv == NULL)
+            free(mem);
+        return rv;
+    }
+    else {
+        return NULL;
+    }
+}
+
+TCN_IMPLEMENT_CALL(jobject, Buffer, palloc)(TCN_STDARGS, jlong pool,
+                                            jint size)
+{
+    apr_pool_t *p = J2P(pool, apr_pool_t *);
+    apr_size_t sz = (apr_size_t)APR_ALIGN_DEFAULT(size);
+    void *mem;
+
+    UNREFERENCED(o);
+    TCN_ASSERT(pool != 0);
+
+    if ((mem = apr_palloc(p, sz)) != NULL)
+        return (*e)->NewDirectByteBuffer(e, mem, (jlong)sz);
+    else
+        return NULL;
+}
+
+TCN_IMPLEMENT_CALL(jobject, Buffer, pcalloc)(TCN_STDARGS, jlong pool,
+                                             jint size)
+{
+    apr_pool_t *p = J2P(pool, apr_pool_t *);
+    apr_size_t sz = (apr_size_t)APR_ALIGN_DEFAULT(size);
+    void *mem;
+
+    UNREFERENCED(o);
+    TCN_ASSERT(pool != 0);
+
+    if ((mem = apr_pcalloc(p, sz)) != NULL)
+        return (*e)->NewDirectByteBuffer(e, mem, (jlong)sz);
+    else
+        return NULL;
+}
+
+TCN_IMPLEMENT_CALL(jobject, Buffer, create)(TCN_STDARGS, jlong addr,
+                                            jint size)
+{
+    void *mem = J2P(addr, void *);
+
+    UNREFERENCED(o);
+    TCN_ASSERT(mem  != 0);
+    TCN_ASSERT(size != 0);
+
+    if (mem && size)
+        return (*e)->NewDirectByteBuffer(e, mem, (jlong)size);
+    else
+        return NULL;
+}
+
+TCN_IMPLEMENT_CALL(void, Buffer, free)(TCN_STDARGS, jobject bb)
+{
+    void *mem;
+
+    UNREFERENCED(o);
+    if ((mem = (*e)->GetDirectBufferAddress(e, bb)) != NULL) {
+        /* This can cause core dump if address was
+         * allocated from the APR pool.
+         */
+        free(mem);
+    }
+}
+
+TCN_IMPLEMENT_CALL(jlong, Buffer, address)(TCN_STDARGS, jobject bb)
+{
+    UNREFERENCED(o);
+    return P2J((*e)->GetDirectBufferAddress(e, bb));
+}
+
+TCN_IMPLEMENT_CALL(jlong, Buffer, size)(TCN_STDARGS, jobject bb)
+{
+    UNREFERENCED(o);
+    return (*e)->GetDirectBufferCapacity(e, bb);
+}

Propchange: tomcat/connectors/trunk/jni/native/src/bb.c
------------------------------------------------------------------------------
    svn:eol-style = native



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