| /* |
| * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package com.apple.jobjc; |
| |
| import java.nio.ByteOrder; |
| |
| import com.apple.jobjc.Coder.PrimitivePointerCoder; |
| |
| |
| public final class NativeArgumentBuffer{ |
| private static final ThreadLocal<NativeArgumentBuffer> threadLocal = new ThreadLocal<NativeArgumentBuffer>(); |
| |
| static NativeArgumentBuffer getThreadLocalBuffer(final JObjCRuntime runtime) { |
| runtime.assertOK(); |
| final NativeArgumentBuffer alreadyCreated = threadLocal.get(); |
| if (alreadyCreated != null) return alreadyCreated; |
| |
| final NativeArgumentBuffer newThreadLocalState = new NativeArgumentBuffer(runtime); |
| threadLocal.set(newThreadLocalState); |
| return newThreadLocalState; |
| } |
| |
| final JObjCRuntime runtime; |
| |
| final NativeBuffer buffer; |
| |
| long argPtrsPtr; |
| long argValuesPtr; |
| final long retValPtr; |
| |
| private static final int MAX_ARGS = 512; |
| private static final int BUF_SIZE = MAX_ARGS * 8 * 2; |
| private static final int ARG_VALS_OFFSET = BUF_SIZE/2; |
| |
| private NativeArgumentBuffer(final JObjCRuntime runtime) { |
| runtime.assertOK(); |
| this.runtime = runtime; |
| this.buffer = new NativeBuffer(BUF_SIZE); |
| this.buffer.buffer.order(ByteOrder.nativeOrder()); |
| |
| reset(); |
| this.retValPtr = buffer.bufferPtr; |
| } |
| |
| |
| // Call before each new call |
| public void reset() { |
| argPtrsPtr = buffer.bufferPtr; |
| argValuesPtr = buffer.bufferPtr + ARG_VALS_OFFSET; |
| assert buffer.ptrInBounds(argValuesPtr); |
| } |
| |
| // Push a pointer to a block of memory |
| public void doPutArgPtr(long ptr) { |
| assert buffer.ptrInBounds(argPtrsPtr); |
| PrimitivePointerCoder.INST.push(runtime, argPtrsPtr, ptr); |
| argPtrsPtr += JObjCRuntime.PTR_LEN; |
| } |
| |
| // Call this after having written a value of size `sizeof` to `argValuesPtr`. |
| public void didPutArgValue(int sizeof) { |
| assert buffer.ptrInBounds(argValuesPtr); |
| doPutArgPtr(argValuesPtr); |
| argValuesPtr += sizeof; |
| } |
| |
| |
| @Override public String toString() { |
| final StringBuilder builder = new StringBuilder(); |
| final long bptr = buffer.bufferPtr; |
| |
| for(long i = bptr; i < bptr + ARG_VALS_OFFSET; i += JObjCRuntime.PTR_LEN){ |
| if(argPtrsPtr == i) |
| builder.append("*"); |
| builder.append(PrimitivePointerCoder.INST.popPtr(JObjCRuntime.inst(), i)); |
| builder.append(" "); |
| } |
| |
| builder.append("\n"); |
| |
| for(long i = bptr + ARG_VALS_OFFSET; i < bptr + BUF_SIZE; i += JObjCRuntime.PTR_LEN){ |
| if(argValuesPtr == i) |
| builder.append("*"); |
| builder.append(PrimitivePointerCoder.INST.popPtr(JObjCRuntime.inst(), i)); |
| builder.append(" "); |
| } |
| |
| return builder.toString(); |
| } |
| } |