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| 1 /* | |
| 2 * Licensed to the Apache Software Foundation (ASF) under one or more | |
| 3 * contributor license agreements. See the NOTICE file distributed with | |
| 4 * this work for additional information regarding copyright ownership. | |
| 5 * The ASF licenses this file to You under the Apache License, Version 2.0 | |
| 6 * (the "License"); you may not use this file except in compliance with | |
| 7 * the License. You may obtain a copy of the License at | |
| 8 * | |
| 9 * http://www.apache.org/licenses/LICENSE-2.0 | |
| 10 * | |
| 11 * Unless required by applicable law or agreed to in writing, software | |
| 12 * distributed under the License is distributed on an "AS IS" BASIS, | |
| 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 14 * See the License for the specific language governing permissions and | |
| 15 * limitations under the License. | |
| 16 */ | |
| 17 | |
| 18 package org.apache.tomcat.jni; | |
| 19 | |
| 20 /** Stdlib | |
| 21 * | |
| 22 * @author Mladen Turk | |
| 23 */ | |
| 24 public class Stdlib { | |
| 25 | |
| 26 /** | |
| 27 * Read from plain memory | |
| 28 * @param dst Destination byte array | |
| 29 * @param src Source memory address | |
| 30 * @param sz Number of bytes to copy. | |
| 31 */ | |
| 32 public static native boolean memread(byte [] dst, long src, int sz); | |
| 33 | |
| 34 /** | |
| 35 * Write to plain memory | |
| 36 * @param dst Destination memory address | |
| 37 * @param src Source byte array | |
| 38 * @param sz Number of bytes to copy. | |
| 39 */ | |
| 40 public static native boolean memwrite(long dst, byte [] src, int sz); | |
| 41 | |
| 42 /** | |
| 43 * Sets buffers to a specified character | |
| 44 * @param dst Destination memory address | |
| 45 * @param c Character to set. | |
| 46 * @param sz Number of characters. | |
| 47 */ | |
| 48 public static native boolean memset(long dst, int c, int sz); | |
| 49 | |
| 50 /** | |
| 51 * Allocates memory blocks. | |
| 52 * @param sz Bytes to allocate. | |
| 53 */ | |
| 54 public static native long malloc(int sz); | |
| 55 | |
| 56 /** | |
| 57 * Reallocate memory blocks. | |
| 58 * @param mem Pointer to previously allocated memory block. | |
| 59 * @param sz New size in bytes. | |
| 60 */ | |
| 61 public static native long realloc(long mem, int sz); | |
| 62 | |
| 63 /** | |
| 64 * Allocates an array in memory with elements initialized to 0. | |
| 65 * @param num Number of elements. | |
| 66 * @param sz Length in bytes of each element. | |
| 67 */ | |
| 68 public static native long calloc(int num, int sz); | |
| 69 | |
| 70 /** | |
| 71 * Deallocates or frees a memory block. | |
| 72 * @param mem Previously allocated memory block to be freed. | |
| 73 */ | |
| 74 public static native void free(long mem); | |
| 75 | |
| 76 /** | |
| 77 * Get current process pid. | |
| 78 * @return current pid or < 1 in case of error. | |
| 79 */ | |
| 80 public static native int getpid(); | |
| 81 | |
| 82 /** | |
| 83 * Get current process parent pid. | |
| 84 * @return parent pid or < 1 in case of error. | |
| 85 */ | |
| 86 public static native int getppid(); | |
| 87 | |
| 88 } | |
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