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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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