1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#define LOG_TAG "NativeHandle"
18
19#include <stdint.h>
20#include <errno.h>
21#include <string.h>
22#include <stdlib.h>
23#include <unistd.h>
24
25#include <cutils/log.h>
26#include <cutils/native_handle.h>
27
28static const int kMaxNativeFds = 1024;
29static const int kMaxNativeInts = 1024;
30
31native_handle_t* native_handle_create(int numFds, int numInts)
32{
33    if (numFds < 0 || numInts < 0 || numFds > kMaxNativeFds || numInts > kMaxNativeInts) {
34        return NULL;
35    }
36
37    size_t mallocSize = sizeof(native_handle_t) + (sizeof(int) * (numFds + numInts));
38    native_handle_t* h = malloc(mallocSize);
39    if (h) {
40        h->version = sizeof(native_handle_t);
41        h->numFds = numFds;
42        h->numInts = numInts;
43    }
44    return h;
45}
46
47int native_handle_delete(native_handle_t* h)
48{
49    if (h) {
50        if (h->version != sizeof(native_handle_t))
51            return -EINVAL;
52        free(h);
53    }
54    return 0;
55}
56
57int native_handle_close(const native_handle_t* h)
58{
59    if (h->version != sizeof(native_handle_t))
60        return -EINVAL;
61
62    const int numFds = h->numFds;
63    int i;
64    for (i=0 ; i<numFds ; i++) {
65        close(h->data[i]);
66    }
67    return 0;
68}
69