native_handle.c revision 2b8852dececd0ff681e08fe2127d3defb4f73578 
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
28native_handle_t* native_handle_create(int numFds, int numInts)
29{
30    native_handle_t* h = malloc(
31            sizeof(native_handle_t) + sizeof(int)*(numFds+numInts));
32
33    if (h) {
34        h->version = sizeof(native_handle_t);
35        h->numFds = numFds;
36        h->numInts = numInts;
37    }
38    return h;
39}
40
41int native_handle_delete(native_handle_t* h)
42{
43    if (h) {
44        if (h->version != sizeof(native_handle_t))
45            return -EINVAL;
46        free(h);
47    }
48    return 0;
49}
50
51int native_handle_close(const native_handle_t* h)
52{
53    if (h->version != sizeof(native_handle_t))
54        return -EINVAL;
55
56    const int numFds = h->numFds;
57    int i;
58    for (i=0 ; i<numFds ; i++) {
59        close(h->data[i]);
60    }
61    return 0;
62}
63