native_handle.c revision 3fc51ba17d33c38d327d875d973e787b4dd076b6 
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    h->version = sizeof(native_handle_t);
34    h->numFds = numFds;
35    h->numInts = numInts;
36    return h;
37}
38
39int native_handle_delete(native_handle_t* h)
40{
41    if (h) {
42        if (h->version != sizeof(native_handle_t))
43            return -EINVAL;
44        free(h);
45    }
46    return 0;
47}
48
49int native_handle_close(const native_handle_t* h)
50{
51    if (h->version != sizeof(native_handle_t))
52        return -EINVAL;
53
54    const int numFds = h->numFds;
55    int i;
56    for (i=0 ; i<numFds ; i++) {
57        close(h->data[i]);
58    }
59    return 0;
60}
61