You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
96 lines
2.7 KiB
96 lines
2.7 KiB
/*
|
|
* Copyright (C) 2007 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#include <cutils/native_handle.h>
|
|
|
|
#include <errno.h>
|
|
#include <stdint.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
native_handle_t* native_handle_init(char* storage, int numFds, int numInts) {
|
|
if ((uintptr_t) storage % alignof(native_handle_t)) {
|
|
errno = EINVAL;
|
|
return NULL;
|
|
}
|
|
|
|
native_handle_t* handle = (native_handle_t*) storage;
|
|
handle->version = sizeof(native_handle_t);
|
|
handle->numFds = numFds;
|
|
handle->numInts = numInts;
|
|
return handle;
|
|
}
|
|
|
|
native_handle_t* native_handle_create(int numFds, int numInts) {
|
|
if (numFds < 0 || numInts < 0 || numFds > NATIVE_HANDLE_MAX_FDS ||
|
|
numInts > NATIVE_HANDLE_MAX_INTS) {
|
|
errno = EINVAL;
|
|
return NULL;
|
|
}
|
|
|
|
size_t mallocSize = sizeof(native_handle_t) + (sizeof(int) * (numFds + numInts));
|
|
native_handle_t* h = static_cast<native_handle_t*>(malloc(mallocSize));
|
|
if (h) {
|
|
h->version = sizeof(native_handle_t);
|
|
h->numFds = numFds;
|
|
h->numInts = numInts;
|
|
}
|
|
return h;
|
|
}
|
|
|
|
native_handle_t* native_handle_clone(const native_handle_t* handle) {
|
|
native_handle_t* clone = native_handle_create(handle->numFds, handle->numInts);
|
|
if (clone == NULL) return NULL;
|
|
|
|
for (int i = 0; i < handle->numFds; i++) {
|
|
clone->data[i] = dup(handle->data[i]);
|
|
if (clone->data[i] == -1) {
|
|
clone->numFds = i;
|
|
native_handle_close(clone);
|
|
native_handle_delete(clone);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
memcpy(&clone->data[handle->numFds], &handle->data[handle->numFds],
|
|
sizeof(int) * handle->numInts);
|
|
|
|
return clone;
|
|
}
|
|
|
|
int native_handle_delete(native_handle_t* h) {
|
|
if (h) {
|
|
if (h->version != sizeof(native_handle_t)) return -EINVAL;
|
|
free(h);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int native_handle_close(const native_handle_t* h) {
|
|
if (!h) return 0;
|
|
|
|
if (h->version != sizeof(native_handle_t)) return -EINVAL;
|
|
|
|
int saved_errno = errno;
|
|
const int numFds = h->numFds;
|
|
for (int i = 0; i < numFds; ++i) {
|
|
close(h->data[i]);
|
|
}
|
|
errno = saved_errno;
|
|
return 0;
|
|
}
|