1 /*
2  * Copyright (C) 2019 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 #ifndef SYS_SENDFILE_H
18 #define SYS_SENDFILE_H
19 
20 #include <sys/cdefs.h>
21 #include <sys/types.h>
22 
23 __BEGIN_DECLS
24 
25 /*
26  * sendfile() here is a relatively straightforward implementation, but
27  * obviously not as efficient as the typical syscall implementation which
28  * does not require buffers be transferred to userspace and can take
29  * advantage of DMA vectored I/O.
30  */
31 ssize_t sendfile(int out_fd, int in_fd, off_t* offset, size_t count);
32 
33 __END_DECLS
34 
35 #endif  // SYS_SENDFILE_H
36