ecee434fae
This method works around the downsides of ENDPOINT_ALLOC, namely that it is not affected by memory fragmentation and it uses an upstream interface. Also add libasyncio to provide the necessary syscalls to both adb and mtp. Add some small optimizations to file_sync. Bug: 37916658 Test: run adb push/pull Change-Id: If3b3be02b5e2d4f9cffec1b8ddc02a5768a51a1f
50 lines
1.7 KiB
C++
50 lines
1.7 KiB
C++
/*
|
|
* Copyright (C) 2016 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 <asyncio/AsyncIO.h>
|
|
#include <sys/syscall.h>
|
|
#include <unistd.h>
|
|
|
|
int io_setup(unsigned nr, aio_context_t* ctxp) {
|
|
memset(ctxp, 0, sizeof(*ctxp));
|
|
return syscall(__NR_io_setup, nr, ctxp);
|
|
}
|
|
|
|
int io_destroy(aio_context_t ctx) {
|
|
return syscall(__NR_io_destroy, ctx);
|
|
}
|
|
|
|
int io_submit(aio_context_t ctx, long nr, iocb** iocbpp) {
|
|
return syscall(__NR_io_submit, ctx, nr, iocbpp);
|
|
}
|
|
|
|
int io_getevents(aio_context_t ctx, long min_nr, long max_nr, io_event* events, timespec* timeout) {
|
|
return syscall(__NR_io_getevents, ctx, min_nr, max_nr, events, timeout);
|
|
}
|
|
|
|
int io_cancel(aio_context_t ctx, iocb* iocbp, io_event* result) {
|
|
return syscall(__NR_io_cancel, ctx, iocbp, result);
|
|
}
|
|
|
|
void io_prep(iocb* iocb, int fd, const void* buf, uint64_t count, int64_t offset, bool read) {
|
|
memset(iocb, 0, sizeof(*iocb));
|
|
iocb->aio_fildes = fd;
|
|
iocb->aio_lio_opcode = read ? IOCB_CMD_PREAD : IOCB_CMD_PWRITE;
|
|
iocb->aio_reqprio = 0;
|
|
iocb->aio_buf = reinterpret_cast<uint64_t>(buf);
|
|
iocb->aio_nbytes = count;
|
|
iocb->aio_offset = offset;
|
|
}
|