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.
123 lines
2.6 KiB
123 lines
2.6 KiB
/*
|
|
Copyright (c) 2020 Sogou, Inc.
|
|
|
|
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.
|
|
|
|
Author: Xie Han (xiehan@sogou-inc.com)
|
|
*/
|
|
|
|
#ifndef _IOSERVICE_THREAD_H_
|
|
#define _IOSERVICE_THREAD_H_
|
|
|
|
#include <sys/uio.h>
|
|
#include <unistd.h>
|
|
#include <stddef.h>
|
|
#include <pthread.h>
|
|
#include "list.h"
|
|
|
|
#define IOS_STATE_SUCCESS 0
|
|
#define IOS_STATE_ERROR 1
|
|
|
|
class IOSession
|
|
{
|
|
private:
|
|
virtual int prepare() = 0;
|
|
virtual void handle(int state, int error) = 0;
|
|
|
|
protected:
|
|
/* prepare() has to call one of the the prep_ functions. */
|
|
void prep_pread(int fd, void *buf, size_t count, long long offset);
|
|
void prep_pwrite(int fd, void *buf, size_t count, long long offset);
|
|
void prep_preadv(int fd, const struct iovec *iov, int iovcnt,
|
|
long long offset);
|
|
void prep_pwritev(int fd, const struct iovec *iov, int iovcnt,
|
|
long long offset);
|
|
void prep_fsync(int fd);
|
|
void prep_fdsync(int fd);
|
|
|
|
protected:
|
|
long get_res() const { return this->res; }
|
|
|
|
private:
|
|
int fd;
|
|
int op;
|
|
void *buf;
|
|
size_t count;
|
|
long long offset;
|
|
long res;
|
|
|
|
private:
|
|
struct list_head list;
|
|
class IOService *service;
|
|
pthread_t tid;
|
|
|
|
public:
|
|
virtual ~IOSession() { }
|
|
friend class IOService;
|
|
friend class Communicator;
|
|
};
|
|
|
|
class IOService
|
|
{
|
|
public:
|
|
int init(int maxevents);
|
|
void deinit();
|
|
|
|
int request(IOSession *session);
|
|
|
|
private:
|
|
virtual void handle_stop(int error) { }
|
|
virtual void handle_unbound() = 0;
|
|
|
|
private:
|
|
virtual int create_pipe_fd(int pipe_fd[2])
|
|
{
|
|
return pipe(pipe_fd);
|
|
}
|
|
|
|
private:
|
|
int maxevents;
|
|
int nevents;
|
|
|
|
private:
|
|
void incref();
|
|
void decref();
|
|
|
|
private:
|
|
int pipe_fd[2];
|
|
int ref;
|
|
|
|
private:
|
|
struct list_head session_list;
|
|
pthread_mutex_t mutex;
|
|
|
|
private:
|
|
static void *io_routine(void *arg);
|
|
static void *aio_finish(void *ptr, void *context);
|
|
|
|
private:
|
|
static ssize_t preadv_emul(int fd, const struct iovec *iov, int iovcnt,
|
|
off_t offset);
|
|
static ssize_t pwritev_emul(int fd, const struct iovec *iov, int iovcnt,
|
|
off_t offset);
|
|
ssize_t (*preadv)(int, const struct iovec *, int, off_t);
|
|
ssize_t (*pwritev)(int, const struct iovec *, int, off_t);
|
|
|
|
public:
|
|
virtual ~IOService() { }
|
|
friend class Communicator;
|
|
};
|
|
|
|
#endif
|
|
|