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107 lines
2.1 KiB
C++
107 lines
2.1 KiB
C++
/*
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Copyright (c) 2020 Sogou, Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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Author: Xie Han (xiehan@sogou-inc.com)
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*/
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#ifndef _IOSERVICE_LINUX_H_
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#define _IOSERVICE_LINUX_H_
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#include <sys/uio.h>
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#include <sys/eventfd.h>
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#include <stddef.h>
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#include <pthread.h>
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#include "list.h"
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#define IOS_STATE_SUCCESS 0
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#define IOS_STATE_ERROR 1
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class IOSession
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{
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private:
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virtual int prepare() = 0;
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virtual void handle(int state, int error) = 0;
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protected:
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/* prepare() has to call one of the the prep_ functions. */
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void prep_pread(int fd, void *buf, size_t count, long long offset);
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void prep_pwrite(int fd, void *buf, size_t count, long long offset);
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void prep_preadv(int fd, const struct iovec *iov, int iovcnt,
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long long offset);
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void prep_pwritev(int fd, const struct iovec *iov, int iovcnt,
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long long offset);
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void prep_fsync(int fd);
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void prep_fdsync(int fd);
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protected:
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long get_res() const { return this->res; }
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private:
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char iocb_buf[64];
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long res;
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private:
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struct list_head list;
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public:
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virtual ~IOSession() { }
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friend class IOService;
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friend class Communicator;
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};
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class IOService
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{
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public:
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int init(int maxevents);
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void deinit();
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int request(IOSession *session);
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private:
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virtual void handle_stop(int error) { }
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virtual void handle_unbound() = 0;
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private:
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virtual int create_event_fd()
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{
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return eventfd(0, 0);
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}
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private:
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struct io_context *io_ctx;
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private:
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void incref();
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void decref();
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private:
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int event_fd;
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int ref;
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private:
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struct list_head session_list;
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pthread_mutex_t mutex;
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private:
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static void *aio_finish(void *context);
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public:
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virtual ~IOService() { }
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friend class Communicator;
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};
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#endif
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