361 lines
11 KiB
C
361 lines
11 KiB
C
/*
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* Copyright (c) 2020 YuQing <384681@qq.com>
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*
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* This program is free software: you can use, redistribute, and/or modify
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* it under the terms of the Lesser GNU General Public License, version 3
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* or later ("LGPL"), as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE.
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*
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* You should have received a copy of the Lesser GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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//connection_pool.h
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#ifndef _CONNECTION_POOL_H
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#define _CONNECTION_POOL_H
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include "common_define.h"
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#include "fast_mblock.h"
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#include "ini_file_reader.h"
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#include "pthread_func.h"
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#include "hash.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define FC_CONNECTION_SERVER_EQUAL(conn, target_ip, target_port) \
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(strcmp((conn).ip_addr, target_ip) == 0 && \
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(conn).port == target_port)
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#define FC_CONNECTION_SERVER_EQUAL1(conn1, conn2) \
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(strcmp((conn1).ip_addr, (conn2).ip_addr) == 0 && \
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(conn1).port == (conn2).port)
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typedef enum {
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fc_network_type_sock = 0,
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fc_network_type_rdma
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} FCNetworkType;
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typedef struct {
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int sock;
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uint16_t port;
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short socket_domain; //socket domain, AF_INET, AF_INET6 or AF_UNSPEC for auto dedect
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FCNetworkType network_type;
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bool validate_flag; //for connection pool
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char ip_addr[INET6_ADDRSTRLEN];
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char args[0]; //for extra data
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} ConnectionInfo;
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typedef int (*fc_connection_callback_func)(ConnectionInfo *conn, void *args);
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struct tagConnectionManager;
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typedef struct tagConnectionNode {
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ConnectionInfo *conn;
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struct tagConnectionManager *manager;
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struct tagConnectionNode *next;
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time_t atime; //last access time
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} ConnectionNode;
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typedef struct tagConnectionManager {
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ConnectionNode *head;
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int total_count; //total connections
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int free_count; //free connections
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pthread_mutex_t lock;
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} ConnectionManager;
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typedef struct tagConnectionPool {
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HashArray hash_array; //key is ip:port, value is ConnectionManager
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pthread_mutex_t lock;
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int connect_timeout;
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int max_count_per_entry; //0 means no limit
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/*
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connections whose idle time exceeds this time will be closed
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unit: second
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*/
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int max_idle_time;
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int socket_domain; //socket domain
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struct fast_mblock_man manager_allocator;
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struct fast_mblock_man node_allocator;
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struct {
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fc_connection_callback_func func;
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void *args;
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} connect_done_callback;
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struct {
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fc_connection_callback_func func;
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void *args;
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} validate_callback;
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} ConnectionPool;
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/**
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* init ex function
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* parameters:
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* cp: the ConnectionPool
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* connect_timeout: the connect timeout in seconds
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* max_count_per_entry: max connection count per host:port
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* max_idle_time: reconnect the server after max idle time in seconds
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* socket_domain: the socket domain
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* htable_init_capacity: the init capacity of connection hash table
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* connect_done_func: the connect done connection callback
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* connect_done_args: the args for connect done connection callback
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* validate_func: the validate connection callback
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* validate_args: the args for validate connection callback
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* extra_data_size: the extra data size of connection
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* return 0 for success, != 0 for error
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*/
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int conn_pool_init_ex1(ConnectionPool *cp, int connect_timeout,
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const int max_count_per_entry, const int max_idle_time,
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const int socket_domain, const int htable_init_capacity,
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fc_connection_callback_func connect_done_func, void *connect_done_args,
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fc_connection_callback_func validate_func, void *validate_args,
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const int extra_data_size);
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/**
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* init ex function
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* parameters:
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* cp: the ConnectionPool
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* connect_timeout: the connect timeout in seconds
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* max_count_per_entry: max connection count per host:port
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* max_idle_time: reconnect the server after max idle time in seconds
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* socket_domain: the socket domain
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* return 0 for success, != 0 for error
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*/
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static inline int conn_pool_init_ex(ConnectionPool *cp, int connect_timeout,
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const int max_count_per_entry, const int max_idle_time,
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const int socket_domain)
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{
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const int htable_init_capacity = 0;
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const int extra_data_size = 0;
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return conn_pool_init_ex1(cp, connect_timeout, max_count_per_entry,
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max_idle_time, socket_domain, htable_init_capacity,
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NULL, NULL, NULL, NULL, extra_data_size);
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}
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/**
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* init function
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* parameters:
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* cp: the ConnectionPool
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* connect_timeout: the connect timeout in seconds
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* max_count_per_entry: max connection count per host:port
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* max_idle_time: reconnect the server after max idle time in seconds
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* return 0 for success, != 0 for error
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*/
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static inline int conn_pool_init(ConnectionPool *cp, int connect_timeout,
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const int max_count_per_entry, const int max_idle_time)
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{
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const int socket_domain = AF_INET;
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const int htable_init_capacity = 0;
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const int extra_data_size = 0;
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return conn_pool_init_ex1(cp, connect_timeout, max_count_per_entry,
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max_idle_time, socket_domain, htable_init_capacity,
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NULL, NULL, NULL, NULL, extra_data_size);
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}
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/**
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* destroy function
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* parameters:
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* cp: the ConnectionPool
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* return none
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**/
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void conn_pool_destroy(ConnectionPool *cp);
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/**
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* get connection from the pool
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* parameters:
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* cp: the ConnectionPool
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* conn: the connection
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* service_name: the service name to log
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* err_no: return the the errno, 0 for success
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* return != NULL for success, NULL for error
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*/
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ConnectionInfo *conn_pool_get_connection_ex(ConnectionPool *cp,
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const ConnectionInfo *conn, const char *service_name, int *err_no);
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#define conn_pool_get_connection(cp, conn, err_no) \
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conn_pool_get_connection_ex(cp, conn, NULL, err_no)
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#define conn_pool_close_connection(cp, conn) \
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conn_pool_close_connection_ex(cp, conn, false)
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/**
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* push back the connection to pool
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* parameters:
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* cp: the ConnectionPool
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* conn: the connection
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* bForce: set true to close the socket, else only push back to connection pool
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* return 0 for success, != 0 for error
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*/
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int conn_pool_close_connection_ex(ConnectionPool *cp, ConnectionInfo *conn,
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const bool bForce);
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/**
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* disconnect from the server
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* parameters:
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* pConnection: the connection
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* return 0 for success, != 0 for error
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*/
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void conn_pool_disconnect_server(ConnectionInfo *pConnection);
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/**
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* connect to the server
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* parameters:
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* pConnection: the connection
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* service_name: the service name to log
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* connect_timeout: the connect timeout in seconds
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* bind_ipaddr: the ip address to bind, NULL or empty for any
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* log_connect_error: if log error info when connect fail
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* NOTE: pConnection->sock will be closed when it >= 0 before connect
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* return 0 for success, != 0 for error
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*/
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int conn_pool_connect_server_ex1(ConnectionInfo *conn,
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const char *service_name, const int connect_timeout,
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const char *bind_ipaddr, const bool log_connect_error);
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/**
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* connect to the server
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* parameters:
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* pConnection: the connection
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* connect_timeout: the connect timeout in seconds
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* bind_ipaddr: the ip address to bind, NULL or empty for any
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* log_connect_error: if log error info when connect fail
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* NOTE: pConnection->sock will be closed when it >= 0 before connect
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* return 0 for success, != 0 for error
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*/
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static inline int conn_pool_connect_server_ex(ConnectionInfo *pConnection,
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const int connect_timeout, const char *bind_ipaddr,
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const bool log_connect_error)
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{
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const char *service_name = NULL;
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return conn_pool_connect_server_ex1(pConnection, service_name,
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connect_timeout, bind_ipaddr, log_connect_error);
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}
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/**
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* connect to the server
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* parameters:
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* pConnection: the connection
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* connect_timeout: the connect timeout in seconds
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* NOTE: pConnection->sock will be closed when it >= 0 before connect
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* return 0 for success, != 0 for error
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*/
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static inline int conn_pool_connect_server(ConnectionInfo *pConnection,
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const int connect_timeout)
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{
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const char *service_name = NULL;
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const char *bind_ipaddr = NULL;
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return conn_pool_connect_server_ex1(pConnection, service_name,
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connect_timeout, bind_ipaddr, true);
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}
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/**
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* connect to the server
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* parameters:
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* pConnection: the connection
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* connect_timeout: the connect timeout in seconds
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* return 0 for success, != 0 for error
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*/
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static inline int conn_pool_connect_server_anyway(ConnectionInfo *pConnection,
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const int connect_timeout)
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{
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const char *service_name = NULL;
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const char *bind_ipaddr = NULL;
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pConnection->sock = -1;
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return conn_pool_connect_server_ex1(pConnection, service_name,
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connect_timeout, bind_ipaddr, true);
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}
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/**
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* async connect to the server
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* parameters:
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* pConnection: the connection
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* bind_ipaddr: the ip address to bind, NULL or empty for any
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* NOTE: pConnection->sock will be closed when it >= 0 before connect
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* return 0 or EINPROGRESS for success, others for error
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*/
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int conn_pool_async_connect_server_ex(ConnectionInfo *conn,
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const char *bind_ipaddr);
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#define conn_pool_async_connect_server(conn) \
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conn_pool_async_connect_server_ex(conn, NULL)
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/**
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* get connection count of the pool
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* parameters:
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* cp: the ConnectionPool
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* return current connection count
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*/
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int conn_pool_get_connection_count(ConnectionPool *cp);
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/**
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* load server info from config file
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* parameters:
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* pIniContext: the ini context
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* filename: the config filename
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* item_name: the item name in config file, format item_name=server:port
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* pServerInfo: store server info
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* default_port: the default port
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* return 0 for success, != 0 for error
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*/
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int conn_pool_load_server_info(IniContext *pIniContext, const char *filename,
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const char *item_name, ConnectionInfo *pServerInfo,
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const int default_port);
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/**
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* parse server info from string
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* parameters:
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* pServerStr: server and port string as server:port
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* pServerInfo: store server info
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* default_port: the default port
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* return 0 for success, != 0 for error
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*/
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int conn_pool_parse_server_info(const char *pServerStr,
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ConnectionInfo *pServerInfo, const int default_port);
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/**
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* set server info with ip address and port
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* parameters:
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* pServerInfo: store server info
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* ip_addr: the ip address
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* port: the port
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* return none
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*/
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static inline void conn_pool_set_server_info(ConnectionInfo *pServerInfo,
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const char *ip_addr, const int port)
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{
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snprintf(pServerInfo->ip_addr, sizeof(pServerInfo->ip_addr),
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"%s", ip_addr);
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pServerInfo->port = port;
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pServerInfo->socket_domain = AF_UNSPEC;
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pServerInfo->sock = -1;
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}
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static inline int conn_pool_compare_ip_and_port(const char *ip1,
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const int port1, const char *ip2, const int port2)
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{
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int result;
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if ((result=strcmp(ip1, ip2)) != 0) {
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return result;
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}
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return port1 - port2;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif
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