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connection.cpp
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connection.cpp
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/*
* connection.cpp
*
* Created on: Sep 23, 2017
* Author: root
*/
#include "connection.h"
const int disable_conv_clear=0;//a udp connection in the multiplexer is called conversation in this program,conv for short.
const int disable_conn_clear=0;//a raw connection is called conn.
int report_interval=0;
void server_clear_function(u64_t u64)//used in conv_manager in server mode.for server we have to use one udp fd for one conv(udp connection),
//so we have to close the fd when conv expires
{
fd64_t fd64=u64;
assert(fd_manager.exist(fd64));
ev_io &watcher= fd_manager.get_info(fd64).io_watcher;
ip_port_t &ip_port=fd_manager.get_info(fd64).ip_port;//
assert(conn_manager.exist(ip_port));//
ev_loop *loop =conn_manager.find(ip_port).loop; // overkill ? should we just use ev_default_loop(0)?
ev_io_stop(loop,&watcher);
fd_manager.fd64_close(fd64);
}
////////////////////////////////////////////////////////////////////
conv_manager_t::conv_manager_t()
{
clear_it=conv_last_active_time.begin();
long long last_clear_time=0;
reserve();
}
conv_manager_t::~conv_manager_t()
{
clear();
}
int conv_manager_t::get_size()
{
return conv_to_u64.size();
}
void conv_manager_t::reserve()
{
u64_to_conv.reserve(10007);
conv_to_u64.reserve(10007);
conv_last_active_time.reserve(10007);
}
void conv_manager_t::clear()
{
//if(disable_conv_clear) return ;//////what was the purpose of this code?
if(client_or_server==server_mode)
{
for(auto it=conv_to_u64.begin();it!=conv_to_u64.end();it++)
{
//int fd=int((it->second<<32u)>>32u);
server_clear_function( it->second);
}
}
u64_to_conv.clear();
conv_to_u64.clear();
conv_last_active_time.clear();
clear_it=conv_last_active_time.begin();
}
u32_t conv_manager_t::get_new_conv()
{
u32_t conv=get_fake_random_number_nz();
while(conv_to_u64.find(conv)!=conv_to_u64.end())
{
conv=get_fake_random_number_nz();
}
return conv;
}
int conv_manager_t::is_conv_used(u32_t conv)
{
return conv_to_u64.find(conv)!=conv_to_u64.end();
}
int conv_manager_t::is_u64_used(u64_t u64)
{
return u64_to_conv.find(u64)!=u64_to_conv.end();
}
u32_t conv_manager_t::find_conv_by_u64(u64_t u64)
{
assert(is_u64_used(u64));
return u64_to_conv[u64];
}
u64_t conv_manager_t::find_u64_by_conv(u32_t conv)
{
assert(is_conv_used(conv));
return conv_to_u64[conv];
}
int conv_manager_t::update_active_time(u32_t conv)
{
assert(is_conv_used(conv));
return conv_last_active_time[conv]=get_current_time();
}
int conv_manager_t::insert_conv(u32_t conv,u64_t u64)//////todo add capacity ///done at upper level
{
assert(!is_conv_used(conv));
int bucket_size_before=conv_last_active_time.bucket_count();
u64_to_conv[u64]=conv;
conv_to_u64[conv]=u64;
conv_last_active_time[conv]=get_current_time();
int bucket_size_after=conv_last_active_time.bucket_count();
if(bucket_size_after!=bucket_size_before)
clear_it=conv_last_active_time.begin();
return 0;
}
int conv_manager_t::erase_conv(u32_t conv)
{
//if(disable_conv_clear) return 0;
assert(conv_last_active_time.find(conv)!=conv_last_active_time.end());
u64_t u64=conv_to_u64[conv];
if(client_or_server==server_mode)
{
server_clear_function(u64);
}
assert(conv_to_u64.find(conv)!=conv_to_u64.end());
conv_to_u64.erase(conv);
u64_to_conv.erase(u64);
conv_last_active_time.erase(conv);
return 0;
}
int conv_manager_t::clear_inactive(char * ip_port)
{
if(get_current_time()-last_clear_time>conv_clear_interval)
{
last_clear_time=get_current_time();
return clear_inactive0(ip_port);
}
return 0;
}
int conv_manager_t::clear_inactive0(char * ip_port)
{
if(disable_conv_clear) return 0;
//map<uint32_t,uint64_t>::iterator it;
int cnt=0;
auto it=clear_it;
int size=conv_last_active_time.size();
int num_to_clean=size/conv_clear_ratio+conv_clear_min; //clear 1/10 each time,to avoid latency glitch
num_to_clean=min(num_to_clean,size);
u64_t current_time=get_current_time();
for(;;)
{
if(cnt>=num_to_clean) break;
if(conv_last_active_time.begin()==conv_last_active_time.end()) break;
if(it==conv_last_active_time.end())
{
it=conv_last_active_time.begin();
}
if( current_time -it->second >conv_timeout )
{
//mylog(log_info,"inactive conv %u cleared \n",it->first);
//auto old_it=it;
//it++;
u32_t conv= it->first;
it++;
erase_conv(conv);
if(ip_port==0)
{
mylog(log_info,"conv %x cleared\n",conv);
}
else
{
mylog(log_info,"[%s]conv %x cleared\n",ip_port,conv);
}
}
else
{
it++;
}
cnt++;
}
clear_it=it;
return 0;
}
////////////////////////////////////////////////////////////////////
conn_manager_t::conn_manager_t()
{
//ready_num=0;
mp.reserve(10007);
//fd64_mp.reserve(100007);
clear_it=mp.begin();
last_clear_time=0;
}
int conn_manager_t::exist(ip_port_t ip_port)
{
u64_t u64=ip_port.to_u64();
if(mp.find(u64)!=mp.end())
{
return 1;
}
return 0;
}
conn_info_t *& conn_manager_t::find_p(ip_port_t ip_port) //todo capacity ///done at upper level
//be aware,the adress may change after rehash
{
assert(exist(ip_port));
u64_t u64=ip_port.to_u64();
return mp[u64];
}
conn_info_t & conn_manager_t::find(ip_port_t ip_port) //be aware,the adress may change after rehash
{
assert(exist(ip_port));
u64_t u64=ip_port.to_u64();
return *mp[u64];
}
int conn_manager_t::insert(ip_port_t ip_port)
{
assert(!exist(ip_port));
int bucket_size_before=mp.bucket_count();
mp[ip_port.to_u64()]=new conn_info_t;
int bucket_size_after=mp.bucket_count();
if(bucket_size_after!=bucket_size_before)
clear_it=mp.begin();
return 0;
}
int conn_manager_t::erase(unordered_map<u64_t,conn_info_t*>::iterator erase_it)
{
////////todo close and erase timer_fd ,check fd64 empty ///dont need
delete(erase_it->second);
mp.erase(erase_it->first);
return 0;
}
int conn_manager_t::clear_inactive()
{
if(get_current_time()-last_clear_time>conn_clear_interval)
{
last_clear_time=get_current_time();
return clear_inactive0();
}
return 0;
}
int conn_manager_t::clear_inactive0()
{
//mylog(log_info,"called\n");
unordered_map<u64_t,conn_info_t*>::iterator it;
unordered_map<u64_t,conn_info_t*>::iterator old_it;
if(disable_conn_clear) return 0;
//map<uint32_t,uint64_t>::iterator it;
int cnt=0;
it=clear_it;//TODO,write it back
int size=mp.size();
int num_to_clean=size/conn_clear_ratio+conn_clear_min; //clear 1/10 each time,to avoid latency glitch
//mylog(log_trace,"mp.size() %d\n", size);
num_to_clean=min(num_to_clean,(int)mp.size());
u64_t current_time=get_current_time();
//mylog(log_info,"here size=%d\n",(int)mp.size());
for(;;)
{
if(cnt>=num_to_clean) break;
if(mp.begin()==mp.end()) break;
if(it==mp.end())
{
it=mp.begin();
}
if(it->second->conv_manager.get_size() >0)
{
//mylog(log_info,"[%s:%d]size %d \n",my_ntoa(get_u64_h(it->first)),get_u64_l(it->first),(int)it->second->conv_manager.get_size());
it++;
}
else if(current_time<it->second->last_active_time+server_conn_timeout)
{
it++;
}
else
{
mylog(log_info,"[%s:%d]inactive conn cleared \n",my_ntoa(get_u64_h(it->first)),get_u64_l(it->first));
old_it=it;
it++;
erase(old_it);
}
cnt++;
}
clear_it=it;
return 0;
}