用libevent改造teamtalk底层网络框架
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teamtalk是蘑菇街推出的一套高性能全平台(ios,android,win,mac)开源即时通讯软件，适合中小企业内部使用，同时也适合想基于其网络通讯框架和协议做二次开发的个人爱好者和创业公司使用和学习。
因为之前群友对teamtalk的底层网络框架性能诸多抱怨，并且蓝狐大大也曾跟我说起过想用libevent重写底层网络框架，刚好最近我想用hiredis的异步连接客户端给teamtalk加我自己的功能，而hiredis的异步客户端只能适配libevent, libev, libuv等几个知名的异步框架。如果我想用只有两个办法，一，自己给hiredis新增一个teamtalk的异步网络适配器， 二， 用libevent或者libuv重写teamtalk底层网络框架。
想到改写teamtalk底层网络框架并非易事，有可能迁一发动全身，然后就玩大了，所以我就先去看了hiredis的源码，看了大半天结果发现还是回去改造teamtalk吧。。。
然后就开始在几个网络框架里选择用哪一个来改写，libev首先被剔除了，原因我就不讲了，你懂的。然后对我来讲，因为鄙人的node.js功力非常深厚，而libuv则是node.js的底层网络库，所以选择libuv自然应该是理所当然的了。然后就开始弄了，弄了老半天结果发现真的玩大了，至于为什么你可以去尝试一下，也许你可以的，我是放弃了，然后就还是libevent了。
“你这货废话怎么这么多！！！”
“因为其实我不是程序员，鄙人日常工作是拉皮条的。”
关于teamtalk的底层网络框架的性能问题，我这里先来举个例子做个说明
int netlib_send(net_handle_t handle, void* buf, int len)
{
CBaseSocket* pSocket = FindBaseSocket(handle);
if (!pSocket)
{
return NETLIB_ERROR;
}
int ret = pSocket->Send(buf, len);
pSocket->ReleaseRef();
return ret;
}
上面这段代码是teamtalk的原始netlib库的发送函数，所有功能要发送报文最终都会调到这个函数，然后你就可以看到了，这段函数每次发送数据前都要FindBaseSocket一把，当你的并发连接不多时这个查找倒也无所谓，但如果这时你有十万个并发连接，那么你每次哪怕是发一个小包包都要去这十万个basesocket里面找一把，这个就让人不那么爽了（尽管map查找似乎还挺快，然而也并没有什么软用）。
所以，如果你不爽，那就想办法让自己爽起来吧，人生苦短，请及时行乐。
怎么才能爽起来呢？必须把这里的find给弄掉，并且还不能碰netlib栈以上的代码，也就是说千万别去碰CImConn，如果你连那个也改了，相信我你肯定不会爽起来的。不知道CImConn的同学可以读一下我前面的博文。
所以，原则就定下来了，只能改动netlib内部的实现，不要变动其对外的接口，如果做到这一点，你最终只需要改动很少的代码并让自己爽起来。
“好了，今天就到此为止吧，该说的都讲清楚了，我特么真是个写博客的人才~”
”卧槽，你还没讲怎么改呢！@！“
”不是说了么，只改netlib内部实现，你就能嗨起来了。“
”擦！“
好吧，为了不被喷，我还是把我自己改的代码贡献出来吧
#include "netlib.h"
#include "BaseSocket.h"
#include "EventDispatch.h"
#define __LIBEVENT__
#ifndef __LIBEVENT__
int netlib_init()
{
int ret = NETLIB_OK;
#ifdef _WIN32
WSADATA wsaData;
WORD wReqest = MAKEWORD(1, 1);
if (WSAStartup(wReqest, &wsaData) != 0)
{
ret = NETLIB_ERROR;
}
#endif
return ret;
}
int netlib_destroy()
{
int ret = NETLIB_OK;
#ifdef _WIN32
if (WSACleanup() != 0)
{
ret = NETLIB_ERROR;
}
#endif
return ret;
}
int netlib_listen(
const char* server_ip,
uint16_t port,
callback_t callback,
void* callback_data)
{
auto spSocket = sp_CBaseSocket(new CBaseSocket());
if (!spSocket)
return NETLIB_ERROR;
int ret = spSocket->Listen(server_ip, port, callback, callback_data);
// if (ret == NETLIB_ERROR)
// delete pSocket;
return ret;
}
net_handle_t netlib_connect(
const char* server_ip,
uint16_t port,
callback_t callback,
void* callback_data)
{
auto spSocket = sp_CBaseSocket(new CBaseSocket());
if (!spSocket)
return NETLIB_INVALID_HANDLE;
net_handle_t handle = spSocket->Connect(server_ip, port, callback, callback_data);
// if (handle == NETLIB_INVALID_HANDLE)
// delete pSocket;
return handle;
}
int netlib_send(net_handle_t handle, void* buf, int len)
{
auto spSocket = FindBaseSocket(handle);
if (!spSocket)
{
return NETLIB_ERROR;
}
int ret = spSocket->Send(buf, len);
// pSocket->ReleaseRef();
return ret;
}
int netlib_recv(net_handle_t handle, void* buf, int len)
{
auto spSocket = FindBaseSocket(handle);
if (!spSocket)
return NETLIB_ERROR;
int ret = spSocket->Recv(buf, len);
// pSocket->ReleaseRef();
return ret;
}
int netlib_close(net_handle_t handle)
{
auto spSocket = FindBaseSocket(handle);
if (!spSocket)
return NETLIB_ERROR;
int ret = spSocket->Close();
// pSocket->ReleaseRef();
return ret;
}
int netlib_option(net_handle_t handle, int opt, void* optval)
{
auto spSocket = FindBaseSocket(handle);
if (!spSocket)
return NETLIB_ERROR;
if ((opt >= NETLIB_OPT_GET_REMOTE_IP) && !optval)
return NETLIB_ERROR;
switch (opt)
{
case NETLIB_OPT_SET_CALLBACK:
spSocket->SetCallback((callback_t)optval);
break;
case NETLIB_OPT_SET_CALLBACK_DATA:
spSocket->SetCallbackData(optval);
break;
case NETLIB_OPT_GET_REMOTE_IP:
*(string*)optval = spSocket->GetRemoteIP();
break;
case NETLIB_OPT_GET_REMOTE_PORT:
*(uint16_t*)optval = spSocket->GetRemotePort();
break;
case NETLIB_OPT_GET_LOCAL_IP:
*(string*)optval = spSocket->GetLocalIP();
break;
case NETLIB_OPT_GET_LOCAL_PORT:
*(uint16_t*)optval = spSocket->GetLocalPort();
break;
case NETLIB_OPT_SET_SEND_BUF_SIZE:
spSocket->SetSendBufSize(*(uint32_t*)optval);
break;
case NETLIB_OPT_SET_RECV_BUF_SIZE:
spSocket->SetRecvBufSize(*(uint32_t*)optval);
break;
}
// pSocket->ReleaseRef();
return NETLIB_OK;
}
int netlib_register_timer(callback_t callback, void* user_data, uint64_t interval)
{
CEventDispatch::Instance()->AddTimer(callback, user_data, interval);
return 0;
}
int netlib_delete_timer(callback_t callback, void* user_data)
{
CEventDispatch::Instance()->RemoveTimer(callback, user_data);
return 0;
}
int netlib_add_loop(callback_t callback, void* user_data)
{
CEventDispatch::Instance()->AddLoop(callback, user_data);
return 0;
}
void netlib_eventloop(uint32_t wait_timeout)
{
CEventDispatch::Instance()->StartDispatch(wait_timeout);
}
void netlib_stop_event()
{
CEventDispatch::Instance()->StopDispatch();
}
bool netlib_is_running()
{
return CEventDispatch::Instance()->isRunning();
}
#else
#include <unordered_map>
#include <event2/event.h>
static unordered_map<net_handle_t, struct event*> g_read_event_map;
static unordered_map<net_handle_t, struct event*> g_write_event_map;
static unordered_map<callback_t, struct event*> g_timer_map;
struct event_base* g_libevent_base;
static string _GetRemoteIP(net_handle_t hd);
static uint16_t _GetRemotePort(net_handle_t hd);
static string _GetLocalIP(net_handle_t hd);
static uint16_t _GetLocalPort(net_handle_t hd);
static void _SetSendBufSize(net_handle_t hd, uint32_t send_size);
static void _SetRecvBufSize(net_handle_t hd, uint32_t recv_size);
static int _GetErrorCode();
static void _SetNonblock(SOCKET fd);
static bool _IsBlock(int error_code);
static void _SetReuseAddr(SOCKET fd);
static void _SetNoDelay(SOCKET fd);
static void _SetAddr(const char* ip, const uint16_t port, sockaddr_in* pAddr);
void netlib_onconfirm(evutil_socket_t fd, short what, void *arg);
void netlib_onread(evutil_socket_t fd, short what, void *arg);
void netlib_onwrite(evutil_socket_t fd, short what, void *arg);
void netlib_onaccept(evutil_socket_t fd, short what, void *arg);
void netlib_ontimer(evutil_socket_t fd, short what, void* arg);
void netlib_check_write_error(net_handle_t fd, int* error, socklen_t* len);
void netlib_set_onconnect_event(net_handle_t handle, callback_t callback, void* cbdata);
struct EvtArg {
callback_t callback;
void* cbdata;
EvtArg(callback_t c, void* d) : callback(c), cbdata(d) {}
~EvtArg() {}
};
struct EvtArg2 {
callback_t callback;
void* cbdata;
struct event* evt;
EvtArg2(callback_t c, void* d, struct event* e) : callback(c), cbdata(d), evt(e) {}
~EvtArg2() {}
};
static int _GetErrorCode()
{
#ifdef _WIN32
return WSAGetLastError();
#else
return errno;
#endif
}
static void _SetNonblock(SOCKET fd)
{
#ifdef _WIN32
u_long nonblock = 1;
int ret = ioctlsocket(fd, FIONBIO, &nonblock);
#else
int ret = fcntl(fd, F_SETFL, O_NONBLOCK | fcntl(fd, F_GETFL));
#endif
if (ret == SOCKET_ERROR)
{
log("_SetNonblock failed, err_code=%d", _GetErrorCode());
}
}
static bool _IsBlock(int error_code)
{
#ifdef _WIN32
return ( (error_code == WSAEINPROGRESS) || (error_code == WSAEWOULDBLOCK) );
#else
return ( (error_code == EINPROGRESS) || (error_code == EWOULDBLOCK) );
#endif
}
static void _SetReuseAddr(SOCKET fd)
{
int reuse = 1;
int ret = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char*)&reuse, sizeof(reuse));
if (ret == SOCKET_ERROR)
{
log("_SetReuseAddr failed, err_code=%d", _GetErrorCode());
}
}
static void _SetNoDelay(SOCKET fd)
{
int nodelay = 1;
int ret = setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char*)&nodelay, sizeof(nodelay));
if (ret == SOCKET_ERROR)
{
log("_SetNoDelay failed, err_code=%d", _GetErrorCode());
}
}
static void _SetAddr(const char* ip, const uint16_t port, sockaddr_in* pAddr)
{
memset(pAddr, 0, sizeof(sockaddr_in));
pAddr->sin_family = AF_INET;
pAddr->sin_port = htons(port);
pAddr->sin_addr.s_addr = inet_addr(ip);
if (pAddr->sin_addr.s_addr == INADDR_NONE)
{
hostent* host = gethostbyname(ip);
if (host == NULL)
{
log("gethostbyname failed, ip=%s", ip);
return;
}
pAddr->sin_addr.s_addr = *(uint32_t*)host->h_addr;
}
}
int netlib_init()
{
int ret = NETLIB_OK;
#ifdef _WIN32
WSADATA wsaData;
WORD wReqest = MAKEWORD(1, 1);
if (WSAStartup(wReqest, &wsaData) != 0) {
ret = NETLIB_ERROR;
}
#endif
g_libevent_base = event_base_new();
return ret;
}
int netlib_destroy()
{
int ret = NETLIB_OK;
#ifdef _WIN32
if (WSACleanup() != 0) {
ret = NETLIB_ERROR;
}
#endif
event_base_free(g_libevent_base);
return ret;
}
net_handle_t netlib_connect(
const char* server_ip,
uint16_t port,
callback_t callback,
void* callback_data)
{
net_handle_t sock = socket(AF_INET, SOCK_STREAM, 0);
if (sock == INVALID_SOCKET) {
loge("socket failed, err_code=%d", _GetErrorCode());
return NETLIB_INVALID_HANDLE;
}
_SetNonblock(sock);
_SetNoDelay(sock);
sockaddr_in serv_addr;
_SetAddr(server_ip, port, &serv_addr);
int ret = connect(sock, (sockaddr*)&serv_addr, sizeof(serv_addr));
if ( (ret == SOCKET_ERROR) && (!_IsBlock(_GetErrorCode())) ) {
loge("connect failed, err_code=%d", _GetErrorCode());
closesocket(sock);
return NETLIB_INVALID_HANDLE;
}
auto evtArg2 = new EvtArg2(callback, callback_data, NULL);
evtArg2->evt = event_new(g_libevent_base, sock, EV_WRITE, netlib_onconfirm, evtArg2);
event_add(evtArg2->evt, NULL);
return sock;
}
int netlib_close(net_handle_t handle)
{
auto it = g_read_event_map.find(handle);
if (it != g_read_event_map.end()) {
auto ev = it->second;
g_read_event_map.erase(it);
event_free(ev);
}
auto it2 = g_write_event_map.find(handle);
if (it2 != g_write_event_map.end()) {
auto ev = it2->second;
g_write_event_map.erase(it2);
event_free(ev);
}
closesocket(handle);
return 0;
}
int netlib_listen(
const char* server_ip,
uint16_t port,
callback_t callback,
void* callback_data)
{
auto sock = socket(AF_INET, SOCK_STREAM, 0);
if (sock == INVALID_SOCKET) {
printf("socket failed, err_code=%d\n", _GetErrorCode());
return NETLIB_ERROR;
}
_SetReuseAddr(sock);
_SetNonblock(sock);
sockaddr_in serv_addr;
_SetAddr(server_ip, port, &serv_addr);
int ret = bind(sock, (sockaddr*)&serv_addr, sizeof(serv_addr));
if (ret == SOCKET_ERROR) {
loge("bind failed, err_code=%d", _GetErrorCode());
closesocket(sock);
return NETLIB_ERROR;
}
ret = listen(sock, 64);
if (ret == SOCKET_ERROR) {
loge("listen failed, err_code=%d", _GetErrorCode());
closesocket(sock);
return NETLIB_ERROR;
}
auto evtArg = new EvtArg(callback, callback_data);
struct event* ev = event_new(g_libevent_base, sock, EV_READ|EV_PERSIST, netlib_onaccept, evtArg);
event_add(ev, NULL);
return NETLIB_OK;
}
void netlib_onaccept(evutil_socket_t fd, short what, void *arg)
{
sockaddr_in peer_addr;
socklen_t addr_len = sizeof(sockaddr_in);
char ip_str[64];
while ( (fd = accept(fd, (sockaddr*)&peer_addr, &addr_len)) != INVALID_SOCKET )
{
_SetNoDelay(fd);
_SetNonblock(fd);
auto evtArg = (EvtArg*)arg;
evtArg->callback(evtArg->cbdata, NETLIB_MSG_CONNECT, (net_handle_t)fd, NULL);
}
}
void netlib_check_write_error(net_handle_t fd, int* error, socklen_t* len)
{
#ifdef _WIN32
getsockopt(fd, SOL_SOCKET, SO_ERROR, (char*)error, len);
#else
getsockopt(fd, SOL_SOCKET, SO_ERROR, (void*)error, len);
#endif
}
void netlib_onconfirm(evutil_socket_t fd, short what, void *arg)
{
auto evtArg2 = (EvtArg2*)arg;
int error = 0;
socklen_t len = sizeof(error);
netlib_check_write_error((net_handle_t)fd, &error, &len);
if (error) {
evtArg2->callback(evtArg2->cbdata, NETLIB_MSG_CLOSE, (net_handle_t)fd, NULL);
} else {
event_free(evtArg2->evt);
auto arg = new EvtArg(evtArg2->callback, evtArg2->cbdata);
struct event* evread = event_new(g_libevent_base, fd, EV_READ|EV_PERSIST|EV_ET, netlib_onread, arg);
struct event* evwrite = event_new(g_libevent_base, fd, EV_WRITE|EV_PERSIST|EV_ET, netlib_onwrite, arg);
event_add(evread, NULL);
event_add(evwrite, NULL);
g_read_event_map[fd] = evread;
g_write_event_map[fd] = evwrite;
evtArg2->callback(evtArg2->cbdata, NETLIB_MSG_CONFIRM, (net_handle_t)fd, NULL);
}
}
void netlib_onread(evutil_socket_t fd, short what, void *arg)
{
auto evtArg = (EvtArg*)arg;
evtArg->callback(evtArg->cbdata, NETLIB_MSG_READ, (net_handle_t)fd, NULL);
}
void netlib_onwrite(evutil_socket_t fd, short what, void *arg)
{
auto evtArg = (EvtArg*)arg;
evtArg->callback(evtArg->cbdata, NETLIB_MSG_WRITE, (net_handle_t)fd, NULL);
}
void netlib_set_onconnect_event(net_handle_t handle, callback_t callback, void* cbdata)
{
auto arg = new EvtArg(callback, cbdata);
struct event* evread = event_new(g_libevent_base, handle, EV_READ|EV_PERSIST|EV_ET, netlib_onread, arg);
struct event* evwrite = event_new(g_libevent_base, handle, EV_WRITE|EV_PERSIST|EV_ET, netlib_onwrite, arg);
event_add(evread, NULL);
event_add(evwrite, NULL);
g_read_event_map[handle] = evread;
g_write_event_map[handle] = evwrite;
}
string _GetRemoteIP(net_handle_t hd)
{
struct sockaddr_in sa;
socklen_t len = sizeof(sa);
if (!getpeername(hd, (struct sockaddr*)&sa, &len)) {
return inet_ntoa(sa.sin_addr);
} else {
return "";
}
}
uint16_t _GetRemotePort(net_handle_t hd)
{
struct sockaddr_in sa;
socklen_t len = sizeof(sa);
if (!getpeername(hd, (struct sockaddr*)&sa, &len)) {
return ntohs(sa.sin_port);
} else {
return 0;
}
}
string _GetLocalIP(net_handle_t hd)
{
struct sockaddr_in sa;
socklen_t len = sizeof(sa);
if (!getsockname(hd, (struct sockaddr*)&sa, &len)) {
return inet_ntoa(sa.sin_addr);
} else {
return "";
}
}
uint16_t _GetLocalPort(net_handle_t hd)
{
struct sockaddr_in sa;
socklen_t len = sizeof(sa);
if (!getsockname(hd, (struct sockaddr*)&sa, &len)) {
return ntohs(sa.sin_port);
} else {
return 0;
}
}
void _SetSendBufSize(net_handle_t hd, uint32_t send_size)
{
int ret = setsockopt(hd, SOL_SOCKET, SO_SNDBUF, &send_size, 4);
if (ret == SOCKET_ERROR) {
loge("set SO_SNDBUF failed for fd=%d", hd);
}
socklen_t len = 4;
int size = 0;
getsockopt(hd, SOL_SOCKET, SO_SNDBUF, &size, &len);
loge("socket=%d send_buf_size=%d", hd, size);
}
void _SetRecvBufSize(net_handle_t hd, uint32_t recv_size)
{
int ret = setsockopt(hd, SOL_SOCKET, SO_RCVBUF, &recv_size, 4);
if (ret == SOCKET_ERROR) {
loge("set SO_RCVBUF failed for fd=%d", hd);
}
socklen_t len = 4;
int size = 0;
getsockopt(hd, SOL_SOCKET, SO_RCVBUF, &size, &len);
loge("socket=%d recv_buf_size=%d", hd, size);
}
int netlib_option(net_handle_t handle, int opt, void* optval)
{
static callback_t cb;
if ((opt >= NETLIB_OPT_GET_REMOTE_IP) && !optval)
return NETLIB_ERROR;
switch (opt) {
case NETLIB_OPT_SET_CALLBACK:
cb = (callback_t)optval;
break;
case NETLIB_OPT_SET_CALLBACK_DATA:
netlib_set_onconnect_event(handle, cb, optval);
break;
case NETLIB_OPT_GET_REMOTE_IP:
*(string*)optval = _GetRemoteIP(handle);
break;
case NETLIB_OPT_GET_REMOTE_PORT:
*(uint16_t*)optval = _GetRemotePort(handle);
break;
case NETLIB_OPT_GET_LOCAL_IP:
*(string*)optval = _GetLocalIP(handle);
break;
case NETLIB_OPT_GET_LOCAL_PORT:
*(uint16_t*)optval = _GetLocalPort(handle);
break;
case NETLIB_OPT_SET_SEND_BUF_SIZE:
_SetSendBufSize(handle, *(uint32_t*)optval);
break;
case NETLIB_OPT_SET_RECV_BUF_SIZE:
_SetRecvBufSize(handle, *(uint32_t*)optval);
break;
default:
break;
}
return NETLIB_OK;
}
int netlib_send(net_handle_t handle, void* buf, int len)
{
return send(handle, (char*)buf, len, 0);
}
int netlib_recv(net_handle_t handle, void* buf, int len)
{
return recv(handle, (char*)buf, len, 0);
}
int netlib_register_timer(callback_t callback, void* user_data, uint64_t interval)
{
long int sec = interval/1000L;
long int usec = interval%1000L;
struct timeval t = {sec, usec};
auto arg = new EvtArg(callback, user_data);
struct event* ev = event_new(g_libevent_base, -1, EV_PERSIST, netlib_ontimer, arg);
event_add(ev, &t);
g_timer_map[callback] = ev;
return 0;
}
int netlib_delete_timer(callback_t callback, void* user_data)
{
auto it = g_timer_map.find(callback);
if (it != g_timer_map.end()) {
auto ev = it->second;
g_timer_map.erase(it);
event_free(ev);
}
return 0;
}
void netlib_ontimer(evutil_socket_t fd, short what, void* arg)
{
EvtArg* evtArg = (EvtArg*)arg;
evtArg->callback(evtArg->cbdata, NETLIB_MSG_TIMER, 0, NULL);
}
int netlib_add_loop(callback_t callback, void* user_data)
{
struct timeval t = {0, 100};
auto arg = new EvtArg(callback, user_data);
struct event* ev = event_new(g_libevent_base, -1, EV_PERSIST, netlib_ontimer, arg);
event_add(ev, &t);
// g_timer_map[callback] = ev;
return 0;
}
void netlib_eventloop(uint32_t wait_timeout)
{
event_base_dispatch(g_libevent_base);
}
void netlib_stop_event()
{
event_base_loopbreak(g_libevent_base);
}
bool netlib_is_running()
{
bool ret = !event_base_got_break(g_libevent_base);
return ret;
}
#endif
另外还有个地方需要说明一下，我把原来BaseSocket.cpp里面的OnRead和OnWrite里的出错检查给去掉了，因为我觉得也让我不爽，也就是下面这两段代码，并且把连接事件明确的和onaccept以及onconfirm对应起来，所以不再需要在onread和onwrite里来判断当前socket状态是listening还是connecting来选择accept和confirm了。
u_long avail = 0;
if ( (ioctlsocket(m_socket, FIONREAD, &avail) == SOCKET_ERROR) || (avail == 0) )
{
m_callback(m_callback_data, NETLIB_MSG_CLOSE, (net_handle_t)m_socket, NULL);
}
#if ((defined _WIN32) || (defined __APPLE__))
CEventDispatch::Instance()->RemoveEvent(m_socket, SOCKET_WRITE);
#endif
if (m_state == SOCKET_STATE_CONNECTING)
{
int error = 0;
socklen_t len = sizeof(error);
#ifdef _WIN32
getsockopt(m_socket, SOL_SOCKET, SO_ERROR, (char*)&error, &len);
#else
getsockopt(m_socket, SOL_SOCKET, SO_ERROR, (void*)&error, &len);
#endif
if (error) {
m_callback(m_callback_data, NETLIB_MSG_CLOSE, (net_handle_t)m_socket, NULL);
} else {
m_state = SOCKET_STATE_CONNECTED;
”卧槽，你不是说不要碰netlib上层的代码吗！？“
”但是我还是碰了，因为不碰不能爽。。“
请自己搜一下你代码里调用netlib_recv和netlib_send的地方，然后略作如下修改
void CImConn::OnRead()
{
for (;;)
{
uint32_t free_buf_len = m_in_buf.GetAllocSize() - m_in_buf.GetWriteOffset();
if (free_buf_len < READ_BUF_SIZE)
m_in_buf.Extend(READ_BUF_SIZE);
int ret = netlib_recv(m_handle, m_in_buf.GetBuffer() + m_in_buf.GetWriteOffset(), READ_BUF_SIZE);
if (ret == 0) {
log("close on netlib_recv=0");
OnClose();
return;
} else if (ret < 0) {
if (errno == EAGAIN || errno == EWOULDBLOCK) {
break;
} else {
log("close on error=%d", errno);
OnClose();
return;
}
}
void CImConn::OnWrite()
{
// CAutoLock autoLock(&s_send_lock);
if (!m_busy)
return;
while (m_out_buf.GetWriteOffset() > 0) {
int send_size = m_out_buf.GetWriteOffset();
if (send_size > NETLIB_MAX_SOCKET_BUF_SIZE) {
send_size = NETLIB_MAX_SOCKET_BUF_SIZE;
}
int ret = netlib_send(m_handle, m_out_buf.GetBuffer(), send_size);
if (ret <= 0) {
if (errno == EAGAIN || errno == EWOULDBLOCK) {
break;
} else {
log("close on error=%d", errno);
OnClose();
return;
}
}