From cbc154038ceef62fcb860d325b97a9b8786bcbe3 Mon Sep 17 00:00:00 2001
From: tianfenghan <rango@swoole.com>
Date: Tue, 4 Jul 2023 18:45:50 +0800
Subject: [PATCH] Optimize code

---
 include/swoole_async.h  | 20 +++++++++++++++-----
 src/coroutine/system.cc | 21 +++------------------
 src/network/client.cc   | 33 +++++++--------------------------
 src/os/base.cc          |  8 ++++----
 4 files changed, 29 insertions(+), 53 deletions(-)

diff --git a/include/swoole_async.h b/include/swoole_async.h
index ba4355e436b..f5c718d2c0d 100644
--- a/include/swoole_async.h
+++ b/include/swoole_async.h
@@ -60,11 +60,20 @@ struct AsyncEvent {
     }
 };
 
-struct GethostbynameData {
-    const char *hostname;
-    int domain;
-    char *host;
-    size_t host_len;
+struct GethostbynameRequest {
+    const char *name;
+    int family;
+    char *addr;
+    size_t addr_len;
+
+    GethostbynameRequest(const char *_name, int _family) : name(_name), family(_family) {
+        addr_len = _family == AF_INET6 ? INET6_ADDRSTRLEN : INET_ADDRSTRLEN;
+        addr = new char[addr_len];
+    }
+
+    ~GethostbynameRequest() {
+        delete[] addr;
+    }
 };
 
 class AsyncThreads {
@@ -88,6 +97,7 @@ class AsyncThreads {
     void notify_one();
 
     static int callback(Reactor *reactor, Event *event);
+
   private:
     std::mutex init_lock;
 };
diff --git a/src/coroutine/system.cc b/src/coroutine/system.cc
index 74b38e22253..e62ce1c56e8 100644
--- a/src/coroutine/system.cc
+++ b/src/coroutine/system.cc
@@ -137,22 +137,8 @@ ssize_t System::write_file(const char *file, char *buf, size_t length, bool lock
 
 std::string gethostbyname_impl_with_async(const std::string &hostname, int domain, double timeout) {
     AsyncEvent ev{};
-    GethostbynameData data;
-    ev.data = &data;
-
-    if (hostname.size() < INET6_ADDRSTRLEN) {
-        data.host_len = INET6_ADDRSTRLEN + 1;
-    } else {
-        data.host_len = hostname.size() + 1;
-    }
-
-    data.host = (char *) sw_malloc(data.host_len);
-    if (!data.host) {
-        return "";
-    }
-
-    data.hostname = hostname.c_str();
-    data.domain = domain;
+    GethostbynameRequest dns_request(hostname.c_str(), domain);
+    ev.data = &dns_request;
     ev.retval = 1;
 
     coroutine::async(async::handler_gethostbyname, ev, timeout);
@@ -164,8 +150,7 @@ std::string gethostbyname_impl_with_async(const std::string &hostname, int domai
         swoole_set_last_error(ev.error);
         return "";
     } else {
-        std::string addr(data.host);
-        sw_free(data.host);
+        std::string addr(dns_request.addr, dns_request.addr_len);
         return addr;
     }
 }
diff --git a/src/network/client.cc b/src/network/client.cc
index 3664ecb18af..816265c9a7c 100644
--- a/src/network/client.cc
+++ b/src/network/client.cc
@@ -615,31 +615,14 @@ static int Client_tcp_connect_async(Client *cli, const char *host, int port, dou
 
     if (cli->wait_dns) {
         AsyncEvent ev{};
-        auto data = (GethostbynameData *) sw_malloc(sizeof(GethostbynameData));
-        ev.data = data;
-
-        size_t len = strlen(cli->server_host);
-        if (len < INET6_ADDRSTRLEN) {
-            data->host_len = INET6_ADDRSTRLEN;
-        } else {
-            data->host_len = len + 1;
-        }
-
-        data->host = (char *) sw_malloc(data->host_len);
-        if (!data->host) {
-            swoole_warning("malloc failed");
-            return SW_ERR;
-        }
-
-        data->hostname = host;
-        data->domain = cli->_sock_domain;
+        auto dns_request = new GethostbynameRequest(cli->server_host, cli->_sock_domain);
+        ev.data = dns_request;
         ev.object = cli;
         ev.handler = async::handler_gethostbyname;
         ev.callback = Client_onResolveCompleted;
 
         if (swoole::async::dispatch(&ev) == nullptr) {
-            sw_free(data->host);
-            sw_free(data);
+            delete dns_request;
             return SW_ERR;
         } else {
             return SW_OK;
@@ -1129,10 +1112,9 @@ static void Client_onTimeout(Timer *timer, TimerNode *tnode) {
 }
 
 static void Client_onResolveCompleted(AsyncEvent *event) {
-    auto data = (GethostbynameData *) event->data;
+    auto dns_request = (GethostbynameRequest *) event->data;
     if (event->canceled) {
-        sw_free(data->host);
-        sw_free(data);
+        delete dns_request;
         return;
     }
 
@@ -1140,7 +1122,7 @@ static void Client_onResolveCompleted(AsyncEvent *event) {
     cli->wait_dns = 0;
 
     if (event->error == 0) {
-        Client_tcp_connect_async(cli, data->host, cli->server_port, cli->timeout, 1);
+        Client_tcp_connect_async(cli, dns_request->addr, cli->server_port, cli->timeout, 1);
     } else {
         swoole_set_last_error(SW_ERROR_DNSLOOKUP_RESOLVE_FAILED);
         cli->socket->removed = 1;
@@ -1149,8 +1131,7 @@ static void Client_onResolveCompleted(AsyncEvent *event) {
             cli->onError(cli);
         }
     }
-    sw_free(data->host);
-    sw_free(data);
+    delete dns_request;
 }
 
 static int Client_onWrite(Reactor *reactor, Event *event) {
diff --git a/src/os/base.cc b/src/os/base.cc
index 339979346f3..9d6c2d10576 100644
--- a/src/os/base.cc
+++ b/src/os/base.cc
@@ -85,14 +85,14 @@ namespace async {
 
 void handler_gethostbyname(AsyncEvent *event) {
     char addr[INET6_ADDRSTRLEN];
-    auto data = (GethostbynameData *) event->data;
-    int ret = network::gethostbyname(data->domain, data->hostname, addr);
-    sw_memset_zero(data->host, data->host_len);
+    auto request = (GethostbynameRequest *) event->data;
+    int ret = network::gethostbyname(request->family, request->name, addr);
+    sw_memset_zero(request->addr, request->addr_len);
 
     if (ret < 0) {
         event->error = SW_ERROR_DNSLOOKUP_RESOLVE_FAILED;
     } else {
-        if (inet_ntop(data->domain, addr, data->host, data->host_len) == nullptr) {
+        if (inet_ntop(request->family, addr, request->addr, request->addr_len) == nullptr) {
             ret = -1;
             event->error = SW_ERROR_BAD_IPV6_ADDRESS;
         } else {