vcpu support http server (#616)

Signed-off-by: liulanzheng <lanzheng.liulz@alibaba-inc.com>

net/http/server.cpp

@@ -31,6 +31,7 @@ limitations under the License.
 #include "client.h"
 #include "message.h"
 #include "body.h"
+#include <atomic>
 
 
 #ifndef MSG_MORE
@@ -65,8 +66,9 @@ class HTTPServerImpl : public HTTPServer {
     } status = Status::running;
 
     HandlerRecord m_default_handler = {"", nullptr, false, {this, &HTTPServerImpl::not_found_handler}};
-    uint64_t m_workers = 0;
+    std::atomic<uint64_t> m_workers{0};
     intrusive_list<SockItem> m_connection_list;
+    photon::spinlock m_connection_list_lock;
     std::vector<HandlerRecord> m_handlers;
 
     HTTPServerImpl() {}
@@ -107,8 +109,14 @@ class HTTPServerImpl : public HTTPServer {
         m_workers++;
         DEFER(m_workers--);
         SockItem sock_item(sock);
-        m_connection_list.push_back(&sock_item);
-        DEFER(m_connection_list.erase(&sock_item));
+        {
+            SCOPED_LOCK(m_connection_list_lock);
+            m_connection_list.push_back(&sock_item);
+        }
+        DEFER({
+            SCOPED_LOCK(m_connection_list_lock);
+            m_connection_list.erase(&sock_item);
+        });
 
         char req_buf[64*1024];
         char resp_buf[64*1024];