在C++應用程序中使用boost 1.4.2 asio並得到linux編譯器警告我不喜歡。boost asio ssl流套接字編譯問題
還在嗎?
我正在處理的應用程序需要一個可能是ssl套接字或常規tcp套接字的「套接字」,因此我們在模板「套接字」類後面隱藏了具體的 ,該套接字可以使用ssl套接字類或 tcp套接字類作爲模板參數 - 下面是ssl類代碼。
該應用程序無需打開任何優化即可正常運行;問題是當我在linux g ++ 4.4.1 下編譯並打開-02或更高優化時,-fstrict-aliasing標誌打開。 編譯導致沿線的嚴格別名警告: 「警告:提領型punned指針將打破嚴格走樣規則」 無處不在我取_psock(如_psock->握手)
我想知道爲什麼這個警告被髮出,並且它表明一個設計問題...
class socket_ssl_cli
{
public:
typedef ba::ssl::stream<ba::ip::tcp::socket> socket_type;
socket_ssl_cli(ba::io_service& io_svc, SocketConfig & sockcfg)
: _io_svc(io_svc)
, _ctxt(_io_svc, ba::ssl::context::tlsv1)
, _psock(0)
{
try {
// the one and only ssl context
// hardcoded for test, but get these values from config
_ctxt.set_options(ba::ssl::context::default_workarounds |
ba::ssl::context::verify_none);
_psock = new socket_type(_io_svc, _ctxt);
} catch (bs::system_error & x) {
throw std::runtime_error(x.code().message());
}
}
~socket_ssl_cli()
{
if (_psock) {
bs::error_code ec;
close_socket(ec);
delete _psock;
}
}
socket_type & raw_socket() { return *_psock; }
void setup(bs::error_code & ec)
{
_psock->handshake(ba::ssl::stream_base::client, ec);
}
void close_socket(bs::error_code & ec)
{
// shut down ssl, then shutdown socket, then close socket
_psock->shutdown(ec);
_psock->lowest_layer().shutdown(ba::socket_base::shutdown_both, ec);
_psock->lowest_layer().close(ec);
}
private:
ba::io_service & _io_svc;
ba::ssl::context _ctxt;
socket_type * _psock;
};
所有-02痛苦編譯輸出開啓,這會導致-fstrict走樣
../。 ./../../third-party/boost/1.42.0/boost/function/function_base.hpp :321:警告:取消引用類型指針會打破嚴格別名規則 ../../../../third-party/boost/1.42.0/boost/function/function_base.hpp:325:warning :解引用類型指針會破壞嚴格別名規則 ../../../../third-party/boost/1.42.0/boost/function/function_base.hpp:在靜態成員函數'static void boost :: detail :: function :: functor_manager_common :: manage_small(const boost :: detail :: function :: function_buffer &,boost :: detail :: function :: function_buffer &,boost :: detail :: function :: functor_manager_operation_type) [with Functor = boost :: _ bi :: bind_t> >>,boost :: _ bi :: list1 >>> *> >>>]': ../../../../third-party/boost/ 1.42.0/boost/function/function_base.hpp:360:從'static void boost :: detail :: function :: functor_manager :: manager(const boost :: detail :: function :: function_buffer 01 boost :: detail :: function :: function_buffer &,boost :: detail :: function :: functor_manager_operation_type,mpl _ :: true_)[with Functor = boost :: _ bi :: bind_t> >>,boost :: _ bi: :list1>> *> >>>]' ../../../../third-party/boost/1.42.0/boost/function/function_base.hpp:406:從'static void boost: :detail :: function :: functor_manager :: manager(const boost :: detail :: function :: function_buffer &,boost :: detail :: function :: function_buffer &,boost :: detail :: function :: functor_manager_operation_type,boost: :detail :: function :: function_obj_tag)[with Functor = boost :: _ bi :: bind_t> >>,boost :: _ bi :: list1 >>> *> >>>'' ../../../。 ./third-party/boost/1.42.0/boost/function/function_base.hpp:434:從'static void boost :: detail :: function :: functor_manager :: manage(const boost :: detail :: function: :本功能ion_buffer &,boost :: detail :: function :: function_buffer &,boost :: detail :: function :: functor_manager_operation_type)[with Functor = boost :: _ bi :: bind_t> >>,boost :: _ bi :: list1 >> '>>>]' ../../../../third-party/boost/1.42.0/boost/function/function_template.hpp:913:從'void boost :: function0 :: assign_to'實例化(Functor)[with Functor = boost :: _ bi :: bind_t> >>,boost :: _ bi :: list1 >> * >> >>,R = int]' ../../../../第三方/ boost/1.42.0/boost/function/function_template.hpp:722:從'boost :: function0 :: function0(Functor,typename boost :: enable_if_c :: type)實例化[with Functor = boost :: _ bi :: bind_t> >>,boost :: _ bi :: list1 >>> >>>,R = int]' ../../../../third-party/boost/1.42.0/boost /功能/ function_template。hpp:1064:從'boost :: function :: function(Functor,typename boost :: enable_if_c :: type)[使用Functor = boost :: _ bi :: bind_t>>>,boost :: _ bi :: list1>> *>>>,R = int]' ../../../../third-party/boost/1.42.0/boost/function/function_template.hpp:1105:從'typename boost :: enable_if_c &> :: type boost :: function :: operator =(Functor)[with Functor = boost :: _ bi :: bind_t> >>,boost :: _ bi :: list1 >>> >>>,R = int] ' ../../../../third-party/boost/1.42.0/boost/asio/ssl/detail/openssl_operation.hpp:134:從'boost :: asio :: ssl ::詳細信息:: openssl_operation :: openssl_operation(boost :: asio :: ssl :: detail :: ssl_primitive_func,Stream &,boost :: asio :: ssl :: detail :: net_buffer &,SSL *,BIO *)[Stream = boost :: asio :: basic_stream_socket>]' ../../../../third-party/boost/1.42。 0/boost/asio/ssl/detail/openssl_stream_service.hpp:510:從'boost :: system :: error_code boost :: asio :: ssl :: detail :: openssl_stream_service :: handshake(boost :: asio :: ssl :: detail :: openssl_stream_service :: impl_struct * &,Stream &,boost :: asio :: ssl :: stream_base :: handshake_type,boost :: system :: error_code &)[with Stream = boost :: asio :: basic_stream_socket> ]' ../../../../third-party/boost/1.42.0/boost/asio/ssl/stream_service.hpp:100:從'boost :: system :: error_code boost :: instantiated':: asio :: ssl :: stream_service :: handshake(boost :: asio :: ssl :: detail :: openssl_stream_service :: impl_struct * &,Stream &,boost :: asio :: ssl :: stream_base :: handshake_type,boost :: system :: error_code &)[with Stream = boost :: asio :: basic_stream_socket>]' .. /../../../third-party/boost/1.42.0/boost/asio/ssl/stream.hpp:207:從'boost :: system :: error_code boost :: asio :: ssl: :stream :: handshake(boost :: asio :: ssl :: stream_base :: handshake_type,boost :: system :: error_code &)[with Stream = boost :: asio :: basic_stream_socket>,Service = boost :: asio :: SSL :: stream_service]」 ../sockets/socket_ssl_cli.h:45:從這裏