Cleanup the uv_import check

The uv_import() is not needed anymore, so we can remove the autoconf
check for it.

config.h.win32

@@ -379,13 +379,10 @@ typedef __int64 off_t;
 #define SSL_CTX_UP_REF 1
 
 /* Define to 1 if you have the `uv_handle_get_data' function. */
-@HAVE_UV_HANDLE_GET_DATA@
+#define HAVE_UV_HANDLE_GET_DATA 1
 
 /* Define to 1 if you have the `uv_handle_set_data' function. */
-@HAVE_UV_HANDLE_SET_DATA@
-
-/* Define to 1 if you have the `uv_import' function. */
-@HAVE_UV_IMPORT@
+#define HAVE_UV_HANDLE_SET_DATA 1
 
 /* GSSAPI Related defines */
 @HAVE_GSSAPI@

configure.ac

@@ -600,7 +600,7 @@ LIBS="$LIBS $LIBUV_LIBS"
 
 # Those functions are only provided in newer versions of libuv, we'll be emulating them
 # for now
-AC_CHECK_FUNCS([uv_handle_get_data uv_handle_set_data uv_import uv_udp_connect uv_translate_sys_error uv_sleep])
+AC_CHECK_FUNCS([uv_handle_get_data uv_handle_set_data uv_udp_connect uv_translate_sys_error uv_sleep])
 AX_RESTORE_FLAGS([libuv])
 
 # libnghttp2

util/copyrights

@@ -2260,4 +2260,3 @@
 ./win32utils/Configure				PERL	2013,2014,2015,2016,2017,2018,2019,2020,2021
 ./win32utils/GeoIP.diff				X	2013,2018,2019,2020,2021
 ./win32utils/bind9.sln.in			X	2013,2014,2015,2016,2017,2018,2019,2020
-./win32utils/libuv.diff				X	2020,2021

win32utils/Configure

@@ -172,9 +172,6 @@ my @substdefh = ("PACKAGE_VERSION_MAJOR",
                  "WITH_IDN",
                  "CPU_RELAX",
                  "VALIDATION_DEFAULT",
-                 "HAVE_UV_HANDLE_GET_DATA",
-                 "HAVE_UV_HANDLE_SET_DATA",
-                 "HAVE_UV_IMPORT",
     );
 
 # for platform.h
@@ -1276,13 +1273,6 @@ if ($use_libuv eq "auto") {
     if ($use_libuv eq "auto") {
         die "can't find an libuv built directory at sibling root\n";
     }
-
-    # When a libuv version exposing uv_import() and uv_export() is released, the
-    # following three config.h macros will need to be conditionally defined for
-    # that libuv version and all later ones.
-    # $configdefh{"HAVE_UV_HANDLE_SET_DATA"} = 1;
-    # $configdefh{"HAVE_UV_HANDLE_GET_DATA"} = 1;
-    # $configdefh{"HAVE_UV_IMPORT"} = 1;
 }
 # falls into (so no else)
 if ($use_libuv eq "yes") {
@@ -1309,12 +1299,6 @@ if ($use_libuv eq "yes") {
     $configinc{"LIBUV_INC"} = "$libuv_inc";
     $configlib{"LIBUV_LIB"} = "$libuv_lib";
     $configdll{"LIBUV_DLL"} = "$libuv_dll";
-    # When a libuv version exposing uv_import() and uv_export() is released, the
-    # following three config.h macros will need to be conditionally defined for
-    # that libuv version and all later ones.
-    # $configdefh{"HAVE_UV_HANDLE_SET_DATA"} = 1;
-    # $configdefh{"HAVE_UV_HANDLE_GET_DATA"} = 1;
-    # $configdefh{"HAVE_UV_IMPORT"} = 1;
 }
 
 # with-nghttp2

win32utils/libuv.diff

@@ -1,27 +0,0 @@
-To make TCP listening properly multithreaded, we need to have the
-uv_export() and uv_import() functions that were removed from libuv.
-The alternative is passing sockets over IPC, which is complicated and
-error prone.
-
-To make it simple, we export two internal functions from libuv; they will
-be used in lib/isc/netmgr/uv-compat.c by our versions of the uv_export()
-and uv_import() functions.
-
-diff --git a/src/win/internal.h b/src/win/internal.h
-index 058ddb8e..a9dc4168 100644
---- a/src/win/internal.h
-+++ b/src/win/internal.h
-@@ -92,11 +92,11 @@ void uv_process_tcp_connect_req(uv_loop_t* loop, uv_tcp_t* handle,
- void uv_tcp_close(uv_loop_t* loop, uv_tcp_t* tcp);
- void uv_tcp_endgame(uv_loop_t* loop, uv_tcp_t* handle);
- 
--int uv__tcp_xfer_export(uv_tcp_t* handle,
-+UV_EXTERN int uv__tcp_xfer_export(uv_tcp_t* handle,
-                         int pid,
-                         uv__ipc_socket_xfer_type_t* xfer_type,
-                         uv__ipc_socket_xfer_info_t* xfer_info);
--int uv__tcp_xfer_import(uv_tcp_t* tcp,
-+UV_EXTERN int uv__tcp_xfer_import(uv_tcp_t* tcp,
-                         uv__ipc_socket_xfer_type_t xfer_type,
-                         uv__ipc_socket_xfer_info_t* xfer_info);
-