w32pthreads: always use Vista+ API, drop XP support

This removes the XP compatibility code, and switches entirely to SWR
locks, which are available starting at Windows Vista.

This removes CRITICAL_SECTION use, which allows us to add
PTHREAD_MUTEX_INITIALIZER, which will be useful later.

Windows XP is hereby not a supported build target anymore. It was
decided in a project vote that this is OK.

1 files changed, 7 insertions, 6 deletions

diff --git a/configure b/configure
index d3187d71ed..19a0f310cf 100755
--- a/configure
+++ b/configure
@@ -2092,7 +2092,6 @@ TOOLCHAIN_FEATURES="
 "
 
 TYPES_LIST="
-    CONDITION_VARIABLE_Ptr
     kCMVideoCodecType_HEVC
     socklen_t
     struct_addrinfo
@@ -5159,6 +5158,8 @@ probe_libc(){
         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
         eval test \$${pfx_no_}cc_type = "gcc" &&
             add_${pfx}cppflags -D__printf__=__gnu_printf__
+        check_${pfx}cpp_condition windows.h "!defined(_WIN32_WINNT) || _WIN32_WINNT < 0x0600" &&
+            add_${pfx}cppflags -D_WIN32_WINNT=0x0600
     elif check_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
          check_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
         eval ${pfx}libc_type=mingw32
@@ -5168,8 +5169,8 @@ probe_libc(){
         add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
         check_${pfx}cpp_condition _mingw.h "__MSVCRT_VERSION__ < 0x0700" &&
             add_${pfx}cppflags -D__MSVCRT_VERSION__=0x0700
-        check_${pfx}cpp_condition windows.h "defined(_WIN32_WINNT) && _WIN32_WINNT < 0x0502" &&
-            add_${pfx}cppflags -D_WIN32_WINNT=0x0502
+        check_${pfx}cpp_condition windows.h "!defined(_WIN32_WINNT) || _WIN32_WINNT < 0x0600" &&
+            add_${pfx}cppflags -D_WIN32_WINNT=0x0600
         eval test \$${pfx_no_}cc_type = "gcc" &&
             add_${pfx}cppflags -D__printf__=__gnu_printf__
     elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
@@ -5189,14 +5190,14 @@ probe_libc(){
         # 0x601 by default unless something else is set by the user.
         # This can easily lead to us detecting functions only present
         # in such new versions and producing binaries requiring windows 7.0.
-        # Therefore explicitly set the default to XP unless the user has
+        # Therefore explicitly set the default to Vista unless the user has
         # set something else on the command line.
         # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
         # family. For these cases, configure is free to use any functions
         # found in the SDK headers by default. (Alternatively, we could force
         # _WIN32_WINNT to 0x0602 in that case.)
         check_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
-            { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0502; }
+            { check_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0600; }
 #ifdef WINAPI_FAMILY
 #include <winapifamily.h>
 #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
@@ -5674,7 +5675,6 @@ check_func_headers windows.h SetConsoleTextAttribute
 check_func_headers windows.h SetConsoleCtrlHandler
 check_func_headers windows.h Sleep
 check_func_headers windows.h VirtualAlloc
-check_struct windows.h "CONDITION_VARIABLE" Ptr
 check_func_headers glob.h glob
 enabled xlib &&
     check_func_headers "X11/Xlib.h X11/extensions/Xvlib.h" XvGetPortAttribute -lXv -lX11 -lXext
@@ -5758,6 +5758,7 @@ check_cpp_condition windows.h "!WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP
 
 if ! disabled w32threads && ! enabled pthreads; then
     check_func_headers "windows.h process.h" _beginthreadex &&
+        check_type "windows.h" CONDITION_VARIABLE &&
         enable w32threads || disable w32threads
     if ! enabled w32threads && enabled winrt; then
         check_func_headers "windows.h" CreateThread &&