Curl_now: figure out windows version in win32_init

... and avoid use of static variables that aren't thread safe.

Fixes regression from e9ababd4f5a (present in the 7.64.0 release)

Reported-by: Paul Groke
Fixes #3572
Closes #3573

1 files changed, 16 insertions, 0 deletions

diff --git a/lib/easy.c b/lib/easy.c
index 6fcad3dec..d2d4166d5 100644
--- a/lib/easy.c
+++ b/lib/easy.c
@@ -75,6 +75,7 @@
 #include "ssh.h"
 #include "setopt.h"
 #include "http_digest.h"
+#include "system_win32.h"
 
 /* The last 3 #include files should be in this order */
 #include "curl_printf.h"
@@ -95,6 +96,11 @@ static void win32_cleanup(void)
 #endif
 }
 
+#ifdef WIN32
+LARGE_INTEGER Curl_freq;
+bool Curl_isVistaOrGreater;
+#endif
+
 /* win32_init() performs win32 socket initialization to properly setup the
    stack to allow networking */
 static CURLcode win32_init(void)
@@ -144,6 +150,16 @@ static CURLcode win32_init(void)
   }
 #endif
 
+#ifdef WIN32
+  if(Curl_verify_windows_version(6, 0, PLATFORM_WINNT,
+                                 VERSION_GREATER_THAN_EQUAL)) {
+    Curl_isVistaOrGreater = TRUE;
+    QueryPerformanceFrequency(&Curl_freq);
+  }
+  else
+    Curl_isVistaOrGreater = FALSE;
+#endif
+
   return CURLE_OK;
 }