Avoid use of gettimeofday() on Windows (not implemented on MSVC).

Also, drop handling of an impossible error.  A local variable on the stack
is quite likely to be within the process' address space.  And even for some
reason (?!?) it'd be not, the very next line will give us a nice SIGSEGV
anyway :)

1 files changed, 19 insertions, 9 deletions

diff --git a/crawl-ref/source/l_crawl.cc b/crawl-ref/source/l_crawl.cc
index 4e35801587..56149d2c65 100644
--- a/crawl-ref/source/l_crawl.cc
+++ b/crawl-ref/source/l_crawl.cc
@@ -43,8 +43,12 @@ module "crawl"
 #include "view.h"
 #include "worley.h"
 
-#include <sys/time.h>
-#include <time.h>
+#ifdef TARGET_OS_WINDOWS
+# include "windows.h"
+#else
+# include <sys/time.h>
+# include <time.h>
+#endif
 
 /////////////////////////////////////////////////////////////////////
 // User accessible
@@ -1112,15 +1116,21 @@ LUAFN(_crawl_redraw_stats)
 
 LUAFN(_crawl_millis)
 {
+#ifdef TARGET_OS_WINDOWS
+    // MSVC has no gettimeofday().
+    FILETIME ft;
+    GetSystemTimeAsFileTime(&ft);
+    uint64_t tt = ft.dwHighDateTime;
+    tt <<= 32;
+    tt |= ft.dwLowDateTime;
+    tt /= 10000;
+    tt -= 11644473600000ULL;
+    lua_pushnumber(ls, tt);
+#else
     struct timeval tv;
-    const int error = gettimeofday(&tv, nullptr);
-    if (error)
-    {
-        luaL_error(ls, make_stringf("Failed to get time: %s",
-                                    strerror(error)).c_str());
-    }
-
+    gettimeofday(&tv, nullptr);
     lua_pushnumber(ls, tv.tv_sec * 1000 + tv.tv_usec / 1000);
+#endif
     return 1;
 }