8345589: Simplify Windows definition of strtok_r

Reviewed-by: dholmes, jwaters

src/hotspot/share/runtime/os.hpp

@@ -28,8 +28,9 @@
 #include "jvm_md.h"
 #include "runtime/osInfo.hpp"
 #include "utilities/exceptions.hpp"
-#include "utilities/ostream.hpp"
+#include "utilities/globalDefinitions.hpp"
 #include "utilities/macros.hpp"
+#include "utilities/ostream.hpp"
 #ifdef __APPLE__
 # include <mach/mach_time.h>
 #endif
@@ -1027,14 +1028,6 @@ class os: AllStatic {
   class Posix;
 #endif
 
-  // FIXME - some random stuff that was in os_windows.hpp
-#ifdef _WINDOWS
-  // strtok_s is the Windows thread-safe equivalent of POSIX strtok_r
-# define strtok_r strtok_s
-# define S_ISCHR(mode)   (((mode) & _S_IFCHR) == _S_IFCHR)
-# define S_ISFIFO(mode)  (((mode) & _S_IFIFO) == _S_IFIFO)
-#endif
-
 #ifndef OS_NATIVE_THREAD_CREATION_FAILED_MSG
 #define OS_NATIVE_THREAD_CREATION_FAILED_MSG "unable to create native thread: possibly out of memory or process/resource limits reached"
 #endif

src/hotspot/share/utilities/globalDefinitions_visCPP.hpp

@@ -37,6 +37,7 @@
 # include <stdlib.h>
 # include <stdint.h>
 # include <stddef.h>// for offsetof
+# include <sys/stat.h>
 # include <io.h>    // for stream.cpp
 # include <float.h> // for _isnan
 # include <stdio.h> // for va_list
@@ -80,6 +81,18 @@ inline int strncasecmp(const char *s1, const char *s2, size_t n) {
   return _strnicmp(s1,s2,n);
 }
 
+// VS doesn't provide strtok_r, which is a POSIX function.  Instead, it
+// provides the same function under the name strtok_s.  Note that this is
+// *not* the same as the C99 Annex K strtok_s.  VS provides that function
+// under the name strtok_s_l.  Make strtok_r a synonym so we can use that name
+// in shared code.
+const auto strtok_r = strtok_s;
+
+// VS doesn't provide POSIX macros S_ISFIFO or S_IFIFO.  It doesn't even
+// provide _S_ISFIFO, per its usual naming convention for POSIX stuff.  But it
+// does provide _S_IFIFO, so we can roll our own S_ISFIFO.
+#define S_ISFIFO(mode) (((mode) & _S_IFIFO) == _S_IFIFO)
+
 // Checking for nanness
 
 inline int g_isnan(jfloat  f)                    { return _isnan(f); }