Move clock_gettime & mmap ports to win.h

run.c

@@ -16,7 +16,7 @@ Then run with:
 #include <fcntl.h>
 
 #if defined(_WIN32)
-    #include "mmap-windows.c"
+    #include "win.h"
 #else
     #include <unistd.h>
     #include <sys/mman.h>
@@ -364,17 +364,12 @@ int argmax(float* v, int n) {
 long time_in_ms() {
     struct timespec time;
     // Get the current time with nanosecond precision
-#if defined(_WIN32)
-    timespec_get(&time, TIME_UTC);
-    return time.tv_sec * 1000 + time.tv_nsec / 1000000;
-#else
     if (clock_gettime(CLOCK_REALTIME, &time) == 0) {
         return time.tv_sec * 1000 + time.tv_nsec / 1000000;
     } else {
         perror("clock_gettime");
         return -1; // Return -1 to indicate an error
     }
-#endif
 }
 
 int main(int argc, char *argv[]) {

mmap-windows.c → win.h

@@ -1,3 +1,9 @@
+/*
+ * Windows Compatibility headers
+ * This source contains compatible versions of mmap & clock_gettime functions
+ * ported for Windows OS
+ */
+
 /* mmap() replacement for Windows
  *
  * Author: Mike Frysinger <[email protected]>
@@ -98,3 +104,12 @@ static void munmap(void *addr, size_t length)
 
 #undef DWORD_HI
 #undef DWORD_LO
+
+// define undeclared constant
+#define CLOCK_REALTIME 0
+
+// define simple clock_gettime alternative for Windows
+int clock_gettime(int _, struct timespec *tv)
+{
+    return timespec_get(tv, TIME_UTC) != 0 ? 0 : 1;
+}