3 files changed, 34 insertions, 0 deletions

diff --git a/src/platform/platform_interface.h b/src/platform/platform_interface.h
index 42cfae23..22f78166 100644
--- a/src/platform/platform_interface.h
+++ b/src/platform/platform_interface.h
@@ -133,4 +133,10 @@
 #define MHD_INVALID_PIPE_ MHD_INVALID_SOCKET
 #endif
 
+#if !defined(_WIN32) || defined(__CYGWIN__)
+#define MHD_random_() random()
+#else
+#define MHD_random_() MHD_W32_random()
+#endif
+
 #endif // MHD_PLATFORM_INTERFACE_H
diff --git a/src/platform/w32functions.c b/src/platform/w32functions.c
index 34c5d73d..3c25e2b2 100644
--- a/src/platform/w32functions.c
+++ b/src/platform/w32functions.c
@@ -27,6 +27,8 @@
 #include <errno.h>
 #include <winsock2.h>
 #include <string.h>
+#include <stdint.h>
+#include <time.h>
 
 /**
  * Return errno equivalent of last winsock error
@@ -618,3 +620,22 @@ int MHD_W32_pair_of_sockets_(SOCKET sockets_pair[2])
   sockets_pair[1] = INVALID_SOCKET;
   return -1;
 }
+
+/**
+ * Static variable used by pseudo random number generator
+ */
+static int32_t rnd_val = 0;
+/**
+ * Generate 31-bit pseudo random number.
+ * Function initialize itself at first call to current time.
+ * @return 31-bit pseudo random number.
+ */
+int MHD_W32_random(void)
+{
+  if (0 == rnd_val)
+    rnd_val = (int32_t)time(NULL);
+  /* stolen from winsup\cygwin\random.cc */
+  rnd_val = (16807 * (rnd_val % 127773) - 2836 * (rnd_val / 127773))
+               & 0x7fffffff;
+  return (int)rnd_val;
+}
diff --git a/src/platform/w32functions.h b/src/platform/w32functions.h
index 2c0cdcff..7a25803b 100644
--- a/src/platform/w32functions.h
+++ b/src/platform/w32functions.h
@@ -177,6 +177,13 @@ void MHD_W32_set_last_winsock_error_(int errnum);
  * @return zero on success, -1 otherwise
  */
 int MHD_W32_pair_of_sockets_(SOCKET sockets_pair[2]);
+/**
+ * Generate 31-bit pseudo random number.
+ * Function initialize itself at first call to current time.
+ * @return 31-bit pseudo random number.
+ */
+_MHD_EXTERN int MHD_W32_random(void); /* must be exported for "make check" tests */
+                                      /* TODO: exclude from exports */
 
 #ifdef __cplusplus
 }