patch by Yaron: Uses rand_s() from stdlib.h (when building for Windows)
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@192325 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/src/random.cpp b/src/random.cpp
index 97a40c5..47cdee4 100644
--- a/src/random.cpp
+++ b/src/random.cpp
@@ -7,6 +7,12 @@
//
//===----------------------------------------------------------------------===//
+#if defined(_WIN32)
+// Must be defined before including stdlib.h to enable rand_s().
+#define _CRT_RAND_S
+#include <stdio.h>
+#endif
+
#include "random"
#include "system_error"
@@ -19,6 +25,25 @@
_LIBCPP_BEGIN_NAMESPACE_STD
+#if defined(_WIN32)
+random_device::random_device(const string&)
+{
+}
+
+random_device::~random_device()
+{
+}
+
+unsigned
+random_device::operator()()
+{
+ unsigned r;
+ errno_t err = rand_s(&r);
+ if (err)
+ __throw_system_error(err, "random_device rand_s failed.");
+ return r;
+}
+#else
random_device::random_device(const string& __token)
: __f_(open(__token.c_str(), O_RDONLY))
{
@@ -38,6 +63,7 @@
read(__f_, &r, sizeof(r));
return r;
}
+#endif // defined(_WIN32)
double
random_device::entropy() const _NOEXCEPT
