diff options
| -rw-r--r-- | libcxx/include/random | 2 | ||||
| -rw-r--r-- | libcxx/src/random.cpp | 26 |
2 files changed, 28 insertions, 0 deletions
diff --git a/libcxx/include/random b/libcxx/include/random index c5f7584994f..e5c08bcd4df 100644 --- a/libcxx/include/random +++ b/libcxx/include/random @@ -3475,7 +3475,9 @@ typedef shuffle_order_engine<minstd_rand0, 256> knuth_b; class _LIBCPP_TYPE_VIS random_device { +#if !defined(_WIN32) int __f_; +#endif // defined(_WIN32) public: // types typedef unsigned result_type; diff --git a/libcxx/src/random.cpp b/libcxx/src/random.cpp index 97a40c509dc..47cdee402b7 100644 --- a/libcxx/src/random.cpp +++ b/libcxx/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 @@ random_device::operator()() read(__f_, &r, sizeof(r)); return r; } +#endif // defined(_WIN32) double random_device::entropy() const _NOEXCEPT |
