Update copyright years.

[thirdparty/gcc.git] / libstdc++-v3 / src / c++11 / random.cc

diff --git a/libstdc++-v3/src/c++11/random.cc b/libstdc++-v3/src/c++11/random.cc
index 9872e28b29d47d88501be2cf34597e7362f7ddb4..b4bf0a785fb98119f1dbb33fa7d1671602215e45 100644 (file)
--- a/libstdc++-v3/src/c++11/random.cc
+++ b/libstdc++-v3/src/c++11/random.cc
@@ -1,6 +1,6 @@
 // random -*- C++ -*-
 
-// Copyright (C) 2012-2023 Free Software Foundation, Inc.
+// Copyright (C) 2012-2024 Free Software Foundation, Inc.
 //
 // This file is part of the GNU ISO C++ Library.  This library is free
 // software; you can redistribute it and/or modify it under the
@@ -26,8 +26,7 @@
 #define _CRT_RAND_S // define this before including <stdlib.h> to get rand_s
 
 #include <random>
-
-#ifdef  _GLIBCXX_USE_C99_STDINT_TR1
+#include <system_error>
 
 #if defined __i386__ || defined __x86_64__
 # include <cpuid.h>
@@ -94,6 +93,11 @@ namespace std _GLIBCXX_VISIBILITY(default)
 {
   namespace
   {
+    [[noreturn]]
+    inline void
+    __throw_syserr([[maybe_unused]] int e, [[maybe_unused]] const char* msg)
+    { _GLIBCXX_THROW_OR_ABORT(system_error(e, std::generic_category(), msg)); }
+
 #if USE_RDRAND
     unsigned int
     __attribute__ ((target("rdrnd")))
@@ -365,9 +369,18 @@ namespace std _GLIBCXX_VISIBILITY(default)
       which = prng;
 #endif
     else
-      std::__throw_runtime_error(
-         __N("random_device::random_device(const std::string&):"
-             " unsupported token"));
+      std::__throw_syserr(EINVAL, __N("random_device::random_device"
+                                     "(const std::string&):"
+                                     " unsupported token"));
+
+#if defined ENOSYS
+    [[maybe_unused]] const int unsupported = ENOSYS;
+#elif defined ENOTSUP
+    [[maybe_unused]] const int unsupported = ENOTSUP;
+#else
+    [[maybe_unused]] const int unsupported = 0;
+#endif
+    int err = 0;
 
 #ifdef _GLIBCXX_USE_CRT_RAND_S
     if (which & rand_s)
@@ -403,6 +416,7 @@ namespace std _GLIBCXX_VISIBILITY(default)
              return;
            }
        }
+      err = unsupported;
     }
 #endif // USE_RDSEED
 
@@ -423,6 +437,7 @@ namespace std _GLIBCXX_VISIBILITY(default)
              return;
            }
        }
+      err = unsupported;
     }
 #endif // USE_RDRAND
 
@@ -434,6 +449,7 @@ namespace std _GLIBCXX_VISIBILITY(default)
            _M_func = &__ppc_darn;
            return;
          }
+       err = unsupported;
       }
 #endif // USE_DARN
 
@@ -454,6 +470,7 @@ namespace std _GLIBCXX_VISIBILITY(default)
            _M_func = &__libc_getentropy;
            return;
          }
+       err = unsupported;
       }
 #endif // _GLIBCXX_HAVE_GETENTROPY
 
@@ -473,6 +490,7 @@ namespace std _GLIBCXX_VISIBILITY(default)
       if (_M_file)
        return;
 #endif // USE_POSIX_FILE_IO
+      err = errno;
     }
 #endif // _GLIBCXX_USE_DEV_RANDOM
 
@@ -489,9 +507,12 @@ namespace std _GLIBCXX_VISIBILITY(default)
     }
 #endif
 
-    std::__throw_runtime_error(
-       __N("random_device::random_device(const std::string&):"
-           " device not available"));
+    auto msg = __N("random_device::random_device(const std::string&):"
+                  " device not available");
+    if (err)
+      std::__throw_syserr(err, msg);
+    else
+      std::__throw_runtime_error(msg);
 #endif // USE_MT19937
   }
 
@@ -508,8 +529,8 @@ namespace std _GLIBCXX_VISIBILITY(default)
        char* endptr;
        seed = std::strtoul(nptr, &endptr, 0);
        if (*nptr == '\0' || *endptr != '\0')
-         std::__throw_runtime_error(__N("random_device::_M_init_pretr1"
-                                        "(const std::string&)"));
+         std::__throw_syserr(EINVAL, __N("random_device::_M_init_pretr1"
+                                         "(const std::string&)"));
       }
     _M_mt.seed(seed);
 #else
@@ -548,6 +569,7 @@ namespace std _GLIBCXX_VISIBILITY(default)
       }
 #endif
 
+#ifdef _GLIBCXX_USE_DEV_RANDOM
 #ifdef USE_POSIX_FILE_IO
     ::close(_M_fd);
     _M_fd = -1;
@@ -555,6 +577,7 @@ namespace std _GLIBCXX_VISIBILITY(default)
     std::fclose(static_cast<FILE*>(_M_file));
 #endif
     _M_file = nullptr;
+#endif
   }
 
   random_device::result_type
@@ -580,7 +603,7 @@ namespace std _GLIBCXX_VISIBILITY(default)
            p = static_cast<char*>(p) + e;
          }
        else if (e != -1 || errno != EINTR)
-         __throw_runtime_error(__N("random_device could not be read"));
+         __throw_syserr(errno, __N("random_device could not be read"));
       }
     while (n > 0);
 #else // USE_POSIX_FILE_IO
@@ -666,4 +689,3 @@ namespace std _GLIBCXX_VISIBILITY(default)
   template struct __detail::_Mod<unsigned, 2147483647UL, 16807UL, 0UL>;
 #endif
 }
-#endif // _GLIBCXX_USE_C99_STDINT_TR1