libc/src/stdlib/rand_util.cpp

   1 //===-- Shared utility for rand -------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "src/stdlib/rand_util.h"
  10 #include "src/__support/CPP/atomic.h"
  11 #include "src/__support/macros/attributes.h"
  12 #include "src/__support/macros/config.h"
  13
  14 namespace LIBC_NAMESPACE_DECL {
  15
  16 // C standard 7.10p2: If 'rand' is called before 'srand' it is to
  17 // proceed as if the 'srand' function was called with a value of '1'.
  18 cpp::Atomic<unsigned long> rand_next = 1;
  19
  20 } // namespace LIBC_NAMESPACE_DECL