ceph/src/boost/libs/context/src/windows/stack_traits.cpp

   1
   2 //          Copyright Oliver Kowalke 2014.
   3 // Distributed under the Boost Software License, Version 1.0.
   4 //    (See accompanying file LICENSE_1_0.txt or copy at
   5 //          http://www.boost.org/LICENSE_1_0.txt)
   6
   7 #include "boost/context/stack_traits.hpp"
   8
   9 extern "C" {
  10 #include <windows.h>
  11 }
  12
  13 //#if defined (BOOST_WINDOWS) || _POSIX_C_SOURCE >= 200112L
  14
  15 #include <algorithm>
  16 #include <cmath>
  17 #include <cstddef>
  18 #include <cstring>
  19 #include <stdexcept>
  20
  21 #include <boost/assert.hpp>
  22 #include <boost/context/detail/config.hpp>
  23
  24 #include <boost/context/stack_context.hpp>
  25
  26 // x86_64
  27 // test x86_64 before i386 because icc might
  28 // define __i686__ for x86_64 too
  29 #if defined(__x86_64__) || defined(__x86_64) \
  30     || defined(__amd64__) || defined(__amd64) \
  31     || defined(_M_X64) || defined(_M_AMD64)
  32
  33 // Windows seams not to provide a constant or function
  34 // telling the minimal stacksize
  35 # define MIN_STACKSIZE  8 * 1024
  36 #else
  37 # define MIN_STACKSIZE  4 * 1024
  38 #endif
  39
  40 #ifdef BOOST_HAS_ABI_HEADERS
  41 #  include BOOST_ABI_PREFIX
  42 #endif
  43
  44 namespace {
  45
  46 std::size_t pagesize() BOOST_NOEXCEPT_OR_NOTHROW {
  47     SYSTEM_INFO si;
  48     ::GetSystemInfo(&si);
  49     return static_cast< std::size_t >( si.dwPageSize );
  50 }
  51
  52 }
  53
  54 namespace boost {
  55 namespace context {
  56
  57 // Windows seams not to provide a limit for the stacksize
  58 // libcoco uses 32k+4k bytes as minimum
  59 BOOST_CONTEXT_DECL
  60 bool
  61 stack_traits::is_unbounded() BOOST_NOEXCEPT_OR_NOTHROW {
  62     return true;
  63 }
  64
  65 BOOST_CONTEXT_DECL
  66 std::size_t
  67 stack_traits::page_size() BOOST_NOEXCEPT_OR_NOTHROW {
  68     static std::size_t size = pagesize();
  69     return size;
  70 }
  71
  72 BOOST_CONTEXT_DECL
  73 std::size_t
  74 stack_traits::default_size() BOOST_NOEXCEPT_OR_NOTHROW {
  75     return 128 * 1024;
  76 }
  77
  78 // because Windows seams not to provide a limit for minimum stacksize
  79 BOOST_CONTEXT_DECL
  80 std::size_t
  81 stack_traits::minimum_size() BOOST_NOEXCEPT_OR_NOTHROW {
  82     return MIN_STACKSIZE;
  83 }
  84
  85 // because Windows seams not to provide a limit for maximum stacksize
  86 // maximum_size() can never be called (pre-condition ! is_unbounded() )
  87 BOOST_CONTEXT_DECL
  88 std::size_t
  89 stack_traits::maximum_size() BOOST_NOEXCEPT_OR_NOTHROW {
  90     BOOST_ASSERT( ! is_unbounded() );
  91     return  1 * 1024 * 1024 * 1024; // 1GB
  92 }
  93
  94 }}
  95
  96 #ifdef BOOST_HAS_ABI_HEADERS
  97 #  include BOOST_ABI_SUFFIX
  98 #endif