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mars Show standard_stack_allocator.hpp Source code

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  1.  
  2. //          Copyright Oliver Kowalke 2009.
  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. #ifndef BOOST_COROUTINES_STANDARD_STACK_ALLOCATOR_H
  8. #define BOOST_COROUTINES_STANDARD_STACK_ALLOCATOR_H
  9.  
  10. #if defined(BOOST_USE_VALGRIND)
  11. #include <valgrind/valgrind.h>
  12. #endif
  13.  
  14. #include <cstddef>
  15. #include <cstdlib>
  16. #include <new>
  17.  
  18. #include <boost/assert.hpp>
  19. #include <boost/config.hpp>
  20.  
  21. #include <boost/coroutine/detail/config.hpp>
  22. #include <boost/coroutine/stack_context.hpp>
  23. #include <boost/coroutine/stack_traits.hpp>
  24.  
  25. #ifdef BOOST_HAS_ABI_HEADERS
  26. #  include BOOST_ABI_PREFIX
  27. #endif
  28.  
  29. namespace mars_boost {} namespace boost = mars_boost; namespace mars_boost {
  30. namespace coroutines {
  31.  
  32. template< typename traitsT >
  33. struct basic_standard_stack_allocator
  34. {
  35.     typedef traitsT traits_type;
  36.  
  37.     void allocate( stack_context & ctx, std::size_t size = traits_type::minimum_size() )
  38.     {
  39.         BOOST_ASSERT( traits_type::minimum_size() <= size);
  40.         BOOST_ASSERT( traits_type::is_unbounded() || ( traits_type::maximum_size() >= size) );
  41.  
  42.         void * limit = std::malloc( size);
  43.         if ( ! limit) mars_boost::throw_exception(std::bad_alloc());//throw std::bad_alloc();
  44.  
  45.         ctx.size = size;
  46.         ctx.sp = static_cast< char * >( limit) + ctx.size;
  47. #if defined(BOOST_USE_VALGRIND)
  48.         ctx.valgrind_stack_id = VALGRIND_STACK_REGISTER( ctx.sp, limit);
  49. #endif
  50.     }
  51.  
  52.     void deallocate( stack_context & ctx)
  53.     {
  54.         BOOST_ASSERT( ctx.sp);
  55.         BOOST_ASSERT( traits_type::minimum_size() <= ctx.size);
  56.         BOOST_ASSERT( traits_type::is_unbounded() || ( traits_type::maximum_size() >= ctx.size) );
  57.  
  58. #if defined(BOOST_USE_VALGRIND)
  59.         VALGRIND_STACK_DEREGISTER( ctx.valgrind_stack_id);
  60. #endif
  61.  
  62.         void * limit = static_cast< char * >( ctx.sp) - ctx.size;
  63.         std::free( limit);
  64.     }
  65. };
  66.  
  67. typedef basic_standard_stack_allocator< stack_traits >  standard_stack_allocator;
  68.  
  69. }}
  70.  
  71. #ifdef BOOST_HAS_ABI_HEADERS
  72. #  include BOOST_ABI_SUFFIX
  73. #endif
  74.  
  75. #endif // BOOST_COROUTINES_STANDARD_STACK_ALLOCATOR_H
  76.  
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