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coroutine: fix standard_allocator issue for Windows

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[SVN r86567]
This commit is contained in:
Oliver Kowalke 2013-11-05 20:14:45 +00:00
parent c6e664445d
commit 4501cc7f31
1 changed files with 58 additions and 67 deletions
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125
src/detail/standard_stack_allocator_windows.cpp
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@ -7,31 +7,40 @@
#include "boost/coroutine/detail/standard_stack_allocator.hpp"
extern "C" {
#include <fcntl.h>
#include <signal.h>
#include <sys/mman.h>
#include <sys/resource.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#include <windows.h>
}
//#if _POSIX_C_SOURCE >= 200112L
//#if defined (BOOST_WINDOWS) || _POSIX_C_SOURCE >= 200112L
#include <algorithm>
#include <cmath>
#include <cstddef>
#include <cstring>
#include <stdexcept>
#include <boost/assert.hpp>
#include <boost/context/detail/config.hpp>
#include <boost/context/fcontext.hpp>
#include <boost/coroutine/stack_context.hpp>
#if !defined (SIGSTKSZ)
# define SIGSTKSZ (8 * 1024)
# define UDEF_SIGSTKSZ
# if defined(BOOST_MSVC)
# pragma warning(push)
# pragma warning(disable:4244 4267)
# endif
// x86_64
// test x86_64 before i386 because icc might
// define __i686__ for x86_64 too
#if defined(__x86_64__) || defined(__x86_64) \
|| defined(__amd64__) || defined(__amd64) \
|| defined(_M_X64) || defined(_M_AMD64)
// Windows seams not to provide a constant or function
// telling the minimal stacksize
# define MIN_STACKSIZE 8 * 1024
#else
# define MIN_STACKSIZE 4 * 1024
#endif
#ifdef BOOST_HAS_ABI_HEADERS
@ -42,64 +51,59 @@ namespace boost {
namespace coroutines {
namespace detail {
SYSTEM_INFO system_info_()
{
SYSTEM_INFO si;
::GetSystemInfo( & si);
return si;
}
SYSTEM_INFO system_info()
{
static SYSTEM_INFO si = system_info_();
return si;
}
std::size_t pagesize()
{
// conform to POSIX.1-2001
static std::size_t size = ::sysconf( _SC_PAGESIZE);
return size;
}
rlimit stacksize_limit_()
{
rlimit limit;
// conforming to POSIX.1-2001
#if defined(BOOST_DISABLE_ASSERTS)
::getrlimit( RLIMIT_STACK, & limit);
#else
const int result = ::getrlimit( RLIMIT_STACK, & limit);
BOOST_ASSERT( 0 == result);
#endif
return limit;
}
rlimit stacksize_limit()
{
static rlimit limit = stacksize_limit_();
return limit;
}
{ return static_cast< std::size_t >( system_info().dwPageSize); }
std::size_t page_count( std::size_t stacksize)
{
return static_cast< std::size_t >(
return static_cast< std::size_t >(
std::floor(
static_cast< float >( stacksize) / pagesize() ) );
}
// Windows seams not to provide a limit for the stacksize
bool
standard_stack_allocator::is_stack_unbound()
{ return RLIM_INFINITY == detail::stacksize_limit().rlim_max; }
{ return true; }
std::size_t
standard_stack_allocator::default_stacksize()
{
std::size_t size = 8 * minimum_stacksize();
if ( is_stack_unbound() ) return size;
std::size_t size = 64 * 1024; // 64 kB
if ( is_stack_unbound() )
return (std::max)( size, minimum_stacksize() );
BOOST_ASSERT( maximum_stacksize() >= minimum_stacksize() );
return maximum_stacksize() == size
? size
: (std::min)( size, maximum_stacksize() );
return maximum_stacksize() == minimum_stacksize()
? minimum_stacksize()
: ( std::min)( size, maximum_stacksize() );
}
// because Windows seams not to provide a limit for minimum stacksize
std::size_t
standard_stack_allocator::minimum_stacksize()
{ return SIGSTKSZ + sizeof( context::fcontext_t) + 15; }
{ return MIN_STACKSIZE; }
// because Windows seams not to provide a limit for maximum stacksize
// maximum_stacksize() can never be called (pre-condition ! is_stack_unbound() )
std::size_t
standard_stack_allocator::maximum_stacksize()
{
BOOST_ASSERT( ! is_stack_unbound() );
return static_cast< std::size_t >( detail::stacksize_limit().rlim_max);
return 1 * 1024 * 1024 * 1024; // 1GB
}
void
@ -110,30 +114,22 @@ standard_stack_allocator::allocate( stack_context & ctx, std::size_t size)
const std::size_t pages( detail::page_count( size) ); // page at bottom will be used as guard-page
BOOST_ASSERT_MSG( 2 <= pages, "at least two pages must fit into stack (one page is guard-page)");
const std::size_t size_( pages * detail::pagesize() );
const std::size_t size_ = pages * detail::pagesize();
BOOST_ASSERT( 0 < size && 0 < size_);
BOOST_ASSERT( size_ <= size);
const int fd( ::open("/dev/zero", O_RDONLY) );
BOOST_ASSERT( -1 != fd);
// conform to POSIX.4 (POSIX.1b-1993, _POSIX_C_SOURCE=199309L)
void * limit =
# if defined(macintosh) || defined(__APPLE__) || defined(__APPLE_CC__)
::mmap( 0, size_, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0);
# else
::mmap( 0, size_, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
# endif
::close( fd);
void * limit = ::VirtualAlloc( 0, size_, MEM_COMMIT, PAGE_READWRITE);
if ( ! limit) throw std::bad_alloc();
std::memset( limit, '\0', size_);
// conforming to POSIX.1-2001
DWORD old_options;
#if defined(BOOST_DISABLE_ASSERTS)
::mprotect( limit, detail::pagesize(), PROT_NONE);
::VirtualProtect(
limit, detail::pagesize(), PAGE_READWRITE | PAGE_GUARD /*PAGE_NOACCESS*/, & old_options);
#else
const int result( ::mprotect( limit, detail::pagesize(), PROT_NONE) );
BOOST_ASSERT( 0 == result);
const BOOL result = ::VirtualProtect(
limit, detail::pagesize(), PAGE_READWRITE | PAGE_GUARD /*PAGE_NOACCESS*/, & old_options);
BOOST_ASSERT( FALSE != result);
#endif
ctx.size = size_;
@ -148,8 +144,7 @@ standard_stack_allocator::deallocate( stack_context & ctx)
BOOST_ASSERT( is_stack_unbound() || ( maximum_stacksize() >= ctx.size) );
void * limit = static_cast< char * >( ctx.sp) - ctx.size;
// conform to POSIX.4 (POSIX.1b-1993, _POSIX_C_SOURCE=199309L)
::munmap( limit, ctx.size);
::VirtualFree( limit, 0, MEM_RELEASE);
}
}}}
@ -157,7 +152,3 @@ standard_stack_allocator::deallocate( stack_context & ctx)
#ifdef BOOST_HAS_ABI_HEADERS
# include BOOST_ABI_SUFFIX
#endif
#ifdef UDEF_SIGSTKSZ
# undef SIGSTKSZ
#endif