| 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 <signal.h> |
| 11 | #include <sys/resource.h> |
| 12 | #include <sys/time.h> |
| 13 | #include <unistd.h> |
| 14 | } |
| 15 | |
| 16 | //#if _POSIX_C_SOURCE >= 200112L |
| 17 | |
| 18 | #include <algorithm> |
| 19 | #include <cmath> |
| 20 | |
| 21 | #include <boost/assert.hpp> |
| 22 | #include <boost/config.hpp> |
| 23 | |
| 24 | #if !defined (SIGSTKSZ) |
| 25 | # define SIGSTKSZ (32768) // 32kb minimum allowable stack |
| 26 | # define UDEF_SIGSTKSZ |
| 27 | #endif |
| 28 | |
| 29 | #if !defined (MINSIGSTKSZ) |
| 30 | # define MINSIGSTKSZ (131072) // 128kb recommended stack size |
| 31 | # define UDEF_MINSIGSTKSZ |
| 32 | #endif |
| 33 | |
| 34 | #ifdef BOOST_HAS_ABI_HEADERS |
| 35 | # include BOOST_ABI_PREFIX |
| 36 | #endif |
| 37 | |
| 38 | namespace { |
| 39 | |
| 40 | std::size_t pagesize() BOOST_NOEXCEPT_OR_NOTHROW { |
| 41 | // conform to POSIX.1-2001 |
| 42 | return static_cast<std::size_t>(::sysconf( _SC_PAGESIZE)); |
| 43 | } |
| 44 | |
| 45 | rlim_t stacksize_limit_() BOOST_NOEXCEPT_OR_NOTHROW { |
| 46 | rlimit limit; |
| 47 | // conforming to POSIX.1-2001 |
| 48 | ::getrlimit( RLIMIT_STACK, rlimits: & limit); |
| 49 | return limit.rlim_max; |
| 50 | } |
| 51 | |
| 52 | rlim_t stacksize_limit() BOOST_NOEXCEPT_OR_NOTHROW { |
| 53 | static rlim_t limit = stacksize_limit_(); |
| 54 | return limit; |
| 55 | } |
| 56 | |
| 57 | } |
| 58 | |
| 59 | namespace boost { |
| 60 | namespace context { |
| 61 | |
| 62 | bool |
| 63 | stack_traits::is_unbounded() BOOST_NOEXCEPT_OR_NOTHROW { |
| 64 | return RLIM_INFINITY == stacksize_limit(); |
| 65 | } |
| 66 | |
| 67 | std::size_t |
| 68 | stack_traits::page_size() BOOST_NOEXCEPT_OR_NOTHROW { |
| 69 | static std::size_t size = pagesize(); |
| 70 | return size; |
| 71 | } |
| 72 | |
| 73 | std::size_t |
| 74 | stack_traits::default_size() BOOST_NOEXCEPT_OR_NOTHROW { |
| 75 | return 128 * 1024; |
| 76 | } |
| 77 | |
| 78 | std::size_t |
| 79 | stack_traits::minimum_size() BOOST_NOEXCEPT_OR_NOTHROW { |
| 80 | return static_cast<std::size_t>(MINSIGSTKSZ); |
| 81 | } |
| 82 | |
| 83 | std::size_t |
| 84 | stack_traits::maximum_size() BOOST_NOEXCEPT_OR_NOTHROW { |
| 85 | BOOST_ASSERT( ! is_unbounded() ); |
| 86 | return static_cast< std::size_t >( stacksize_limit() ); |
| 87 | } |
| 88 | |
| 89 | }} |
| 90 | |
| 91 | #ifdef BOOST_HAS_ABI_HEADERS |
| 92 | # include BOOST_ABI_SUFFIX |
| 93 | #endif |
| 94 | |
| 95 | #ifdef UDEF_SIGSTKSZ |
| 96 | # undef SIGSTKSZ |
| 97 | #endif |
| 98 | |
| 99 | #ifdef UDEF_MINSIGSTKSZ |
| 100 | # undef MINSIGSTKSZ |
| 101 | #endif |
| 102 |