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1 | ||
2 | // Copyright Oliver Kowalke 2013. | |
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 | // based on tss.hpp from boost.thread | |
8 | ||
9 | #ifndef BOOST_FIBERS_FSS_H | |
10 | #define BOOST_FIBERS_FSS_H | |
11 | ||
12 | #include <boost/config.hpp> | |
13 | ||
14 | #include <boost/fiber/context.hpp> | |
15 | #include <boost/fiber/detail/fss.hpp> | |
16 | ||
17 | #ifdef BOOST_HAS_ABI_HEADERS | |
18 | # include BOOST_ABI_PREFIX | |
19 | #endif | |
20 | ||
21 | namespace boost { | |
22 | namespace fibers { | |
23 | ||
24 | template< typename T > | |
25 | class fiber_specific_ptr { | |
26 | private: | |
27 | struct default_cleanup_function : public detail::fss_cleanup_function { | |
28 | void operator()( void * data) noexcept { | |
29 | delete static_cast< T * >( data); | |
30 | } | |
31 | }; | |
32 | ||
33 | struct custom_cleanup_function : public detail::fss_cleanup_function { | |
34 | void (*fn)(T*); | |
35 | ||
36 | explicit custom_cleanup_function( void(*fn_)(T*) ) noexcept : | |
37 | fn{ fn_ } { | |
38 | } | |
39 | ||
40 | void operator()( void* data) { | |
41 | if ( fn) { | |
42 | fn( static_cast< T * >( data) ); | |
43 | } | |
44 | } | |
45 | }; | |
46 | ||
47 | detail::fss_cleanup_function::ptr_t cleanup_fn_; | |
48 | ||
49 | public: | |
50 | typedef T element_type; | |
51 | ||
52 | fiber_specific_ptr() : | |
53 | cleanup_fn_{ new default_cleanup_function() } { | |
54 | } | |
55 | ||
56 | explicit fiber_specific_ptr( void(*fn)(T*) ) : | |
57 | cleanup_fn_{ new custom_cleanup_function( fn) } { | |
58 | } | |
59 | ||
60 | ~fiber_specific_ptr() { | |
61 | context * f = context::active(); | |
62 | if ( nullptr != f) { | |
63 | f->set_fss_data( | |
64 | this, cleanup_fn_, nullptr, true); | |
65 | } | |
66 | } | |
67 | ||
68 | fiber_specific_ptr( fiber_specific_ptr const&) = delete; | |
69 | fiber_specific_ptr & operator=( fiber_specific_ptr const&) = delete; | |
70 | ||
71 | T * get() const noexcept { | |
72 | BOOST_ASSERT( context::active() ); | |
73 | void * vp = context::active()->get_fss_data( this); | |
74 | return static_cast< T * >( vp); | |
75 | } | |
76 | ||
77 | T * operator->() const noexcept { | |
78 | return get(); | |
79 | } | |
80 | ||
81 | T & operator*() const noexcept { | |
82 | return * get(); | |
83 | } | |
84 | ||
85 | T * release() { | |
86 | T * tmp = get(); | |
87 | context::active()->set_fss_data( | |
88 | this, cleanup_fn_, nullptr, false); | |
89 | return tmp; | |
90 | } | |
91 | ||
92 | void reset( T * t) { | |
93 | T * c = get(); | |
94 | if ( c != t) { | |
95 | context::active()->set_fss_data( | |
96 | this, cleanup_fn_, t, true); | |
97 | } | |
98 | } | |
99 | }; | |
100 | ||
101 | }} | |
102 | ||
103 | #ifdef BOOST_HAS_ABI_HEADERS | |
104 | # include BOOST_ABI_SUFFIX | |
105 | #endif | |
106 | ||
107 | #endif // BOOST_FIBERS_FSS_H |