1 //////////////////////////////////////////////////////////////////////////////
2 //
3 // (C) Copyright Ion Gaztanaga 2011-2012. Distributed under the Boost
4 // Software License, Version 1.0. (See accompanying file
5 // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
6 //
7 // See http://www.boost.org/libs/interprocess for documentation.
8 //
9 //////////////////////////////////////////////////////////////////////////////
10
11 #ifndef BOOST_INTERPROCESS_WINDOWS_NAMED_SEMAPHORE_HPP
12 #define BOOST_INTERPROCESS_WINDOWS_NAMED_SEMAPHORE_HPP
13
14 #ifndef BOOST_CONFIG_HPP
15 # include <boost/config.hpp>
16 #endif
17 #
18 #if defined(BOOST_HAS_PRAGMA_ONCE)
19 # pragma once
20 #endif
21
22 #include <boost/interprocess/detail/config_begin.hpp>
23 #include <boost/interprocess/detail/workaround.hpp>
24 #include <boost/interprocess/creation_tags.hpp>
25 #include <boost/interprocess/permissions.hpp>
26 #include <boost/interprocess/detail/interprocess_tester.hpp>
27 #include <boost/interprocess/detail/posix_time_types_wrk.hpp>
28 #include <boost/interprocess/sync/windows/named_sync.hpp>
29 #include <boost/interprocess/sync/windows/winapi_semaphore_wrapper.hpp>
30
31 namespace boost {
32 namespace interprocess {
33 namespace ipcdetail {
34
35
36
37 class windows_named_semaphore
38 {
39 #if !defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED)
40
41 //Non-copyable
42 windows_named_semaphore();
43 windows_named_semaphore(const windows_named_semaphore &);
44 windows_named_semaphore &operator=(const windows_named_semaphore &);
45 #endif //#ifndef BOOST_INTERPROCESS_DOXYGEN_INVOKED
46
47 public:
48 windows_named_semaphore(create_only_t, const char *name, unsigned int initialCount, const permissions &perm = permissions());
49
50 windows_named_semaphore(open_or_create_t, const char *name, unsigned int initialCount, const permissions &perm = permissions());
51
52 windows_named_semaphore(open_only_t, const char *name);
53
54 ~windows_named_semaphore();
55
56 void post();
57 void wait();
58 bool try_wait();
59 bool timed_wait(const boost::posix_time::ptime &abs_time);
60
61 static bool remove(const char *name);
62
63 #if !defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED)
64 private:
65 friend class interprocess_tester;
66 void dont_close_on_destruction();
67 winapi_semaphore_wrapper m_sem_wrapper;
68 windows_named_sync m_named_sync;
69
70 class named_sem_callbacks : public windows_named_sync_interface
71 {
72 public:
73 typedef __int64 sem_count_t;
named_sem_callbacks(winapi_semaphore_wrapper & sem_wrapper,sem_count_t sem_cnt)74 named_sem_callbacks(winapi_semaphore_wrapper &sem_wrapper, sem_count_t sem_cnt)
75 : m_sem_wrapper(sem_wrapper), m_sem_count(sem_cnt)
76 {}
77
get_data_size() const78 virtual std::size_t get_data_size() const
79 { return sizeof(sem_count_t); }
80
buffer_with_final_data_to_file()81 virtual const void *buffer_with_final_data_to_file()
82 { return &m_sem_count; }
83
buffer_with_init_data_to_file()84 virtual const void *buffer_with_init_data_to_file()
85 { return &m_sem_count; }
86
buffer_to_store_init_data_from_file()87 virtual void *buffer_to_store_init_data_from_file()
88 { return &m_sem_count; }
89
open(create_enum_t,const char * id_name)90 virtual bool open(create_enum_t, const char *id_name)
91 {
92 std::string aux_str = "Global\\bipc.sem.";
93 aux_str += id_name;
94 //
95 permissions sem_perm;
96 sem_perm.set_unrestricted();
97 bool created;
98 return m_sem_wrapper.open_or_create
99 ( aux_str.c_str(), static_cast<long>(m_sem_count)
100 , winapi_semaphore_wrapper::MaxCount, sem_perm, created);
101 }
102
close()103 virtual void close()
104 {
105 m_sem_wrapper.close();
106 }
107
~named_sem_callbacks()108 virtual ~named_sem_callbacks()
109 {}
110
111 private:
112 sem_count_t m_sem_count;
113 winapi_semaphore_wrapper& m_sem_wrapper;
114 };
115
116 #endif //#ifndef BOOST_INTERPROCESS_DOXYGEN_INVOKED
117 };
118
~windows_named_semaphore()119 inline windows_named_semaphore::~windows_named_semaphore()
120 {
121 named_sem_callbacks callbacks(m_sem_wrapper, m_sem_wrapper.value());
122 m_named_sync.close(callbacks);
123 }
124
dont_close_on_destruction()125 inline void windows_named_semaphore::dont_close_on_destruction()
126 {}
127
windows_named_semaphore(create_only_t,const char * name,unsigned int initial_count,const permissions & perm)128 inline windows_named_semaphore::windows_named_semaphore
129 (create_only_t, const char *name, unsigned int initial_count, const permissions &perm)
130 : m_sem_wrapper()
131 {
132 named_sem_callbacks callbacks(m_sem_wrapper, initial_count);
133 m_named_sync.open_or_create(DoCreate, name, perm, callbacks);
134 }
135
windows_named_semaphore(open_or_create_t,const char * name,unsigned int initial_count,const permissions & perm)136 inline windows_named_semaphore::windows_named_semaphore
137 (open_or_create_t, const char *name, unsigned int initial_count, const permissions &perm)
138 : m_sem_wrapper()
139 {
140 named_sem_callbacks callbacks(m_sem_wrapper, initial_count);
141 m_named_sync.open_or_create(DoOpenOrCreate, name, perm, callbacks);
142 }
143
windows_named_semaphore(open_only_t,const char * name)144 inline windows_named_semaphore::windows_named_semaphore(open_only_t, const char *name)
145 : m_sem_wrapper()
146 {
147 named_sem_callbacks callbacks(m_sem_wrapper, 0);
148 m_named_sync.open_or_create(DoOpen, name, permissions(), callbacks);
149 }
150
post()151 inline void windows_named_semaphore::post()
152 {
153 m_sem_wrapper.post();
154 }
155
wait()156 inline void windows_named_semaphore::wait()
157 {
158 m_sem_wrapper.wait();
159 }
160
try_wait()161 inline bool windows_named_semaphore::try_wait()
162 {
163 return m_sem_wrapper.try_wait();
164 }
165
timed_wait(const boost::posix_time::ptime & abs_time)166 inline bool windows_named_semaphore::timed_wait(const boost::posix_time::ptime &abs_time)
167 {
168 return m_sem_wrapper.timed_wait(abs_time);
169 }
170
remove(const char * name)171 inline bool windows_named_semaphore::remove(const char *name)
172 {
173 return windows_named_sync::remove(name);
174 }
175
176 } //namespace ipcdetail {
177 } //namespace interprocess {
178 } //namespace boost {
179
180 #include <boost/interprocess/detail/config_end.hpp>
181
182 #endif //BOOST_INTERPROCESS_WINDOWS_NAMED_SEMAPHORE_HPP
183