1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
|
// -*- C++ -*-
//
// $Id$
#include "ace/OS_NS_unistd.h"
#include "ace/OS_NS_sys_mman.h"
#include "ace/OS_NS_sys_stat.h"
ACE_BEGIN_VERSIONED_NAMESPACE_DECL
ACE_INLINE ACE_HANDLE
ACE_Mem_Map::handle (void) const
{
ACE_TRACE ("ACE_Mem_Map::handle");
return this->handle_;
}
// Return the name of file that is mapped (if any).
ACE_INLINE const ACE_TCHAR *
ACE_Mem_Map::filename (void) const
{
return this->filename_;
}
ACE_INLINE int
ACE_Mem_Map::map (ACE_HANDLE handle,
size_t length,
int prot,
int share,
void *addr,
ACE_OFF_T offset,
LPSECURITY_ATTRIBUTES sa)
{
ACE_TRACE ("ACE_Mem_Map::map");
return this->map_it (handle, length, prot, share, addr, offset, sa);
}
// Remap the file associated with <this->handle_>.
ACE_INLINE int
ACE_Mem_Map::map (size_t length,
int prot,
int share,
void *addr,
ACE_OFF_T offset,
LPSECURITY_ATTRIBUTES sa)
{
ACE_TRACE ("ACE_Mem_Map::map");
// If we're already mapped at a particular location then try to
// remap the file using the same base address.
if (addr == 0 && this->base_addr_ != 0 && this->base_addr_ != MAP_FAILED)
{
share |= MAP_FIXED;
addr = this->base_addr_;
}
return this->map_it (this->handle (), length, prot,
share, addr, offset, sa);
}
// This operator passes back the starting address of the mapped file.
ACE_INLINE int
ACE_Mem_Map::operator () (void *&addr)
{
ACE_TRACE ("ACE_Mem_Map::operator");
if (this->base_addr_ == MAP_FAILED)
return -1;
else
{
addr = this->base_addr_;
return 0;
}
}
// Return the base address.
ACE_INLINE void *
ACE_Mem_Map::addr (void) const
{
ACE_TRACE ("ACE_Mem_Map::addr");
return this->base_addr_;
}
// This function returns the number of bytes currently mapped in the
// file.
ACE_INLINE size_t
ACE_Mem_Map::size (void) const
{
ACE_TRACE ("ACE_Mem_Map::size");
return this->length_;
}
ACE_INLINE int
ACE_Mem_Map::close_filemapping_handle (void)
{
int result = 0;
if (this->file_mapping_ != this->handle_
&& this->file_mapping_ != ACE_INVALID_HANDLE)
{
result = ACE_OS::close (this->file_mapping_);
this->file_mapping_ = ACE_INVALID_HANDLE;
}
return result;
}
// Unmap the region starting at <this->base_addr_>.
ACE_INLINE int
ACE_Mem_Map::unmap (ssize_t len)
{
ACE_TRACE ("ACE_Mem_Map::unmap");
this->close_filemapping_handle ();
if (this->base_addr_ != MAP_FAILED)
{
int const result = ACE_OS::munmap (this->base_addr_,
len < 0 ? this->length_ : len);
this->base_addr_ = MAP_FAILED;
return result;
}
else
return 0;
}
// Unmap the region starting at <addr_>.
ACE_INLINE int
ACE_Mem_Map::unmap (void *addr, ssize_t len)
{
ACE_TRACE ("ACE_Mem_Map::unmap");
this->close_filemapping_handle ();
return ACE_OS::munmap (addr,
len < 0 ? this->length_ : len);
}
// Sync <len> bytes of the memory region to the backing store starting
// at <this->base_addr_>.
ACE_INLINE int
ACE_Mem_Map::sync (size_t len, int flags)
{
ACE_TRACE ("ACE_Mem_Map::sync");
return ACE_OS::msync (this->base_addr_,
len,
flags);
}
// Sync the whole mapped region.
ACE_INLINE int
ACE_Mem_Map::sync (int flags)
{
ACE_TRACE ("ACE_Mem_Map::sync");
return ACE_OS::msync (this->base_addr_,
this->length_,
flags);
}
// Sync <len> bytes of the memory region to the backing store starting
// at <addr_>.
ACE_INLINE int
ACE_Mem_Map::sync (void *addr, size_t len, int flags)
{
ACE_TRACE ("ACE_Mem_Map::sync");
return ACE_OS::msync (addr, len, flags);
}
// Change the protection of the pages of the mapped region to <prot>
// starting at <this->base_addr_> up to <len> bytes.
ACE_INLINE int
ACE_Mem_Map::protect (size_t len, int prot)
{
ACE_TRACE ("ACE_Mem_Map::protect");
return ACE_OS::mprotect (this->base_addr_, len, prot);
}
// Change the protection of all the pages of the mapped region to <prot>
// starting at <this->base_addr_>.
ACE_INLINE int
ACE_Mem_Map::protect (int prot)
{
ACE_TRACE ("ACE_Mem_Map::protect");
return ACE_OS::mprotect (this->base_addr_, this->length_, prot);
}
// Change the protection of the pages of the mapped region to <prot>
// starting at <addr> up to <len> bytes.
ACE_INLINE int
ACE_Mem_Map::protect (void *addr, size_t len, int prot)
{
ACE_TRACE ("ACE_Mem_Map::protect");
return ACE_OS::mprotect (addr, len, prot);
}
// Hook into the underlying VM system.
ACE_INLINE int
ACE_Mem_Map::advise (int behavior, int len)
{
ACE_TRACE ("ACE_Mem_Map::advise");
const size_t advise_len =
len < 0 ? this->length_ : static_cast<size_t> (len);
return ACE_OS::madvise ((caddr_t) this->base_addr_,
advise_len,
behavior);
}
ACE_INLINE int
ACE_Mem_Map::close_handle (void)
{
int result = 0;
if (this->close_handle_)
{
this->close_handle_ = false;
result = ACE_OS::close (this->handle_);
this->handle_ = ACE_INVALID_HANDLE;
}
return result;
}
ACE_END_VERSIONED_NAMESPACE_DECL
|
