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comparison gcc/ada/libgnat/s-mmosin__mingw.ads @ 111:04ced10e8804

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gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
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children 84e7813d76e9
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68:561a7518be6b 111:04ced10e8804
1 ------------------------------------------------------------------------------
2 -- --
3 -- GNAT RUN-TIME COMPONENTS --
4 -- --
5 -- S Y S T E M . M M A P . O S _ I N T E R F A C E --
6 -- --
7 -- S p e c --
8 -- --
9 -- Copyright (C) 2007-2017, AdaCore --
10 -- --
11 -- This library is free software; you can redistribute it and/or modify it --
12 -- under terms of the GNU General Public License as published by the Free --
13 -- Software Foundation; either version 3, or (at your option) any later --
14 -- version. This library is distributed in the hope that it will be useful, --
15 -- but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHAN- --
16 -- TABILITY or FITNESS FOR A PARTICULAR PURPOSE. --
17 -- --
18 -- As a special exception under Section 7 of GPL version 3, you are granted --
19 -- additional permissions described in the GCC Runtime Library Exception, --
20 -- version 3.1, as published by the Free Software Foundation. --
21 -- --
22 -- You should have received a copy of the GNU General Public License and --
23 -- a copy of the GCC Runtime Library Exception along with this program; --
24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
25 -- <http://www.gnu.org/licenses/>. --
26 -- --
27 -- GNAT was originally developed by the GNAT team at New York University. --
28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
29 -- --
30 ------------------------------------------------------------------------------
31
32 -- OS pecularities abstraction package for Win32 systems.
33
34 package System.Mmap.OS_Interface is
35
36 -- The Win package contains copy of definition found in recent System.Win32
37 -- unit provided with the GNAT compiler. The copy is needed to be able to
38 -- compile this unit with older compilers. Note that this internal Win
39 -- package can be removed when GNAT 6.1.0 is not supported anymore.
40
41 package Win is
42
43 subtype PVOID is Standard.System.Address;
44
45 type HANDLE is new Interfaces.C.ptrdiff_t;
46
47 type WORD is new Interfaces.C.unsigned_short;
48 type DWORD is new Interfaces.C.unsigned_long;
49 type LONG is new Interfaces.C.long;
50 type SIZE_T is new Interfaces.C.size_t;
51
52 type BOOL is new Interfaces.C.int;
53 for BOOL'Size use Interfaces.C.int'Size;
54
55 FALSE : constant := 0;
56
57 GENERIC_READ : constant := 16#80000000#;
58 GENERIC_WRITE : constant := 16#40000000#;
59 OPEN_EXISTING : constant := 3;
60
61 type OVERLAPPED is record
62 Internal : DWORD;
63 InternalHigh : DWORD;
64 Offset : DWORD;
65 OffsetHigh : DWORD;
66 hEvent : HANDLE;
67 end record;
68
69 type SECURITY_ATTRIBUTES is record
70 nLength : DWORD;
71 pSecurityDescriptor : PVOID;
72 bInheritHandle : BOOL;
73 end record;
74
75 type SYSTEM_INFO is record
76 dwOemId : DWORD;
77 dwPageSize : DWORD;
78 lpMinimumApplicationAddress : PVOID;
79 lpMaximumApplicationAddress : PVOID;
80 dwActiveProcessorMask : PVOID;
81 dwNumberOfProcessors : DWORD;
82 dwProcessorType : DWORD;
83 dwAllocationGranularity : DWORD;
84 wProcessorLevel : WORD;
85 wProcessorRevision : WORD;
86 end record;
87 type LP_SYSTEM_INFO is access all SYSTEM_INFO;
88
89 INVALID_HANDLE_VALUE : constant HANDLE := -1;
90 FILE_BEGIN : constant := 0;
91 FILE_SHARE_READ : constant := 16#00000001#;
92 FILE_ATTRIBUTE_NORMAL : constant := 16#00000080#;
93 FILE_MAP_COPY : constant := 1;
94 FILE_MAP_READ : constant := 4;
95 FILE_MAP_WRITE : constant := 2;
96 PAGE_READONLY : constant := 16#0002#;
97 PAGE_READWRITE : constant := 16#0004#;
98 INVALID_FILE_SIZE : constant := 16#FFFFFFFF#;
99
100 function CreateFile
101 (lpFileName : Standard.System.Address;
102 dwDesiredAccess : DWORD;
103 dwShareMode : DWORD;
104 lpSecurityAttributes : access SECURITY_ATTRIBUTES;
105 dwCreationDisposition : DWORD;
106 dwFlagsAndAttributes : DWORD;
107 hTemplateFile : HANDLE) return HANDLE;
108 pragma Import (Stdcall, CreateFile, "CreateFileW");
109
110 function WriteFile
111 (hFile : HANDLE;
112 lpBuffer : Standard.System.Address;
113 nNumberOfBytesToWrite : DWORD;
114 lpNumberOfBytesWritten : access DWORD;
115 lpOverlapped : access OVERLAPPED) return BOOL;
116 pragma Import (Stdcall, WriteFile, "WriteFile");
117
118 function ReadFile
119 (hFile : HANDLE;
120 lpBuffer : Standard.System.Address;
121 nNumberOfBytesToRead : DWORD;
122 lpNumberOfBytesRead : access DWORD;
123 lpOverlapped : access OVERLAPPED) return BOOL;
124 pragma Import (Stdcall, ReadFile, "ReadFile");
125
126 function CloseHandle (hObject : HANDLE) return BOOL;
127 pragma Import (Stdcall, CloseHandle, "CloseHandle");
128
129 function GetFileSize
130 (hFile : HANDLE; lpFileSizeHigh : access DWORD) return DWORD;
131 pragma Import (Stdcall, GetFileSize, "GetFileSize");
132
133 function SetFilePointer
134 (hFile : HANDLE;
135 lDistanceToMove : LONG;
136 lpDistanceToMoveHigh : access LONG;
137 dwMoveMethod : DWORD) return DWORD;
138 pragma Import (Stdcall, SetFilePointer, "SetFilePointer");
139
140 function CreateFileMapping
141 (hFile : HANDLE;
142 lpSecurityAttributes : access SECURITY_ATTRIBUTES;
143 flProtect : DWORD;
144 dwMaximumSizeHigh : DWORD;
145 dwMaximumSizeLow : DWORD;
146 lpName : Standard.System.Address) return HANDLE;
147 pragma Import (Stdcall, CreateFileMapping, "CreateFileMappingW");
148
149 function MapViewOfFile
150 (hFileMappingObject : HANDLE;
151 dwDesiredAccess : DWORD;
152 dwFileOffsetHigh : DWORD;
153 dwFileOffsetLow : DWORD;
154 dwNumberOfBytesToMap : SIZE_T) return Standard.System.Address;
155 pragma Import (Stdcall, MapViewOfFile, "MapViewOfFile");
156
157 function UnmapViewOfFile
158 (lpBaseAddress : Standard.System.Address) return BOOL;
159 pragma Import (Stdcall, UnmapViewOfFile, "UnmapViewOfFile");
160
161 procedure GetSystemInfo (lpSystemInfo : LP_SYSTEM_INFO);
162 pragma Import (Stdcall, GetSystemInfo, "GetSystemInfo");
163
164 end Win;
165
166 type System_File is record
167 Handle : Win.HANDLE;
168
169 Mapped : Boolean;
170 -- Whether mapping is requested by the user and available on the system
171
172 Mapping_Handle : Win.HANDLE;
173
174 Write : Boolean;
175 -- Whether this file can be written to
176
177 Length : File_Size;
178 -- Length of the file. Used to know what can be mapped in the file
179 end record;
180
181 type System_Mapping is record
182 Address : Standard.System.Address;
183 Length : File_Size;
184 end record;
185
186 Invalid_System_File : constant System_File :=
187 (Win.INVALID_HANDLE_VALUE, False, Win.INVALID_HANDLE_VALUE, False, 0);
188 Invalid_System_Mapping : constant System_Mapping :=
189 (Standard.System.Null_Address, 0);
190
191 function Open_Read
192 (Filename : String;
193 Use_Mmap_If_Available : Boolean := True) return System_File;
194 -- Open a file for reading and return the corresponding System_File. Return
195 -- Invalid_System_File if unsuccessful.
196
197 function Open_Write
198 (Filename : String;
199 Use_Mmap_If_Available : Boolean := True) return System_File;
200 -- Likewise for writing to a file
201
202 procedure Close (File : in out System_File);
203 -- Close a system file
204
205 function Read_From_Disk
206 (File : System_File;
207 Offset, Length : File_Size) return System.Strings.String_Access;
208 -- Read a fragment of a file. It is up to the caller to free the result
209 -- when done with it.
210
211 procedure Write_To_Disk
212 (File : System_File;
213 Offset, Length : File_Size;
214 Buffer : System.Strings.String_Access);
215 -- Write some content to a fragment of a file
216
217 procedure Create_Mapping
218 (File : System_File;
219 Offset, Length : in out File_Size;
220 Mutable : Boolean;
221 Mapping : out System_Mapping);
222 -- Create a memory mapping for the given File, for the area starting at
223 -- Offset and containing Length bytes. Store it to Mapping.
224 -- Note that Offset and Length may be modified according to the system
225 -- needs (for boudaries, for instance). The caller must cope with actually
226 -- wider mapped areas.
227
228 procedure Dispose_Mapping
229 (Mapping : in out System_Mapping);
230 -- Unmap a previously-created mapping
231
232 function Get_Page_Size return File_Size;
233 -- Return the number of bytes in a system page.
234
235 end System.Mmap.OS_Interface;