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
|
// Copyright (C) 2010, Gabriel Dos Reis.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// - Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// - Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in
// the documentation and/or other materials provided with the
// distribution.
//
// - Neither the name of The Numerical Algorithms Group Ltd. nor the
// names of its contributors may be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
// OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <stddef.h>
#include <string>
namespace OpenAxiom {
// -----------------
// -- SystemError --
// -----------------
// Objects of (type derived from) this type are used to report
// error orignating from the OpenAxiom core system.
struct SystemError {
explicit SystemError(std::string);
virtual ~SystemError();
// Return the text of the diagnostic message.
virtual const std::string& message() const;
protected:
const std::string text;
};
// Report a file system erro
void filesystem_error(std::string);
namespace Memory {
// Datatype for pointers to data.
typedef void* Pointer;
// Precision of the host OS storage page unit in byte count
size_t page_size();
// Acquire raw memory from the host OS in multiple
// of storage page nits.
Pointer os_acquire_raw_memory(size_t);
// Release raw storage to the hosting OS. The first operand must
// be a pointer value previous returned by `os_acquire_raw_memory'.
// Otherwise, the result is undefined.
void os_release_raw_memory(Pointer, size_t);
// -----------------
// -- FileMapping --
// -----------------
struct FileMapping {
explicit FileMapping(std::string);
~FileMapping();
const char* begin() const { return static_cast<const char*>(start); }
const char* end() const { return begin() + extent; }
std::size_t size() const { return extent; }
protected:
Pointer start; // address at the mapped storage
size_t extent; // length (in bytes) of the storage
private:
FileMapping(const FileMapping&); // not implemented
FileMapping& operator=(const FileMapping&); // idem
};
}
}
|
