blob: 04a6a354a694ba587dadcb5f947fb26e1676dc33 (
plain) (
blame)
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
|
// license:BSD-3-Clause
// copyright-holders:Couriersud
#ifndef PDYNLIB_H_
#define PDYNLIB_H_
///
/// \file pdynlib.h
///
#include "pstring.h"
#include "ptypes.h"
namespace plib {
// ----------------------------------------------------------------------------------------
// pdynlib: dynamic loading of libraries ...
// ----------------------------------------------------------------------------------------
class dynlib_base
{
public:
explicit dynlib_base() : m_is_loaded(false) { }
virtual ~dynlib_base() = default;
PCOPYASSIGN(dynlib_base, delete)
PMOVEASSIGN(dynlib_base, default)
bool isLoaded() const { return m_is_loaded; }
template <typename T>
T getsym(const pstring &name) const noexcept
{
// NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast)
return reinterpret_cast<T>(getsym_p(name));
}
protected:
void set_loaded(bool v) noexcept { m_is_loaded = v; }
virtual void *getsym_p(const pstring &name) const noexcept = 0;
private:
bool m_is_loaded;
};
class dynlib : public dynlib_base
{
public:
explicit dynlib(const pstring &libname);
dynlib(const pstring &path, const pstring &libname);
~dynlib() override;
PCOPYASSIGN(dynlib, delete)
PMOVEASSIGN(dynlib, default)
protected:
void *getsym_p(const pstring &name) const noexcept override;
private:
void *m_lib;
};
struct dynlib_static_sym
{
const char *name;
void *addr;
};
class dynlib_static : public dynlib_base
{
public:
explicit dynlib_static(const dynlib_static_sym *syms)
: m_syms(syms)
{
if (syms != nullptr)
set_loaded(true);
}
protected:
void *getsym_p(const pstring &name) const noexcept override
{
const dynlib_static_sym *p = m_syms;
while (p->name[0] != 0)
{
if (name == pstring(p->name))
return p->addr;
p++;
}
return nullptr;
}
private:
const dynlib_static_sym *m_syms;
};
template <typename R, typename... Args>
class dynproc
{
public:
using calltype = R(*) (Args... args);
dynproc() : m_sym(nullptr) { }
dynproc(dynlib_base &dl, const pstring &name) noexcept
: m_sym(dl.getsym<calltype>(name))
{
}
void load(dynlib_base &dl, const pstring &name) noexcept
{
m_sym = dl.getsym<calltype>(name);
}
R operator ()(Args&&... args) const
{
return m_sym(std::forward<Args>(args)...);
//return m_sym(args...);
}
bool resolved() const noexcept { return m_sym != nullptr; }
private:
calltype m_sym;
};
} // namespace plib
#endif // PDYNLIB_H_
|