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
|
/**************** Block H Declares Source Code File (.H) ***************/
/* Name: BLOCK.H Version 2.1 */
/* */
/* (C) Copyright to the author Olivier BERTRAND 1998 - 2020 */
/* */
/* This file contains the BLOCK pure virtual class definition. */
/*---------------------------------------------------------------------*/
/* Note: one of the main purpose of this base class is to take care */
/* of the very specific way Connect handles memory allocation. */
/* Instead of allocating small chunks of storage via new or malloc */
/* Connect works in its private memory pool in which it does the sub- */
/* allocation using the function PlugSubAlloc. These are never freed */
/* separately but when a transaction is terminated, the entire pool */
/* is set to empty, resulting in a very fast and efficient allocate */
/* process, no garbage collection problem, and an automatic recovery */
/* procedure (via throw) when the memory is exhausted. */
/* For this to work new must be given two parameters, first the */
/* global pointer of the Plug application, and an optional pointer to */
/* the memory pool to use, defaulting to NULL meaning using the Plug */
/* standard default memory pool, example: */
/* tabp = new(g) XTAB("EMPLOYEE"); */
/* allocates a XTAB class object in the standard Plug memory pool. */
/***********************************************************************/
#if !defined(BLOCK_DEFINED)
#define BLOCK_DEFINED
#if defined(_WIN32) && !defined(NOEX)
#define DllExport __declspec( dllexport )
#else // !_WIN32
#define DllExport
#endif // !_WIN32
/***********************************************************************/
/* Definition of class BLOCK with its method function new. */
/***********************************************************************/
typedef class BLOCK *PBLOCK;
class DllExport BLOCK {
public:
void *operator new(size_t size, PGLOBAL g, void *mp = NULL) {
xtrc(256, "New BLOCK: size=%d g=%p p=%p\n", size, g, mp);
return PlugSubAlloc(g, mp, size);
} // end of new
void* operator new(size_t size, long long mp) {
xtrc(256, "Realloc at: mp=%lld\n", mp);
return (void*)mp;
} // end of new
virtual void Printf(PGLOBAL, FILE *, uint) {} // Produce file desc
virtual void Prints(PGLOBAL, char *, uint) {} // Produce string desc
// Avoid gcc errors by defining matching dummy delete operators
void operator delete(void*, PGLOBAL, void *) {}
void operator delete(void*, long long) {}
void operator delete(void*) {}
virtual ~BLOCK() = default;
}; // end of class BLOCK
#endif // !BLOCK_DEFINED
|
