-
Notifications
You must be signed in to change notification settings - Fork 5
/
util.c
79 lines (54 loc) · 1.62 KB
/
util.c
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
/****************************** Module Header ******************************\
* Module Name: winutil.c
*
* Copyright (c) 1991, Microsoft Corporation
*
* Implements windows specific utility functions
*
* History:
* 12-09-91 Davidc Created.
\***************************************************************************/
#include "sec.h"
// #include <string.h>
// #include <stdio.h>
/****************************************************************************
FUNCTION: Alloc
PURPOSE: Allocates memory to hold the specified number of bytes
RETURNS : Pointer to allocated memory or NULL on failure
****************************************************************************/
PVOID Alloc(
DWORD Bytes)
{
HANDLE hMem;
PVOID Buffer;
hMem = LocalAlloc(LMEM_MOVEABLE, Bytes + sizeof(hMem));
if (hMem == NULL) {
return(NULL);
}
// Lock down the memory
//
Buffer = LocalLock(hMem);
if (Buffer == NULL) {
LocalFree(hMem);
return(NULL);
}
//
// Store the handle at the start of the memory block and return
// a pointer to just beyond it.
//
*((PHANDLE)Buffer) = hMem;
return (PVOID)(((PHANDLE)Buffer)+1);
}
/****************************************************************************
FUNCTION: Free
PURPOSE: Frees the memory previously allocated with Alloc
RETURNS : TRUE on success, otherwise FALSE
****************************************************************************/
BOOL Free(
PVOID Buffer)
{
HANDLE hMem;
hMem = *(((PHANDLE)Buffer) - 1);
LocalUnlock(hMem);
return(LocalFree(hMem) == NULL);
}