source: trunk/src/win32k/misc/OS2KPTDA.c@ 6496

Last change on this file since 6496 was 6231, checked in by bird, 24 years ago

Implemented LIBPATH get functions.
File size: 3.7 KB
Line 
1/* $Id: OS2KPTDA.c,v 1.5 2001-07-08 03:09:51 bird Exp $
2 *
3 * PTDA access functions.
4 *
5 * Copyright (c) 2000 knut st. osmundsen (knut.stange.osmundsen@mynd.no)
6 *
7 * Project Odin Software License can be found in LICENSE.TXT
8 *
9 */
10
11/*******************************************************************************
12* Defined Constants And Macros *
13*******************************************************************************/
14#define INCL_OS2KRNL_SEM
15#define INCL_OS2KRNL_PTDA
16
17/*******************************************************************************
18* Header Files *
19*******************************************************************************/
20#include <os2.h>
21#include <OS2Krnl.h>
22
23
24/*******************************************************************************
25* External Data *
26*******************************************************************************/
27/*
28 * Requires the following imports:
29 * pPTDACur
30 * ptda_start
31 * ptda_environ
32 */
33extern ULONG pptda_start;
34extern ULONG pptda_environ;
35extern ULONG pptda_ptdasem;
36extern ULONG pptda_handle;
37extern ULONG pptda_module;
38extern ULONG pptda_pBeginLIBPATH;
39
40
41/**
42 * Gets the ptda_environ PTDA member. This member holds the memory object handle
43 * for the environment block of the processes.
44 * @returns Content of the pPTDA->ptda_environ member.
45 * @param pPTDA PTDA Pointer. (NULL is not allowed!)
46 */
47USHORT ptdaGet_ptda_environ(PPTDA pPTDA)
48{
49 return *(PUSHORT)(void*)(((char*)(void*)pPTDA) + (pptda_environ - pptda_start));
50}
51
52
53/**
54 * Gets the ptda_handle PTDA member. This member holds the PTDA handle for the
55 * given PTDA.
56 * @returns Content of the pPTDA->ptda_handle member.
57 * @param pPTDA PTDA Pointer. (NULL is not allowed!)
58 */
59HPTDA ptdaGet_ptda_handle(PPTDA pPTDA)
60{
61 return *(PHPTDA)(void*)(((char*)(void*)pPTDA) + (pptda_handle - pptda_start));
62}
63
64
65/**
66 * Gets the ptda_module PTDA member. This member holds the MTE handle of the process's
67 * executable image.
68 * @returns Content of the pPTDA->ptda_module member.
69 * @param pPTDA PTDA Pointer. (NULL is not allowed!)
70 */
71USHORT ptdaGet_ptda_module(PPTDA pPTDA)
72{
73 return *(PUSHORT)(void*)(((char*)(void*)pPTDA) + (pptda_module - pptda_start));
74}
75
76
77/**
78 * Gets the ptda_ptdasem PTDA member. This member holds the intra-process semaphore which
79 * for example is used to serialize _LDRQAppType.
80 * @returns Content of the pPTDA->ptda_ptdasem member.
81 * @param pPTDA PTDA Pointer. (NULL is not allowed!)
82 */
83HKSEMMTX ptda_ptda_ptdasem(PPTDA pPTDA)
84{
85 return (HKSEMMTX)(void*)(((char*)(void*)pPTDA) + (pptda_ptdasem - pptda_start));
86}
87
88
89/**
90 * Gets the ptda_pBeginLIBPATH PTDA member. This member may hold the begin libpath
91 * extention for this process.
92 * @returns beginlibpath string pointer.
93 * NULL if member is NULL or not supported by kernel.
94 * @param pPTDA PTDA Pointer. (NULL is not allowed!)
95 */
96PSZ ptdaGet_ptda_pBeginLIBPATH(PPTDA pPTDA)
97{
98 if (!pptda_pBeginLIBPATH)
99 return NULL;
100 return *(PSZ*)(void*)(((char*)(void*)pPTDA) + (pptda_pBeginLIBPATH - pptda_start));
101}
102
103
104/**
105 * Gets the ptda_pEndLIBPATH PTDA member. This member might hold the end libpath
106 * extention for this process.
107 * @returns endlibpath string pointer.
108 * NULL if member is NULL or not supported by kernel.
109 * @param pPTDA PTDA Pointer. (NULL is not allowed!)
110 */
111PSZ ptdaGet_ptda_pEndLIBPATH(PPTDA pPTDA)
112{
113 if (!pptda_pBeginLIBPATH)
114 return NULL;
115 return *(PSZ*)(void*)(((char*)(void*)pPTDA) + (pptda_pBeginLIBPATH + 4 - pptda_start));
116}
117
118
119
120
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