source: trunk/src/win32k/misc/PerTaskW32kData.c@ 6496

Last change on this file since 6496 was 6296, checked in by bird, 24 years ago

Use PTDA not PID and allways take loader sem.
File size: 3.9 KB
Line 
1/* $Id: PerTaskW32kData.c,v 1.2 2001-07-10 16:39:19 bird Exp $
2 *
3 * Per Task (Win32k) Data.
4 *
5 * Copyright (c) 2001 knut st. osmundsen (kosmunds@csc.no)
6 *
7 * Project Odin Software License can be found in LICENSE.TXT
8 *
9 */
10
11
12
13/*******************************************************************************
14* Defined Constants And Macros *
15*******************************************************************************/
16#define INCL_DOSERRORS /* Error codes */
17#define INCL_OS2KRNL_VM /* OS2KRNL: Virtual Memory Management */
18#define INCL_OS2KRNL_TK /* OS2KRNL: Task Stuff */
19#define INCL_OS2KRNL_PTDA
20
21/*******************************************************************************
22* Header Files *
23*******************************************************************************/
24#include <os2.h>
25
26#include "devSegDf.h" /* Win32k segment definitions. */
27#include "dev32.h"
28#include "dev32hlp.h"
29#include "log.h"
30#include "OS2Krnl.h"
31#include <string.h>
32#include "macros.h"
33#include "avl.h"
34#include "PerTaskW32kData.h"
35#include "rmalloc.h"
36
37
38/*******************************************************************************
39* Global Variables *
40*******************************************************************************/
41/*static*/ PAVLNODECORE pPTDTree; /* Pointer to PTD tree */
42 /* Currently assumed protected by ldrSem. */
43
44
45/*******************************************************************************
46* Internal Functions *
47*******************************************************************************/
48PID InternalGetPid(void);
49
50
51/**
52 * Get the task data structure for a given process id.
53 * If it doesn't exist we'll allocate a new one.
54 * @returns Pointer to task data structure.
55 * Might be NULL (see fCreate).
56 * @param pPTDA Pointer to PTDA for the task.
57 * @param fCreate TRUE: Create structure if not found.
58 * FALSE: Return NULL if not found.
59 * @status completely implemented.
60 * @author knut st. osmundsen (kosmunds@csc.no)
61 */
62PPTD GetTaskData(PPTDA pPTDA, BOOL fCreate)
63{
64 PPTD pptd;
65 if (pPTDA == 0)
66 pPTDA = ptdaGetCur();
67 pptd = (PPTD)(void*)AVLGet(&pPTDTree, (AVLKEY)pPTDA);
68 if (!pptd && fCreate)
69 {
70 pptd = rmalloc(sizeof(*pptd));
71 if (!pptd)
72 {
73 kprintf(("GetTaskData: rmalloc failed!\n"));
74 return NULL;
75 }
76 memset(pptd, 0, sizeof(*pptd));
77 pptd->core.Key = (AVLKEY)pPTDA;
78 AVLInsert(&pPTDTree, &pptd->core);
79 }
80 return pptd;
81}
82
83
84/**
85 * Remove the give process id.
86 * @param pPTDA Pointer to PTDA for the task.
87 * @status completely implemented.
88 * @author knut st. osmundsen (kosmunds@csc.no)
89 */
90void RemoveTaskData(PPTDA pPTDA)
91{
92 PPTD pptd;
93 if (pPTDA == 0)
94 pPTDA = ptdaGetCur();
95 pptd = (PPTD)(void*)AVLRemove(&pPTDTree, (AVLKEY)pPTDA);
96 if (pptd)
97 {
98 /* perhaps free data here... */
99 if (*(PULONG)(void*)&pptd->lockOdin32Env)
100 {
101 D32Hlp_VMUnLock(&pptd->lockOdin32Env);
102 memset(&pptd->lockOdin32Env, 0, sizeof(pptd->lockOdin32Env));
103 }
104 pptd->pszzOdin32Env = NULL;
105 rfree(pptd);
106 }
107}
108
109
110/**
111 * Get the current Process Id.
112 * @returns Process id.
113 * -1 on error.
114 * @status completely implemented.
115 * @author knut st. osmundsen (kosmunds@csc.no)
116 * @remark
117 */
118PID InternalGetPid(void)
119{
120 struct InfoSegLDT * pLIS;
121 pLIS = (struct InfoSegLDT*)D32Hlp_GetDOSVar(DHGETDOSV_LOCINFOSEG, 0);
122 if (!pLIS)
123 {
124 kprintf(("InternalGetPid: D32Hlp_GetDOSVar(DHGETDOSV_LOCINFOSEG, 0) failed\n"));
125 return (PID)-1;
126 }
127 return pLIS->LIS_CurProcID;
128}
129
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