| 1 | /* $Id: PerTaskW32kData.c,v 1.1 2001-07-08 03:09:03 bird Exp $
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| 2 | *
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| 3 | * Per Task (Win32k) Data.
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| 4 | *
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| 5 | * Copyright (c) 2001 knut st. osmundsen (kosmunds@csc.no)
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| 6 | *
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| 7 | * Project Odin Software License can be found in LICENSE.TXT
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| 8 | *
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| 9 | */
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| 10 |
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| 11 |
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| 12 |
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| 13 | /*******************************************************************************
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| 14 | * Defined Constants And Macros *
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| 15 | *******************************************************************************/
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| 16 | #define INCL_DOSERRORS /* Error codes */
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| 17 | #define INCL_OS2KRNL_VM /* OS2KRNL: Virtual Memory Management */
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| 18 | #define INCL_OS2KRNL_TK /* OS2KRNL: Task Stuff */
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| 19 |
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| 20 | /*******************************************************************************
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| 21 | * Header Files *
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| 22 | *******************************************************************************/
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| 23 | #include <os2.h>
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| 24 |
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| 25 | #include "devSegDf.h" /* Win32k segment definitions. */
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| 26 | #include "dev32.h"
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| 27 | #include "dev32hlp.h"
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| 28 | #include "log.h"
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| 29 | #include "OS2Krnl.h"
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| 30 | #include <string.h>
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| 31 | #include "macros.h"
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| 32 | #include "avl.h"
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| 33 | #include "PerTaskW32kData.h"
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| 34 | #include "rmalloc.h"
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| 35 |
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| 36 |
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| 37 | /*******************************************************************************
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| 38 | * Global Variables *
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| 39 | *******************************************************************************/
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| 40 | /*static*/ PAVLNODECORE pPTDTree; /* Pointer to PTD tree */
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| 41 | /* Currently assumed protected by ldrSem. */
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| 42 |
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| 43 |
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| 44 | /*******************************************************************************
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| 45 | * Internal Functions *
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| 46 | *******************************************************************************/
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| 47 | PID InternalGetPid(void);
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| 48 |
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| 49 |
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| 50 | /**
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| 51 | * Get the task data structure for a given process id.
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| 52 | * If it doesn't exist we'll allocate a new one.
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| 53 | * @returns Pointer to task data structure.
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| 54 | * @param pid Process id. 0 means current pid.
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| 55 | * @status completely implemented.
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| 56 | * @author knut st. osmundsen (kosmunds@csc.no)
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| 57 | * @remark Do we need a Get function which doesn't make a node if no data was found?
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| 58 | */
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| 59 | PPTD GetTaskData(PID pid)
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| 60 | {
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| 61 | PPTD pptd;
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| 62 | if (pid == 0)
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| 63 | pid = InternalGetPid();
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| 64 | pptd = (PPTD)(void*)AVLGet(&pPTDTree, pid);
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| 65 | if (!pptd)
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| 66 | {
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| 67 | pptd = rmalloc(sizeof(*pptd));
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| 68 | if (!pptd)
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| 69 | {
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| 70 | kprintf(("GetTaskData: rmalloc failed!\n"));
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| 71 | return NULL;
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| 72 | }
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| 73 | memset(pptd, 0, sizeof(*pptd));
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| 74 | pptd->core.Key = pid;
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| 75 | AVLInsert(&pPTDTree, &pptd->core);
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| 76 | }
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| 77 | return pptd;
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| 78 | }
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| 79 |
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| 80 |
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| 81 | /**
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| 82 | * Remove the give process id.
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| 83 | * @param pid Process id to remove. 0 means current pid.
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| 84 | * @status completely implemented.
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| 85 | * @author knut st. osmundsen (kosmunds@csc.no)
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| 86 | */
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| 87 | void RemoveTaskData(PID pid)
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| 88 | {
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| 89 | PPTD pptd;
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| 90 | if (pid == 0)
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| 91 | pid = InternalGetPid();
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| 92 | pptd = (PPTD)(void*)AVLRemove(&pPTDTree, pid);
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| 93 | if (pptd)
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| 94 | {
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| 95 | /* perhaps free data here... */
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| 96 | rfree(pptd);
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| 97 | }
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| 98 | }
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| 99 |
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| 100 |
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| 101 | /**
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| 102 | * Get the current Process Id.
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| 103 | * @returns Process id.
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| 104 | * -1 on error.
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| 105 | * @status completely implemented.
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| 106 | * @author knut st. osmundsen (kosmunds@csc.no)
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| 107 | * @remark
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| 108 | */
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| 109 | PID InternalGetPid(void)
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| 110 | {
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| 111 | struct InfoSegLDT * pLIS;
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| 112 | pLIS = (struct InfoSegLDT*)D32Hlp_GetDOSVar(DHGETDOSV_LOCINFOSEG, 0);
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| 113 | if (!pLIS)
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| 114 | {
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| 115 | kprintf(("InternalGetPid: D32Hlp_GetDOSVar(DHGETDOSV_LOCINFOSEG, 0) failed\n"));
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| 116 | return (PID)-1;
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| 117 | }
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| 118 | return pLIS->LIS_CurProcID;
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| 119 | }
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| 120 |
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