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| 2 | /*
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| 3 | *@@sourcefile apcih.c:
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| 4 | * contains helpers for accessing ACPI.
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| 5 | *
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| 6 | * Usage: All OS/2 programs.
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| 7 | *
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| 8 | * Function prefixes:
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| 9 | * -- acpih* ACPI helper functions
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| 10 | *
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| 11 | * Note: Version numbering in this file relates to XWorkplace version
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| 12 | * numbering.
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| 13 | *
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| 14 | *@@header "helpers\acpih.h"
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| 15 | *@@added V1.0.5 (2006-06-26) [pr]
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| 16 | */
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| 17 |
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| 18 | /*
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| 19 | * Copyright (C) 2006 Paul Ratcliffe.
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| 20 | * This file is part of the "XWorkplace helpers" source package.
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| 21 | * This is free software; you can redistribute it and/or modify
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| 22 | * it under the terms of the GNU General Public License as published
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| 23 | * by the Free Software Foundation, in version 2 as it comes in the
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| 24 | * "COPYING" file of the XWorkplace main distribution.
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| 25 | * This program is distributed in the hope that it will be useful,
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| 26 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 27 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 28 | * GNU General Public License for more details.
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| 29 | */
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| 30 |
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| 31 | #define OS2EMX_PLAIN_CHAR
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| 32 | // this is needed for "os2emx.h"; if this is defined,
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| 33 | // emx will define PSZ as _signed_ char, otherwise
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| 34 | // as unsigned char
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| 35 |
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| 36 | #define INCL_DOSMODULEMGR
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| 37 | #define INCL_DOSERRORS
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| 38 | #include <os2.h>
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| 39 |
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| 40 | #include "setup.h" // code generation and debugging options
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| 41 |
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| 42 | #include "helpers\acpih.h"
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| 43 | #include "helpers\standards.h"
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| 44 |
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| 45 | /* ******************************************************************
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| 46 | *
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| 47 | * Globals
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| 48 | *
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| 49 | ********************************************************************/
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| 50 |
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| 51 | HMODULE hmodACPI = NULLHANDLE;
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| 52 |
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| 53 | ACPISTARTAPI *pAcpiStartApi = NULL;
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| 54 | ACPIENDAPI *pAcpiEndApi = NULL;
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| 55 | ACPIGOTOSLEEP *pAcpiGoToSleep = NULL;
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| 56 |
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| 57 | /*
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| 58 | *@@category: Helpers\Control program helpers\ACPI
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| 59 | * See acpih.c.
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| 60 | */
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| 61 |
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| 62 | /*
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| 63 | *@@ acpihOpen:
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| 64 | * resolves the ACPI entrypoints and loads the ACPI DLL.
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| 65 | */
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| 66 |
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| 67 | APIRET acpihOpen(ACPI_API_HANDLE *phACPI)
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| 68 | {
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| 69 | APIRET arc = NO_ERROR;
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| 70 |
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| 71 | if (!hmodACPI)
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| 72 | if (!(arc = DosLoadModule(NULL,
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| 73 | 0,
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| 74 | "ACPI32",
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| 75 | &hmodACPI)))
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| 76 | {
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| 77 | arc = DosQueryProcAddr(hmodACPI,
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| 78 | ORD_ACPISTARTAPI,
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| 79 | NULL,
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| 80 | (PFN *) &pAcpiStartApi);
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| 81 | if (!arc)
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| 82 | arc = DosQueryProcAddr(hmodACPI,
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| 83 | ORD_ACPIENDAPI,
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| 84 | NULL,
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| 85 | (PFN *) &pAcpiEndApi);
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| 86 |
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| 87 | if (!arc)
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| 88 | arc = DosQueryProcAddr(hmodACPI,
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| 89 | ORD_ACPIGOTOSLEEP,
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| 90 | NULL,
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| 91 | (PFN *) &pAcpiGoToSleep);
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| 92 | if (arc)
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| 93 | {
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| 94 | DosFreeModule(hmodACPI);
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| 95 | hmodACPI = NULLHANDLE;
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| 96 | pAcpiStartApi = NULL;
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| 97 | pAcpiEndApi = NULL;
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| 98 | pAcpiGoToSleep = NULL;
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| 99 | return(arc);
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| 100 | }
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| 101 | }
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| 102 |
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| 103 | if (arc)
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| 104 | return(arc);
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| 105 | else
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| 106 | return(pAcpiStartApi(phACPI));
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| 107 | }
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| 108 |
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| 109 | /*
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| 110 | *@@ acpihClose:
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| 111 | * unloads the ACPI DLL.
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| 112 | */
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| 113 |
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| 114 | VOID acpihClose(ACPI_API_HANDLE *phACPI)
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| 115 | {
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| 116 | if (pAcpiEndApi)
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| 117 | pAcpiEndApi(phACPI);
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| 118 | }
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| 119 |
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| 120 | /*
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| 121 | *@@ acpihGoToSleep:
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| 122 | * changes the Power State.
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| 123 | */
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| 124 |
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| 125 | APIRET acpihGoToSleep(ACPI_API_HANDLE *phACPI, UCHAR ucState)
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| 126 | {
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| 127 | if (pAcpiGoToSleep)
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| 128 | return(pAcpiGoToSleep(phACPI, ucState));
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| 129 | else
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| 130 | return(ERROR_PROTECTION_VIOLATION);
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| 131 | }
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| 132 |
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