workbench/libs/identify/idhardwareupdate.c

   1 /*
   2  * Copyright (c) 2010-2011 Matthias Rustler
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included
  12  * in all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  15  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  17  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  19  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  20  * IN THE SOFTWARE.
  21  *
  22  * $Id$
  23  */
  24
  25 #include <string.h>
  26
  27 #include "identify_intern.h"
  28
  29 /*****************************************************************************
  30
  31     NAME */
  32 #include <proto/identify.h>
  33
  34         AROS_LH0(void, IdHardwareUpdate,
  35
  36 /*  SYNOPSIS */
  37         /* void */
  38
  39 /*  LOCATION */
  40         struct IdentifyBaseIntern *, IdentifyBase, 10, Identify)
  41
  42 /*  FUNCTION
  43         Once a hardware information has been evaluated, the result will be
  44         stored in an internal cache. All subsequent queries return the cache
  45         contents, irregarding of any changes.
  46
  47         This function invalidates the cache and forces identify to re-check
  48         ALL hardware features. Useful if e.g. the amount of memory has changed
  49         after VMM has been started.
  50
  51         Use this function wisely. DO NOT call it just to make sure to get the
  52         latest information, let the user decide to do so. Also, DO NOT call
  53         it when you will only query hardware information that will for sure
  54         not change while run-time, e.g. CPU.
  55
  56         IDHW_VBR, IDHW_LASTALERT and IDHW_TCPIP are NOT cached, so there is
  57         absolutely no need to call IdHardwareUpdate() just to check them out.
  58
  59     INPUTS
  60
  61     RESULT
  62
  63     NOTES
  64
  65     EXAMPLE
  66
  67     BUGS
  68         Calling this function in identify V8.0 will lead to a system crash.
  69         This has been fixed in V8.1.
  70
  71     SEE ALSO
  72         IdHardware(), IdHardwareNum()
  73
  74     INTERNALS
  75
  76     HISTORY
  77
  78
  79 *****************************************************************************/
  80 {
  81     AROS_LIBFUNC_INIT
  82
  83     ObtainSemaphore(&IdentifyBase->sem);
  84
  85     IdentifyBase->dirtyflag = TRUE;
  86     memset(&IdentifyBase->hwb, 0, sizeof IdentifyBase->hwb);
  87
  88     ReleaseSemaphore(&IdentifyBase->sem);
  89
  90     AROS_LIBFUNC_EXIT
  91 } /* IdHardwareUpdate */