rom/exec/addmemhandler.c

   1 /*
   2     Copyright © 1995-2011, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: Add a low memory handler.
   6     Lang: english
   7 */
   8
   9 #include <aros/debug.h>
  10 #include <exec/execbase.h>
  11 #include <aros/libcall.h>
  12 #include <proto/exec.h>
  13
  14 #include "exec_intern.h"
  15
  16 /*****************************************************************************
  17
  18     NAME */
  19
  20         AROS_LH1(void, AddMemHandler,
  21
  22 /*  SYNOPSIS */
  23         AROS_LHA(struct Interrupt *, memHandler, A1),
  24
  25 /*  LOCATION */
  26         struct ExecBase *, SysBase, 129, Exec)
  27
  28 /*  FUNCTION
  29         Add some function to be called if the system is low on memory.
  30
  31     INPUTS
  32         memHandler - An Interrupt structure to add to the low memory
  33              handler list.
  34
  35     RESULT
  36
  37     NOTES
  38
  39     EXAMPLE
  40
  41     BUGS
  42
  43     SEE ALSO
  44
  45     INTERNALS
  46
  47 ******************************************************************************/
  48 {
  49     AROS_LIBFUNC_INIT
  50     ASSERT_VALID_PTR(memHandler);
  51
  52     /* Protect the low memory handler list */
  53     ObtainSemaphore(&PrivExecBase(SysBase)->LowMemSem);
  54
  55     /* Nothing spectacular: Just add the new node */
  56     Enqueue((struct List *)&SysBase->ex_MemHandlers,&memHandler->is_Node);
  57
  58     ReleaseSemaphore(&PrivExecBase(SysBase)->LowMemSem);
  59
  60     AROS_LIBFUNC_EXIT
  61 } /* AddMemHandler */
  62