src/libcaptive/ex/work.c

   1 /* $Id$
   2  * reactos WORK_QUEUE_ITEM handling by libcaptive
   3  * Copyright (C) 2003 Jan Kratochvil <project-captive@jankratochvil.net>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; exactly version 2 of June 1991 is required
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19
  20 #include "config.h"
  21
  22 #include "reactos/ddk/exfuncs.h"        /* self */
  23 #include <glib/gmessages.h>
  24 #include "reactos/ddk/extypes.h"        /* for WORK_QUEUE_ITEM */
  25 #include <glib/gmain.h>
  26
  27
  28 static gboolean ExQueueWorkItem_idlefunc(WORK_QUEUE_ITEM *WorkItem /* data */)
  29 {
  30         g_return_val_if_fail(WorkItem!=NULL,FALSE);     /* false=>remove-me */
  31         g_return_val_if_fail(WorkItem->Routine!=NULL,FALSE);    /* false=>remove-me */
  32
  33         /* typedef VOID STDCALL_FUNC (*PWORKER_THREAD_ROUTINE)(PVOID Parameter); */
  34
  35         (*WorkItem->Routine)(WorkItem->Context);
  36         WorkItem->Routine=NULL; /* request is no longer pending */
  37         return FALSE;   /* remove-me */
  38 }
  39
  40 /**
  41  * ExQueueWorkItem:
  42  * @WorkItem: Initialized structure of #WORK_QUEUE_ITEM to be initialize.
  43  * %NULL value is forbidden.
  44  * @QueueType: Queue priority.
  45  *
  46  * Inserts a work item in a queue for one of the system worker threads to
  47  * process. It will be processed through g_idle_add_full() with priority
  48  * range %G_PRIORITY_DEFAULT+10 ... %G_PRIORITY_DEFAULT+30.
  49  *
  50  * FIXME: @WorkItem is required by libcaptive to remain valid until invocation.
  51  * Is it legal?
  52  */
  53 VOID ExQueueWorkItem(PWORK_QUEUE_ITEM WorkItem,WORK_QUEUE_TYPE QueueType)
  54 {
  55 gint priority;
  56
  57         g_return_if_fail(WorkItem!=NULL);
  58         g_return_if_fail(WorkItem->Routine!=NULL);
  59
  60         switch (QueueType) {
  61                 case DelayedWorkQueue:
  62                         priority=G_PRIORITY_DEFAULT+30; /* positive towards G_PRIORITY_HIGH_IDLE */
  63                         break;
  64                 case CriticalWorkQueue:
  65                         priority=G_PRIORITY_DEFAULT+20; /* positive towards G_PRIORITY_HIGH_IDLE */
  66                         break;
  67                 case HyperCriticalWorkQueue:
  68                         priority=G_PRIORITY_DEFAULT+10; /* positive towards G_PRIORITY_HIGH_IDLE */
  69                         break;
  70                 default:
  71                         g_assert_not_reached();
  72                         priority=G_PRIORITY_DEFAULT;
  73                 }
  74
  75         g_idle_add_full(
  76                         priority,       /* priority */
  77                         (GSourceFunc)ExQueueWorkItem_idlefunc,  /* function */
  78                         WorkItem,       /* data */
  79                         NULL);  /* notify */
  80 }