evn_core.c
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C
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<HTML><HEAD><TITLE>/home/asysweb/public_html/cortex/kernel/src/evn_core.c</TITLE></HEAD><BODY><pre><font color="#6920ac">/*************************************************************************/</font><font color="#6920ac">/* */</font><font color="#6920ac">/* Copyright (c) 1997-1999 Australian Real Time Embedded Systems */</font><font color="#6920ac">/* */</font><font color="#6920ac">/* PROPRIETARY RIGHTS of Australian Real Time Embedded Systems */</font><font color="#6920ac">/* are involved in the subject matter of this material. All reproduction,*/</font><font color="#6920ac">/* manufacturing, use, and sales rights pertaining to this subject matter*/</font><font color="#6920ac">/* are governed by the license agreement. The recipient of this software */</font><font color="#6920ac">/* implicitly accepts the terms of the license. */</font><font color="#6920ac">/* */</font><font color="#6920ac">/*************************************************************************/</font><font color="#6920ac">/************************************************************************** * * FILE NAME * * evn_core.c * * SYSTEM COMPONENT * * Event Flags Component * * DESCRIPTION * * This file contains the core services for Event Flags * Component. * * SERVICES * * evnt_Create create/initialise event flags * evnt_Delete destroy event flags * evnt_Set set event flags * evnt_Clr clear event flags * evnt_Wait wait for events * evnt_Try poll events * * SCCS HISTORY * * @(#)evn_core.c 1.4, 01/25/99, 00:32:20 * * AUTHOR * * Vadim N. Azarovsky * * CREATED * * 13-Jun-1998 by Vadim N. Azarovsky * * REVISION HISTORY * * NAME DATE REMARKS * **************************************************************************/</font><b><font color='DarkGreen'>#include</font></b> <a href="ass_defs.h.FIND-INC"><font color="blue">"ass_defs.h"</font></a><b><font color='DarkGreen'>#include</font></b> <a href="swi_defs.h.FIND-INC"><font color="blue">"swi_defs.h"</font></a><b><font color='DarkGreen'>#include</font></b> <a href="hwi_defs.h.FIND-INC"><font color="blue">"hwi_defs.h"</font></a><b><font color='DarkGreen'>#include</font></b> <a href="thr_priv.h.FIND-INC"><font color="blue">"thr_priv.h"</font></a><b><font color='DarkGreen'>#include</font></b> <a href="evn_priv.h.FIND-INC"><font color="blue">"evn_priv.h"</font></a><font color="#6920ac">/* create/initialise events */</font><font size="+1"><i>evnt_Events_t</i> *<b><font color="azure1"><a name="evnt_Create">evnt_Create</a></font></b>( <i>evnt_Events_t</i> *pEvents_a, <i>evnt_Mask_t</i> InitMask_a, <i>evnt_Attr_t</i> *pAttr_a){</font><font color="#6920ac">/********************* * LOCAL VARIABLES * *********************/</font> <font color="#6920ac">/* None */</font><font color="#6920ac">/********************* * PROCEDURE LOGIC * *********************/</font> <b>if</b> (pAttr_a == <a href="CRTX_NULL.FIND-DEF">CRTX_NULL</a>) pAttr_a = &evnt_AttrDefault_g; <b>if</b> (pEvents_a == <a href="CRTX_NULL.FIND-DEF">CRTX_NULL</a>) { pEvents_a = (<i>evnt_Events_t</i>*)<a href="dmem_Alloc.FIND-FUNC">dmem_Alloc</a>(pAttr_a->Segment, <i>sizeof</i>(<i>evnt_Events_t</i>), <i>sizeof</i>(<i>crtx_Unsigned_t</i>)); <b>if</b> ((<i>crtx_Void_t</i>*)pEvents_a == (<i>crtx_Void_t</i>*)<a href="DMEM_ILLEGAL.FIND-DEF">DMEM_ILLEGAL</a>) { <font color="#6920ac">/* memory allocation error */</font> <a href="CRTX_EXCEPTION.FIND-DEF">CRTX_EXCEPTION</a> MemAllocError_Exc; } pEvents_a->ObjFlags = <a href="EVNT_FLAG_INIT.FIND-DEF">EVNT_FLAG_INIT</a> | <a href="EVNT_FLAG_EVENTS_ALLOC.FIND-DEF">EVNT_FLAG_EVENTS_ALLOC</a>; } <b>else</b> { pEvents_a->ObjFlags = <a href="EVNT_FLAG_INIT.FIND-DEF">EVNT_FLAG_INIT</a>; } <font color="#6920ac">/* initialise events */</font> <a href="EVNT_SET_SUSP_POLICY.FIND-DEF">EVNT_SET_SUSP_POLICY</a>(pEvents_a, pAttr_a); pEvents_a->Flags = InitMask_a; pEvents_a->Segment = pAttr_a->Segment; <a href="RQUE_INIT_QUEUE.FIND-DEF">RQUE_INIT_QUEUE</a>(&pEvents_a->WaitingList); <b><font color='DarkGreen'>#if</font></b><font color="maroon"> ENVI_CRTX_ERR_CHECK_LEVEL > 0</font> <a href="EVNT_SET_EVENTS_ID.FIND-DEF">EVNT_SET_EVENTS_ID</a>(pEvents_a);<b><font color='DarkGreen'>#endif</font></b><font color="maroon"> <font color="#6920ac">/* ENVI_CRTX_ERR_CHECK_LEVEL > 0 */</font></font> <b>return</b> pEvents_a;<font color="#6920ac">/************************ * EXCEPTION HANDLING * ************************/</font><font color="blue">MemAllocError_Exc:</font> <font color="#6920ac">/* memory allocation error */</font> <b>return</b> <a href="CRTX_NULL.FIND-DEF">CRTX_NULL</a>;}<font color="#6920ac">/* destroy events */</font><font size="+1"><i>crtx_Void_t</i> <b><font color="azure1"><a name="evnt_Delete">evnt_Delete</a></font></b>( <i>evnt_Events_t</i> *pEvents_a){</font><font color="#6920ac">/********************* * LOCAL VARIABLES * *********************/</font> <font color="#6920ac">/* None */</font><font color="#6920ac">/********************* * PROCEDURE LOGIC * *********************/</font> <a href="CRTX_ASSERT.FIND-DEF">CRTX_ASSERT</a>(pEvents_a)<b><font color='DarkGreen'>#if</font></b><font color="maroon"> ENVI_CRTX_ERR_CHECK_LEVEL > 0</font> <a href="CRTX_ASSERT.FIND-DEF">CRTX_ASSERT</a>(<a href="EVNT_CHECK_EVENTS_ID.FIND-DEF">EVNT_CHECK_EVENTS_ID</a>(pEvents_a))<b><font color='DarkGreen'>#endif</font></b><font color="maroon"> <font color="#6920ac">/* ENVI_CRTX_ERR_CHECK_LEVEL > 0 */</font></font> <b>if</b> (pEvents_a->ObjFlags & <a href="EVNT_FLAG_EVENTS_ALLOC.FIND-DEF">EVNT_FLAG_EVENTS_ALLOC</a>) { <font color="#6920ac">/* release internaly allocated control block */</font> <a href="dmem_Free.FIND-FUNC">dmem_Free</a>(pEvents_a->Segment, (<i>crtx_Void_t</i>*)pEvents_a, <i>sizeof</i>(<i>evnt_Events_t</i>)); } <b>else</b> { pEvents_a->ObjFlags = <a href="EVNT_FLAG_INIT.FIND-DEF">EVNT_FLAG_INIT</a>;<b><font color='DarkGreen'>#if</font></b><font color="maroon"> ENVI_CRTX_ERR_CHECK_LEVEL > 0</font> <a href="CRTX_SET_NO_ID.FIND-DEF">CRTX_SET_NO_ID</a>(pEvents_a); <font color="#6920ac">/* no id */</font><b><font color='DarkGreen'>#endif</font></b><font color="maroon"> <font color="#6920ac">/* ENVI_CRTX_ERR_CHECK_LEVEL > 0 */</font></font> } <b>return</b>;<font color="#6920ac">/************************ * EXCEPTION HANDLING * ************************/</font> <font color="#6920ac">/* None */</font>}<font color="#6920ac">/* Set event flags */</font><font size="+1"><i>evnt_Mask_t</i> <b><font color="azure1"><a name="evnt_Set">evnt_Set</a></font></b>( <i>evnt_Events_t</i> *pEvents_a, <i>evnt_Mask_t</i> SetMask_a){</font><font color="#6920ac">/********************* * LOCAL VARIABLES * *********************/</font> <a href="CRTX_REG_1.FIND-DEF">CRTX_REG_1</a> <i>evnt_Mask_t</i> OldMask; <a href="CRTX_REG_2.FIND-DEF">CRTX_REG_2</a> <i>evnt_SuspendBlock_t</i> *pSuspendBlock; <a href="CRTX_REG_3.FIND-DEF">CRTX_REG_3</a> <i>evnt_Mask_t</i> RcvdMask; <a href="CRTX_REG_4.FIND-DEF">CRTX_REG_4</a> <i>rque_Node_t</i> *pNode; <i>hrdi_GlobalIntrCookie_t</i> GlobalIntrCookie; <i>rque_Cursor_t</i> Cursor;<font color="#6920ac">/********************* * PROCEDURE LOGIC * *********************/</font> <a href="CRTX_ASSERT.FIND-DEF">CRTX_ASSERT</a>(pEvents_a)<b><font color='DarkGreen'>#if</font></b><font color="maroon"> ENVI_CRTX_ERR_CHECK_LEVEL > 0</font> <a href="CRTX_ASSERT.FIND-DEF">CRTX_ASSERT</a>(<a href="EVNT_CHECK_EVENTS_ID.FIND-DEF">EVNT_CHECK_EVENTS_ID</a>(pEvents_a))<b><font color='DarkGreen'>#endif</font></b><font color="maroon"> <font color="#6920ac">/* ENVI_CRTX_ERR_CHECK_LEVEL > 0 */</font></font> GlobalIntrCookie = <a href="hrdi_GlobalIntrDisable.FIND-FUNC">hrdi_GlobalIntrDisable</a>(); OldMask = pEvents_a->Flags; pEvents_a->Flags |= SetMask_a; <a href="hrdi_GlobalIntrEnable.FIND-FUNC">hrdi_GlobalIntrEnable</a>(GlobalIntrCookie); <b>if</b> ((SetMask_a & ~OldMask) && (!<a href="RQUE_IS_EMPTY.FIND-DEF">RQUE_IS_EMPTY</a>(&pEvents_a->WaitingList))) { <font color="#6920ac">/* there are thread waiting for events */</font> <a href="thrd_Protect.FIND-FUNC">thrd_Protect</a>(); <a href="rque_CursorInit.FIND-FUNC">rque_CursorInit</a>(&pEvents_a->WaitingList, &Cursor); <b>while</b> ((pNode = <a href="rque_CursorNext.FIND-FUNC">rque_CursorNext</a>(&Cursor)) != <a href="CRTX_NULL.FIND-DEF">CRTX_NULL</a>) { pSuspendBlock = (<i>evnt_SuspendBlock_t</i>*)<a href="RQUE_GET_NODE_ARG.FIND-DEF">RQUE_GET_NODE_ARG</a>(pNode); <a href="CRTX_ASSERT.FIND-DEF">CRTX_ASSERT</a>(pSuspendBlock)<b><font color='DarkGreen'>#if</font></b><font color="maroon"> ENVI_CRTX_ERR_CHECK_LEVEL>0</font> <a href="CRTX_ASSERT.FIND-DEF">CRTX_ASSERT</a>(<a href="EVNT_CHECK_SUSPEND_BLOCK_ID.FIND-DEF">EVNT_CHECK_SUSPEND_BLOCK_ID</a>(pSuspendBlock)) <a href="CRTX_ASSERT.FIND-DEF">CRTX_ASSERT</a>(<a href="EVNT_CHECK_EVENTS_REF.FIND-DEF">EVNT_CHECK_EVENTS_REF</a>(pSuspendBlock,pEvents_a))<b><font color='DarkGreen'>#endif</font></b><font color="maroon"> <font color="#6920ac">/* ENVI_CRTX_ERR_CHECK_LEVEL>0 */</font></font> RcvdMask = pEvents_a->Flags & pSuspendBlock->EventMask;⌨️ 快捷键说明
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