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view src/ui/mfw/mfw_tim.h @ 220:0ed36de51973

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ABB semaphore protection overhaul The ABB semaphone protection logic that came with TCS211 from TI was broken in several ways: * Some semaphore-protected functions were called from Application_Initialize() context. NU_Obtain_Semaphore() called with NU_SUSPEND fails with NU_INVALID_SUSPEND in this context, but the return value wasn't checked, and NU_Release_Semaphore() would be called unconditionally at the end. The latter call would increment the semaphore count past 1, making the semaphore no longer binary and thus no longer effective for resource protection. The fix is to check the return value from NU_Obtain_Semaphore() and skip the NU_Release_Semaphore() call if the semaphore wasn't properly obtained. * Some SPI hardware manipulation was being done before entering the semaphore- protected critical section. The fix is to reorder the code: first obtain the semaphore, then do everything else. * In the corner case of L1/DSP recovery, l1_abb_power_on() would call some non-semaphore-protected ABB & SPI init functions. The fix is to skip those calls in the case of recovery. * A few additional corner cases existed, all of which are fixed by making ABB semaphore protection 100% consistent for all ABB functions and code paths. There is still one remaining problem of priority inversion: suppose a low- priority task calls an ABB function, and some medium-priority task just happens to preempt right in the middle of that semaphore-protected ABB operation. Then the high-priority SPI task is locked out for a non-deterministic time until that medium-priority task finishes its work and goes back to sleep. This priority inversion problem remains outstanding for now.
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 26 Apr 2021 20:55:25 +0000
parents 92abb46dc1ba
children
line wrap: on
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/*
+--------------------------------------------------------------------+
| PROJECT: MMI-Framework (8417)         $Workfile:: mfw_tim.h       $|
| $Author:: Es  $ CONDAT GmbH           $Revision:: 8               $|
| CREATED: 21.09.98                     $Modtime:: 2.03.00 11:50    $|
| STATE  : code                                                      |
+--------------------------------------------------------------------+

   MODULE  : MFW_TIM

   PURPOSE : Timer types & constants

   EXPORT  :

   TO DO   :

   $History:: mfw_tim.h                                             $
 *
 * *****************  Version 8  *****************
 * User: Es           Date: 3.03.00    Time: 12:10
 * Updated in $/GSM/Condat/MS/SRC/MFW
 * timStart(), timSignal() etc.: safer handling of simultaneous
 * timeouts; additional chain in timer control block.
 *
 * *****************  Version 7  *****************
 * User: Nm           Date: 18.02.00   Time: 12:34
 * Updated in $/GSM/Condat/MS/SRC/MFW
 * change the name timSetup to
 * timSetTime
 *
 * *****************  Version 6  *****************
 * User: Nm           Date: 18.02.00   Time: 12:21
 * Updated in $/GSM/Condat/MS/SRC/MFW
 * add timSetup()
 *
 * *****************  Version 5  *****************
 * User: Es           Date: 14.06.99   Time: 12:14
 * Updated in $/GSM/DEV/MS/SRC/MFW
 *
 * *****************  Version 4  *****************
 * User: Es           Date: 17.02.99   Time: 19:11
 * Updated in $/GSM/DEV/MS/SRC/MFW
 *
 * *****************  Version 3  *****************
 * User: Es           Date: 14.01.99   Time: 17:19
 * Updated in $/GSM/DEV/MS/SRC/MFW
 *
 * *****************  Version 2  *****************
 * User: Es           Date: 23.12.98   Time: 16:19
 * Updated in $/GSM/DEV/MS/SRC/MFW
*/

#ifndef _DEF_MFW_TIM_H_
#define _DEF_MFW_TIM_H_

typedef struct MfwTimTag                /* TIMER CONTROL BLOCK      */
{
    S32 time;                           /* timeout time             */
    S32 left;                           /* time left before timeout */
    MfwCb handler;                      /* event handler            */
    struct MfwTimTag *next;             /* next in active chain     */
    struct MfwTimTag *next2;            /* next in timeout chain    */
    // PATCH LE 06.06.00
    // add pointer to MFW header element
    MfwHdr * mfwHeader;                /* Associated header.  SPR#1597 - SH - Change mfw_header to mfwHeader */
    // END PATCH LE 06.06.00
} MfwTim;

                                        /* PROTOTYPES               */
MfwRes timInit (void);
MfwRes timExit (void);
MfwHnd timCreate (MfwHnd w, S32 t, MfwCb f);
MfwRes timDelete (MfwHnd h);
MfwRes timStart (MfwHnd tim);
MfwRes timStop (MfwHnd tim);
MfwRes timSetTime (MfwHnd tim, S32 t);
S32 timTime (MfwHnd h);
void timSignal (void);

/* Added to remove warning */
EXTERN UBYTE dspl_Enable (UBYTE   in_Enable);

#endif