📄 os_mbox.lst
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345 2 }
346 1 if (pevent->OSEventPtr != (void *)0) { /* Make sure mailbox doesn't already have a msg */
347 2 OS_EXIT_CRITICAL();
348 2 return (OS_MBOX_FULL);
349 2 }
350 1 pevent->OSEventPtr = msg; /* Place message in mailbox */
351 1 OS_EXIT_CRITICAL();
352 1 return (OS_NO_ERR);
353 1 }
354 #endif
355
356 /*$PAGE*/
357 /*
358 *********************************************************************************************************
359 * POST MESSAGE TO A MAILBOX
360 *
361 * Description: This function sends a message to a mailbox
362 *
363 * Arguments : pevent is a pointer to the event control block associated with the desired mailbox
364 *
C51 COMPILER V7.06 OS_MBOX 07/18/2003 11:05:58 PAGE 7
365 * msg is a pointer to the message to send. You MUST NOT send a NULL pointer.
366 *
367 * opt determines the type of POST performed:
368 * OS_POST_OPT_NONE POST to a single waiting task
369 * (Identical to OSMboxPost())
370 * OS_POST_OPT_BROADCAST POST to ALL tasks that are waiting on the mailbox
371 *
372 * Returns : OS_NO_ERR The call was successful and the message was sent
373 * OS_MBOX_FULL If the mailbox already contains a message. You can can only send one
374 * message at a time and thus, the message MUST be consumed before you
375 * are allowed to send another one.
376 * OS_ERR_EVENT_TYPE If you are attempting to post to a non mailbox.
377 * OS_ERR_PEVENT_NULL If 'pevent' is a NULL pointer
378 * OS_ERR_POST_NULL_PTR If you are attempting to post a NULL pointer
379 *
380 * Warning : Interrupts can be disabled for a long time if you do a 'broadcast'. In fact, the
381 * interrupt disable time is proportional to the number of tasks waiting on the mailbox.
382 *********************************************************************************************************
383 */
384
385 #if OS_MBOX_POST_OPT_EN > 0
386 INT8U OSMboxPostOpt (OS_EVENT *pevent, void *msg, INT8U opt) reentrant //using 0
387 {
388 1 #if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
389 1 OS_CPU_SR cpu_sr;
390 1 #endif
391 1
392 1
393 1 #if OS_ARG_CHK_EN > 0
394 1 if (pevent == (OS_EVENT *)0) { /* Validate 'pevent' */
395 2 return (OS_ERR_PEVENT_NULL);
396 2 }
397 1 if (msg == (void *)0) { /* Make sure we are not posting a NULL pointer */
398 2 return (OS_ERR_POST_NULL_PTR);
399 2 }
400 1 #endif
401 1 if (pevent->OSEventType != OS_EVENT_TYPE_MBOX) { /* Validate event block type */
402 2 return (OS_ERR_EVENT_TYPE);
403 2 }
404 1 OS_ENTER_CRITICAL();
405 1 if (pevent->OSEventGrp != 0x00) { /* See if any task pending on mailbox */
406 2 if ((opt & OS_POST_OPT_BROADCAST) != 0x00) { /* Do we need to post msg to ALL waiting tasks ? */
407 3 while (pevent->OSEventGrp != 0x00) { /* Yes, Post to ALL tasks waiting on mailbox */
-
408 4 OS_EventTaskRdy(pevent, msg, OS_STAT_MBOX);
409 4 }
410 3 } else {
411 3 OS_EventTaskRdy(pevent, msg, OS_STAT_MBOX); /* No, Post to HPT waiting on mbox */
412 3 }
413 2 OS_EXIT_CRITICAL();
414 2 OS_Sched(); /* Find highest priority task ready to run */
415 2 return (OS_NO_ERR);
416 2 }
417 1 if (pevent->OSEventPtr != (void *)0) { /* Make sure mailbox doesn't already have a msg */
418 2 OS_EXIT_CRITICAL();
419 2 return (OS_MBOX_FULL);
420 2 }
421 1 pevent->OSEventPtr = msg; /* Place message in mailbox */
422 1 OS_EXIT_CRITICAL();
423 1 return (OS_NO_ERR);
424 1 }
425 #endif
C51 COMPILER V7.06 OS_MBOX 07/18/2003 11:05:58 PAGE 8
426
427 /*$PAGE*/
428 /*
429 *********************************************************************************************************
430 * QUERY A MESSAGE MAILBOX
431 *
432 * Description: This function obtains information about a message mailbox.
433 *
434 * Arguments : pevent is a pointer to the event control block associated with the desired mailbox
435 *
436 * pdata is a pointer to a structure that will contain information about the message
437 * mailbox.
438 *
439 * Returns : OS_NO_ERR The call was successful and the message was sent
440 * OS_ERR_EVENT_TYPE If you are attempting to obtain data from a non mailbox.
441 * OS_ERR_PEVENT_NULL If 'pevent' is a NULL pointer
442 *********************************************************************************************************
443 */
444
445 #if OS_MBOX_QUERY_EN > 0
446 INT8U OSMboxQuery (OS_EVENT *pevent, OS_MBOX_DATA *pndata) reentrant //using 0
447 {
448 1 #if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
449 1 OS_CPU_SR cpu_sr;
450 1 #endif
451 1 INT8U *psrc;
452 1 INT8U *pdest;
453 1
454 1
455 1 #if OS_ARG_CHK_EN > 0
456 1 if (pevent == (OS_EVENT *)0) { /* Validate 'pevent' */
457 2 return (OS_ERR_PEVENT_NULL);
458 2 }
459 1 #endif
460 1 if (pevent->OSEventType != OS_EVENT_TYPE_MBOX) { /* Validate event block type */
461 2 return (OS_ERR_EVENT_TYPE);
462 2 }
463 1 OS_ENTER_CRITICAL();
464 1 pndata->OSEventGrp = pevent->OSEventGrp; /* Copy message mailbox wait list */
465 1 psrc = &pevent->OSEventTbl[0];
466 1 pdest = &pndata->OSEventTbl[0];
467 1
468 1 #if OS_EVENT_TBL_SIZE > 0
469 1 *pdest++ = *psrc++;
470 1 #endif
471 1
472 1 #if OS_EVENT_TBL_SIZE > 1
473 1 *pdest++ = *psrc++;
474 1 #endif
475 1
476 1 #if OS_EVENT_TBL_SIZE > 2
477 1 *pdest++ = *psrc++;
478 1 #endif
479 1
480 1 #if OS_EVENT_TBL_SIZE > 3
481 1 *pdest++ = *psrc++;
482 1 #endif
483 1
484 1 #if OS_EVENT_TBL_SIZE > 4
485 1 *pdest++ = *psrc++;
486 1 #endif
487 1
C51 COMPILER V7.06 OS_MBOX 07/18/2003 11:05:58 PAGE 9
488 1 #if OS_EVENT_TBL_SIZE > 5
489 1 *pdest++ = *psrc++;
490 1 #endif
491 1
492 1 #if OS_EVENT_TBL_SIZE > 6
493 1 *pdest++ = *psrc++;
494 1 #endif
495 1
496 1 #if OS_EVENT_TBL_SIZE > 7
497 1 *pdest = *psrc;
498 1 #endif
499 1 pndata->OSMsg = pevent->OSEventPtr; /* Get message from mailbox */
500 1 OS_EXIT_CRITICAL();
501 1 return (OS_NO_ERR);
502 1 }
503 #endif /* OS_MBOX_QUERY_EN */
504 #endif /* OS_MBOX_EN */
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 3028 ----
CONSTANT SIZE = 2 ----
XDATA SIZE = ---- ----
PDATA SIZE = ---- ----
DATA SIZE = ---- ----
IDATA SIZE = ---- ----
BIT SIZE = ---- ----
END OF MODULE INFORMATION.
C51 COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)
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