UCOS_TI_LM3S_Keil
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函数
os_task.c 文件参考
#include <ucos_ii.h>
os_task.c 的引用(Include)关系图:

浏览源代码.

函数

INT8U OSTaskChangePrio (INT8U oldprio, INT8U newprio)
 
INT8U OSTaskCreate (void(*task)(void *p_arg), void *p_arg, OS_STK *ptos, INT8U prio)
 
INT8U OSTaskCreateExt (void(*task)(void *p_arg), void *p_arg, OS_STK *ptos, INT8U prio, INT16U id, OS_STK *pbos, INT32U stk_size, void *pext, INT16U opt)
 
INT8U OSTaskDel (INT8U prio)
 
INT8U OSTaskDelReq (INT8U prio)
 
INT8U OSTaskNameGet (INT8U prio, INT8U **pname, INT8U *perr)
 
void OSTaskNameSet (INT8U prio, INT8U *pname, INT8U *perr)
 
INT8U OSTaskResume (INT8U prio)
 
INT8U OSTaskStkChk (INT8U prio, OS_STK_DATA *p_stk_data)
 
INT8U OSTaskSuspend (INT8U prio)
 
INT8U OSTaskQuery (INT8U prio, OS_TCB *p_task_data)
 
INT32U OSTaskRegGet (INT8U prio, INT8U id, INT8U *perr)
 
void OSTaskRegSet (INT8U prio, INT8U id, INT32U value, INT8U *perr)
 
void OS_TaskReturn (void)
 
void OS_TaskStkClr (OS_STK *pbos, INT32U size, INT16U opt)
 

函数说明

INT8U OSTaskChangePrio ( INT8U  oldprio,
INT8U  newprio 
)

在文件 os_task.c 第 51 行定义.

参考 OS_ENTER_CRITICAL, OS_ERR_NONE, OS_ERR_PRIO, OS_ERR_PRIO_EXIST, OS_ERR_PRIO_INVALID, OS_ERR_TASK_NOT_EXIST, OS_EXIT_CRITICAL, OS_LOWEST_PRIO, OS_PRIO_SELF, OS_Sched(), OS_TCB_RESERVED, OS_TRUE, OS_EVENT::OSEventGrp, OS_EVENT::OSEventTbl, OSRdyGrp, OSRdyTbl, OSRunning, OS_TCB::OSTCBBitX, OS_TCB::OSTCBBitY, OSTCBCur, OS_TCB::OSTCBEventMultiPtr, OS_TCB::OSTCBEventPtr, OS_TCB::OSTCBPrio, OSTCBPrioTbl, OS_TCB::OSTCBX , 以及 OS_TCB::OSTCBY.

53 {
54 #if (OS_EVENT_EN)
55  OS_EVENT *pevent;
56 #if (OS_EVENT_MULTI_EN > 0u)
57  OS_EVENT **pevents;
58 #endif
59 #endif
60  OS_TCB *ptcb;
61  INT8U y_new;
62  INT8U x_new;
63  INT8U y_old;
64 #if OS_LOWEST_PRIO <= 63u
65  INT8U bity_new;
66  INT8U bitx_new;
67  INT8U bity_old;
68  INT8U bitx_old;
69 #else
70  INT16U bity_new;
71  INT16U bitx_new;
72  INT16U bity_old;
73  INT16U bitx_old;
74 #endif
75 #if OS_CRITICAL_METHOD == 3u
76  OS_CPU_SR cpu_sr = 0u; /* Storage for CPU status register */
77 #endif
78 
79 
80 /*$PAGE*/
81 #if OS_ARG_CHK_EN > 0u
82  if (oldprio >= OS_LOWEST_PRIO) {
83  if (oldprio != OS_PRIO_SELF) {
84  return (OS_ERR_PRIO_INVALID);
85  }
86  }
87  if (newprio >= OS_LOWEST_PRIO) {
88  return (OS_ERR_PRIO_INVALID);
89  }
90 #endif
91  OS_ENTER_CRITICAL();
92  if (OSTCBPrioTbl[newprio] != (OS_TCB *)0) { /* New priority must not already exist */
93  OS_EXIT_CRITICAL();
94  return (OS_ERR_PRIO_EXIST);
95  }
96  if (oldprio == OS_PRIO_SELF) { /* See if changing self */
97  oldprio = OSTCBCur->OSTCBPrio; /* Yes, get priority */
98  }
99  ptcb = OSTCBPrioTbl[oldprio];
100  if (ptcb == (OS_TCB *)0) { /* Does task to change exist? */
101  OS_EXIT_CRITICAL(); /* No, can't change its priority! */
102  return (OS_ERR_PRIO);
103  }
104  if (ptcb == OS_TCB_RESERVED) { /* Is task assigned to Mutex */
105  OS_EXIT_CRITICAL(); /* No, can't change its priority! */
106  return (OS_ERR_TASK_NOT_EXIST);
107  }
108 #if OS_LOWEST_PRIO <= 63u
109  y_new = (INT8U)(newprio >> 3); /* Yes, compute new TCB fields */
110  x_new = (INT8U)(newprio & 0x07);
111  bity_new = (INT8U)(1u << y_new);
112  bitx_new = (INT8U)(1u << x_new);
113 #else
114  y_new = (INT8U)((newprio >> 4) & 0x0F);
115  x_new = (INT8U)( newprio & 0x0F);
116  bity_new = (INT16U)(1u << y_new);
117  bitx_new = (INT16U)(1u << x_new);
118 #endif
119 
120  OSTCBPrioTbl[oldprio] = (OS_TCB *)0; /* Remove TCB from old priority */
121  OSTCBPrioTbl[newprio] = ptcb; /* Place pointer to TCB @ new priority */
122  y_old = ptcb->OSTCBY;
123  bity_old = ptcb->OSTCBBitY;
124  bitx_old = ptcb->OSTCBBitX;
125  if ((OSRdyTbl[y_old] & bitx_old) != 0u) { /* If task is ready make it not */
126  OSRdyTbl[y_old] &= ~bitx_old;
127  if (OSRdyTbl[y_old] == 0u) {
128  OSRdyGrp &= ~bity_old;
129  }
130  OSRdyGrp |= bity_new; /* Make new priority ready to run */
131  OSRdyTbl[y_new] |= bitx_new;
132  }
133 
134 #if (OS_EVENT_EN)
135  pevent = ptcb->OSTCBEventPtr;
136  if (pevent != (OS_EVENT *)0) {
137  pevent->OSEventTbl[y_old] &= ~bitx_old; /* Remove old task prio from wait list */
138  if (pevent->OSEventTbl[y_old] == 0u) {
139  pevent->OSEventGrp &= ~bity_old;
140  }
141  pevent->OSEventGrp |= bity_new; /* Add new task prio to wait list */
142  pevent->OSEventTbl[y_new] |= bitx_new;
143  }
144 #if (OS_EVENT_MULTI_EN > 0u)
145  if (ptcb->OSTCBEventMultiPtr != (OS_EVENT **)0) {
146  pevents = ptcb->OSTCBEventMultiPtr;
147  pevent = *pevents;
148  while (pevent != (OS_EVENT *)0) {
149  pevent->OSEventTbl[y_old] &= ~bitx_old; /* Remove old task prio from wait lists */
150  if (pevent->OSEventTbl[y_old] == 0u) {
151  pevent->OSEventGrp &= ~bity_old;
152  }
153  pevent->OSEventGrp |= bity_new; /* Add new task prio to wait lists */
154  pevent->OSEventTbl[y_new] |= bitx_new;
155  pevents++;
156  pevent = *pevents;
157  }
158  }
159 #endif
160 #endif
161 
162  ptcb->OSTCBPrio = newprio; /* Set new task priority */
163  ptcb->OSTCBY = y_new;
164  ptcb->OSTCBX = x_new;
165  ptcb->OSTCBBitY = bity_new;
166  ptcb->OSTCBBitX = bitx_new;
167  OS_EXIT_CRITICAL();
168  if (OSRunning == OS_TRUE) {
169  OS_Sched(); /* Find new highest priority task */
170  }
171  return (OS_ERR_NONE);
172 }

函数调用图:

INT8U OSTaskCreate ( void(*)(void *p_arg)  task,
void *  p_arg,
OS_STK *  ptos,
INT8U  prio 
)

在文件 os_task.c 第 216 行定义.

参考 OS_ENTER_CRITICAL, OS_ERR_NONE, OS_ERR_PRIO_EXIST, OS_ERR_PRIO_INVALID, OS_ERR_TASK_CREATE_ISR, OS_EXIT_CRITICAL, OS_LOWEST_PRIO, OS_Sched(), OS_TCB_RESERVED, OS_TCBInit(), OS_TRUE, OSIntNesting, OSRunning, OSTaskStkInit() , 以及 OSTCBPrioTbl.

参考自 OS_InitTaskIdle(), OS_InitTaskStat() , 以及 OSTmr_InitTask().

220 {
221  OS_STK *psp;
222  INT8U err;
223 #if OS_CRITICAL_METHOD == 3u /* Allocate storage for CPU status register */
224  OS_CPU_SR cpu_sr = 0u;
225 #endif
226 
227 
228 
229 #if OS_ARG_CHK_EN > 0u
230  if (prio > OS_LOWEST_PRIO) { /* Make sure priority is within allowable range */
231  return (OS_ERR_PRIO_INVALID);
232  }
233 #endif
234  OS_ENTER_CRITICAL();
235  if (OSIntNesting > 0u) { /* Make sure we don't create the task from within an ISR */
236  OS_EXIT_CRITICAL();
237  return (OS_ERR_TASK_CREATE_ISR);
238  }
239  if (OSTCBPrioTbl[prio] == (OS_TCB *)0) { /* Make sure task doesn't already exist at this priority */
240  OSTCBPrioTbl[prio] = OS_TCB_RESERVED;/* Reserve the priority to prevent others from doing ... */
241  /* ... the same thing until task is created. */
242  OS_EXIT_CRITICAL();
243  psp = OSTaskStkInit(task, p_arg, ptos, 0u); /* Initialize the task's stack */
244  err = OS_TCBInit(prio, psp, (OS_STK *)0, 0u, 0u, (void *)0, 0u);
245  if (err == OS_ERR_NONE) {
246  if (OSRunning == OS_TRUE) { /* Find highest priority task if multitasking has started */
247  OS_Sched();
248  }
249  } else {
250  OS_ENTER_CRITICAL();
251  OSTCBPrioTbl[prio] = (OS_TCB *)0;/* Make this priority available to others */
252  OS_EXIT_CRITICAL();
253  }
254  return (err);
255  }
256  OS_EXIT_CRITICAL();
257  return (OS_ERR_PRIO_EXIST);
258 }

函数调用图:

这是这个函数的调用关系图:

INT8U OSTaskCreateExt ( void(*)(void *p_arg)  task,
void *  p_arg,
OS_STK *  ptos,
INT8U  prio,
INT16U  id,
OS_STK *  pbos,
INT32U  stk_size,
void *  pext,
INT16U  opt 
)

在文件 os_task.c 第 332 行定义.

参考 OS_ENTER_CRITICAL, OS_ERR_NONE, OS_ERR_PRIO_EXIST, OS_ERR_PRIO_INVALID, OS_ERR_TASK_CREATE_ISR, OS_EXIT_CRITICAL, OS_LOWEST_PRIO, OS_Sched(), OS_TaskStkClr(), OS_TCB_RESERVED, OS_TCBInit(), OS_TRUE, OSIntNesting, OSRunning, OSTaskStkInit() , 以及 OSTCBPrioTbl.

参考自 App_TaskCreate(), main(), OS_InitTaskIdle(), OS_InitTaskStat() , 以及 OSTmr_InitTask().

341 {
342  OS_STK *psp;
343  INT8U err;
344 #if OS_CRITICAL_METHOD == 3u /* Allocate storage for CPU status register */
345  OS_CPU_SR cpu_sr = 0u;
346 #endif
347 
348 
349 
350 #if OS_ARG_CHK_EN > 0u
351  if (prio > OS_LOWEST_PRIO) { /* Make sure priority is within allowable range */
352  return (OS_ERR_PRIO_INVALID);
353  }
354 #endif
355  OS_ENTER_CRITICAL();
356  if (OSIntNesting > 0u) { /* Make sure we don't create the task from within an ISR */
357  OS_EXIT_CRITICAL();
358  return (OS_ERR_TASK_CREATE_ISR);
359  }
360  if (OSTCBPrioTbl[prio] == (OS_TCB *)0) { /* Make sure task doesn't already exist at this priority */
361  OSTCBPrioTbl[prio] = OS_TCB_RESERVED;/* Reserve the priority to prevent others from doing ... */
362  /* ... the same thing until task is created. */
363  OS_EXIT_CRITICAL();
364 
365 #if (OS_TASK_STAT_STK_CHK_EN > 0u)
366  OS_TaskStkClr(pbos, stk_size, opt); /* Clear the task stack (if needed) */
367 #endif
368 
369  psp = OSTaskStkInit(task, p_arg, ptos, opt); /* Initialize the task's stack */
370  err = OS_TCBInit(prio, psp, pbos, id, stk_size, pext, opt);
371  if (err == OS_ERR_NONE) {
372  if (OSRunning == OS_TRUE) { /* Find HPT if multitasking has started */
373  OS_Sched();
374  }
375  } else {
376  OS_ENTER_CRITICAL();
377  OSTCBPrioTbl[prio] = (OS_TCB *)0; /* Make this priority avail. to others */
378  OS_EXIT_CRITICAL();
379  }
380  return (err);
381  }
382  OS_EXIT_CRITICAL();
383  return (OS_ERR_PRIO_EXIST);
384 }

函数调用图:

这是这个函数的调用关系图:

INT8U OSTaskDel ( INT8U  prio)

在文件 os_task.c 第 424 行定义.

参考 OS_Dummy(), OS_ENTER_CRITICAL, OS_ERR_NONE, OS_ERR_PRIO_INVALID, OS_ERR_TASK_DEL, OS_ERR_TASK_DEL_IDLE, OS_ERR_TASK_DEL_ISR, OS_ERR_TASK_NOT_EXIST, OS_EventTaskRemove(), OS_EventTaskRemoveMulti(), OS_EXIT_CRITICAL, OS_FlagUnlink(), OS_LOWEST_PRIO, OS_PRIO_SELF, OS_Sched(), OS_STAT_PEND_OK, OS_STAT_RDY, OS_TASK_IDLE_PRIO, OS_TCB_RESERVED, OS_TRUE, OSIntNesting, OSLockNesting, OSRdyGrp, OSRdyTbl, OSRunning, OSTaskCtr, OSTaskDelHook(), OS_TCB::OSTCBBitX, OS_TCB::OSTCBBitY, OSTCBCur, OS_TCB::OSTCBDly, OS_TCB::OSTCBEventMultiPtr, OS_TCB::OSTCBEventPtr, OS_TCB::OSTCBFlagNode, OSTCBFreeList, OSTCBList, OS_TCB::OSTCBNext, OS_TCB::OSTCBPrev, OS_TCB::OSTCBPrio, OSTCBPrioTbl, OS_TCB::OSTCBStat, OS_TCB::OSTCBStatPend, OS_TCB::OSTCBTaskName , 以及 OS_TCB::OSTCBY.

参考自 OS_TaskReturn().

425 {
426 #if (OS_FLAG_EN > 0u) && (OS_MAX_FLAGS > 0u)
427  OS_FLAG_NODE *pnode;
428 #endif
429  OS_TCB *ptcb;
430 #if OS_CRITICAL_METHOD == 3u /* Allocate storage for CPU status register */
431  OS_CPU_SR cpu_sr = 0u;
432 #endif
433 
434 
435 
436  if (OSIntNesting > 0u) { /* See if trying to delete from ISR */
437  return (OS_ERR_TASK_DEL_ISR);
438  }
439  if (prio == OS_TASK_IDLE_PRIO) { /* Not allowed to delete idle task */
440  return (OS_ERR_TASK_DEL_IDLE);
441  }
442 #if OS_ARG_CHK_EN > 0u
443  if (prio >= OS_LOWEST_PRIO) { /* Task priority valid ? */
444  if (prio != OS_PRIO_SELF) {
445  return (OS_ERR_PRIO_INVALID);
446  }
447  }
448 #endif
449 
450 /*$PAGE*/
451  OS_ENTER_CRITICAL();
452  if (prio == OS_PRIO_SELF) { /* See if requesting to delete self */
453  prio = OSTCBCur->OSTCBPrio; /* Set priority to delete to current */
454  }
455  ptcb = OSTCBPrioTbl[prio];
456  if (ptcb == (OS_TCB *)0) { /* Task to delete must exist */
457  OS_EXIT_CRITICAL();
458  return (OS_ERR_TASK_NOT_EXIST);
459  }
460  if (ptcb == OS_TCB_RESERVED) { /* Must not be assigned to Mutex */
461  OS_EXIT_CRITICAL();
462  return (OS_ERR_TASK_DEL);
463  }
464 
465  OSRdyTbl[ptcb->OSTCBY] &= ~ptcb->OSTCBBitX;
466  if (OSRdyTbl[ptcb->OSTCBY] == 0u) { /* Make task not ready */
467  OSRdyGrp &= ~ptcb->OSTCBBitY;
468  }
469 
470 #if (OS_EVENT_EN)
471  if (ptcb->OSTCBEventPtr != (OS_EVENT *)0) {
472  OS_EventTaskRemove(ptcb, ptcb->OSTCBEventPtr); /* Remove this task from any event wait list */
473  }
474 #if (OS_EVENT_MULTI_EN > 0u)
475  if (ptcb->OSTCBEventMultiPtr != (OS_EVENT **)0) { /* Remove this task from any events' wait lists*/
476  OS_EventTaskRemoveMulti(ptcb, ptcb->OSTCBEventMultiPtr);
477  }
478 #endif
479 #endif
480 
481 #if (OS_FLAG_EN > 0u) && (OS_MAX_FLAGS > 0u)
482  pnode = ptcb->OSTCBFlagNode;
483  if (pnode != (OS_FLAG_NODE *)0) { /* If task is waiting on event flag */
484  OS_FlagUnlink(pnode); /* Remove from wait list */
485  }
486 #endif
487 
488  ptcb->OSTCBDly = 0u; /* Prevent OSTimeTick() from updating */
489  ptcb->OSTCBStat = OS_STAT_RDY; /* Prevent task from being resumed */
490  ptcb->OSTCBStatPend = OS_STAT_PEND_OK;
491  if (OSLockNesting < 255u) { /* Make sure we don't context switch */
492  OSLockNesting++;
493  }
494  OS_EXIT_CRITICAL(); /* Enabling INT. ignores next instruc. */
495  OS_Dummy(); /* ... Dummy ensures that INTs will be */
496  OS_ENTER_CRITICAL(); /* ... disabled HERE! */
497  if (OSLockNesting > 0u) { /* Remove context switch lock */
498  OSLockNesting--;
499  }
500  OSTaskDelHook(ptcb); /* Call user defined hook */
501  OSTaskCtr--; /* One less task being managed */
502  OSTCBPrioTbl[prio] = (OS_TCB *)0; /* Clear old priority entry */
503  if (ptcb->OSTCBPrev == (OS_TCB *)0) { /* Remove from TCB chain */
504  ptcb->OSTCBNext->OSTCBPrev = (OS_TCB *)0;
505  OSTCBList = ptcb->OSTCBNext;
506  } else {
507  ptcb->OSTCBPrev->OSTCBNext = ptcb->OSTCBNext;
508  ptcb->OSTCBNext->OSTCBPrev = ptcb->OSTCBPrev;
509  }
510  ptcb->OSTCBNext = OSTCBFreeList; /* Return TCB to free TCB list */
511  OSTCBFreeList = ptcb;
512 #if OS_TASK_NAME_EN > 0u
513  ptcb->OSTCBTaskName = (INT8U *)"?";
514 #endif
515  OS_EXIT_CRITICAL();
516  if (OSRunning == OS_TRUE) {
517  OS_Sched(); /* Find new highest priority task */
518  }
519  return (OS_ERR_NONE);
520 }

函数调用图:

这是这个函数的调用关系图:

INT8U OSTaskDelReq ( INT8U  prio)

在文件 os_task.c 第 570 行定义.

参考 OS_ENTER_CRITICAL, OS_ERR_NONE, OS_ERR_PRIO_INVALID, OS_ERR_TASK_DEL, OS_ERR_TASK_DEL_IDLE, OS_ERR_TASK_DEL_REQ, OS_ERR_TASK_NOT_EXIST, OS_EXIT_CRITICAL, OS_LOWEST_PRIO, OS_PRIO_SELF, OS_TASK_IDLE_PRIO, OS_TCB_RESERVED, OSTCBCur, OS_TCB::OSTCBDelReq , 以及 OSTCBPrioTbl.

571 {
572  INT8U stat;
573  OS_TCB *ptcb;
574 #if OS_CRITICAL_METHOD == 3u /* Allocate storage for CPU status register */
575  OS_CPU_SR cpu_sr = 0u;
576 #endif
577 
578 
579 
580  if (prio == OS_TASK_IDLE_PRIO) { /* Not allowed to delete idle task */
581  return (OS_ERR_TASK_DEL_IDLE);
582  }
583 #if OS_ARG_CHK_EN > 0u
584  if (prio >= OS_LOWEST_PRIO) { /* Task priority valid ? */
585  if (prio != OS_PRIO_SELF) {
586  return (OS_ERR_PRIO_INVALID);
587  }
588  }
589 #endif
590  if (prio == OS_PRIO_SELF) { /* See if a task is requesting to ... */
591  OS_ENTER_CRITICAL(); /* ... this task to delete itself */
592  stat = OSTCBCur->OSTCBDelReq; /* Return request status to caller */
593  OS_EXIT_CRITICAL();
594  return (stat);
595  }
596  OS_ENTER_CRITICAL();
597  ptcb = OSTCBPrioTbl[prio];
598  if (ptcb == (OS_TCB *)0) { /* Task to delete must exist */
599  OS_EXIT_CRITICAL();
600  return (OS_ERR_TASK_NOT_EXIST); /* Task must already be deleted */
601  }
602  if (ptcb == OS_TCB_RESERVED) { /* Must NOT be assigned to a Mutex */
603  OS_EXIT_CRITICAL();
604  return (OS_ERR_TASK_DEL);
605  }
606  ptcb->OSTCBDelReq = OS_ERR_TASK_DEL_REQ; /* Set flag indicating task to be DEL. */
607  OS_EXIT_CRITICAL();
608  return (OS_ERR_NONE);
609 }
INT8U OSTaskNameGet ( INT8U  prio,
INT8U **  pname,
INT8U *  perr 
)

在文件 os_task.c 第 637 行定义.

参考 OS_ENTER_CRITICAL, OS_ERR_NAME_GET_ISR, OS_ERR_NONE, OS_ERR_PNAME_NULL, OS_ERR_PRIO_INVALID, OS_ERR_TASK_NOT_EXIST, OS_EXIT_CRITICAL, OS_LOWEST_PRIO, OS_PRIO_SELF, OS_StrLen(), OS_TCB_RESERVED, OSIntNesting, OSTCBCur, OS_TCB::OSTCBPrio, OSTCBPrioTbl , 以及 OS_TCB::OSTCBTaskName.

640 {
641  OS_TCB *ptcb;
642  INT8U len;
643 #if OS_CRITICAL_METHOD == 3u /* Allocate storage for CPU status register */
644  OS_CPU_SR cpu_sr = 0u;
645 #endif
646 
647 
648 
649 #if OS_ARG_CHK_EN > 0u
650  if (perr == (INT8U *)0) { /* Validate 'perr' */
651  return (0u);
652  }
653  if (prio > OS_LOWEST_PRIO) { /* Task priority valid ? */
654  if (prio != OS_PRIO_SELF) {
655  *perr = OS_ERR_PRIO_INVALID; /* No */
656  return (0u);
657  }
658  }
659  if (pname == (INT8U **)0) { /* Is 'pname' a NULL pointer? */
660  *perr = OS_ERR_PNAME_NULL; /* Yes */
661  return (0u);
662  }
663 #endif
664  if (OSIntNesting > 0u) { /* See if trying to call from an ISR */
665  *perr = OS_ERR_NAME_GET_ISR;
666  return (0u);
667  }
668  OS_ENTER_CRITICAL();
669  if (prio == OS_PRIO_SELF) { /* See if caller desires it's own name */
670  prio = OSTCBCur->OSTCBPrio;
671  }
672  ptcb = OSTCBPrioTbl[prio];
673  if (ptcb == (OS_TCB *)0) { /* Does task exist? */
674  OS_EXIT_CRITICAL(); /* No */
675  *perr = OS_ERR_TASK_NOT_EXIST;
676  return (0u);
677  }
678  if (ptcb == OS_TCB_RESERVED) { /* Task assigned to a Mutex? */
679  OS_EXIT_CRITICAL(); /* Yes */
680  *perr = OS_ERR_TASK_NOT_EXIST;
681  return (0u);
682  }
683  *pname = ptcb->OSTCBTaskName;
684  len = OS_StrLen(*pname);
685  OS_EXIT_CRITICAL();
686  *perr = OS_ERR_NONE;
687  return (len);
688 }

函数调用图:

void OSTaskNameSet ( INT8U  prio,
INT8U *  pname,
INT8U *  perr 
)

在文件 os_task.c 第 715 行定义.

参考 OS_ENTER_CRITICAL, OS_ERR_NAME_SET_ISR, OS_ERR_NONE, OS_ERR_PNAME_NULL, OS_ERR_PRIO_INVALID, OS_ERR_TASK_NOT_EXIST, OS_EXIT_CRITICAL, OS_LOWEST_PRIO, OS_PRIO_SELF, OS_TCB_RESERVED, OSIntNesting, OSTCBCur, OS_TCB::OSTCBPrio, OSTCBPrioTbl , 以及 OS_TCB::OSTCBTaskName.

参考自 App_TaskCreate(), main(), OS_InitTaskIdle(), OS_InitTaskStat() , 以及 OSTmr_InitTask().

718 {
719  OS_TCB *ptcb;
720 #if OS_CRITICAL_METHOD == 3u /* Allocate storage for CPU status register */
721  OS_CPU_SR cpu_sr = 0u;
722 #endif
723 
724 
725 
726 #if OS_ARG_CHK_EN > 0u
727  if (perr == (INT8U *)0) { /* Validate 'perr' */
728  return;
729  }
730  if (prio > OS_LOWEST_PRIO) { /* Task priority valid ? */
731  if (prio != OS_PRIO_SELF) {
732  *perr = OS_ERR_PRIO_INVALID; /* No */
733  return;
734  }
735  }
736  if (pname == (INT8U *)0) { /* Is 'pname' a NULL pointer? */
737  *perr = OS_ERR_PNAME_NULL; /* Yes */
738  return;
739  }
740 #endif
741  if (OSIntNesting > 0u) { /* See if trying to call from an ISR */
742  *perr = OS_ERR_NAME_SET_ISR;
743  return;
744  }
745  OS_ENTER_CRITICAL();
746  if (prio == OS_PRIO_SELF) { /* See if caller desires to set it's own name */
747  prio = OSTCBCur->OSTCBPrio;
748  }
749  ptcb = OSTCBPrioTbl[prio];
750  if (ptcb == (OS_TCB *)0) { /* Does task exist? */
751  OS_EXIT_CRITICAL(); /* No */
752  *perr = OS_ERR_TASK_NOT_EXIST;
753  return;
754  }
755  if (ptcb == OS_TCB_RESERVED) { /* Task assigned to a Mutex? */
756  OS_EXIT_CRITICAL(); /* Yes */
757  *perr = OS_ERR_TASK_NOT_EXIST;
758  return;
759  }
760  ptcb->OSTCBTaskName = pname;
761  OS_EXIT_CRITICAL();
762  *perr = OS_ERR_NONE;
763 }

这是这个函数的调用关系图:

INT8U OSTaskResume ( INT8U  prio)

在文件 os_task.c 第 786 行定义.

参考 OS_ENTER_CRITICAL, OS_ERR_NONE, OS_ERR_PRIO_INVALID, OS_ERR_TASK_NOT_EXIST, OS_ERR_TASK_NOT_SUSPENDED, OS_ERR_TASK_RESUME_PRIO, OS_EXIT_CRITICAL, OS_LOWEST_PRIO, OS_Sched(), OS_STAT_RDY, OS_STAT_SUSPEND, OS_TCB_RESERVED, OS_TRUE, OSRdyGrp, OSRdyTbl, OSRunning, OS_TCB::OSTCBBitX, OS_TCB::OSTCBBitY, OS_TCB::OSTCBDly, OSTCBPrioTbl, OS_TCB::OSTCBStat , 以及 OS_TCB::OSTCBY.

787 {
788  OS_TCB *ptcb;
789 #if OS_CRITICAL_METHOD == 3u /* Storage for CPU status register */
790  OS_CPU_SR cpu_sr = 0u;
791 #endif
792 
793 
794 
795 #if OS_ARG_CHK_EN > 0u
796  if (prio >= OS_LOWEST_PRIO) { /* Make sure task priority is valid */
797  return (OS_ERR_PRIO_INVALID);
798  }
799 #endif
800  OS_ENTER_CRITICAL();
801  ptcb = OSTCBPrioTbl[prio];
802  if (ptcb == (OS_TCB *)0) { /* Task to suspend must exist */
803  OS_EXIT_CRITICAL();
804  return (OS_ERR_TASK_RESUME_PRIO);
805  }
806  if (ptcb == OS_TCB_RESERVED) { /* See if assigned to Mutex */
807  OS_EXIT_CRITICAL();
808  return (OS_ERR_TASK_NOT_EXIST);
809  }
810  if ((ptcb->OSTCBStat & OS_STAT_SUSPEND) != OS_STAT_RDY) { /* Task must be suspended */
811  ptcb->OSTCBStat &= ~(INT8U)OS_STAT_SUSPEND; /* Remove suspension */
812  if (ptcb->OSTCBStat == OS_STAT_RDY) { /* See if task is now ready */
813  if (ptcb->OSTCBDly == 0u) {
814  OSRdyGrp |= ptcb->OSTCBBitY; /* Yes, Make task ready to run */
815  OSRdyTbl[ptcb->OSTCBY] |= ptcb->OSTCBBitX;
816  OS_EXIT_CRITICAL();
817  if (OSRunning == OS_TRUE) {
818  OS_Sched(); /* Find new highest priority task */
819  }
820  } else {
821  OS_EXIT_CRITICAL();
822  }
823  } else { /* Must be pending on event */
824  OS_EXIT_CRITICAL();
825  }
826  return (OS_ERR_NONE);
827  }
828  OS_EXIT_CRITICAL();
829  return (OS_ERR_TASK_NOT_SUSPENDED);
830 }

函数调用图:

INT8U OSTaskStkChk ( INT8U  prio,
OS_STK_DATA *  p_stk_data 
)

在文件 os_task.c 第 853 行定义.

参考 OS_ENTER_CRITICAL, OS_ERR_NONE, OS_ERR_PDATA_NULL, OS_ERR_PRIO_INVALID, OS_ERR_TASK_NOT_EXIST, OS_ERR_TASK_OPT, OS_EXIT_CRITICAL, OS_LOWEST_PRIO, OS_PRIO_SELF, OS_TASK_OPT_STK_CHK, OS_TCB_RESERVED, OS_STK_DATA::OSFree, OSTCBCur, OS_TCB::OSTCBOpt, OS_TCB::OSTCBPrio, OSTCBPrioTbl, OS_TCB::OSTCBStkBottom, OS_TCB::OSTCBStkSize , 以及 OS_STK_DATA::OSUsed.

参考自 OS_TaskStatStkChk().

855 {
856  OS_TCB *ptcb;
857  OS_STK *pchk;
858  INT32U nfree;
859  INT32U size;
860 #if OS_CRITICAL_METHOD == 3u /* Allocate storage for CPU status register */
861  OS_CPU_SR cpu_sr = 0u;
862 #endif
863 
864 
865 
866 #if OS_ARG_CHK_EN > 0u
867  if (prio > OS_LOWEST_PRIO) { /* Make sure task priority is valid */
868  if (prio != OS_PRIO_SELF) {
869  return (OS_ERR_PRIO_INVALID);
870  }
871  }
872  if (p_stk_data == (OS_STK_DATA *)0) { /* Validate 'p_stk_data' */
873  return (OS_ERR_PDATA_NULL);
874  }
875 #endif
876  p_stk_data->OSFree = 0u; /* Assume failure, set to 0 size */
877  p_stk_data->OSUsed = 0u;
878  OS_ENTER_CRITICAL();
879  if (prio == OS_PRIO_SELF) { /* See if check for SELF */
880  prio = OSTCBCur->OSTCBPrio;
881  }
882  ptcb = OSTCBPrioTbl[prio];
883  if (ptcb == (OS_TCB *)0) { /* Make sure task exist */
884  OS_EXIT_CRITICAL();
885  return (OS_ERR_TASK_NOT_EXIST);
886  }
887  if (ptcb == OS_TCB_RESERVED) {
888  OS_EXIT_CRITICAL();
889  return (OS_ERR_TASK_NOT_EXIST);
890  }
891  if ((ptcb->OSTCBOpt & OS_TASK_OPT_STK_CHK) == 0u) { /* Make sure stack checking option is set */
892  OS_EXIT_CRITICAL();
893  return (OS_ERR_TASK_OPT);
894  }
895  nfree = 0u;
896  size = ptcb->OSTCBStkSize;
897  pchk = ptcb->OSTCBStkBottom;
898  OS_EXIT_CRITICAL();
899 #if OS_STK_GROWTH == 1u
900  while (*pchk++ == (OS_STK)0) { /* Compute the number of zero entries on the stk */
901  nfree++;
902  }
903 #else
904  while (*pchk-- == (OS_STK)0) {
905  nfree++;
906  }
907 #endif
908  p_stk_data->OSFree = nfree * sizeof(OS_STK); /* Compute number of free bytes on the stack */
909  p_stk_data->OSUsed = (size - nfree) * sizeof(OS_STK); /* Compute number of bytes used on the stack */
910  return (OS_ERR_NONE);
911 }

这是这个函数的调用关系图:

INT8U OSTaskSuspend ( INT8U  prio)

在文件 os_task.c 第 938 行定义.

参考 OS_ENTER_CRITICAL, OS_ERR_NONE, OS_ERR_PRIO_INVALID, OS_ERR_TASK_NOT_EXIST, OS_ERR_TASK_SUSPEND_IDLE, OS_ERR_TASK_SUSPEND_PRIO, OS_EXIT_CRITICAL, OS_FALSE, OS_LOWEST_PRIO, OS_PRIO_SELF, OS_Sched(), OS_STAT_SUSPEND, OS_TASK_IDLE_PRIO, OS_TCB_RESERVED, OS_TRUE, OSRdyGrp, OSRdyTbl, OS_TCB::OSTCBBitX, OS_TCB::OSTCBBitY, OSTCBCur, OS_TCB::OSTCBPrio, OSTCBPrioTbl, OS_TCB::OSTCBStat , 以及 OS_TCB::OSTCBY.

参考自 OS_TaskStat().

939 {
940  BOOLEAN self;
941  OS_TCB *ptcb;
942  INT8U y;
943 #if OS_CRITICAL_METHOD == 3u /* Allocate storage for CPU status register */
944  OS_CPU_SR cpu_sr = 0u;
945 #endif
946 
947 
948 
949 #if OS_ARG_CHK_EN > 0u
950  if (prio == OS_TASK_IDLE_PRIO) { /* Not allowed to suspend idle task */
951  return (OS_ERR_TASK_SUSPEND_IDLE);
952  }
953  if (prio >= OS_LOWEST_PRIO) { /* Task priority valid ? */
954  if (prio != OS_PRIO_SELF) {
955  return (OS_ERR_PRIO_INVALID);
956  }
957  }
958 #endif
959  OS_ENTER_CRITICAL();
960  if (prio == OS_PRIO_SELF) { /* See if suspend SELF */
961  prio = OSTCBCur->OSTCBPrio;
962  self = OS_TRUE;
963  } else if (prio == OSTCBCur->OSTCBPrio) { /* See if suspending self */
964  self = OS_TRUE;
965  } else {
966  self = OS_FALSE; /* No suspending another task */
967  }
968  ptcb = OSTCBPrioTbl[prio];
969  if (ptcb == (OS_TCB *)0) { /* Task to suspend must exist */
970  OS_EXIT_CRITICAL();
971  return (OS_ERR_TASK_SUSPEND_PRIO);
972  }
973  if (ptcb == OS_TCB_RESERVED) { /* See if assigned to Mutex */
974  OS_EXIT_CRITICAL();
975  return (OS_ERR_TASK_NOT_EXIST);
976  }
977  y = ptcb->OSTCBY;
978  OSRdyTbl[y] &= ~ptcb->OSTCBBitX; /* Make task not ready */
979  if (OSRdyTbl[y] == 0u) {
980  OSRdyGrp &= ~ptcb->OSTCBBitY;
981  }
982  ptcb->OSTCBStat |= OS_STAT_SUSPEND; /* Status of task is 'SUSPENDED' */
983  OS_EXIT_CRITICAL();
984  if (self == OS_TRUE) { /* Context switch only if SELF */
985  OS_Sched(); /* Find new highest priority task */
986  }
987  return (OS_ERR_NONE);
988 }

函数调用图:

这是这个函数的调用关系图:

INT8U OSTaskQuery ( INT8U  prio,
OS_TCB *  p_task_data 
)

在文件 os_task.c 第 1011 行定义.

参考 OS_ENTER_CRITICAL, OS_ERR_NONE, OS_ERR_PDATA_NULL, OS_ERR_PRIO, OS_ERR_PRIO_INVALID, OS_ERR_TASK_NOT_EXIST, OS_EXIT_CRITICAL, OS_LOWEST_PRIO, OS_MemCopy(), OS_PRIO_SELF, OS_TCB_RESERVED, OSTCBCur, OS_TCB::OSTCBPrio , 以及 OSTCBPrioTbl.

1013 {
1014  OS_TCB *ptcb;
1015 #if OS_CRITICAL_METHOD == 3u /* Allocate storage for CPU status register */
1016  OS_CPU_SR cpu_sr = 0u;
1017 #endif
1018 
1019 
1020 
1021 #if OS_ARG_CHK_EN > 0u
1022  if (prio > OS_LOWEST_PRIO) { /* Task priority valid ? */
1023  if (prio != OS_PRIO_SELF) {
1024  return (OS_ERR_PRIO_INVALID);
1025  }
1026  }
1027  if (p_task_data == (OS_TCB *)0) { /* Validate 'p_task_data' */
1028  return (OS_ERR_PDATA_NULL);
1029  }
1030 #endif
1031  OS_ENTER_CRITICAL();
1032  if (prio == OS_PRIO_SELF) { /* See if suspend SELF */
1033  prio = OSTCBCur->OSTCBPrio;
1034  }
1035  ptcb = OSTCBPrioTbl[prio];
1036  if (ptcb == (OS_TCB *)0) { /* Task to query must exist */
1037  OS_EXIT_CRITICAL();
1038  return (OS_ERR_PRIO);
1039  }
1040  if (ptcb == OS_TCB_RESERVED) { /* Task to query must not be assigned to a Mutex */
1041  OS_EXIT_CRITICAL();
1042  return (OS_ERR_TASK_NOT_EXIST);
1043  }
1044  /* Copy TCB into user storage area */
1045  OS_MemCopy((INT8U *)p_task_data, (INT8U *)ptcb, sizeof(OS_TCB));
1046  OS_EXIT_CRITICAL();
1047  return (OS_ERR_NONE);
1048 }

函数调用图:

INT32U OSTaskRegGet ( INT8U  prio,
INT8U  id,
INT8U *  perr 
)

在文件 os_task.c 第 1078 行定义.

参考 OS_ENTER_CRITICAL, OS_ERR_ID_INVALID, OS_ERR_NONE, OS_ERR_PRIO_INVALID, OS_EXIT_CRITICAL, OS_LOWEST_PRIO, OS_PRIO_SELF, OS_TASK_REG_TBL_SIZE, OSTCBCur, OSTCBPrioTbl , 以及 OS_TCB::OSTCBRegTbl.

1081 {
1082 #if OS_CRITICAL_METHOD == 3u /* Allocate storage for CPU status register */
1083  OS_CPU_SR cpu_sr = 0u;
1084 #endif
1085  INT32U value;
1086  OS_TCB *ptcb;
1087 
1088 
1089 #if OS_ARG_CHK_EN > 0u
1090  if (prio >= OS_LOWEST_PRIO) {
1091  if (prio != OS_PRIO_SELF) {
1092  *perr = OS_ERR_PRIO_INVALID;
1093  return (0u);
1094  }
1095  }
1096  if (id >= OS_TASK_REG_TBL_SIZE) {
1097  *perr = OS_ERR_ID_INVALID;
1098  return (0u);
1099  }
1100 #endif
1101  OS_ENTER_CRITICAL();
1102  if (prio == OS_PRIO_SELF) { /* See if need to get register from current task */
1103  ptcb = OSTCBCur;
1104  } else {
1105  ptcb = OSTCBPrioTbl[prio];
1106  }
1107  value = ptcb->OSTCBRegTbl[id];
1108  OS_EXIT_CRITICAL();
1109  *perr = OS_ERR_NONE;
1110  return (value);
1111 }
void OSTaskRegSet ( INT8U  prio,
INT8U  id,
INT32U  value,
INT8U *  perr 
)

在文件 os_task.c 第 1144 行定义.

参考 OS_ENTER_CRITICAL, OS_ERR_ID_INVALID, OS_ERR_NONE, OS_ERR_PRIO_INVALID, OS_EXIT_CRITICAL, OS_LOWEST_PRIO, OS_PRIO_SELF, OS_TASK_REG_TBL_SIZE, OSTCBCur, OSTCBPrioTbl , 以及 OS_TCB::OSTCBRegTbl.

1148 {
1149 #if OS_CRITICAL_METHOD == 3u /* Allocate storage for CPU status register */
1150  OS_CPU_SR cpu_sr = 0u;
1151 #endif
1152  OS_TCB *ptcb;
1153 
1154 
1155 #if OS_ARG_CHK_EN > 0u
1156  if (prio >= OS_LOWEST_PRIO) {
1157  if (prio != OS_PRIO_SELF) {
1158  *perr = OS_ERR_PRIO_INVALID;
1159  return;
1160  }
1161  }
1162  if (id >= OS_TASK_REG_TBL_SIZE) {
1163  *perr = OS_ERR_ID_INVALID;
1164  return;
1165  }
1166 #endif
1167  OS_ENTER_CRITICAL();
1168  if (prio == OS_PRIO_SELF) { /* See if need to get register from current task */
1169  ptcb = OSTCBCur;
1170  } else {
1171  ptcb = OSTCBPrioTbl[prio];
1172  }
1173  ptcb->OSTCBRegTbl[id] = value;
1174  OS_EXIT_CRITICAL();
1175  *perr = OS_ERR_NONE;
1176 }
void OS_TaskReturn ( void  )

在文件 os_task.c 第 1195 行定义.

参考 OS_PRIO_SELF, OS_TICKS_PER_SEC, OSTaskDel(), OSTaskReturnHook(), OSTCBCur , 以及 OSTimeDly().

参考自 OSTaskStkInit().

1196 {
1197  OSTaskReturnHook(OSTCBCur); /* Call hook to let user decide on what to do */
1198 
1199 #if OS_TASK_DEL_EN > 0u
1200  (void)OSTaskDel(OS_PRIO_SELF); /* Delete task if it accidentally returns! */
1201 #else
1202  for (;;) {
1203  OSTimeDly(OS_TICKS_PER_SEC);
1204  }
1205 #endif
1206 }

函数调用图:

这是这个函数的调用关系图:

void OS_TaskStkClr ( OS_STK *  pbos,
INT32U  size,
INT16U  opt 
)

在文件 os_task.c 第 1232 行定义.

参考 OS_TASK_OPT_STK_CHK , 以及 OS_TASK_OPT_STK_CLR.

参考自 OSTaskCreateExt().

1235 {
1236  if ((opt & OS_TASK_OPT_STK_CHK) != 0x0000u) { /* See if stack checking has been enabled */
1237  if ((opt & OS_TASK_OPT_STK_CLR) != 0x0000u) { /* See if stack needs to be cleared */
1238 #if OS_STK_GROWTH == 1u
1239  while (size > 0u) { /* Stack grows from HIGH to LOW memory */
1240  size--;
1241  *pbos++ = (OS_STK)0; /* Clear from bottom of stack and up! */
1242  }
1243 #else
1244  while (size > 0u) { /* Stack grows from LOW to HIGH memory */
1245  size--;
1246  *pbos-- = (OS_STK)0; /* Clear from bottom of stack and down */
1247  }
1248 #endif
1249  }
1250  }
1251 }

这是这个函数的调用关系图: