From 6fdacf89c753ed60ea652d8ccb27dc79a25da55c Mon Sep 17 00:00:00 2001
From: tree <1913915946@qq.com>
Date: Thu, 28 Dec 2023 00:09:42 +0800
Subject: [PATCH] =?UTF-8?q?=E6=9B=B4=E6=96=B0=E4=BA=86task.c=E7=9A=84?=
 =?UTF-8?q?=E6=B3=A8=E9=87=8A?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 doc/用例_oujiashu.docx   | Bin 14253 -> 0 bytes
 src/kernel/base/los_task.c |  62 ++++++++++++++++++++++---------------
 2 files changed, 37 insertions(+), 25 deletions(-)
 delete mode 100644 doc/用例_oujiashu.docx

diff --git a/doc/用例_oujiashu.docx b/doc/用例_oujiashu.docx
deleted file mode 100644
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diff --git a/src/kernel/base/los_task.c b/src/kernel/base/los_task.c
index c771be6..31de5b0 100644
--- a/src/kernel/base/los_task.c
+++ b/src/kernel/base/los_task.c
@@ -25,7 +25,7 @@
  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  * --------------------------------------------------------------------------- */
-
+/*关于LiteOS中任务管理模块的部分实现，包括任务控制块的初始化、任务创建、任务删除等功能*/
 #include "los_task_pri.h"
 #include "los_priqueue_pri.h"
 #include "los_sem_pri.h"
@@ -282,7 +282,7 @@ LITE_OS_SEC_TEXT VOID OsTaskScan(VOID)
         LOS_Schedule();
     }
 }
-
+//OsTaskInit用于初始化任务管理模块，包括任务控制块数组、空闲任务列表、任务回收列表等数据结构的初始化
 LITE_OS_SEC_TEXT_INIT UINT32 OsTaskInit(VOID)
 {
     UINT32 index;
@@ -335,7 +335,7 @@ UINT32 OsGetIdleTaskId(VOID)
     Percpu *perCpu = OsPercpuGet();
     return perCpu->idleTaskId;
 }
-
+//创建空闲任务（Idle Task）
 LITE_OS_SEC_TEXT_INIT UINT32 OsIdleTaskCreate(VOID)
 {
     UINT32 ret;
@@ -363,6 +363,7 @@ LITE_OS_SEC_TEXT_INIT UINT32 OsIdleTaskCreate(VOID)
  * Description : get id of current running task.
  * Return      : task id
  */
+//读取任务ID
 LITE_OS_SEC_TEXT UINT32 LOS_CurTaskIDGet(VOID)
 {
     LosTaskCB *runTask = OsCurrTaskGet();
@@ -372,7 +373,7 @@ LITE_OS_SEC_TEXT UINT32 LOS_CurTaskIDGet(VOID)
     }
     return runTask->taskId;
 }
-
+//获取当前正在运行的任务的任务名称
 LITE_OS_SEC_TEXT CHAR *OsCurTaskNameGet(VOID)
 {
     LosTaskCB *runTask = OsCurrTaskGet();
@@ -428,12 +429,12 @@ LITE_OS_SEC_TEXT_MINOR VOID LOS_LowpowerHookReg(LOWPOWERIDLEHOOK hook)
     g_lowPowerHook = hook;
 }
 #endif
-
+//注册空闲任务钩子函数，即在系统空闲时执行的函数
 LITE_OS_SEC_TEXT_MINOR VOID LOS_IdleHandlerHookReg(IDLEHANDLERHOOK hook)
 {
     g_idleHandlerHook = hook;
 }
-
+//检查任务是否分离（detached）
 STATIC BOOL OsTaskDeleteCheckDetached(const LosTaskCB *taskCB)
 {
 #if LOSCFG_COMPAT_POSIX
@@ -442,7 +443,7 @@ STATIC BOOL OsTaskDeleteCheckDetached(const LosTaskCB *taskCB)
     return TRUE;
 #endif
 }
-
+//删除已分离的任务
 STATIC VOID OsTaskDeleteDetached(const LosTaskCB *taskCB)
 {
     UINT32 intSave;
@@ -451,7 +452,7 @@ STATIC VOID OsTaskDeleteDetached(const LosTaskCB *taskCB)
     LOS_IntRestore(intSave);
     (VOID)LOS_TaskDelete(taskCB->taskId);
 }
-
+//删除已加入的任务
 STATIC VOID OsTaskDeleteJoined(LosTaskCB *taskCB, VOID *ret)
 {
 #ifdef LOSCFG_COMPAT_POSIX
@@ -481,6 +482,8 @@ STATIC VOID OsTaskDeleteJoined(LosTaskCB *taskCB, VOID *ret)
  * Description : All task entry
  * Input       : taskId     --- The ID of the task to be run
  */
+//执行任务的实际代码，并根据任务的属性判断是否需要删除任务
+//如果任务是分离的，则直接删除任务；如果任务是加入的，则将任务加入的其他任务唤醒，并重新调度任务
 LITE_OS_SEC_TEXT_INIT VOID OsTaskEntry(UINT32 taskId)
 {
     LosTaskCB *taskCB = NULL;
@@ -511,7 +514,7 @@ LITE_OS_SEC_TEXT_INIT VOID OsTaskEntry(UINT32 taskId)
         OsTaskDeleteJoined(taskCB, ret);
     }
 }
-
+//对任务初始化参数进行检查，确保任务参数的合法性
 STATIC UINT32 OsTaskInitParamCheck(const TSK_INIT_PARAM_S *initParam)
 {
     if (initParam == NULL) {
@@ -566,7 +569,7 @@ STATIC UINT32 OsTaskCreateParamCheckStatic(const UINT32 *taskId,
     return LOS_OK;
 }
 #endif
-
+//对任务创建参数进行检查，确保参数的合法性。如果参数不合法，则返回相应的错误码；否则返回成功
 LITE_OS_SEC_TEXT_INIT STATIC UINT32 OsTaskCreateParamCheck(const UINT32 *taskId,
     TSK_INIT_PARAM_S *initParam, VOID **pool)
 {
@@ -776,6 +779,7 @@ LITE_OS_SEC_TEXT_INIT STATIC BOOL OsTaskDelAction(LosTaskCB *taskCB, BOOL useUsr
  * 3. Do the deletion in hard-irq
  * then LOS_TaskDelete will directly return with 'ret' value.
  */
+//OsTaskDeleteCheckOnRun函数用来检查是否需要在任务运行时进行删除操作
 LITE_OS_SEC_TEXT_INIT STATIC BOOL OsTaskDeleteCheckOnRun(LosTaskCB *taskCB, UINT32 *ret)
 {
     /* init default out return value */
@@ -813,7 +817,7 @@ LITE_OS_SEC_TEXT_INIT STATIC BOOL OsTaskDeleteCheckOnRun(LosTaskCB *taskCB, UINT
 
     return TRUE;
 }
-
+//OsTaskCBInit函数用于初始化任务控制块，设置任务的各种属性和状态
 LITE_OS_SEC_TEXT_INIT STATIC VOID OsTaskCBInit(LosTaskCB *taskCB, const TSK_INIT_PARAM_S *initParam,
                                                VOID *stackPtr, const VOID *topStack, BOOL useUsrStack)
 {
@@ -869,7 +873,7 @@ LITE_OS_SEC_TEXT_INIT STATIC VOID OsTaskCBInit(LosTaskCB *taskCB, const TSK_INIT
     (VOID)memset_s(&taskCB->schedStat, sizeof(SchedStat), 0, sizeof(SchedStat));
 #endif
 }
-
+//OsTaskGetFreeTaskCB函数用于获取一个空闲的任务控制块
 STATIC UINT32 OsTaskGetFreeTaskCB(LosTaskCB **taskCB)
 {
     if (LOS_ListEmpty(&g_losFreeTask)) {
@@ -883,7 +887,7 @@ STATIC UINT32 OsTaskGetFreeTaskCB(LosTaskCB **taskCB)
     LOS_ListDelete(LOS_DL_LIST_FIRST(&g_losFreeTask));
     return LOS_OK;
 }
-
+//OsTaskCreateOnly函数用于创建一个新的任务，其中会对参数进行合法性检查
 STATIC UINT32 OsTaskCreateOnly(UINT32 *taskId, TSK_INIT_PARAM_S *initParam, VOID *topStack, BOOL useUsrStack)
 {
     UINT32 intSave, errRet;
@@ -947,7 +951,7 @@ LOS_ERREND:
     SCHEDULER_UNLOCK(intSave);
     return errRet;
 }
-
+//OsTaskResume函数用于恢复一个被挂起的任务
 STATIC VOID OsTaskResume(const UINT32 *taskId)
 {
     UINT32 intSave;
@@ -998,7 +1002,8 @@ LITE_OS_SEC_TEXT_INIT UINT32 LOS_TaskCreateOnly(UINT32 *taskId, TSK_INIT_PARAM_S
 {
     return OsTaskCreateOnly(taskId, initParam, NULL, FALSE);
 }
-
+//LOS_TaskCreate该函数用于创建一个新的任务，包括任务的名称、优先级、栈大小等参数的设置
+//在创建任务时，需要进行一些参数的合法性检查，例如是否超出最大任务数量、是否有足够的堆栈空间等
 LITE_OS_SEC_TEXT_INIT UINT32 LOS_TaskCreate(UINT32 *taskId, TSK_INIT_PARAM_S *initParam)
 {
     UINT32 ret;
@@ -1012,7 +1017,8 @@ LITE_OS_SEC_TEXT_INIT UINT32 LOS_TaskCreate(UINT32 *taskId, TSK_INIT_PARAM_S *in
 
     return LOS_OK;
 }
-
+//LOS_TaskDelete用于删除一个已经存在的任务
+//在删除任务时，需要对任务的状态进行判断。如果任务正在运行，则将其标记为删除状态并放入回收列表；否则直接释放任务占用的资源
 LITE_OS_SEC_TEXT_INIT UINT32 LOS_TaskDelete(UINT32 taskId)
 {
     LosTaskCB *taskCB = NULL;
@@ -1072,7 +1078,7 @@ LOS_RETURN:
     SCHEDULER_UNLOCK(intSave);
     return errRet;
 }
-
+//LOS_TaskResume函数用于恢复一个挂起的任务
 LITE_OS_SEC_TEXT_INIT UINT32 LOS_TaskResume(UINT32 taskId)
 {
     UINT32 intSave;
@@ -1136,6 +1142,7 @@ LOS_ERREND:
  * 3. Do the suspension in hard-irq
  * then LOS_TaskSuspend will directly return with 'ret' value.
  */
+//OsTaskSuspendCheckOnRun：检查当前任务是否需要挂起的函数，根据条件判断是否需要进行任务挂起操作
 LITE_OS_SEC_TEXT_INIT STATIC BOOL OsTaskSuspendCheckOnRun(LosTaskCB *taskCB, UINT32 *ret)
 {
     /* init default out return value */
@@ -1164,7 +1171,8 @@ LITE_OS_SEC_TEXT_INIT STATIC BOOL OsTaskSuspendCheckOnRun(LosTaskCB *taskCB, UIN
 
     return TRUE;
 }
-
+//LOS_TaskSuspend：挂起指定任务的函数
+//如果任务已经处于挂起状态或者正在运行，并且不满足挂起条件，则直接返回错误码；否则执行挂起操作
 LITE_OS_SEC_TEXT_INIT UINT32 LOS_TaskSuspend(UINT32 taskId)
 {
     UINT32 intSave;
@@ -1218,7 +1226,7 @@ LOS_RETURN:
     SCHEDULER_UNLOCK(intSave);
     return errRet;
 }
-
+//LOS_TaskDelay该函数用于让任务进入延时状态，在指定的时间后重新被调度执行
 LITE_OS_SEC_TEXT UINT32 LOS_TaskDelay(UINT32 tick)
 {
     UINT32 intSave;
@@ -1250,7 +1258,7 @@ LITE_OS_SEC_TEXT UINT32 LOS_TaskDelay(UINT32 tick)
 
     return LOS_OK;
 }
-
+//LOS_TaskDelay：将任务进入延时状态，在指定的时间后重新被调度执行，如果当前在中断中或者不可抢占，则返回相应的错误码
 LITE_OS_SEC_TEXT_MINOR UINT16 LOS_TaskPriGet(UINT32 taskId)
 {
     UINT32 intSave;
@@ -1273,7 +1281,7 @@ LITE_OS_SEC_TEXT_MINOR UINT16 LOS_TaskPriGet(UINT32 taskId)
     SCHEDULER_UNLOCK(intSave);
     return priority;
 }
-
+//LOS_TaskPriGet：获取指定任务的优先级
 LITE_OS_SEC_TEXT_MINOR UINT32 LOS_TaskPriSet(UINT32 taskId, UINT16 taskPrio)
 {
     BOOL isReady = FALSE;
@@ -1325,7 +1333,7 @@ LITE_OS_SEC_TEXT_MINOR UINT32 LOS_TaskPriSet(UINT32 taskId, UINT16 taskPrio)
     }
     return LOS_OK;
 }
-
+//LOS_TaskPriSet：设置指定任务的优先级，根据任务当前状态选择不同的处理方式
 LITE_OS_SEC_TEXT_MINOR UINT32 LOS_CurTaskPriSet(UINT16 taskPrio)
 {
     return LOS_TaskPriSet(OsCurrTaskGet()->taskId, taskPrio);
@@ -1337,6 +1345,7 @@ LITE_OS_SEC_TEXT_MINOR UINT32 LOS_CurTaskPriSet(UINT16 taskPrio)
  *               taskStatus --- task status
  *               timeOut    ---  Expiry time
  * Return      : LOS_OK on success or LOS_NOK on failure
+ * OsTaskWait和OsTaskWake：任务等待和唤醒的辅助函数
  */
 VOID OsTaskWait(LOS_DL_LIST *list, UINT16 taskStatus, UINT32 timeout)
 {
@@ -1373,7 +1382,7 @@ VOID OsTaskWake(LosTaskCB *resumedTask, UINT16 taskStatus)
         OsPriQueueEnqueue(&resumedTask->pendList, resumedTask->priority);
     }
 }
-
+//LOS_TaskYield用于使当前任务主动放弃 CPU 控制权，让出 CPU 给其他高优先级任务执行
 LITE_OS_SEC_TEXT_MINOR UINT32 LOS_TaskYield(VOID)
 {
     UINT32 tskCount;
@@ -1412,6 +1421,8 @@ LITE_OS_SEC_TEXT_MINOR UINT32 LOS_TaskYield(VOID)
     return LOS_OK;
 }
 
+//LOS_TaskLock和LOS_TaskUnlock：任务锁定和解锁函数，用于保护临界区
+
 LITE_OS_SEC_TEXT_MINOR VOID LOS_TaskLock(VOID)
 {
     UINT32 intSave;
@@ -1446,7 +1457,7 @@ LITE_OS_SEC_TEXT_MINOR VOID LOS_TaskUnlock(VOID)
 
     LOS_IntRestore(intSave);
 }
-
+//LOS_TaskInfoGet：获取指定任务的信息，包括任务名、栈大小、堆栈使用情况等
 LITE_OS_SEC_TEXT_MINOR UINT32 LOS_TaskInfoGet(UINT32 taskId, TSK_INFO_S *taskInfo)
 {
     UINT32 intSave;
@@ -1503,7 +1514,7 @@ LITE_OS_SEC_TEXT_MINOR UINT32 LOS_TaskInfoGet(UINT32 taskId, TSK_INFO_S *taskInf
 
     return LOS_OK;
 }
-
+//LOS_TaskCpuAffiSet和LOS_TaskCpuAffiGet：设置和获取任务的 CPU 亲和性，仅在支持多核的情况下有效
 LITE_OS_SEC_TEXT_MINOR UINT32 LOS_TaskCpuAffiSet(UINT32 taskId, UINT16 cpuAffiMask)
 {
 #ifdef LOSCFG_KERNEL_SMP
@@ -1580,6 +1591,7 @@ LITE_OS_SEC_TEXT_MINOR UINT16 LOS_TaskCpuAffiGet(UINT32 taskId)
 
 /*
  * Description : Process pending signals tagged by others cores
+ *OsTaskProcSignal：处理挂起、删除任务等信号
  */
 LITE_OS_SEC_TEXT_MINOR UINT32 OsTaskProcSignal(VOID)
 {