删除 los_sched.c

kernel/base/sched/sched_sq/los_sched.c

-/*
- * Copyright (c) 2013-2019, Huawei Technologies Co., Ltd. All rights reserved.
- * Copyright (c) 2020, Huawei Device Co., Ltd. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without modification,
- * are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice, this list of
- *    conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice, this list
- *    of conditions and the following disclaimer in the documentation and/or other materials
- *    provided with the distribution.
- *
- * 3. Neither the name of the copyright holder nor the names of its contributors may be used
- *    to endorse or promote products derived from this software without specific prior written
- *    permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
- * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
- * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "los_base.h"
-#include "los_task_pri.h"
-#include "los_percpu_pri.h"
-#include "los_hw_pri.h"
-#include "los_arch_mmu.h"
-#include "los_process_pri.h"
-#ifdef LOSCFG_KERNEL_CPUP
-#include "los_cpup_pri.h"
-#endif
-
-#ifdef __cplusplus
-#if __cplusplus
-extern "C" {
-#endif /* __cplusplus */
-#endif /* __cplusplus */
-
-STATIC VOID OsSchedSwitchProcess(LosProcessCB *runProcess, LosProcessCB *newProcess)
-{
-    if (runProcess == newProcess) {
-        return;
-    }
-
-#if (LOSCFG_KERNEL_SMP == YES)
-    runProcess->processStatus = OS_PROCESS_RUNTASK_COUNT_DEC(runProcess->processStatus);
-    newProcess->processStatus = OS_PROCESS_RUNTASK_COUNT_ADD(newProcess->processStatus);
-
-    LOS_ASSERT(!(OS_PROCESS_GET_RUNTASK_COUNT(newProcess->processStatus) > LOSCFG_KERNEL_CORE_NUM));
-    if (OS_PROCESS_GET_RUNTASK_COUNT(runProcess->processStatus) == 0) {
-#endif
-        runProcess->processStatus &= ~OS_PROCESS_STATUS_RUNNING;
-        if ((runProcess->threadNumber > 1) && !(runProcess->processStatus & OS_PROCESS_STATUS_READY)) {
-            runProcess->processStatus |= OS_PROCESS_STATUS_PEND;
-        }
-#if (LOSCFG_KERNEL_SMP == YES)
-    }
-#endif
-    LOS_ASSERT(!(newProcess->processStatus & OS_PROCESS_STATUS_PEND));
-    newProcess->processStatus |= OS_PROCESS_STATUS_RUNNING;
-
-    if (OsProcessIsUserMode(newProcess)) {
-        LOS_ArchMmuContextSwitch(&newProcess->vmSpace->archMmu);
-    }
-
-#ifdef LOSCFG_KERNEL_CPUP
-    OsProcessCycleEndStart(newProcess->processID, OS_PROCESS_GET_RUNTASK_COUNT(runProcess->processStatus) + 1);
-#endif /* LOSCFG_KERNEL_CPUP */
-
-    OsCurrProcessSet(newProcess);
-
-    if ((newProcess->timeSlice == 0) && (newProcess->policy == LOS_SCHED_RR)) {
-        newProcess->timeSlice = OS_PROCESS_SCHED_RR_INTERVAL;
-    }
-}
-
-VOID OsSchedResched(VOID)
-{
-    LosTaskCB *runTask = NULL;
-    LosTaskCB *newTask = NULL;
-    LosProcessCB *runProcess = NULL;
-    LosProcessCB *newProcess = NULL;
-
-    LOS_ASSERT(LOS_SpinHeld(&g_taskSpin));
-
-    if (!OsPreemptableInSched()) {
-        return;
-    }
-
-    runTask = OsCurrTaskGet();
-    newTask = OsGetTopTask();
-
-    /* always be able to get one task */
-    LOS_ASSERT(newTask != NULL);
-
-    if (runTask == newTask) {
-        return;
-    }
-
-    runTask->taskStatus &= ~OS_TASK_STATUS_RUNNING;
-    newTask->taskStatus |= OS_TASK_STATUS_RUNNING;
-
-    runProcess = OS_PCB_FROM_PID(runTask->processID);
-    newProcess = OS_PCB_FROM_PID(newTask->processID);
-
-    OsSchedSwitchProcess(runProcess, newProcess);
-
-#if (LOSCFG_KERNEL_SMP == YES)
-    /* mask new running task's owner processor */
-    runTask->currCpu = OS_TASK_INVALID_CPUID;
-    newTask->currCpu = ArchCurrCpuid();
-#endif
-
-    (VOID)OsTaskSwitchCheck(runTask, newTask);
-
-#if (LOSCFG_KERNEL_SCHED_STATISTICS == YES)
-    OsSchedStatistics(runTask, newTask);
-#endif
-
-    if ((newTask->timeSlice == 0) && (newTask->policy == LOS_SCHED_RR)) {
-        newTask->timeSlice = LOSCFG_BASE_CORE_TIMESLICE_TIMEOUT;
-    }
-
-    OsCurrTaskSet((VOID*)newTask);
-
-    if (OsProcessIsUserMode(newProcess)) {
-        OsCurrUserTaskSet(newTask->userArea);
-    }
-
-    PRINT_TRACE("cpu%d run process name: (%s) pid: %d status: %x threadMap: %x task name: (%s) tid: %d status: %x ->\n"
-                "     new process name: (%s) pid: %d status: %x threadMap: %x task name: (%s) tid: %d status: %x!\n",
-                ArchCurrCpuid(),
-                runProcess->processName, runProcess->processID, runProcess->processStatus,
-                runProcess->threadScheduleMap, runTask->taskName,  runTask->taskID, runTask->taskStatus,
-                newProcess->processName, newProcess->processID, newProcess->processStatus,
-                newProcess->threadScheduleMap, newTask->taskName, newTask->taskID, newTask->taskStatus);
-
-    /* do the task context switch */
-    OsTaskSchedule(newTask, runTask);
-}
-
-VOID OsSchedPreempt(VOID)
-{
-    LosTaskCB *runTask = NULL;
-    UINT32 intSave;
-
-    if (!OsPreemptable()) {
-        return;
-    }
-
-    SCHEDULER_LOCK(intSave);
-
-    /* add run task back to ready queue */
-    runTask = OsCurrTaskGet();
-    OS_TASK_SCHED_QUEUE_ENQUEUE(runTask, 0);
-
-    /* reschedule to new thread */
-    OsSchedResched();
-
-    SCHEDULER_UNLOCK(intSave);
-}
-
-#ifdef __cplusplus
-#if __cplusplus
-}
-#endif /* __cplusplus */
-#endif /* __cplusplus */