pkarashchenko commented on code in PR #1711: URL: https://github.com/apache/nuttx-apps/pull/1711#discussion_r1170528717
########## testing/ostest/schedlock.c: ########## @@ -0,0 +1,259 @@ +/**************************************************************************** + * apps/testing/ostest/schedlock.c + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. The + * ASF licenses this file to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance with the + * License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT + * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the + * License for the specific language governing permissions and limitations + * under the License. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <stdio.h> +#include <unistd.h> +#include <pthread.h> +#include <errno.h> +#include <sched.h> +#include <unistd.h> +#include <stdint.h> + +#ifdef CONFIG_ARCH_SIM +# include <nuttx/arch.h> +#endif + +#include <sys/wait.h> + +#include "ostest.h" + +static pthread_t g_lowpri; +static pthread_t g_highpri; +static volatile bool g_locked; +static volatile bool g_pass; + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: highpri_thread + ****************************************************************************/ + +static FAR void *highpri_thread(FAR void *parameter) +{ + struct sched_param param; + int policy; + bool self = (bool)(uintptr_t)parameter; + pthread_t thread = self ? 0 : g_lowpri; + + usleep(100); + + pthread_getschedparam(0, &policy, ¶m); + if (self) + { + param.sched_priority -= 2; + } + else + { + param.sched_priority += 2; + } + + sched_lock(); + + g_locked = true; + + pthread_setschedprio(thread, param.sched_priority); + + /* Test pass if g_locked was not cleared by lowpri thread while scheduler + * is locked + */ + + g_pass = g_locked; + + sched_unlock(); + + return NULL; +} + +/**************************************************************************** + * Name: lowpri_thread + ****************************************************************************/ + +static FAR void *lowpri_thread(FAR void *parameter) +{ + /* Wait until highpri thread starts the scheduler lock test */ + + while (!g_locked) + { +#ifdef CONFIG_ARCH_SIM + /* The simulator doesn't have any mechanism to do asynchronous + * pre-emption (basically because it doesn't have any + * interrupts/asynchronous events). The simulator does "fake" a timer + * interrupt in up_idle() -- the idle thread that only executes when + * nothing else is running. In the simulator, we cannot suspend the + * middle priority task, or we wouldn't have the test that we want. + * So, we have no option but to pump the fake clock here by calling + * up_idle(). Sigh! + */ + + up_idle(); Review Comment: Reposted here https://github.com/apache/nuttx-apps/issues/1716 -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@nuttx.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
