mirror of
https://github.com/zephyrproject-rtos/zephyr
synced 2025-08-16 04:26:22 +00:00
ac74d8b652
Replace the existing Apache 2.0 boilerplate header with an SPDX tag throughout the zephyr code tree. This patch was generated via a script run over the master branch. Also updated doc/porting/application.rst that had a dependency on line numbers in a literal include. Manually updated subsys/logging/sys_log.c that had a malformed header in the original file. Also cleanup several cases that already had a SPDX tag and we either got a duplicate or missed updating. Jira: ZEP-1457 Change-Id: I6131a1d4ee0e58f5b938300c2d2fc77d2e69572c Signed-off-by: David B. Kinder <david.b.kinder@intel.com> Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
90 lines
2.2 KiB
C
90 lines
2.2 KiB
C
/* main.c - Hello World demo */
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/*
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* Copyright (c) 2012-2014 Wind River Systems, Inc.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr.h>
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#include <misc/printk.h>
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/*
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* The hello world demo has two threads that utilize semaphores and sleeping
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* to take turns printing a greeting message at a controlled rate. The demo
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* shows both the static and dynamic approaches for spawning a thread; a real
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* world application would likely use the static approach for both threads.
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*/
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/* size of stack area used by each thread */
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#define STACKSIZE 1024
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/* scheduling priority used by each thread */
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#define PRIORITY 7
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/* delay between greetings (in ms) */
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#define SLEEPTIME 500
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/*
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* @param my_name thread identification string
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* @param my_sem thread's own semaphore
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* @param other_sem other thread's semaphore
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*/
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void helloLoop(const char *my_name,
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struct k_sem *my_sem, struct k_sem *other_sem)
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{
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while (1) {
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/* take my semaphore */
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k_sem_take(my_sem, K_FOREVER);
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/* say "hello" */
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printk("%s: Hello World from %s!\n", my_name, CONFIG_ARCH);
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/* wait a while, then let other thread have a turn */
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k_sleep(SLEEPTIME);
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k_sem_give(other_sem);
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}
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}
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/* define semaphores */
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K_SEM_DEFINE(threadA_sem, 1, 1); /* starts off "available" */
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K_SEM_DEFINE(threadB_sem, 0, 1); /* starts off "not available" */
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/* threadB is a dynamic thread that is spawned by threadA */
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void threadB(void *dummy1, void *dummy2, void *dummy3)
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{
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ARG_UNUSED(dummy1);
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ARG_UNUSED(dummy2);
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ARG_UNUSED(dummy3);
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/* invoke routine to ping-pong hello messages with threadA */
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helloLoop(__func__, &threadB_sem, &threadA_sem);
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}
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char __noinit __stack threadB_stack_area[STACKSIZE];
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/* threadA is a static thread that is spawned automatically */
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void threadA(void *dummy1, void *dummy2, void *dummy3)
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{
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ARG_UNUSED(dummy1);
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ARG_UNUSED(dummy2);
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ARG_UNUSED(dummy3);
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/* spawn threadB */
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k_thread_spawn(threadB_stack_area, STACKSIZE, threadB, NULL, NULL, NULL,
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PRIORITY, 0, K_NO_WAIT);
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/* invoke routine to ping-pong hello messages with threadB */
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helloLoop(__func__, &threadA_sem, &threadB_sem);
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}
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K_THREAD_DEFINE(threadA_id, STACKSIZE, threadA, NULL, NULL, NULL,
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PRIORITY, 0, K_NO_WAIT);
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