多线程

项目编写

1. 在 applications/genkipi/app 下新建 thread 文件夹
2. 在thread 下新建 main.c 文件
3. 在thread 下新建 BUILD.gn文件

代码部分

main.c 文件内容

#include <stdio.h>
#include <string.h>
#include <unistd.h>

#include "ohos_init.h"
#include "cmsis_os2.h"

static void task_1(void) {
    int count = 0;
    while (1) {
        printf("task_1----%d\r\n", count++);
        usleep(0.5 * 1000 * 1000);
    }
}

static void task_2(void) {
    int count = 0;
    while (1) {
        printf("task_2----%d\r\n", count++);
        usleep(1 * 1000 * 1000);
    }
}

static void start(void) {
    osThreadAttr_t attr;

    attr.name = "thread_1";
    attr.attr_bits = 0U;
    attr.cb_mem = NULL;
    attr.cb_size = 0U;
    attr.stack_mem = NULL;
    attr.stack_size = 1024 * 4;
    attr.priority = 25;

    if (osThreadNew((osThreadFunc_t) task_1, NULL, &attr) == NULL) {
        printf("Falied to create task_1!\r\n");
    }

    attr.name = "thread_2";

    if (osThreadNew((osThreadFunc_t) task_2, NULL, &attr) == NULL) {
        printf("Falied to create task_2!\n\n");
    }
}

APP_FEATURE_INIT(start);

项目Build.gn

hello_world 目录下 BUILD.gn 内容为

static_library("thread") {
    sources = [
        "main.c"
    ]

    include_dirs = [
        "//utils/native/lite/include"
    ]
}

外部Build.gn

thread文件夹上一级目录下BUILD.gn内容为

import("//build/lite/config/component/lite_component.gni")

lite_component("app") {
    features = [
        "thread"
    ]
}