/*
  Copyright (c), 2001-2022, Shenshu Tech. Co., Ltd.
 */

#include "ot_osal.h"
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/printk.h>
#include <linux/kthread.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include "securec.h"

osal_task_t *osal_kthread_create(threadfn_t thread, void *data, const char *name)
{
    struct task_struct *k = NULL;
    osal_task_t *p = (osal_task_t *)kmalloc(sizeof(osal_task_t), GFP_KERNEL);
    if (p == NULL) {
        osal_trace("%s - kmalloc error!\n", __FUNCTION__);
        return NULL;
    }
    (void)memset_s(p, sizeof(osal_task_t), 0, sizeof(osal_task_t));

    k = kthread_run(thread, data, name);
    if (IS_ERR(k)) {
        osal_trace("%s - kthread create error!\n", __FUNCTION__);
        kfree(p);
        p = NULL;
        return NULL;
    }
    p->task_struct = k;
    return p;
}
EXPORT_SYMBOL(osal_kthread_create);

void osal_kthread_destroy(osal_task_t *task, unsigned int stop_flag)
{
    if (task == NULL) {
        osal_trace("%s - parameter invalid!\n", __FUNCTION__);
        return;
    }
    /* note: When you call the Kthread_stop function, the thread function cannot be finished, otherwise it will oops. */
    if ((stop_flag != 0) && (task->task_struct != NULL)) {
        kthread_stop((struct task_struct *)(task->task_struct));
    }
    task->task_struct = NULL;
    kfree(task);
}
EXPORT_SYMBOL(osal_kthread_destroy);

int osal_kthread_should_stop(void)
{
    return kthread_should_stop();
}
EXPORT_SYMBOL(osal_kthread_should_stop);

int osal_tasklet_init(osal_tasklet_t *tasklet, void (*func)(unsigned long), unsigned long data)
{
    struct tasklet_struct *p = NULL;
    if (tasklet == NULL) {
        osal_trace("%s - parameter invalid!\n", __FUNCTION__);
        return -1;
    }
    p = (struct tasklet_struct *)kmalloc(sizeof(struct tasklet_struct), GFP_KERNEL);
    if (p == NULL) {
        osal_trace("%s - kmalloc error!\n", __FUNCTION__);
        return -1;
    }
    tasklet_init(p, func, data);
    tasklet->tasklet_struct = p;
    return 0;
}
EXPORT_SYMBOL(osal_tasklet_init);

void osal_tasklet_kill(osal_tasklet_t *tasklet)
{
    struct tasklet_struct *p = NULL;
    if ((tasklet == NULL) || (tasklet->tasklet_struct == NULL)) {
        osal_trace("%s - parameter invalid!\n", __FUNCTION__);
        return;
    }
    p = (struct tasklet_struct *)(tasklet->tasklet_struct);
    tasklet_kill(p);
    kfree(p);
    tasklet->tasklet_struct = NULL;
}
EXPORT_SYMBOL(osal_tasklet_kill);

void osal_tasklet_schedule(const osal_tasklet_t *tasklet)
{
    struct tasklet_struct *p = NULL;
    if ((tasklet == NULL) || (tasklet->tasklet_struct == NULL)) {
        osal_trace("%s - parameter invalid!\n", __FUNCTION__);
        return;
    }
    p = (struct tasklet_struct *)tasklet->tasklet_struct;
    tasklet_schedule(p);
}
EXPORT_SYMBOL(osal_tasklet_schedule);

int osal_get_current_tgid(void)
{
    return get_current()->tgid;
}
EXPORT_SYMBOL(osal_get_current_tgid);

int osal_get_current_pid(void)
{
    return get_current()->pid;
}
EXPORT_SYMBOL(osal_get_current_pid);