mirror of
https://github.com/DragonOS-Community/DragonOS.git
synced 2025-06-09 07:06:47 +00:00
62 lines
1.5 KiB
C
62 lines
1.5 KiB
C
#include "sleep.h"
|
||
#include <common/errno.h>
|
||
#include <time/timer.h>
|
||
#include <process/process.h>
|
||
#include <sched/sched.h>
|
||
#include <mm/slab.h>
|
||
/**
|
||
* @brief nanosleep定时事件到期后，唤醒指定的进程
|
||
*
|
||
* @param pcb 待唤醒的进程的pcb
|
||
*/
|
||
void nanosleep_handler(void *pcb)
|
||
{
|
||
process_wakeup((struct process_control_block *)pcb);
|
||
}
|
||
|
||
/**
|
||
* @brief 休眠指定时间
|
||
*
|
||
* @param rqtp 指定休眠的时间
|
||
* @param rmtp 返回的剩余休眠时间
|
||
* @return int
|
||
*/
|
||
int nanosleep(const struct timespec *rqtp, struct timespec *rmtp)
|
||
{
|
||
int64_t total_ns = rqtp->tv_nsec;
|
||
// kdebug("totalns = %ld", total_ns);
|
||
if (total_ns < 0 || total_ns >= 1000000000)
|
||
return -EINVAL;
|
||
|
||
// todo: 对于小于500us的时间，使用spin/rdtsc来进行定时
|
||
if (total_ns < 50000)
|
||
return 0;
|
||
|
||
if (total_ns < 500000)
|
||
total_ns = 500000;
|
||
|
||
// 增加定时任务
|
||
struct timer_func_list_t *sleep_task = (struct timer_func_list_t *)kmalloc(sizeof(struct timer_func_list_t), 0);
|
||
memset(sleep_task, 0, sizeof(struct timer_func_list_t));
|
||
|
||
|
||
|
||
|
||
timer_func_init_us(sleep_task, &nanosleep_handler, (void *)current_pcb, total_ns / 1000);
|
||
|
||
timer_func_add(sleep_task);
|
||
|
||
current_pcb->state = PROC_INTERRUPTIBLE;
|
||
current_pcb->flags |= PF_NEED_SCHED;
|
||
sched_cfs();
|
||
|
||
// todo: 增加信号唤醒的功能后，设置rmtp
|
||
|
||
if (rmtp != NULL)
|
||
{
|
||
rmtp->tv_nsec = 0;
|
||
rmtp->tv_sec = 0;
|
||
}
|
||
|
||
return 0;
|
||
} |