嵌入式 解决线程使用sleep或usleep等函数导致整个进程睡眠的问题

/*
author : kj
time : 2013-12-06 21:36
instruction:
get the num of the current seconds

*/

int get_current_time_second(void)
{
struct tm *tmnow;
struct timeval tv;
gettimeofday(&tv,NULL);
tmnow = localtime(&tv.tv_sec);
return tv.tv_sec;
}

/*
author : kj
time : 2013-12-06 21:42
function :
done the function of time interval in separate thread

*/
int pthread_count_second(int time_interval)
{
int current_seconds = 0;
int execl_seconds = 0;
int set_time_interval = time_interval;
current_seconds = get_current_time_second();
execl_seconds = current_seconds + set_time_interval;

while(1)
{
current_seconds = get_current_time_second();
if((execl_seconds - current_seconds) == 0)
{
break;
}
}

return 0;
}

/*
author : kj
time : 2013-12-01
instrucion:
glitter :
0 - direct set to board
1 - speed slow
2 - speed quickly
*/
int set_led_status(char *led_status,int glitter_type)
{
//int i_temp = 0;//the times need global variable
char set_led_status_buf[4] = {0};
joseph_ipnc_param.joseph_ipnc_network_attr.joseph_ipnc_led_glitter_close = read_user_file("joseph_ipnc_led_glitter_close");
if(glitter_type == 0)
{
strcpy(set_led_status_buf,led_status);
set_status_to_board(set_led_status_buf);
}
if(glitter_type == 1)
{
strcpy(set_led_status_buf,led_status);
while(joseph_ipnc_param.joseph_ipnc_network_attr.joseph_ipnc_led_glitter_close == 1)
{
set_status_to_board(set_led_status_buf);
pthread_count_second(2);
set_status_to_board("00");//close the led
pthread_count_second(2);
joseph_ipnc_param.joseph_ipnc_network_attr.joseph_ipnc_led_glitter_close = read_user_file("joseph_ipnc_led_glitter_close");
//i_temp++;
}
//i_temp = 0;
}

if(glitter_type == 2)
{
strcpy(set_led_status_buf,led_status);
while(joseph_ipnc_param.joseph_ipnc_network_attr.joseph_ipnc_led_glitter_close == 1)
{
set_status_to_board(set_led_status_buf);
pthread_count_second(1);
set_status_to_board("00");//close the led
pthread_count_second(1);
//i_temp++;
joseph_ipnc_param.joseph_ipnc_network_attr.joseph_ipnc_led_glitter_close = read_user_file("joseph_ipnc_led_glitter_close");
}
//i_temp = 0;
}

set_status_to_board(set_led_status_buf);
alter_ipnc_param("joseph_ipnc_led_glitter_close","0");
return 0;
}