Re: [ECOS] therad delay problem

[Gary Thomas <gary at mlbassoc dot com>]

On Tue, 2003-11-25 at 01:30, Andrew Lunn wrote:
> On Tue, Nov 25, 2003 at 10:59:06AM +0530, Aravind B wrote:
> > hi,
> > 	i have written a program which contains  3 thread as  shown.
> > 
> > cyg_user_start(void)
> > {
> > 
> > printf("entering two threads cyg_user_start() function\n");
> > 
> > cyg_mutex_init(&cliblock);
> > 	cyg_thread_create(3,simple_program,(cyg_addrword_t)2,
> > 	"simple_program_Thread ",(void*) stack[2],4096,
> > 	 &simple_program_Thread,&thread_s[2]);
> > 	cyg_thread_create(4,simple_program1,(cyg_addrword_t)3,
> > 	"simple_program1_Thread",(void*) stack[3],4096,
> > 	 &simple_program1_Thread,&thread_s[3]);
> > 	 cyg_thread_create(5,simple_program2,(cyg_addrword_t)4,
> > 	"simple_program2_Thread",(void*) stack[4],4096,
> > 	 &simple_program2_Thread,&thread_s[4]);
> > 
> > cyg_thread_resume(simple_program_Thread);
> > cyg_thread_resume(simple_program1_Thread);
> > cyg_thread_resume(simple_program2_Thread);
> > }
> > cyg_alarm_t alarm_Tbcn_func;
> > 
> > void simple_program(cyg_addrword_t data )
> > {
> > 	int message=(int) data;
> > 	unsigned int i;
> > 	printf("i am thread %d before delay\n",message);
> > 
> > 	curr_time=cyg_real_time_clock();
> > 	cyg_clock_to_counter(curr_time,&handle_counterTbcn);
> >         cyg_alarm_create(handle_counterTbcn, alarm_Tbcn_func,5500,
> >                 	&handle_alarmTbcn, &alarm_Tbcn);
> > 	cyg_alarm_initialize(handle_alarmTbcn,cyg_current_time()+200,0);
> > 
> > 		cyg_thread_delay(3);
> > 		while(1)
> > 		{
> > 			if(var==1)
> > 			{
> > 				printf(" hello");
> > 				break;
> > 			}
> > 		}
> > }
> > 
> > void  simple_program1(cyg_addrword_t data )
> > {
> > 	int message=(int) data;
> > 	printf("i am thread %d\n",message);
> > }
> > 
> > void  simple_program2(cyg_addrword_t data )
> > {
> > 	int message=(int) data;
> > 	printf("i am thread %d\n",message);
> > 	while(1)
> > 	{
> > 	}
> > }
> >  void alarm_Tbcn_func( cyg_handle_t alarmTbcn,cyg_addrword_t data)
> > {
> > 	var=1;
> > 	printf(" i am  in alarm function\n");
> > }
> > 
> > 
> > there is cyg_thread _delay(3) in t1.the control goes to t2 and then
> > t3.In t3 i have infinite while loop.The control is not going to t1.Is
> > there any way so that i can signal to t1 that thread delay is over and
> > it can continue its flow.If so then how it is? 
> 
> Does the alarm hander get called?
> 
> it var a volatile?

Does your program include <cyg/kernel/kapi.h>
See: http://ecos.sourceware.org/fom-serv/ecos/cache/94.html

-- 
Gary Thomas <gary@mlbassoc.com>
MLB Associates


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