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Re: therad delay problem
- From: Gary Thomas <gary at mlbassoc dot com>
- To: Andrew Lunn <andrew at lunn dot ch>
- Cc: Aravind B <arvindb at cranessoftware dot com>,ecos-discuss at sources dot redhat dot com
- Date: 25 Nov 2003 05:58:31 -0700
- Subject: Re: [ECOS] therad delay problem
- Organization: MLB Associates
- References: <1069738146.1002.23.camel@ambica> <20031125083030.GC21161@lunn.ch>
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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