* RE: [ECOS] using struct
@ 2001-04-27 3:49 Nielsen Linus
0 siblings, 0 replies; 5+ messages in thread
From: Nielsen Linus @ 2001-04-27 3:49 UTC (permalink / raw)
To: ecos-discuss
...and if you read my last post, you will probably understand
that I have been too much into C++ lately.
The answer to you question is of course that in C, you cannot
leave out the keyword "struct" from your variable declaration.
You code should look like this:
struct hola_type {
int a;
};
struct hola_type hola;
hola.a = 5; // This is 54 line.
But still, this is a C question, not eCos.
/Linus
> Hi all.
>
> A simple question:
>
> Can I use struct in ecos?
>
> I tried to declare a struct inside a thread:
>
> static void stimulus( cyg_addrword_t data )
> {
> int i, j;
>
> struct hola{
> int a;
> };
>
> hola.a = 5; // This is 54 line.
> ..
> ..
> }
>
> }
>
> and i have the following error message:
> sync_mbox.c:54: `hola' undeclared (first use in this
> function)
>
> Thanks
>
> Best regards..
>
> Carlos Camargo
>
> __________________________________________________
> Do You Yahoo!?
> Yahoo! Auctions - buy the things you want at great prices
> http://auctions.yahoo.com/
>
^ permalink raw reply [flat|nested] 5+ messages in thread
* RE: [ECOS] using struct
@ 2001-04-27 3:31 Nielsen Linus
0 siblings, 0 replies; 5+ messages in thread
From: Nielsen Linus @ 2001-04-27 3:31 UTC (permalink / raw)
To: ecos-discuss
> A simple question:
>
> Can I use struct in ecos?
Yes.
> I tried to declare a struct inside a thread:
>
> static void stimulus( cyg_addrword_t data )
> {
> int i, j;
>
> struct hola{
> int a;
> };
>
> hola.a = 5; // This is 54 line.
> ..
> ..
> }
>
> }
>
> and i have the following error message:
> sync_mbox.c:54: `hola' undeclared (first use in this
> function)
This is a pure C issue. You have declared a struct, but you have not
delared an _instance_ of that struct. You should do it like this:
struct {
int a;
} hola;
hola.a = 5; // This is 54 line.
Notice the difference.
/Linus
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [ECOS] using struct
2001-04-27 2:51 Carlos Camargo
2001-04-27 3:18 ` Andrew Lunn
@ 2001-04-27 3:21 ` Martin van Veen
1 sibling, 0 replies; 5+ messages in thread
From: Martin van Veen @ 2001-04-27 3:21 UTC (permalink / raw)
To: Carlos Camargo; +Cc: ecos-discuss
Hi Carlos
--- Carlos Camargo <carlos_ivan_camargo@yahoo.com> wrote:
> Can I use struct in ecos?
Sure, why not...
> I tried to declare a struct inside a thread:
>
> static void stimulus( cyg_addrword_t data )
> {
> int i, j;
>
> struct hola{
> int a;
> };
>
> hola.a = 5; // This is 54 line.
> ..
> ..
> }
>
> }
>
> and i have the following error message:
> sync_mbox.c:54: `hola' undeclared (first use in this
> function)
You gave the struct a tag, but you didn't declare it. So therefore
the compiler complains (it has nothing to do with eCos). This will
do better, I guess:
struct
{
int a;
} hola;
Greetings,
Martin.
__________________________________________________
Do You Yahoo!?
Yahoo! Auctions - buy the things you want at great prices
http://auctions.yahoo.com/
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [ECOS] using struct
2001-04-27 2:51 Carlos Camargo
@ 2001-04-27 3:18 ` Andrew Lunn
2001-04-27 3:21 ` Martin van Veen
1 sibling, 0 replies; 5+ messages in thread
From: Andrew Lunn @ 2001-04-27 3:18 UTC (permalink / raw)
To: Carlos Camargo; +Cc: eCos Disuss
On Fri, Apr 27, 2001 at 02:51:42AM -0700, Carlos Camargo wrote:
> Can I use struct in ecos?
You can use all the standard C constructs.
> I tried to declare a struct inside a thread:
Your syntax is wrong for declaring a struct. In this case hola is the
name of the structure, not the name of the variable. You now need to
use the structure to declare the variable.
I would normally do something link...
struct hola_s {
int a;
};
struct hola_s hola;
This is a C question, not ecos, so you would be better asking
questions on a C mailing list.
Andrew
> static void stimulus( cyg_addrword_t data )
> {
> int i, j;
>
> struct hola{
> int a;
> };
>
> hola.a = 5; // This is 54 line.
> ..
> ..
> }
>
> }
^ permalink raw reply [flat|nested] 5+ messages in thread
* [ECOS] using struct
@ 2001-04-27 2:51 Carlos Camargo
2001-04-27 3:18 ` Andrew Lunn
2001-04-27 3:21 ` Martin van Veen
0 siblings, 2 replies; 5+ messages in thread
From: Carlos Camargo @ 2001-04-27 2:51 UTC (permalink / raw)
To: ecos-discuss
Hi all.
A simple question:
Can I use struct in ecos?
I tried to declare a struct inside a thread:
static void stimulus( cyg_addrword_t data )
{
int i, j;
struct hola{
int a;
};
hola.a = 5; // This is 54 line.
..
..
}
}
and i have the following error message:
sync_mbox.c:54: `hola' undeclared (first use in this
function)
Thanks
Best regards..
Carlos Camargo
__________________________________________________
Do You Yahoo!?
Yahoo! Auctions - buy the things you want at great prices
http://auctions.yahoo.com/
^ permalink raw reply [flat|nested] 5+ messages in thread
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