CODEWITHSUNDEEP
cstruct
signal7
signal7

Reputation: 49

Unable to include timespec in another struct

I've read many posts on this and I can tell you (every post I've read makes this set of assumptions, so lets get it out of way early):

Code:

#if __STDC_VERSION__ >= 199901L
#define _XOPEN_SOURCE 600
#else
#define _XOPEN_SOURCE 500
#endif /* __STDC_VERSION__ */

#include <linux/soundcard.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>

#include <string.h>
#include <stdlib.h>
#include <time.h>
#define uint unsigned int

struct KEYDATA 
{
   struct timestruct duration; 
} ;

// output/display function
int main(void) 
{
   struct KEYDATA keyData[20]; 

   keyData.duration.tv_nsec = 999;   

   return 0;
}

At compile time:

pi@raspberrypi:~/src/midi-timing $ gcc tmp.c -O2 -Wall -pedantic -o tmp -std=gnu99 -lrt
tmp.c:19:22: error: field ‘duration’ has incomplete type
    struct timestruct duration; 
                      ^
tmp.c: In function ‘main’:
tmp.c:27:11: error: request for member ‘duration’ in something not a structure or union
    keyData.duration.tv_nsec = 999;   
           ^
tmp.c:25:19: warning: variable ‘keyData’ set but not used [-Wunused-but-set-variable]
    struct KEYDATA keyData[20]; 
                   ^
pi@raspberrypi:~/src/midi-timing $

I'll admit I'm a little rusty on my C programming, but there must be something here I'm not seeing. If you see the error, please let me know. Thanks.

Upvotes: 0

Views: 1658

Answers (2)

ntshetty
ntshetty

Reputation: 1315

You need to replace timestruct with timespec

#if __STDC_VERSION__ >= 199901L
#define _XOPEN_SOURCE 600
#else
#define _XOPEN_SOURCE 500
#endif /* __STDC_VERSION__ */

#include <linux/soundcard.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>

#include <string.h>
#include <stdlib.h>
#include <time.h>
#define uint unsigned int

struct KEYDATA 
{
       //struct timestruct duration; 
      struct timespec duration;
} ;

// output/display function
int main(void) 
{
   struct KEYDATA keyData[20]; 

   //keyData.duration.tv_nsec = 999; 
   keyData->duration.tv_nsec = 999;   

   return 0;
}

Upvotes: 1

beeselmane
beeselmane

Reputation: 1218

You've identified the type of duration as struct timestruct instead of struct timespec. Simply fix this misspelling and I believe you should be fine.

Upvotes: 1

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