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Full Discussion: Dereferencing pointer to incomplete type
Top Forums Programming Dereferencing pointer to incomplete type Post 302416805 by jim mcnamara on Tuesday 27th of April 2010 07:59:52 PM
Old 04-27-2010
I was going to try to get you to code thru your problem, but there were several issues, not just the pointer problem. You HAVE to call pthread_wait in main() or the whole process will exit and the thread may or may not have ever executed Client(). So I just made a few changes and let it go with that.

I removed a bunch of intermediate variables, I left error checking up to you. Check return codes. Always.

Code:
#include<stdio.h>
#include<string.h>
#include<pthread.h>

void *Client(void *);

typedef
struct {
 	long int x;
	long int y;
	} coord_t;


int main()
{
  int rc=0;
  int *p=&rc;
  coord_t my_coord={0,0};
  pthread_t threadid;
  
  printf("enter the coordinates for i & j ");
  scanf("%ld %ld", &my_coord.x, &my_coord.y);
  rc = pthread_create(&threadid, NULL, Client, &my_coord);
  pthread_join(threadid, (void **)&p);
  return 0;
}

void *Client(void * threadarg)
{
	coord_t *p = (coord_t *) threadarg;
	
	printf("%ld ", p->x);
	printf("%ld\n", p->y);
	pthread_exit(0);
}

 

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LEARN ABOUT SUNOS

wchar

wchar.h(3HEAD)							      Headers							    wchar.h(3HEAD)

NAME

       wchar.h, wchar - wide-character handling

SYNOPSIS

       #include <wchar.h>

DESCRIPTION

       The <wchar.h> header defines the following types:

       wchar_t	       As described in <stddef.h>.

       wint_t	       An integer type capable of storing any valid value of wchar_t or WEOF.

       wctype_t        A scalar type of a data object that can hold values which represent locale-specific character classification.

       mbstate_t       An  object  type  other	than  an  array  type  that can hold the conversion state information necessary to convert between
		       sequences of (possibly multi-byte) characters and wide characters.  If a codeset is being  used	such  that   an  mbstate_t
		       needs to preserve more than two levels of reserved state, the results are unspecified.

       FILE	       As described in <stdio.h>.

       size_t	       As described in <stddef.h>.

       va_list	       As described in <stdarg.h>.

       The  implementation  supports  one or more programming environments in which the width of wint_t is no greater than the width of type long.
       The names of these programming environments can be obtained using the confstr(3C) function or the getconf(1) utility.

       The <wchar.h> header defines the following macros:

       WCHAR_MAX       The maximum value representable by an object of type wchar_t.

       WCHAR_MIN       The minimum value representable by an object of type wchar_t.

       WEOF	       Constant expression of type wint_t that is returned by several WP functions to indicate end-of-file.

       NULL	       As described in <stddef.h>.

       The tag tm is declared as naming an incomplete structure type, the contents of which are described in the header <time.h>.

       Inclusion of the <wchar.h> header can make visible all symbols from the headers <ctype.h>,  <string.h>, <stdarg.h>, <stddef.h>,	<stdio.h>,
       <stdlib.h>, and <time.h>.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       getconf(1),  btowc(3C),	confstr(3C),  fgetwc(3C),  getws(3C),  fputwc(3C),  fputws(3C),  fwide(3C),  fwprintf(3C), fwscanf(3C), getwc(3C),
       getwchar(3C), iswalpha(3C), iswctype(3C), mbsinit(3C), mbrlen(3C), mbrtowc(3C),	mbsrtowcs(3C),	towlower(3C),  towupper(3C),  ungetwc(3C),
       vfwprintf(3C),  wcrtomb(3C),  wcsrtombs(3C),  wcstring(3C),  wcsstr(3C),  wcstod(3C),  wcscoll(3C),  wcsftime(3C), wcstol(3C), wcstoul(3C),
       wcswidth(3C),  wcsxfrm(3C),  wctob(3C),	wctype(3C),  wcwidth(3C),  wmemchr(3C),  wmemcmp(3C),  wmemcpy(3C),   wmemmove(3C),   wmemset(3C),
       stdarg(3EXT),  stddef.h(3HEAD),	stdio.h(3HEAD),  stdlib.h(3HEAD),  string.h(3HEAD),  time.h(3HEAD),  wctype.h(3HEAD), attributes(5), stan-
       dards(5)

SunOS 5.10							    10 Sep 2004 						    wchar.h(3HEAD)
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