👤
Home Man
Search
Today's Posts
Register

Linux & Unix Commands - Search Man Pages
Man Page or Keyword Search:
Select Section of Man Page:
Select Man Page Repository:

NetBSD 6.1.5 - man page for __builtin_object_size (netbsd section 3)

__BUILTIN_OBJECT_SIZE(3)	   BSD Library Functions Manual 	 __BUILTIN_OBJECT_SIZE(3)

NAME
     __builtin_object_size -- return the size of the given object

SYNOPSIS
     size_t
     __builtin_object_size(void *ptr, int type);

DESCRIPTION
     The __builtin_object_size() function is a gcc(1) built-in function that returns the size of
     the ptr object if known at compile time and the object does not have any side effects.

RETURN VALUES
     If the size of the object is not known or it has side effects the __builtin_object_size()
     function returns:

	   (size_t)-1  for type 0 and 1.

	   (size_t)0   for type 2 and 3.

     If the size of the object is known, then the __builtin_object_size() function returns the
     maximum size of all the objects that the compiler knows that they can be pointed to by ptr
     when type & 2 == 0, and the minimum size when type & 2 != 0.

SEE ALSO
     gcc(1), __builtin_return_address(3), attribute(3), ssp(3)

HISTORY
     The __builtin_object_size() appeared in GCC 4.1.

CAVEATS
     This is a non-standard, compiler-specific extension.

BSD					December 19, 2010				      BSD


All times are GMT -4. The time now is 03:29 PM.

Unix & Linux Forums Content Copyrightę1993-2018. All Rights Reserved.
×
UNIX.COM Login
Username:
Password:  
Show Password