File: itkCheckSyncBuiltins.cxx

package info (click to toggle)
insighttoolkit4 4.13.3withdata-dfsg2-4
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 491,256 kB
  • sloc: cpp: 557,600; ansic: 180,546; fortran: 34,788; python: 16,572; sh: 2,187; lisp: 2,070; tcl: 993; java: 362; perl: 200; makefile: 133; csh: 81; pascal: 69; xml: 19; ruby: 10
file content (17 lines) | stat: -rw-r--r-- 423 bytes parent folder | download | duplicates (9) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
 
#include <stdio.h>
#include <cstdlib>

int main()
{
  /* Test whether gcc/clang __sync_ builtins are defined */
  /* These are for gcc >= 4.1.2 and for clang >= 2.0.1 */
  /* Only certain platforms support them intrinsically */
  /* (guaranteed support on x86_64, ia64, mips, alpha) */

  static volatile unsigned long v = 0;
  unsigned long u = __sync_add_and_fetch(&v, 1);

  if (u - 1 == 0) { return 0; }

  return 1;
}