c11_atomic.c revision 1.3 
11.3Srillig/*	$NetBSD: c11_atomic.c,v 1.3 2023/01/21 13:48:40 rillig Exp $	*/
21.1Srillig# 3 "c11_atomic.c"
31.1Srillig
41.1Srillig/*
51.1Srillig * The keyword '_Atomic' was added in C11.  This test ensures that in C11
61.1Srillig * mode, '_Atomic' can be used as both type qualifier and type specifier.
71.1Srillig *
81.1Srillig * See also:
91.1Srillig *	C11 6.7.3 Type qualifiers
101.1Srillig *	C11 6.7.2.4 Atomic type specifiers
111.1Srillig */
121.1Srillig
131.1Srillig/* lint1-extra-flags: -Ac11 */
141.1Srillig
151.1Srillig/* C11 6.7.3 "Type qualifiers" */
161.1Srilligtypedef _Atomic int atomic_int;
171.1Srillig
181.1Srilligtypedef _Atomic struct {
191.1Srillig	int field;
201.1Srillig} atomic_struct;
211.1Srillig
221.3Srillig/* C11 6.7.2.4 "Atomic type specifiers" */
231.3Srilligdouble *
241.3Srilligatomic_ptr_cmpexch(_Atomic(double *)*ptr_var, _Atomic(double *) new_value)
251.3Srillig{
261.3Srillig	double *old = *ptr_var;
271.3Srillig	*ptr_var = new_value;
281.3Srillig	return old;
291.3Srillig}
30