From edd65baa6d9f6b951f093a15b6fcb5771e3397e0 Mon Sep 17 00:00:00 2001
From: Ryan Lortie <desrt@desrt.ca>
Date: Tue, 24 May 2011 02:07:55 -0400
Subject: [PATCH] Add a test case for atomic ops

Make sure that the macros work properly with the range of types that
they are documented to work with and ensure that no strict aliasing
warnings are issued (even at the highest warning level).

https://bugzilla.gnome.org/show_bug.cgi?id=650935
---
 glib/tests/.gitignore  |  1 +
 glib/tests/Makefile.am |  4 ++++
 glib/tests/atomic.c    | 41 +++++++++++++++++++++++++++++++++++++++++
 3 files changed, 46 insertions(+)
 create mode 100644 glib/tests/atomic.c

diff --git a/glib/tests/.gitignore b/glib/tests/.gitignore
index 3c4a662e0..d05dbba4f 100644
--- a/glib/tests/.gitignore
+++ b/glib/tests/.gitignore
@@ -1,4 +1,5 @@
 array-test
+atomic
 base64
 bookmarkfile
 checksum
diff --git a/glib/tests/Makefile.am b/glib/tests/Makefile.am
index 2dd37e5a7..29e706ef9 100644
--- a/glib/tests/Makefile.am
+++ b/glib/tests/Makefile.am
@@ -177,6 +177,10 @@ TEST_PROGS    += unix-nothreads
 unix_nothreads_SOURCES = unix.c
 unix_nothreads_LDADD  = $(progs_ldadd)
 
+noinst_PROGRAMS += atomic
+atomic_CFLAGS = -Wstrict-aliasing=2 $(INCLUDES)
+atomic_LDADD = $(progs_ldadd)
+
 # some testing of gtester funcitonality
 XMLLINT=xmllint
 gtester-xmllint-check: # check testreport xml with xmllint if present
diff --git a/glib/tests/atomic.c b/glib/tests/atomic.c
new file mode 100644
index 000000000..e16baf02e
--- /dev/null
+++ b/glib/tests/atomic.c
@@ -0,0 +1,41 @@
+#include <glib.h>
+
+int
+main (void)
+{
+  guint u;
+  gint s;
+  gpointer vp;
+  int *ip;
+  gsize gs;
+
+  g_atomic_int_set (&u, 5);
+  g_atomic_int_get (&u);
+  g_atomic_int_compare_and_exchange (&u, 6, 7);
+  g_atomic_int_exchange_and_add (&u, 1);
+  g_atomic_int_add (&u, 1);
+  g_atomic_int_inc (&u);
+  (void) g_atomic_int_dec_and_test (&u);
+
+  g_atomic_int_set (&s, 5);
+  g_atomic_int_get (&s);
+  g_atomic_int_compare_and_exchange (&s, 6, 7);
+  g_atomic_int_exchange_and_add (&s, 1);
+  g_atomic_int_add (&s, 1);
+  g_atomic_int_inc (&s);
+  (void) g_atomic_int_dec_and_test (&s);
+
+  g_atomic_pointer_set (&vp, 0);
+  g_atomic_pointer_get (&vp);
+  g_atomic_pointer_compare_and_exchange (&vp, 0, 0);
+
+  g_atomic_pointer_set (&ip, 0);
+  g_atomic_pointer_get (&ip);
+  g_atomic_pointer_compare_and_exchange (&ip, 0, 0);
+
+  g_atomic_pointer_set (&gs, 0);
+  g_atomic_pointer_get (&gs);
+  g_atomic_pointer_compare_and_exchange (&gs, 0, 0);
+
+  return 0;
+}