[PATCH i-g-t v14 1/4] lib/igt_core: add igt_destructor helper macro

[Xin Wang <x.wang@intel.com>]

Add igt_destructor alongside igt_constructor to make it easy to run
library teardown code when the binary unloads/exits.

Signed-off-by: Xin Wang <x.wang@intel.com>
---
 lib/igt_core.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/lib/igt_core.h b/lib/igt_core.h
index c0908a8edb..c2565729b9 100644
--- a/lib/igt_core.h
+++ b/lib/igt_core.h
@@ -524,6 +524,18 @@ void igt_simple_init_parse_opts(int *argc, char **argv,
 	__attribute__((constructor)) \
 	static void igt_unique(__igt_constructor_l)(void)
 
+/**
+ * igt_destructor:
+ *
+ * Convenience macro to run the provided code block when igt is exiting,
+ * after all tests have been run. This should be used for parts of the igt
+ * library that require de-initialization of objects with global context.
+ * This code block will be executed exactly once.
+ */
+#define igt_destructor \
+	__attribute__((destructor)) \
+	static void igt_unique(__igt_destructor_l)(void)
+
 __noreturn __attribute__((format(printf, 1, 2)))
 void igt_skip(const char *f, ...);
 __noreturn __attribute__((format(printf, 5, 6)))
-- 
2.43.0