tst_test: add macro helper to invoke pthread_once()
Signed-off-by: Alexey Kodanev <alexey.kodanev@oracle.com>
Acked-by: Cyril Hrubis <chrubis@suse.cz>
diff --git a/include/tst_safe_pthread.h b/include/tst_safe_pthread.h
index 810ddcb..0242d4c 100644
--- a/include/tst_safe_pthread.h
+++ b/include/tst_safe_pthread.h
@@ -18,6 +18,20 @@
#ifndef TST_SAFE_PTHREAD_H__
#define TST_SAFE_PTHREAD_H__
+/*
+ * Macro to use for making functions called only once in
+ * multi-threaded tests such as init or cleanup function.
+ * The first call to @name_fn function by any thread shall
+ * call the @exec_fn. Subsequent calls shall not call @exec_fn.
+ * *_fn functions must not take any arguments.
+ */
+#define TST_DECLARE_ONCE_FN(name_fn, exec_fn) \
+ void name_fn(void) \
+ { \
+ static pthread_once_t ltp_once = PTHREAD_ONCE_INIT; \
+ pthread_once(<p_once, exec_fn); \
+ }
+
int safe_pthread_create(const char *file, const int lineno,
pthread_t *thread_id, const pthread_attr_t *attr,
void *(*thread_fn)(void *), void *arg);