[LTP] [PATCH 2/3] tst_test: add macro helper to invoke pthread_once()

Cyril Hrubis
2017-01-23T14:58:28Z

Hi!
> Signed-off-by: Alexey Kodanev <alexey.kodanev@oracle.com>
> ---
> include/tst_test.h | 14 ++++++++++++++
> 1 files changed, 14 insertions(+), 0 deletions(-)
>
> diff --git a/include/tst_test.h b/include/tst_test.h
> index 3c77a98..a4ba167 100644
> --- a/include/tst_test.h
> +++ b/include/tst_test.h
> @@ -71,6 +71,20 @@ pid_t safe_fork(const char *filename, unsigned int lineno);
> ({int ret = expr; \
> ret != 0 ? tst_res(TINFO, #expr " failed"), ret : ret; }) \
>
> +/*
> + * 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(&ltp_once, exec_fn); \
> + }

This should rather be in tst_safe_pthread.h, otherwise it's fine.

--
Cyril Hrubis
chrubis@suse.cz