From 2f6d7bb93c157b874efb79a2d1583a4c368bf89a Mon Sep 17 00:00:00 2001 From: Sirshak Das Date: Wed, 3 Oct 2018 22:53:51 +0000 Subject: vppinfra: add atomic macros for __sync builtins This is first part of addition of atomic macros with only macros for __sync builtins. - Based on earlier patch by Damjan (https://gerrit.fd.io/r/#/c/10729/) Additionally - clib_atomic_release macro added and used in the absence of any memory barrier. - clib_atomic_bool_cmp_and_swap added Change-Id: Ie4e48c1e184a652018d1d0d87c4be80ddd180a3b Original-patch-by: Damjan Marion Signed-off-by: Sirshak Das Reviewed-by: Honnappa Nagarahalli Reviewed-by: Ola Liljedahl Reviewed-by: Steve Capper --- src/plugins/ioam/analyse/ioam_analyse.h | 20 +++++++++++--------- 1 file changed, 11 insertions(+), 9 deletions(-) (limited to 'src/plugins/ioam/analyse/ioam_analyse.h') diff --git a/src/plugins/ioam/analyse/ioam_analyse.h b/src/plugins/ioam/analyse/ioam_analyse.h index 881b0451721..3aec7a792d8 100644 --- a/src/plugins/ioam/analyse/ioam_analyse.h +++ b/src/plugins/ioam/analyse/ioam_analyse.h @@ -191,7 +191,7 @@ ip6_ioam_analyse_set_paths_down (ioam_analyser_data_t * data) ioam_path_map_t *path; u8 k, i; - while (__sync_lock_test_and_set (data->writer_lock, 1)) + while (clib_atomic_test_and_set (data->writer_lock)) ; trace_data = &data->trace_data; @@ -208,7 +208,7 @@ ip6_ioam_analyse_set_paths_down (ioam_analyser_data_t * data) for (k = 0; k < trace_record->num_nodes; k++) path[k].state_up = 0; } - *(data->writer_lock) = 0; + clib_atomic_release (data->writer_lock); } always_inline void @@ -225,7 +225,7 @@ ip6_ioam_analyse_hbh_trace_loopback (ioam_analyser_data_t * data, u16 size_of_traceopt_per_node; u16 size_of_all_traceopts; - while (__sync_lock_test_and_set (data->writer_lock, 1)) + while (clib_atomic_test_and_set (data->writer_lock)) ; trace_data = &data->trace_data; @@ -277,7 +277,7 @@ ip6_ioam_analyse_hbh_trace_loopback (ioam_analyser_data_t * data, } } end: - *(data->writer_lock) = 0; + clib_atomic_release (data->writer_lock); } always_inline int @@ -295,7 +295,7 @@ ip6_ioam_analyse_hbh_trace (ioam_analyser_data_t * data, ioam_path_map_t *path = NULL; ioam_analyse_trace_record *trace_record; - while (__sync_lock_test_and_set (data->writer_lock, 1)) + while (clib_atomic_test_and_set (data->writer_lock)) ; trace_data = &data->trace_data; @@ -409,7 +409,7 @@ found_match: (u32) ((sum + delay) / (data->seqno_data.rx_packets + 1)); } DONE: - *(data->writer_lock) = 0; + clib_atomic_release (data->writer_lock); return 0; } @@ -417,13 +417,14 @@ always_inline int ip6_ioam_analyse_hbh_e2e (ioam_analyser_data_t * data, ioam_e2e_packet_t * e2e, u16 len) { - while (__sync_lock_test_and_set (data->writer_lock, 1)) + while (clib_atomic_test_and_set (data->writer_lock)) ; ioam_analyze_seqno (&data->seqno_data, (u64) clib_net_to_host_u32 (e2e->e2e_data)); - *(data->writer_lock) = 0; + clib_atomic_release (data->writer_lock); + return 0; } @@ -510,7 +511,8 @@ ioam_analyse_init_data (ioam_analyser_data_t * data) data->writer_lock = clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES, CLIB_CACHE_LINE_BYTES); - *(data->writer_lock) = 0; + + clib_atomic_release (data->writer_lock); trace_data = &(data->trace_data); for (j = 0; j < IOAM_MAX_PATHS_PER_FLOW; j++) -- cgit 1.2.3-korg