From 3432c140c9c51e671a4d58bb428d5852426add1f Mon Sep 17 00:00:00 2001 From: "Todd Foggoa (tfoggoa)" Date: Wed, 3 Feb 2016 08:35:27 -0800 Subject: [PATCH 5/6] Allow applications to override rte_delay_us() Some applications may wish to define their own implentation of usec delay other than the existing blocking one. The default behavior remains unchanged. Signed-off-by: Todd Foggoa (tfoggoa) --- lib/librte_eal/common/eal_common_timer.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/lib/librte_eal/common/eal_common_timer.c b/lib/librte_eal/common/eal_common_timer.c index c4227cd..cc26b91 100644 --- a/lib/librte_eal/common/eal_common_timer.c +++ b/lib/librte_eal/common/eal_common_timer.c @@ -47,9 +47,21 @@ /* The frequency of the RDTSC timer resolution */ static uint64_t eal_tsc_resolution_hz; +/* Allow an override of the rte_delay_us function */ +int rte_delay_us_override (unsigned us) __attribute__((weak)); + +int +rte_delay_us_override(__attribute__((unused)) unsigned us) +{ + return 0; +} + void rte_delay_us(unsigned us) { + if (rte_delay_us_override(us)) + return; + const uint64_t start = rte_get_timer_cycles(); const uint64_t ticks = (uint64_t)us * rte_get_timer_hz() / 1E6; while ((rte_get_timer_cycles() - start) < ticks) -- 2.7.4