c42552d4e0
Change-Id: I08292ba39dc6012c2edbcdaed0b02a8ebe07aec4 Signed-off-by: Damjan Marion <damarion@cisco.com>
44 lines
1.3 KiB
Diff
44 lines
1.3 KiB
Diff
From 3432c140c9c51e671a4d58bb428d5852426add1f Mon Sep 17 00:00:00 2001
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From: "Todd Foggoa (tfoggoa)" <tfoggoa@cisco.com>
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Date: Wed, 3 Feb 2016 08:35:27 -0800
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Subject: [PATCH 5/6] Allow applications to override rte_delay_us()
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Some applications may wish to define their own implentation of
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usec delay other than the existing blocking one. The default
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behavior remains unchanged.
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Signed-off-by: Todd Foggoa (tfoggoa) <tfoggoa@cisco.com>
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---
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lib/librte_eal/common/eal_common_timer.c | 12 ++++++++++++
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1 file changed, 12 insertions(+)
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diff --git a/lib/librte_eal/common/eal_common_timer.c b/lib/librte_eal/common/eal_common_timer.c
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index c4227cd..cc26b91 100644
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--- a/lib/librte_eal/common/eal_common_timer.c
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+++ b/lib/librte_eal/common/eal_common_timer.c
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@@ -47,9 +47,21 @@
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/* The frequency of the RDTSC timer resolution */
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static uint64_t eal_tsc_resolution_hz;
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+/* Allow an override of the rte_delay_us function */
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+int rte_delay_us_override (unsigned us) __attribute__((weak));
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+
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+int
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+rte_delay_us_override(__attribute__((unused)) unsigned us)
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+{
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+ return 0;
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+}
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+
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void
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rte_delay_us(unsigned us)
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{
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+ if (rte_delay_us_override(us))
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+ return;
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+
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const uint64_t start = rte_get_timer_cycles();
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const uint64_t ticks = (uint64_t)us * rte_get_timer_hz() / 1E6;
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while ((rte_get_timer_cycles() - start) < ticks)
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--
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2.7.4
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