[dpdk-dev] [PATCH v2 1/4] eal: add API to check if its interrupt context
Sunil Kumar Kori
skori at marvell.com
Wed Nov 27 11:22:19 CET 2019
Added an API to check if current execution is in interrupt
context. This will be helpful to handle nested interrupt cases.
Signed-off-by: Harman Kalra <hkalra at marvell.com>
Signed-off-by: Sunil Kumar Kori <skori at marvell.com>
---
v2:
- Rebased patch on 19.11-rc4
lib/librte_eal/common/include/rte_interrupts.h | 15 +++++++++++++++
lib/librte_eal/freebsd/eal/eal_interrupts.c | 5 +++++
lib/librte_eal/linux/eal/eal_interrupts.c | 5 +++++
lib/librte_eal/rte_eal_version.map | 1 +
4 files changed, 26 insertions(+)
diff --git a/lib/librte_eal/common/include/rte_interrupts.h b/lib/librte_eal/common/include/rte_interrupts.h
index e3b406abc..0a82e28a8 100644
--- a/lib/librte_eal/common/include/rte_interrupts.h
+++ b/lib/librte_eal/common/include/rte_interrupts.h
@@ -138,6 +138,21 @@ int rte_intr_disable(const struct rte_intr_handle *intr_handle);
__rte_experimental
int rte_intr_ack(const struct rte_intr_handle *intr_handle);
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
+ * Check if currently executing in interrupt context
+ *
+ * @return
+ * - positive in case of interrupt context
+ * - zero in case of process context
+ * - negative if unsuccessful
+ */
+__rte_experimental
+int
+rte_thread_is_intr(void);
+
#ifdef __cplusplus
}
#endif
diff --git a/lib/librte_eal/freebsd/eal/eal_interrupts.c b/lib/librte_eal/freebsd/eal/eal_interrupts.c
index f6831b790..ce2a27b4a 100644
--- a/lib/librte_eal/freebsd/eal/eal_interrupts.c
+++ b/lib/librte_eal/freebsd/eal/eal_interrupts.c
@@ -671,3 +671,8 @@ rte_intr_free_epoll_fd(struct rte_intr_handle *intr_handle)
{
RTE_SET_USED(intr_handle);
}
+
+int rte_thread_is_intr(void)
+{
+ return pthread_equal(intr_thread, pthread_self());
+}
diff --git a/lib/librte_eal/linux/eal/eal_interrupts.c b/lib/librte_eal/linux/eal/eal_interrupts.c
index 1955324d3..c00f5a575 100644
--- a/lib/librte_eal/linux/eal/eal_interrupts.c
+++ b/lib/librte_eal/linux/eal/eal_interrupts.c
@@ -1487,3 +1487,8 @@ rte_intr_cap_multiple(struct rte_intr_handle *intr_handle)
return 0;
}
+
+int rte_thread_is_intr(void)
+{
+ return pthread_equal(intr_thread, pthread_self());
+}
diff --git a/lib/librte_eal/rte_eal_version.map b/lib/librte_eal/rte_eal_version.map
index e38d02530..397e787cf 100644
--- a/lib/librte_eal/rte_eal_version.map
+++ b/lib/librte_eal/rte_eal_version.map
@@ -332,4 +332,5 @@ EXPERIMENTAL {
# added in 19.11
rte_log_get_stream;
rte_mcfg_get_single_file_segments;
+ rte_thread_is_intr;
};
--
2.17.1
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