X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=lib%2Flibrte_eal%2Fcommon%2Finclude%2Farch%2Fx86%2Frte_atomic_32.h;h=a932f354056c32e6131b5649f2201d77cc4e6ce0;hb=refs%2Fchanges%2F24%2F14224%2F1;hp=fb3abf187998474d996c546034edf526fd62001a;hpb=ca33590b6af032bff57d9cc70455660466a654b2;p=deb_dpdk.git

diff --git a/lib/librte_eal/common/include/arch/x86/rte_atomic_32.h b/lib/librte_eal/common/include/arch/x86/rte_atomic_32.h
index fb3abf18..a932f354 100644
--- a/lib/librte_eal/common/include/arch/x86/rte_atomic_32.h
+++ b/lib/librte_eal/common/include/arch/x86/rte_atomic_32.h
@@ -98,6 +98,18 @@ rte_atomic64_cmpset(volatile uint64_t *dst, uint64_t exp, uint64_t src)
 	return res;
 }
 
+static inline uint64_t
+rte_atomic64_exchange(volatile uint64_t *dest, uint64_t val)
+{
+	uint64_t old;
+
+	do {
+		old = *dest;
+	} while (rte_atomic64_cmpset(dest, old, val) == 0);
+
+	return old;
+}
+
 static inline void
 rte_atomic64_init(rte_atomic64_t *v)
 {