Oops. I've folded this in:
diff --git a/lib/ovs-atomic-gcc4+.h b/lib/ovs-atomic-gcc4+.h
index 4476162..4938261 100644
--- a/lib/ovs-atomic-gcc4+.h
+++ b/lib/ovs-atomic-gcc4+.h
@@ -238,6 +238,18 @@ typedef struct {
} atomic_flag;
#define ATOMIC_FLAG_INIT { false }
+static inline void
+atomic_flag_init(volatile atomic_flag *object OVS_UNUSED)
+{
+ /* Nothing to do. */
+}
+
+static inline void
+atomic_flag_destroy(volatile atomic_flag *object OVS_UNUSED)
+{
+ /* Nothing to do. */
+}
+
static inline bool
atomic_flag_test_and_set(volatile atomic_flag *object)
{
On Mon, Dec 30, 2013 at 10:35:03AM -0800, Pravin Shelar wrote:
> I am getting following linking error due to missing definition for
> ovs-atomic-gcc4+.h
>
> lib/.libs/libopenvswitch.a(dpif-netdev.o): In function `dp_netdev_free':
> /home/pravin/ovs/dpdk/openvswitch/lib/dpif-netdev.c:375: undefined
> reference to `atomic_flag_destroy'
> lib/.libs/libopenvswitch.a(dpif-netdev.o): In function `create_dp_netdev':
> /home/pravin/ovs/dpdk/openvswitch/lib/dpif-netdev.c:290: undefined
> reference to `atomic_flag_init'
>
>
> On Fri, Dec 27, 2013 at 8:03 PM, Ben Pfaff <b...@nicira.com> wrote:
> > Standard C11 doesn't need these functions because it is able to require
> > implementations not to need them. But we can't construct a portable
> > implementation that does not need them in every case, so this commit adds
> > them.
> >
> > These functions are only needed for atomic_flag objects that are
> > dynamically allocated (because statically allocated objects can use
> > ATOMIC_FLAG_INIT). So far there aren't any of those, but an upcoming
> > commit will introduce one.
> >
> > Signed-off-by: Ben Pfaff <b...@nicira.com>
> > ---
> > lib/ovs-atomic-c11.h | 12 ++++++++++++
> > lib/ovs-atomic-flag-gcc4.7+.h | 12 ++++++++++++
> > lib/ovs-atomic-pthreads.c | 16 ++++++++++++++++
> > lib/ovs-atomic-pthreads.h | 3 +++
> > lib/ovs-atomic.h | 22 ++++++++++++++++++++++
> > 5 files changed, 65 insertions(+)
> >
> > diff --git a/lib/ovs-atomic-c11.h b/lib/ovs-atomic-c11.h
> > index 9dc687c..97262b2 100644
> > --- a/lib/ovs-atomic-c11.h
> > +++ b/lib/ovs-atomic-c11.h
> > @@ -60,3 +60,15 @@ typedef _Atomic(int64_t) atomic_int64_t;
> > (*(ORIG) = atomic_fetch_xor_explicit(RMW, ARG, ORDER), (void) 0)
> > #define atomic_and_explicit(RMW, ARG, ORIG, ORDER) \
> > (*(ORIG) = atomic_fetch_and_explicit(RMW, ARG, ORDER), (void) 0)
> > +
> > +static inline void
> > +atomic_flag_init(volatile atomic_flag *object OVS_UNUSED)
> > +{
> > + /* Nothing to do. */
> > +}
> > +
> > +static inline void
> > +atomic_flag_destroy(volatile atomic_flag *object OVS_UNUSED)
> > +{
> > + /* Nothing to do. */
> > +}
> > diff --git a/lib/ovs-atomic-flag-gcc4.7+.h b/lib/ovs-atomic-flag-gcc4.7+.h
> > index c42c7ca..385d0de 100644
> > --- a/lib/ovs-atomic-flag-gcc4.7+.h
> > +++ b/lib/ovs-atomic-flag-gcc4.7+.h
> > @@ -26,6 +26,18 @@ typedef struct {
> > } atomic_flag;
> > #define ATOMIC_FLAG_INIT { .b = false }
> >
> > +static inline void
> > +atomic_flag_init(volatile atomic_flag *object OVS_UNUSED)
> > +{
> > + /* Nothing to do. */
> > +}
> > +
> > +static inline void
> > +atomic_flag_destroy(volatile atomic_flag *object OVS_UNUSED)
> > +{
> > + /* Nothing to do. */
> > +}
> > +
> > static inline bool
> > atomic_flag_test_and_set_explicit(volatile atomic_flag *object,
> > memory_order order)
> > diff --git a/lib/ovs-atomic-pthreads.c b/lib/ovs-atomic-pthreads.c
> > index a501b82..4b3a337 100644
> > --- a/lib/ovs-atomic-pthreads.c
> > +++ b/lib/ovs-atomic-pthreads.c
> > @@ -20,6 +20,22 @@
> > #include "ovs-thread.h"
> >
> > #if OVS_ATOMIC_PTHREADS_IMPL
> > +void
> > +atomic_flag_init(volatile atomic_flag *flag_)
> > +{
> > + atomic_flag *flag = CONST_CAST(atomic_flag *, flag_);
> > +
> > + pthread_mutex_init(&flag->mutex, NULL);
> > +}
> > +
> > +void
> > +atomic_flag_destroy(volatile atomic_flag *flag_)
> > +{
> > + atomic_flag *flag = CONST_CAST(atomic_flag *, flag_);
> > +
> > + pthread_mutex_destroy(&flag->mutex);
> > +}
> > +
> > bool
> > atomic_flag_test_and_set(volatile atomic_flag *flag_)
> > {
> > diff --git a/lib/ovs-atomic-pthreads.h b/lib/ovs-atomic-pthreads.h
> > index 2f47a9c..840c7a6 100644
> > --- a/lib/ovs-atomic-pthreads.h
> > +++ b/lib/ovs-atomic-pthreads.h
> > @@ -148,6 +148,9 @@ typedef struct {
> > } atomic_flag;
> > #define ATOMIC_FLAG_INIT { false, PTHREAD_MUTEX_INITIALIZER }
> >
> > +void atomic_flag_init(volatile atomic_flag *);
> > +void atomic_flag_destroy(volatile atomic_flag *);
> > +
> > bool atomic_flag_test_and_set(volatile atomic_flag *);
> > bool atomic_flag_test_and_set_explicit(volatile atomic_flag *,
> > memory_order);
> >
> > diff --git a/lib/ovs-atomic.h b/lib/ovs-atomic.h
> > index a9ae4ae..e714114 100644
> > --- a/lib/ovs-atomic.h
> > +++ b/lib/ovs-atomic.h
> > @@ -204,9 +204,31 @@
> > * atomic_flag is a typedef for a type with two states, set and clear, that
> > * provides atomic test-and-set functionality.
> > *
> > + *
> > + * Life Cycle
> > + * ----------
> > + *
> > * ATOMIC_FLAG_INIT is an initializer for atomic_flag. The initial state
> > is
> > * "clear".
> > *
> > + * C11 does not have an initialization or destruction function for
> > atomic_flag,
> > + * because implementations should not need one (one may simply
> > + * atomic_flag_clear() an uninitialized atomic_flag), but some
> > implementations
> > + * of the OVS atomics do need them. Thus, the following two functions are
> > + * provided for initializing and destroying non-static atomic_flags:
> > + *
> > + * void atomic_flag_init(volatile atomic_flag *object);
> > + *
> > + * Initializes 'object'. The initial state is "clear".
> > + *
> > + * void atomic_flag_destroy(volatile atomic_flag *object);
> > + *
> > + * Destroys 'object'.
> > + *
> > + *
> > + * Operations
> > + * ----------
> > + *
> > * The following functions are available.
> > *
> > * bool atomic_flag_test_and_set(atomic_flag *object)
> > --
> > 1.7.10.4
> >
> > _______________________________________________
> > dev mailing list
> > dev@openvswitch.org
> > http://openvswitch.org/mailman/listinfo/dev
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