Align with libbpf function names (#167)

* Align with libbpf function names
* Expose poll, consumer leave next alone

Author: nicholasberlin

non-GPL/Events/Lib/EbpfEvents.c

@@ -663,6 +663,22 @@ int ebpf_event_ctx__next(struct ebpf_event_ctx *ctx, int timeout)
     return consumed > 0 ? 0 : consumed;
 }
 
+int ebpf_event_ctx__poll(struct ebpf_event_ctx *ctx, int timeout)
+{
+    if (!ctx)
+        return -1;
+
+    return ring_buffer__poll(ctx->ringbuf, timeout);
+}
+
+int ebpf_event_ctx__consume(struct ebpf_event_ctx *ctx)
+{
+    if (!ctx)
+        return -1;
+
+    return ring_buffer__consume(ctx->ringbuf);
+}
+
 void ebpf_event_ctx__destroy(struct ebpf_event_ctx **ctx)
 {
     if (!ctx)

non-GPL/Events/Lib/EbpfEvents.h

@@ -42,9 +42,26 @@ uint64_t ebpf_event_ctx__get_features(struct ebpf_event_ctx *ctx);
 
 /* Consumes as many events as possible from the event context and returns the
  * number consumed.
+ *
+ * returns 0 on success, or less than 0 on failure
  */
 int ebpf_event_ctx__next(struct ebpf_event_ctx *ctx, int timeout);
 
+/* Consumes as many events as possible from the event context and returns the
+ * number consumed.  This will internally poll for events.
+ *
+ * returns the number of events acted upon, or less than 0 on failure.
+ */
+int ebpf_event_ctx__poll(struct ebpf_event_ctx *ctx, int timeout);
+
+/* Consumes as many events as possible from the event context and returns the
+ * number consumed. Does not poll. This is good if you are polling outside
+ * this library.
+ *
+ * returns the number of events acted upon, or less than 0 on failure.
+ */
+int ebpf_event_ctx__consume(struct ebpf_event_ctx *ctx);
+
 void ebpf_event_ctx__destroy(struct ebpf_event_ctx **ctx);
 
 /* Retrieve app trustlist map from ctx */