tools lib: Introduce fdarray duplicate function

[linux-2.6-microblaze.git] / tools / lib / api / fd / array.c

diff --git a/tools/lib/api/fd/array.c b/tools/lib/api/fd/array.c
index 5e6cb9d..f0f1952 100644 (file)
--- a/tools/lib/api/fd/array.c
+++ b/tools/lib/api/fd/array.c
@@ -88,6 +88,23 @@ int fdarray__add(struct fdarray *fda, int fd, short revents, enum fdarray_flags
        return pos;
 }
 
+int fdarray__dup_entry_from(struct fdarray *fda, int pos, struct fdarray *from)
+{
+       struct pollfd *entry;
+       int npos;
+
+       if (pos >= from->nr)
+               return -EINVAL;
+
+       entry = &from->entries[pos];
+
+       npos = fdarray__add(fda, entry->fd, entry->events, from->priv[pos].flags);
+       if (npos >= 0)
+               fda->priv[npos] = from->priv[pos];
+
+       return npos;
+}
+
 int fdarray__filter(struct fdarray *fda, short revents,
                    void (*entry_destructor)(struct fdarray *fda, int fd, void *arg),
                    void *arg)