http: generalize buffer implementation

And add support for passing of pointers

Type: improvement

Signed-off-by: Florin Coras <fcoras@cisco.com>
Change-Id: Ida3e5ae4ff7842366ae92a5f33c5e761355951a6

1 files changed, 82 insertions, 0 deletions

diff --git a/src/plugins/http/http_buffer.h b/src/plugins/http/http_buffer.h
new file mode 100644
index 00000000000..5c7569b9e3c
--- /dev/null
+++ b/src/plugins/http/http_buffer.h
@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2022 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef SRC_PLUGINS_HTTP_HTTP_BUFFER_H_
+#define SRC_PLUGINS_HTTP_HTTP_BUFFER_H_
+
+#include <svm/svm_fifo.h>
+
+#define HTTP_BUFFER_DATA_SZ 24
+
+typedef enum http_buffer_type_
+{
+  HTTP_BUFFER_FIFO,
+  HTTP_BUFFER_PTR,
+} http_buffer_type_t;
+
+typedef struct http_buffer_vft_ http_buffer_vft_t;
+
+typedef struct http_buffer_
+{
+  http_buffer_vft_t *vft;
+  u8 data[HTTP_BUFFER_DATA_SZ];
+} http_buffer_t;
+
+struct http_buffer_vft_
+{
+  void (*init) (http_buffer_t *, void *data, u32 len);
+  void (*free) (http_buffer_t *);
+  svm_fifo_seg_t *(*get_segs) (http_buffer_t *, u32 max_len, u32 *n_segs);
+  int (*drain) (http_buffer_t *, u32 len);
+  u8 (*is_drained) (http_buffer_t *);
+};
+
+void http_buffer_init (http_buffer_t *hb, http_buffer_type_t type,
+		       svm_fifo_t *f, u32 data_len);
+
+static inline void
+http_buffer_free (http_buffer_t *hb)
+{
+  if (hb->vft)
+    hb->vft->free (hb);
+}
+
+static inline svm_fifo_seg_t *
+http_buffer_get_segs (http_buffer_t *hb, u32 max_len, u32 *n_segs)
+{
+  return hb->vft->get_segs (hb, max_len, n_segs);
+}
+
+static inline int
+http_buffer_drain (http_buffer_t *hb, u32 len)
+{
+  return hb->vft->drain (hb, len);
+}
+
+static inline u8
+http_buffer_is_drained (http_buffer_t *hb)
+{
+  return hb->vft->is_drained (hb);
+}
+
+#endif /* SRC_PLUGINS_HTTP_HTTP_BUFFER_H_ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */