chainbuffer fixed

network/chainbuffer.h

@@ -4,6 +4,7 @@
 #include <stddef.h>
 #include <stdint.h>
 #include <sys/types.h>
+#include <sys/uio.h>
 
 typedef struct chain_buffer_node chain_buffer_node_t;
 
@@ -12,10 +13,21 @@ typedef struct chain_buffer_s {
     chain_buffer_node_t *tail;
     size_t total_len;
     size_t chunk_size;
+
+    chain_buffer_node_t *free_list;
+    size_t free_count;
+    size_t free_limit;
+
     uint8_t *linear_cache;
     size_t linear_cap;
 } chain_buffer_t;
 
+typedef struct chain_buffer_list_s {
+    chain_buffer_node_t *head;
+    chain_buffer_node_t *tail;
+    size_t total_len;
+} chain_buffer_list_t;
+
 void chain_buffer_init(chain_buffer_t *buf, size_t chunk_size);
 void chain_buffer_reset(chain_buffer_t *buf);
 
@@ -26,4 +38,15 @@ size_t chain_buffer_drain(chain_buffer_t *buf, size_t len);
 const uint8_t *chain_buffer_linearize(chain_buffer_t *buf, size_t *out_len);
 ssize_t chain_buffer_send_fd(chain_buffer_t *buf, int fd, int flags);
 
+/* readv zero-copy recv helpers */
+int chain_buffer_prepare_recv_iov(chain_buffer_t *buf, struct iovec *iov, int max_iov);
+size_t chain_buffer_commit_recv(chain_buffer_t *buf, size_t len);
+
+/* ownership transfer helpers */
+void chain_buffer_list_init(chain_buffer_list_t *list);
+size_t chain_buffer_list_len(const chain_buffer_list_t *list);
+int chain_buffer_list_iov(const chain_buffer_list_t *list, struct iovec *iov, int max_iov);
+int chain_buffer_detach_prefix(chain_buffer_t *buf, size_t len, chain_buffer_list_t *out);
+void chain_buffer_list_release(chain_buffer_t *owner, chain_buffer_list_t *list);
+
 #endif