用户态网络缓冲区 chain-buffer

network/chainbuffer.h

@@ -0,0 +1,29 @@
+#ifndef __CHAINBUFFER_H__
+#define __CHAINBUFFER_H__
+
+#include <stddef.h>
+#include <stdint.h>
+#include <sys/types.h>
+
+typedef struct chain_buffer_node chain_buffer_node_t;
+
+typedef struct chain_buffer_s {
+    chain_buffer_node_t *head;
+    chain_buffer_node_t *tail;
+    size_t total_len;
+    size_t chunk_size;
+    uint8_t *linear_cache;
+    size_t linear_cap;
+} chain_buffer_t;
+
+void chain_buffer_init(chain_buffer_t *buf, size_t chunk_size);
+void chain_buffer_reset(chain_buffer_t *buf);
+
+size_t chain_buffer_len(const chain_buffer_t *buf);
+int chain_buffer_append(chain_buffer_t *buf, const void *data, size_t len);
+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);
+
+#endif