53 lines
1.7 KiB
C
53 lines
1.7 KiB
C
#ifndef __CHAINBUFFER_H__
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#define __CHAINBUFFER_H__
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#include <stddef.h>
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#include <stdint.h>
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#include <sys/types.h>
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#include <sys/uio.h>
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typedef struct chain_buffer_node chain_buffer_node_t;
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typedef struct chain_buffer_s {
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chain_buffer_node_t *head;
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chain_buffer_node_t *tail;
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size_t total_len;
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size_t chunk_size;
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chain_buffer_node_t *free_list;
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size_t free_count;
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size_t free_limit;
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uint8_t *linear_cache;
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size_t linear_cap;
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} chain_buffer_t;
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typedef struct chain_buffer_list_s {
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chain_buffer_node_t *head;
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chain_buffer_node_t *tail;
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size_t total_len;
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} chain_buffer_list_t;
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void chain_buffer_init(chain_buffer_t *buf, size_t chunk_size);
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void chain_buffer_reset(chain_buffer_t *buf);
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size_t chain_buffer_len(const chain_buffer_t *buf);
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int chain_buffer_append(chain_buffer_t *buf, const void *data, size_t len);
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size_t chain_buffer_drain(chain_buffer_t *buf, size_t len);
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const uint8_t *chain_buffer_linearize(chain_buffer_t *buf, size_t *out_len);
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ssize_t chain_buffer_send_fd(chain_buffer_t *buf, int fd, int flags);
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/* readv zero-copy recv helpers */
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int chain_buffer_prepare_recv_iov(chain_buffer_t *buf, struct iovec *iov, int max_iov);
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size_t chain_buffer_commit_recv(chain_buffer_t *buf, size_t len);
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/* ownership transfer helpers */
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void chain_buffer_list_init(chain_buffer_list_t *list);
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size_t chain_buffer_list_len(const chain_buffer_list_t *list);
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int chain_buffer_list_iov(const chain_buffer_list_t *list, struct iovec *iov, int max_iov);
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int chain_buffer_detach_prefix(chain_buffer_t *buf, size_t len, chain_buffer_list_t *out);
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void chain_buffer_list_release(chain_buffer_t *owner, chain_buffer_list_t *list);
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#endif
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