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#ifndef _CHUNK_H_
#define _CHUNK_H_
#include "buffer.h"
#include "array.h"
typedef struct chunk {
enum { UNUSED_CHUNK, MEM_CHUNK, FILE_CHUNK } type;
buffer *mem; /* either the storage of the mem-chunk or the read-ahead buffer */
struct {
/* filechunk */
buffer *name; /* name of the file */
off_t start; /* starting offset in the file */
off_t length; /* octets to send from the starting offset */
int fd;
struct {
char *start; /* the start pointer of the mmap'ed area */
size_t length; /* size of the mmap'ed area */
off_t offset; /* start is <n> octets away from the start of the file */
} mmap;
int is_temp; /* file is temporary and will be deleted on cleanup */
struct {
int fd;
off_t length;
off_t offset;
} copy;
} file;
off_t offset; /* octets sent from this chunk
the size of the chunk is either
- mem-chunk: mem->used - 1
- file-chunk: file.length
*/
struct {
off_t written;
int ret_val;
} async;
struct chunk *next;
} chunk;
typedef struct {
chunk *first;
chunk *last;
chunk *unused;
size_t unused_chunks;
array *tempdirs;
int is_closed; /* the input to this CQ is closed */
off_t bytes_in, bytes_out;
} chunkqueue;
LI_EXPORT chunkqueue* chunkqueue_init(void);
LI_EXPORT int chunkqueue_set_tempdirs(chunkqueue *c, array *tempdirs);
LI_EXPORT int chunkqueue_append_file(chunkqueue *c, buffer *fn, off_t offset, off_t len);
LI_EXPORT int chunkqueue_append_mem(chunkqueue *c, const char *mem, size_t len);
LI_EXPORT int chunkqueue_append_buffer(chunkqueue *c, buffer *mem);
LI_EXPORT int chunkqueue_prepend_buffer(chunkqueue *c, buffer *mem);
LI_EXPORT buffer * chunkqueue_get_append_buffer(chunkqueue *c);
LI_EXPORT buffer * chunkqueue_get_prepend_buffer(chunkqueue *c);
LI_EXPORT chunk * chunkqueue_get_append_tempfile(chunkqueue *cq);
LI_EXPORT int chunkqueue_steal_tempfile(chunkqueue *cq, chunk *in);
LI_EXPORT int chunkqueue_steal_chunk(chunkqueue *cq, chunk *c);
LI_EXPORT int chunkqueue_steal_chunks_len(chunkqueue *cq, chunk *c, size_t max_len);
LI_EXPORT int chunkqueue_steal_all_chunks(chunkqueue *cq, chunkqueue *in);
LI_EXPORT int chunkqueue_skip(chunkqueue *cq, off_t skip);
LI_EXPORT void chunkqueue_remove_empty_last_chunk(chunkqueue *cq);
LI_EXPORT int chunkqueue_remove_finished_chunks(chunkqueue *cq);
LI_EXPORT off_t chunkqueue_length(chunkqueue *c);
LI_EXPORT off_t chunkqueue_written(chunkqueue *c);
LI_EXPORT void chunkqueue_free(chunkqueue *c);
LI_EXPORT void chunkqueue_reset(chunkqueue *c);
LI_EXPORT int chunkqueue_is_empty(chunkqueue *c);
LI_EXPORT void chunkqueue_print(chunkqueue *cq);
#endif
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