byte is_fastbuf[0]; /* Dummy field for checking of type casts */
byte *bptr, *bstop; /* Access pointers */
byte *buffer, *bufend; /* Start and end of the buffer */
- byte *name; /* File name for error messages */
+ char *name; /* File name for error messages */
sh_off_t pos; /* Position of bstop in the file */
int (*refill)(struct fastbuf *); /* Get a buffer with new data */
void (*spout)(struct fastbuf *); /* Write buffer data to the file */
int can_overwrite_buffer; /* Can the buffer be altered? (see discussion above) 0=never, 1=temporarily, 2=permanently */
};
-/* FastIO on files with run-time parametrization */
+/* FastIO on files with several configurable back-ends */
enum fb_type { /* Which back-end you want to use */
FB_STD, /* Standard buffered I/O */
- FB_DIRECT, /* Direct I/O bypassing system caches (see fb-direct.c for description) */
+ FB_DIRECT, /* Direct I/O bypassing system caches (see fb-direct.c for a description) */
FB_MMAP /* Memory mapped files */
};
struct fb_params {
enum fb_type type;
- uns buffer_size;
- /* FB_STD only */
- uns keep_back_buf;
- /* FB_DIRECT only */
- uns read_ahead;
+ uns buffer_size; /* 0 for default size */
+ uns keep_back_buf; /* FB_STD: optimize for bi-directional access */
+ uns read_ahead; /* FB_DIRECT options */
uns write_back;
struct asio_queue *asio;
};
struct fastbuf *bopen_tmp_file(struct fb_params *params);
struct fastbuf *bopen_fd(int fd, struct fb_params *params);
-/* FastIO on standard files (specify buffer size 0 to enable mmaping) */
+/* FastIO on standard files (shortcuts for FB_STD) */
-struct fastbuf *bfdopen_internal(int fd, const char *name, uns buflen);
struct fastbuf *bopen(const char *name, uns mode, uns buflen);
struct fastbuf *bopen_try(const char *name, uns mode, uns buflen);
struct fastbuf *bopen_tmp(uns buflen);
struct fastbuf *bfdopen_shared(int fd, uns buflen);
void bfilesync(struct fastbuf *b);
+/* Temporary files */
+
#define TEMP_FILE_NAME_LEN 256
void temp_file_name(char *name);
+void bfix_tmp_file(struct fastbuf *fb, const char *name);
/* Internal functions of some file back-ends */
+struct fastbuf *bfdopen_internal(int fd, const char *name, uns buflen);
struct fastbuf *bfmmopen_internal(int fd, const char *name, uns mode);
extern uns fbdir_cheat;
struct asio_queue;
struct fastbuf *fbdir_open_fd_internal(int fd, const char *name, struct asio_queue *io_queue, uns buffer_size, uns read_ahead, uns write_back);
+void bclose_file_helper(struct fastbuf *f, int fd, int is_temp_file);
+
/* FastIO on in-memory streams */
struct fastbuf *fbmem_create(uns blocksize); /* Create stream and return its writing fastbuf */
/* Configuring stream parameters */
enum bconfig_type {
- BCONFIG_IS_TEMP_FILE,
- BCONFIG_KEEP_BACK_BUF,
+ BCONFIG_IS_TEMP_FILE, /* 0=normal file, 1=temporary file, 2=shared fd */
+ BCONFIG_KEEP_BACK_BUF, /* Optimize for bi-directional access */
};
int bconfig(struct fastbuf *f, uns type, int data);
void bseek(struct fastbuf *f, sh_off_t pos, int whence);
void bsetpos(struct fastbuf *f, sh_off_t pos);
void brewind(struct fastbuf *f);
-sh_off_t bfilesize(struct fastbuf *f); // -1 if not seekable
+sh_off_t bfilesize(struct fastbuf *f); /* -1 if not seekable */
static inline sh_off_t btell(struct fastbuf *f)
{