-struct fastbuf *bfdopen_internal(int fd, uns buflen, byte *name);
-struct fastbuf *bopen(byte *name, uns mode, uns buflen);
-struct fastbuf *bopen_try(byte *name, uns mode, uns buflen);
+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 a description) */
+ FB_MMAP /* Memory mapped files */
+};
+
+struct fb_params {
+ enum fb_type type;
+ 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 cf_section;
+extern struct cf_section fbpar_cf;
+extern struct fb_params fbpar_def;
+
+struct fastbuf *bopen_file(const char *name, int mode, struct fb_params *params); /* Use params==NULL for defaults */
+struct fastbuf *bopen_file_try(const char *name, int mode, struct fb_params *params);
+struct fastbuf *bopen_tmp_file(struct fb_params *params);
+struct fastbuf *bopen_fd(int fd, struct fb_params *params);
+
+/* FastIO on standard files (shortcuts for FB_STD) */
+
+struct fastbuf *bopen(const char *name, uns mode, uns buflen);
+struct fastbuf *bopen_try(const char *name, uns mode, uns buflen);