X-Git-Url: http://mj.ucw.cz/gitweb/?a=blobdiff_plain;f=lib%2Ffastbuf.h;h=b5aa567ebb72dc0213c5fb67f3b041c2fa2dc12f;hb=e34560a76a7af3fb428604e4da3cd14cfd1bf454;hp=bc7ef7eb7e492e2d3d1d25cf1fbcb9e299f0d658;hpb=e3f62ad82e2b88c52c34dcf6b769ba517e7e57f9;p=libucw.git

diff --git a/lib/fastbuf.h b/lib/fastbuf.h
index bc7ef7eb..b5aa567e 100644
--- a/lib/fastbuf.h
+++ b/lib/fastbuf.h
@@ -19,7 +19,6 @@
 #include <alloca.h>
 
 #include "lib/unaligned.h"
-#include "lib/bbuf.h"
 
 /*
  *  Generic buffered I/O. You supply hooks to be called for low-level operations
@@ -89,6 +88,9 @@ struct fastbuf *bfdopen(int fd, uns buflen);
 struct fastbuf *bfdopen_shared(int fd, uns buflen);
 void bfilesync(struct fastbuf *b);
 
+#define TEMP_FILE_NAME_LEN 256
+void temp_file_name(byte *name);
+
 /* FastIO on in-memory streams */
 
 struct fastbuf *fbmem_create(unsigned blocksize);	/* Create stream and return its writing fastbuf */
@@ -98,6 +100,14 @@ struct fastbuf *fbmem_clone_read(struct fastbuf *);	/* Create reading fastbuf */
 
 struct fastbuf *bopen_mm(byte *name, uns mode);
 
+/* FastIO on files opened with O_DIRECT (see fb-direct.c for description) */
+
+struct asio_queue;
+struct fastbuf *fbdir_open(byte *name, uns mode, struct asio_queue *io_queue);
+struct fastbuf *fbdir_open_try(byte *name, uns mode, struct asio_queue *io_queue);
+struct fastbuf *fbdir_open_fd(int fd, struct asio_queue *io_queue);
+struct fastbuf *fbdir_open_tmp(struct asio_queue *io_queue);
+
 /* FastI on file descriptors with limit */
 
 struct fastbuf *bopen_limited_fd(int fd, uns bufsize, uns limit);
@@ -118,6 +128,26 @@ struct fastbuf *fbgrow_create(unsigned basic_size);
 void fbgrow_reset(struct fastbuf *b);			/* Reset stream and prepare for writing */
 void fbgrow_rewind(struct fastbuf *b);			/* Prepare for reading */
 
+/* FastO with atomic writes for multi-threaded programs */
+
+struct fb_atomic {
+  struct fastbuf fb;
+  struct fb_atomic_file *af;
+  byte *expected_max_bptr;
+  uns slack_size;
+};
+#define FB_ATOMIC(f) ((struct fb_atomic *)(f)->is_fastbuf)
+
+struct fastbuf *fbatomic_open(byte *name, struct fastbuf *master, uns bufsize, int record_len);
+void fbatomic_internal_write(struct fastbuf *b);
+
+static inline void
+fbatomic_commit(struct fastbuf *b)
+{
+  if (b->bptr >= ((struct fb_atomic *)b)->expected_max_bptr)
+    fbatomic_internal_write(b);
+}
+
 /* Configuring stream parameters */
 
 int bconfig(struct fastbuf *f, uns type, int data);
@@ -322,11 +352,18 @@ int bgets_nodie(struct fastbuf *f, byte *b, uns l);
 byte *bgets0(struct fastbuf *f, byte *b, uns l);
 
 struct mempool;
-uns bgets_bb(struct fastbuf *f, bb_t *b);
-byte *bgets_mp(struct mempool *mp, struct fastbuf *f);
-int bgets_stk_step(struct fastbuf *f, byte *old_buf, byte *buf, uns len);
-#define bgets_stk(f) ({ struct fastbuf *_fb = (f); uns _l = 256; byte *_b, *_p = NULL; \
-	while (bgets_stk_step(_fb, _p, _b = alloca(_l), _l)) _p = _b, _l *= 2; _b; })
+struct bb_t;
+uns bgets_bb(struct fastbuf *f, struct bb_t *b, uns limit);
+byte *bgets_mp(struct fastbuf *f, struct mempool *mp);
+
+struct bgets_stk_struct {
+  struct fastbuf *f;
+  byte *old_buf, *cur_buf, *src;
+  uns old_len, cur_len, src_len;
+};
+void bgets_stk_init(struct bgets_stk_struct *s);
+void bgets_stk_step(struct bgets_stk_struct *s);
+#define bgets_stk(fb) ({ struct bgets_stk_struct _s; _s.f = (fb); for (bgets_stk_init(&_s); _s.cur_len; _s.cur_buf = alloca(_s.cur_len), bgets_stk_step(&_s)); _s.cur_buf; })
 
 static inline void
 bputs(struct fastbuf *f, byte *b)
@@ -373,7 +410,7 @@ static inline int bskip(struct fastbuf *f, uns len)
     return bskip_slow(f, len);
 }
 
-/* I/O on addr_int_t */
+/* I/O on uintptr_t */
 
 #ifdef CPU_64BIT_POINTERS
 #define bputa(x,p) bputq(x,p)