lib: added {big,page}_alloc_zero routines

[libucw.git] / lib / sorter / common.h

diff --git a/lib/sorter/common.h b/lib/sorter/common.h
index 9747a5e082fec181276af6c29e29e74fdef8b482..60c6db98ceb8c63185df0922b25faacbedede4fd 100644 (file)
--- a/lib/sorter/common.h
+++ b/lib/sorter/common.h
@@ -14,48 +14,100 @@
 
 /* Configuration, some of the variables are used by the old sorter, too. */
 extern uns sorter_trace, sorter_presort_bufsize, sorter_stream_bufsize;
+extern uns sorter_debug, sorter_min_radix_bits, sorter_max_radix_bits;
+extern u64 sorter_bufsize;
+extern struct fb_params sorter_fb_params;
 
-struct sort_bucket {
-  cnode n;
-  uns flags;
-  struct fastbuf *fb;
-  byte *name;
-  u64 size;                            // Size in bytes
-  uns runs;                            // Number of runs, 0 if unknown
-  uns hash_bits;                       // Remaining bits of the hash function
-  byte *ident;                         // Identifier used in debug messages
-};
+#define SORT_TRACE(x...) do { if (sorter_trace) log(L_DEBUG, x); } while(0)
+#define SORT_XTRACE(level, x...) do { if (sorter_trace >= level) log(L_DEBUG, x); } while(0)
 
-enum sort_bucket_flags {
-  SBF_FINAL = 1,                       // This bucket corresponds to the final output file
-  SBF_SOURCE = 2,                      // Contains the source file
+enum sort_debug {
+  SORT_DEBUG_NO_PRESORT = 1,
+  SORT_DEBUG_NO_JOIN = 2,
+  SORT_DEBUG_KEEP_BUCKETS = 4,
+  SORT_DEBUG_NO_RADIX = 8,
 };
 
+struct sort_bucket;
+
 struct sort_context {
   struct fastbuf *in_fb;
   struct fastbuf *out_fb;
   uns hash_bits;
+  u64 in_size;
 
   struct mempool *pool;
   clist bucket_list;
-  byte *big_buf, *big_buf_half;
-  uns big_buf_size, big_buf_half_size;
+  void *big_buf;
+  size_t big_buf_size;
+
+  int (*custom_presort)(struct fastbuf *dest, void *buf, size_t bufsize);
 
-  struct fastbuf *(*custom_presort)(void);
   // Take as much as possible from the source bucket, sort it in memory and dump to destination bucket.
   // Return 1 if there is more data available in the source bucket.
-  int (*internal_sort)(struct sort_context *ctx, struct sort_bucket *in, struct sort_bucket *out);
+  int (*internal_sort)(struct sort_context *ctx, struct sort_bucket *in, struct sort_bucket *out, struct sort_bucket *out_only);
+
+  // Estimate how much input data from `b' will fit in the internal sorting buffer.
+  u64 (*internal_estimate)(struct sort_context *ctx, struct sort_bucket *b);
+
   // Two-way split/merge: merge up to 2 source buckets to up to 2 destination buckets.
   // Bucket arrays are NULL-terminated.
   void (*twoway_merge)(struct sort_context *ctx, struct sort_bucket **ins, struct sort_bucket **outs);
+
+  // Radix split according to hash function
+  void (*radix_split)(struct sort_context *ctx, struct sort_bucket *in, struct sort_bucket **outs, uns bitpos, uns numbits);
+
+  // State variables of internal_sort
+  void *key_buf;
+  int more_keys;
+
+  // Timing
+  timestamp_t start_time;
+  uns last_pass_time;
+  uns total_int_time, total_pre_time, total_ext_time;
 };
 
 void sorter_run(struct sort_context *ctx);
 
-struct sort_bucket *sorter_new_bucket(struct sort_context *ctx);
-struct fastbuf *sorter_open_read(struct sort_bucket *b);
-struct fastbuf *sorter_open_write(struct sort_bucket *b);
-void sorter_close_read(struct sort_bucket *b);
-void sorter_close_write(struct sort_bucket *b);
+/* Buffers */
+
+void *sorter_alloc(struct sort_context *ctx, uns size);
+void sorter_prepare_buf(struct sort_context *ctx);
+void sorter_alloc_buf(struct sort_context *ctx);
+void sorter_free_buf(struct sort_context *ctx);
+
+/* Buckets */
+
+struct sort_bucket {
+  cnode n;
+  struct sort_context *ctx;
+  uns flags;
+  struct fastbuf *fb;
+  byte *filename;
+  u64 size;                            // Size in bytes (not valid when writing)
+  uns runs;                            // Number of runs, 0 if not sorted
+  uns hash_bits;                       // Remaining bits of the hash function
+  byte *ident;                         // Identifier used in debug messages
+};
+
+enum sort_bucket_flags {
+  SBF_FINAL = 1,                       // This bucket corresponds to the final output file (always 1 run)
+  SBF_SOURCE = 2,                      // Contains the source file (always 0 runs)
+  SBF_CUSTOM_PRESORT = 4,              // Contains source to read via custom presorter
+  SBF_OPEN_WRITE = 256,                        // We are currently writing to the fastbuf
+  SBF_OPEN_READ = 512,                 // We are reading from the fastbuf
+  SBF_DESTROYED = 1024,                        // Already done with, no further references allowed
+  SBF_SWAPPED_OUT = 2048,              // Swapped out to a named file
+};
+
+struct sort_bucket *sbuck_new(struct sort_context *ctx);
+void sbuck_drop(struct sort_bucket *b);
+int sbuck_have(struct sort_bucket *b);
+int sbuck_has_file(struct sort_bucket *b);
+sh_off_t sbuck_size(struct sort_bucket *b);
+struct fastbuf *sbuck_read(struct sort_bucket *b);
+struct fastbuf *sbuck_write(struct sort_bucket *b);
+void sbuck_swap_out(struct sort_bucket *b);
+void format_size(byte *buf, u64 x);
 
 #endif