Merge chilla.local:/home/mydev/mysql-4.1-bug8283-one

into  chilla.local:/home/mydev/mysql-5.0-bug8283


include/my_sys.h:
  Auto merged
include/myisam.h:
  Auto merged
myisam/mi_check.c:
  Auto merged
myisam/mi_open.c:
  Auto merged
myisam/mi_packrec.c:
  Auto merged
myisam/sort.c:
  Auto merged
mysql-test/t/myisam.test:
  Auto merged
myisam/myisamdef.h:
  Bug#8283 - OPTIMIZE TABLE causes data loss
  Merge from 4.1
mysql-test/r/myisam.result:
  Bug#8283 - OPTIMIZE TABLE causes data loss
  Merge from 4.1
mysys/mf_iocache.c:
  Bug#8283 - OPTIMIZE TABLE causes data loss
  Merge from 4.1

2 files changed, 15 insertions, 9 deletions

diff --git a/include/my_sys.h b/include/my_sys.h
index 9b283ace029..92662b75e8e 100644
--- a/include/my_sys.h
+++ b/include/my_sys.h
@@ -351,12 +351,18 @@ typedef int (*IO_CACHE_CALLBACK)(struct st_io_cache*);
 #ifdef THREAD
 typedef struct st_io_cache_share
 {
-  /* to sync on reads into buffer */
-  pthread_mutex_t mutex;
-  pthread_cond_t  cond;
-  int             count, total;
-  /* actual IO_CACHE that filled the buffer */
-  struct st_io_cache *active;
+  pthread_mutex_t       mutex;           /* To sync on reads into buffer. */
+  pthread_cond_t        cond;            /* To wait for signals. */
+  pthread_cond_t        cond_writer;     /* For a synchronized writer. */
+  /* Offset in file corresponding to the first byte of buffer. */
+  my_off_t              pos_in_file;
+  /* If a synchronized write cache is the source of the data. */
+  struct st_io_cache    *source_cache;
+  byte                  *buffer;         /* The read buffer. */
+  byte                  *read_end;       /* Behind last valid byte of buffer. */
+  int                   running_threads; /* threads not in lock. */
+  int                   total_threads;   /* threads sharing the cache. */
+  int                   error;           /* Last error. */
 #ifdef NOT_YET_IMPLEMENTED
   /* whether the structure should be free'd */
   my_bool alloced;
@@ -720,8 +726,8 @@ extern void setup_io_cache(IO_CACHE* info);
 extern int _my_b_read(IO_CACHE *info,byte *Buffer,uint Count);
 #ifdef THREAD
 extern int _my_b_read_r(IO_CACHE *info,byte *Buffer,uint Count);
-extern void init_io_cache_share(IO_CACHE *info,
-				IO_CACHE_SHARE *s, uint num_threads);
+extern void init_io_cache_share(IO_CACHE *read_cache, IO_CACHE_SHARE *cshare,
+                                IO_CACHE *write_cache, uint num_threads);
 extern void remove_io_thread(IO_CACHE *info);
 #endif
 extern int _my_b_seq_read(IO_CACHE *info,byte *Buffer,uint Count);
diff --git a/include/myisam.h b/include/myisam.h
index 321952dcf4c..95852366251 100644
--- a/include/myisam.h
+++ b/include/myisam.h
@@ -419,7 +419,7 @@ typedef struct st_mi_check_param
   uint testflag, key_cache_block_size;
   uint8 language;
   my_bool using_global_keycache, opt_lock_memory, opt_follow_links;
-  my_bool retry_repair, force_sort, calc_checksum;
+  my_bool retry_repair, force_sort;
   char temp_filename[FN_REFLEN],*isam_file_name;
   MY_TMPDIR *tmpdir;
   int tmpfile_createflag;