define the db->truncate function. addresses #968

git-svn-id: file:///svn/tokudb@4824 c7de825b-a66e-492c-adef-691d508d4ae1

buildheader/db.h_4_1

@@ -196,7 +196,8 @@ struct __toku_db {
   int (*put) (DB *, DB_TXN *, DBT *, DBT *, u_int32_t); /* 32-bit offset=312 size=4, 64=bit offset=528 size=8 */
   int (*remove) (DB *, const char *, const char *, u_int32_t); /* 32-bit offset=316 size=4, 64=bit offset=536 size=8 */
   int (*rename) (DB *, const char *, const char *, const char *, u_int32_t); /* 32-bit offset=320 size=4, 64=bit offset=544 size=8 */
-  void* __toku_dummy6[5];
+  int (*truncate) (DB *, DB_TXN *, u_int32_t *, u_int32_t); /* 32-bit offset=324 size=4, 64=bit offset=552 size=8 */
+  void* __toku_dummy6[4];
   int (*set_dup_compare) (DB *, int (*)(DB *, const DBT *, const DBT *)); /* 32-bit offset=344 size=4, 64=bit offset=592 size=8 */
   void* __toku_dummy7[2];
   void (*set_errfile) (DB *, FILE*); /* 32-bit offset=356 size=4, 64=bit offset=616 size=8 */

buildheader/db.h_4_3

@@ -210,7 +210,8 @@ struct __toku_db {
   int (*put) (DB *, DB_TXN *, DBT *, DBT *, u_int32_t); /* 32-bit offset=372 size=4, 64=bit offset=648 size=8 */
   int (*remove) (DB *, const char *, const char *, u_int32_t); /* 32-bit offset=376 size=4, 64=bit offset=656 size=8 */
   int (*rename) (DB *, const char *, const char *, const char *, u_int32_t); /* 32-bit offset=380 size=4, 64=bit offset=664 size=8 */
-  void* __toku_dummy8[4];
+  int (*truncate) (DB *, DB_TXN *, u_int32_t *, u_int32_t); /* 32-bit offset=384 size=4, 64=bit offset=672 size=8 */
+  void* __toku_dummy8[3];
   int (*set_dup_compare) (DB *, int (*)(DB *, const DBT *, const DBT *)); /* 32-bit offset=400 size=4, 64=bit offset=704 size=8 */
   void* __toku_dummy9[2];
   void (*set_errfile) (DB *, FILE*); /* 32-bit offset=412 size=4, 64=bit offset=728 size=8 */

buildheader/db.h_4_4

@@ -224,29 +224,31 @@ struct __toku_db {
   int (*set_pagesize) (DB *, u_int32_t); /* 32-bit offset=508 size=4, 64=bit offset=920 size=8 */
   void* __toku_dummy13[6];
   int (*stat) (DB *, void *, u_int32_t); /* 32-bit offset=536 size=4, 64=bit offset=976 size=8 */
-  void* __toku_dummy14[4];
+  void* __toku_dummy14[2];
+  int (*truncate) (DB *, DB_TXN *, u_int32_t *, u_int32_t); /* 32-bit offset=548 size=4, 64=bit offset=1000 size=8 */
+  void* __toku_dummy15[1];
   int (*verify) (DB *, const char *, const char *, FILE *, u_int32_t); /* 32-bit offset=556 size=4, 64=bit offset=1016 size=8 */
-  void* __toku_dummy15[5]; /* Padding at the end */ 
-  char __toku_dummy16[16];  /* Padding at the end */ 
+  void* __toku_dummy16[5]; /* Padding at the end */ 
+  char __toku_dummy17[16];  /* Padding at the end */ 
 };
 struct __toku_db_txn_active {
   u_int32_t txnid; /* 32-bit offset=0 size=4, 64=bit offset=0 size=4 */
-  void* __toku_dummy0[1];
-  char __toku_dummy1[12];
-  DB_LSN lsn; /* 32-bit offset=20 size=8, 64=bit offset=24 size=8 */
+  void* __toku_dummy0[2];
+  char __toku_dummy1[4];
+  DB_LSN lsn; /* 32-bit offset=16 size=8, 64=bit offset=24 size=8 */
   char __toku_dummy2[184];  /* Padding at the end */ 
 };
 struct __toku_db_txn {
   DB_ENV *mgrp /*In TokuDB, mgrp is a DB_ENV not a DB_TXNMGR*/; /* 32-bit offset=0 size=4, 64=bit offset=0 size=8 */
   struct __toku_db_txn_internal *i;
-  void* __toku_dummy0[16];
-  char __toku_dummy1[16];
-  void *api_internal; /* 32-bit offset=88 size=4, 64=bit offset=160 size=8 */
+  void* __toku_dummy0[17];
+  char __toku_dummy1[8];
+  void *api_internal; /* 32-bit offset=84 size=4, 64=bit offset=160 size=8 */
   void* __toku_dummy2[2];
-  int (*abort) (DB_TXN *); /* 32-bit offset=100 size=4, 64=bit offset=184 size=8 */
-  int (*commit) (DB_TXN*, u_int32_t); /* 32-bit offset=104 size=4, 64=bit offset=192 size=8 */
+  int (*abort) (DB_TXN *); /* 32-bit offset=96 size=4, 64=bit offset=184 size=8 */
+  int (*commit) (DB_TXN*, u_int32_t); /* 32-bit offset=100 size=4, 64=bit offset=192 size=8 */
   void* __toku_dummy3[2];
-  u_int32_t (*id) (DB_TXN *); /* 32-bit offset=116 size=4, 64=bit offset=216 size=8 */
+  u_int32_t (*id) (DB_TXN *); /* 32-bit offset=112 size=4, 64=bit offset=216 size=8 */
   void* __toku_dummy4[5]; /* Padding at the end */ 
 };
 struct __toku_db_txn_stat {

buildheader/db.h_4_5

@@ -223,10 +223,12 @@ struct __toku_db {
   int (*set_pagesize) (DB *, u_int32_t); /* 32-bit offset=520 size=4, 64=bit offset=944 size=8 */
   void* __toku_dummy13[6];
   int (*stat) (DB *, void *, u_int32_t); /* 32-bit offset=548 size=4, 64=bit offset=1000 size=8 */
-  void* __toku_dummy14[4];
+  void* __toku_dummy14[2];
+  int (*truncate) (DB *, DB_TXN *, u_int32_t *, u_int32_t); /* 32-bit offset=560 size=4, 64=bit offset=1024 size=8 */
+  void* __toku_dummy15[1];
   int (*verify) (DB *, const char *, const char *, FILE *, u_int32_t); /* 32-bit offset=568 size=4, 64=bit offset=1040 size=8 */
-  void* __toku_dummy15[5]; /* Padding at the end */ 
-  char __toku_dummy16[16];  /* Padding at the end */ 
+  void* __toku_dummy16[5]; /* Padding at the end */ 
+  char __toku_dummy17[16];  /* Padding at the end */ 
 };
 struct __toku_db_txn_active {
   u_int32_t txnid; /* 32-bit offset=0 size=4, 64=bit offset=0 size=4 */

buildheader/db.h_4_6

@@ -227,10 +227,12 @@ struct __toku_db {
   int (*set_pagesize) (DB *, u_int32_t); /* 32-bit offset=544 size=4, 64=bit offset=1000 size=8 */
   void* __toku_dummy14[7];
   int (*stat) (DB *, void *, u_int32_t); /* 32-bit offset=576 size=4, 64=bit offset=1064 size=8 */
-  void* __toku_dummy15[4];
+  void* __toku_dummy15[2];
+  int (*truncate) (DB *, DB_TXN *, u_int32_t *, u_int32_t); /* 32-bit offset=588 size=4, 64=bit offset=1088 size=8 */
+  void* __toku_dummy16[1];
   int (*verify) (DB *, const char *, const char *, FILE *, u_int32_t); /* 32-bit offset=596 size=4, 64=bit offset=1104 size=8 */
-  void* __toku_dummy16[5]; /* Padding at the end */ 
-  char __toku_dummy17[16];  /* Padding at the end */ 
+  void* __toku_dummy17[5]; /* Padding at the end */ 
+  char __toku_dummy18[16];  /* Padding at the end */ 
 };
 struct __toku_db_txn_active {
   u_int32_t txnid; /* 32-bit offset=0 size=4, 64=bit offset=0 size=4 */

buildheader/sample_offsets.c

@@ -149,6 +149,7 @@ void sample_db_offsets (void) {
     STRUCT_SETUP(DB, set_flags,      "int (*%s) (DB *, u_int32_t)");
     STRUCT_SETUP(DB, set_pagesize,   "int (*%s) (DB *, u_int32_t)");
     STRUCT_SETUP(DB, stat,           "int (*%s) (DB *, void *, u_int32_t)");
+    STRUCT_SETUP(DB, truncate,       "int (*%s) (DB *, DB_TXN *, u_int32_t *, u_int32_t)");
     STRUCT_SETUP(DB, verify,         "int (*%s) (DB *, const char *, const char *, FILE *, u_int32_t)");
     sort_and_dump_fields("db", sizeof(DB));
 }

buildheader/sample_offsets_32_4_1.h

@@ -59,6 +59,7 @@ struct fieldinfo db_fields32[] = {
   {"int (*put) (DB *, DB_TXN *, DBT *, DBT *, u_int32_t)", 312, 4},
   {"int (*remove) (DB *, const char *, const char *, u_int32_t)", 316, 4},
   {"int (*rename) (DB *, const char *, const char *, const char *, u_int32_t)", 320, 4},
+  {"int (*truncate) (DB *, DB_TXN *, u_int32_t *, u_int32_t)", 324, 4},
   {"int (*set_dup_compare) (DB *, int (*)(DB *, const DBT *, const DBT *))", 344, 4},
   {"void (*set_errfile) (DB *, FILE*)", 356, 4},
   {"int (*set_flags) (DB *, u_int32_t)", 368, 4},

buildheader/sample_offsets_32_4_3.h

@@ -65,6 +65,7 @@ struct fieldinfo db_fields32[] = {
   {"int (*put) (DB *, DB_TXN *, DBT *, DBT *, u_int32_t)", 372, 4},
   {"int (*remove) (DB *, const char *, const char *, u_int32_t)", 376, 4},
   {"int (*rename) (DB *, const char *, const char *, const char *, u_int32_t)", 380, 4},
+  {"int (*truncate) (DB *, DB_TXN *, u_int32_t *, u_int32_t)", 384, 4},
   {"int (*set_dup_compare) (DB *, int (*)(DB *, const DBT *, const DBT *))", 400, 4},
   {"void (*set_errfile) (DB *, FILE*)", 412, 4},
   {"int (*set_flags) (DB *, u_int32_t)", 424, 4},

buildheader/sample_offsets_32_4_4.h

@@ -71,21 +71,22 @@ struct fieldinfo db_fields32[] = {
   {"int (*set_flags) (DB *, u_int32_t)", 480, 4},
   {"int (*set_pagesize) (DB *, u_int32_t)", 508, 4},
   {"int (*stat) (DB *, void *, u_int32_t)", 536, 4},
+  {"int (*truncate) (DB *, DB_TXN *, u_int32_t *, u_int32_t)", 548, 4},
   {"int (*verify) (DB *, const char *, const char *, FILE *, u_int32_t)", 556, 4},
   {0, 596, 596} /* size of whole struct */
 };
 struct fieldinfo db_txn_active_fields32[] = {
   {"u_int32_t txnid", 0, 4},
-  {"DB_LSN lsn", 20, 8},
-  {0, 212, 212} /* size of whole struct */
+  {"DB_LSN lsn", 16, 8},
+  {0, 208, 208} /* size of whole struct */
 };
 struct fieldinfo db_txn_fields32[] = {
   {"DB_ENV *mgrp /*In TokuDB, mgrp is a DB_ENV not a DB_TXNMGR*/", 0, 4},
-  {"void *api_internal", 88, 4},
-  {"int (*abort) (DB_TXN *)", 100, 4},
-  {"int (*commit) (DB_TXN*, u_int32_t)", 104, 4},
-  {"u_int32_t (*id) (DB_TXN *)", 116, 4},
-  {0, 140, 140} /* size of whole struct */
+  {"void *api_internal", 84, 4},
+  {"int (*abort) (DB_TXN *)", 96, 4},
+  {"int (*commit) (DB_TXN*, u_int32_t)", 100, 4},
+  {"u_int32_t (*id) (DB_TXN *)", 112, 4},
+  {0, 136, 136} /* size of whole struct */
 };
 struct fieldinfo db_txn_stat_fields32[] = {
   {"u_int32_t st_nactive", 32, 4},

buildheader/sample_offsets_32_4_5.h

@@ -70,6 +70,7 @@ struct fieldinfo db_fields32[] = {
   {"int (*set_flags) (DB *, u_int32_t)", 492, 4},
   {"int (*set_pagesize) (DB *, u_int32_t)", 520, 4},
   {"int (*stat) (DB *, void *, u_int32_t)", 548, 4},
+  {"int (*truncate) (DB *, DB_TXN *, u_int32_t *, u_int32_t)", 560, 4},
   {"int (*verify) (DB *, const char *, const char *, FILE *, u_int32_t)", 568, 4},
   {0, 608, 608} /* size of whole struct */
 };

buildheader/sample_offsets_32_4_6.h

@@ -70,6 +70,7 @@ struct fieldinfo db_fields32[] = {
   {"int (*set_flags) (DB *, u_int32_t)", 512, 4},
   {"int (*set_pagesize) (DB *, u_int32_t)", 544, 4},
   {"int (*stat) (DB *, void *, u_int32_t)", 576, 4},
+  {"int (*truncate) (DB *, DB_TXN *, u_int32_t *, u_int32_t)", 588, 4},
   {"int (*verify) (DB *, const char *, const char *, FILE *, u_int32_t)", 596, 4},
   {0, 636, 636} /* size of whole struct */
 };

buildheader/sample_offsets_64_4_1.h

@@ -59,6 +59,7 @@ struct fieldinfo db_fields64[] = {
   {"int (*put) (DB *, DB_TXN *, DBT *, DBT *, u_int32_t)", 528, 8},
   {"int (*remove) (DB *, const char *, const char *, u_int32_t)", 536, 8},
   {"int (*rename) (DB *, const char *, const char *, const char *, u_int32_t)", 544, 8},
+  {"int (*truncate) (DB *, DB_TXN *, u_int32_t *, u_int32_t)", 552, 8},
   {"int (*set_dup_compare) (DB *, int (*)(DB *, const DBT *, const DBT *))", 592, 8},
   {"void (*set_errfile) (DB *, FILE*)", 616, 8},
   {"int (*set_flags) (DB *, u_int32_t)", 640, 8},

buildheader/sample_offsets_64_4_3.h

@@ -65,6 +65,7 @@ struct fieldinfo db_fields64[] = {
   {"int (*put) (DB *, DB_TXN *, DBT *, DBT *, u_int32_t)", 648, 8},
   {"int (*remove) (DB *, const char *, const char *, u_int32_t)", 656, 8},
   {"int (*rename) (DB *, const char *, const char *, const char *, u_int32_t)", 664, 8},
+  {"int (*truncate) (DB *, DB_TXN *, u_int32_t *, u_int32_t)", 672, 8},
   {"int (*set_dup_compare) (DB *, int (*)(DB *, const DBT *, const DBT *))", 704, 8},
   {"void (*set_errfile) (DB *, FILE*)", 728, 8},
   {"int (*set_flags) (DB *, u_int32_t)", 752, 8},

buildheader/sample_offsets_64_4_4.h

@@ -71,6 +71,7 @@ struct fieldinfo db_fields64[] = {
   {"int (*set_flags) (DB *, u_int32_t)", 864, 8},
   {"int (*set_pagesize) (DB *, u_int32_t)", 920, 8},
   {"int (*stat) (DB *, void *, u_int32_t)", 976, 8},
+  {"int (*truncate) (DB *, DB_TXN *, u_int32_t *, u_int32_t)", 1000, 8},
   {"int (*verify) (DB *, const char *, const char *, FILE *, u_int32_t)", 1016, 8},
   {0, 1080, 1080} /* size of whole struct */
 };

buildheader/sample_offsets_64_4_5.h

@@ -70,6 +70,7 @@ struct fieldinfo db_fields64[] = {
   {"int (*set_flags) (DB *, u_int32_t)", 888, 8},
   {"int (*set_pagesize) (DB *, u_int32_t)", 944, 8},
   {"int (*stat) (DB *, void *, u_int32_t)", 1000, 8},
+  {"int (*truncate) (DB *, DB_TXN *, u_int32_t *, u_int32_t)", 1024, 8},
   {"int (*verify) (DB *, const char *, const char *, FILE *, u_int32_t)", 1040, 8},
   {0, 1104, 1104} /* size of whole struct */
 };

buildheader/sample_offsets_64_4_6.h

@@ -70,6 +70,7 @@ struct fieldinfo db_fields64[] = {
   {"int (*set_flags) (DB *, u_int32_t)", 936, 8},
   {"int (*set_pagesize) (DB *, u_int32_t)", 1000, 8},
   {"int (*stat) (DB *, void *, u_int32_t)", 1064, 8},
+  {"int (*truncate) (DB *, DB_TXN *, u_int32_t *, u_int32_t)", 1088, 8},
   {"int (*verify) (DB *, const char *, const char *, FILE *, u_int32_t)", 1104, 8},
   {0, 1168, 1168} /* size of whole struct */
 };

include/db.h

@@ -224,29 +224,31 @@ struct __toku_db {
   int (*set_pagesize) (DB *, u_int32_t); /* 32-bit offset=508 size=4, 64=bit offset=920 size=8 */
   void* __toku_dummy13[6];
   int (*stat) (DB *, void *, u_int32_t); /* 32-bit offset=536 size=4, 64=bit offset=976 size=8 */
-  void* __toku_dummy14[4];
+  void* __toku_dummy14[2];
+  int (*truncate) (DB *, DB_TXN *, u_int32_t *, u_int32_t); /* 32-bit offset=548 size=4, 64=bit offset=1000 size=8 */
+  void* __toku_dummy15[1];
   int (*verify) (DB *, const char *, const char *, FILE *, u_int32_t); /* 32-bit offset=556 size=4, 64=bit offset=1016 size=8 */
-  void* __toku_dummy15[5]; /* Padding at the end */ 
-  char __toku_dummy16[16];  /* Padding at the end */ 
+  void* __toku_dummy16[5]; /* Padding at the end */ 
+  char __toku_dummy17[16];  /* Padding at the end */ 
 };
 struct __toku_db_txn_active {
   u_int32_t txnid; /* 32-bit offset=0 size=4, 64=bit offset=0 size=4 */
-  void* __toku_dummy0[1];
-  char __toku_dummy1[12];
-  DB_LSN lsn; /* 32-bit offset=20 size=8, 64=bit offset=24 size=8 */
+  void* __toku_dummy0[2];
+  char __toku_dummy1[4];
+  DB_LSN lsn; /* 32-bit offset=16 size=8, 64=bit offset=24 size=8 */
   char __toku_dummy2[184];  /* Padding at the end */ 
 };
 struct __toku_db_txn {
   DB_ENV *mgrp /*In TokuDB, mgrp is a DB_ENV not a DB_TXNMGR*/; /* 32-bit offset=0 size=4, 64=bit offset=0 size=8 */
   struct __toku_db_txn_internal *i;
-  void* __toku_dummy0[16];
-  char __toku_dummy1[16];
-  void *api_internal; /* 32-bit offset=88 size=4, 64=bit offset=160 size=8 */
+  void* __toku_dummy0[17];
+  char __toku_dummy1[8];
+  void *api_internal; /* 32-bit offset=84 size=4, 64=bit offset=160 size=8 */
   void* __toku_dummy2[2];
-  int (*abort) (DB_TXN *); /* 32-bit offset=100 size=4, 64=bit offset=184 size=8 */
-  int (*commit) (DB_TXN*, u_int32_t); /* 32-bit offset=104 size=4, 64=bit offset=192 size=8 */
+  int (*abort) (DB_TXN *); /* 32-bit offset=96 size=4, 64=bit offset=184 size=8 */
+  int (*commit) (DB_TXN*, u_int32_t); /* 32-bit offset=100 size=4, 64=bit offset=192 size=8 */
   void* __toku_dummy3[2];
-  u_int32_t (*id) (DB_TXN *); /* 32-bit offset=116 size=4, 64=bit offset=216 size=8 */
+  u_int32_t (*id) (DB_TXN *); /* 32-bit offset=112 size=4, 64=bit offset=216 size=8 */
   void* __toku_dummy4[5]; /* Padding at the end */ 
 };
 struct __toku_db_txn_stat {