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NdbInterpretedCode.cpp
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1196 lines (1015 loc) · 30.9 KB
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/*
Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <ndb_global.h>
#include "NdbInterpretedCode.hpp"
#include "Interpreter.hpp"
#include "NdbDictionaryImpl.hpp"
/*
ToDo: We should add placeholders to this, so that one can use a single
InterpretedCode object to create many operations from different embedded
constants. Once we do this, we could add more error checks, as the cost
would then not be paid for each operation creation.
Suggest that fixed-size constants are replaced inline with latest values
using instruction checking prior to send and new 'virtual' instructions
which are resolved to real instructions at send time. This requires a new
interface to send parts of code, parts of placeholders and parts of other
words.
Var-sized constants can be used via a new branch_attr_op_arg instruction and
use of some space in the subroutine section to store the constants.
Wait for good use-case for placeholders. Best currently is conflict detection,
but the conflict detection programs are very short, so perhaps it's not
worthwhile.
*/
NdbInterpretedCode::NdbInterpretedCode(const NdbDictionary::Table *table,
Uint32 *buffer, Uint32 buffer_word_size) :
m_table_impl(0),
m_buffer(buffer),
m_buffer_length(buffer_word_size),
m_internal_buffer(0),
m_number_of_labels(0),
m_number_of_subs(0),
m_number_of_calls(0),
m_last_meta_pos(m_buffer_length),
m_instructions_length(0),
m_first_sub_instruction_pos(0),
m_available_length(m_buffer_length),
m_flags(0)
{
if (table != NULL)
m_table_impl= & NdbTableImpl::getImpl(*table);
m_error.code= 0;
}
NdbInterpretedCode::~NdbInterpretedCode()
{
if (m_internal_buffer != NULL)
{
delete [] m_internal_buffer;
}
}
int
NdbInterpretedCode::error(Uint32 code)
{
m_flags|= GotError;
m_error.code= code;
return -1;
}
/* Make sure there's space for the number of words
* specified between the end of the code and the
* start of the meta information or return false.
* This method dynamically doubles the internal buffer
* length if the caller did not supply a buffer.
*/
bool
NdbInterpretedCode::have_space_for(Uint32 wordsRequired)
{
assert(m_last_meta_pos <= m_buffer_length);
assert(m_last_meta_pos >= m_instructions_length);
assert(m_available_length == m_last_meta_pos - m_instructions_length);
if (likely(m_available_length >= wordsRequired))
return true;
if ((m_internal_buffer != NULL) || (m_buffer_length == 0))
{
Uint32 newSize= m_buffer_length;
const Uint32 extraRequired= wordsRequired - m_available_length;
/* Initial allocation of dynamic buffer */
if (newSize == 0)
newSize= 1;
do {
/* Double buffer length until there's enough space, or
* we reach the maximum size
*/
newSize= newSize << 1;
} while (((newSize - m_buffer_length) < extraRequired) &&
(newSize < MaxDynamicBufSize));
if (newSize > MaxDynamicBufSize)
newSize= MaxDynamicBufSize;
/* Were we able to get enough extra space? */
if ((newSize - m_buffer_length) >= extraRequired)
{
Uint32 *newBuf= new Uint32[ newSize ];
if (newBuf != NULL)
{
Uint32 metaInfoWords= m_buffer_length - m_last_meta_pos;
Uint32 newLastMetaInfoPos= newSize - metaInfoWords;
if (m_buffer_length > 0)
{
/* Copy instruction words to start of new buffer */
memcpy(newBuf, m_internal_buffer, m_instructions_length << 2);
/* Copy metainfo words to end of new buffer */
memcpy(&newBuf[ newLastMetaInfoPos ],
&m_buffer[ m_last_meta_pos ],
metaInfoWords << 2);
delete [] m_internal_buffer;
}
m_buffer= m_internal_buffer= newBuf;
m_available_length+= (newSize - m_buffer_length);
m_buffer_length= newSize;
m_last_meta_pos= newLastMetaInfoPos;
return true;
}
}
}
return false;
}
inline int
NdbInterpretedCode::add1(Uint32 x1)
{
if (unlikely(! have_space_for(1)))
return error(TooManyInstructions);
Uint32 current = m_instructions_length;
m_buffer[current ] = x1;
m_instructions_length = current + 1;
m_available_length--;
return 0;
}
inline int
NdbInterpretedCode::add2(Uint32 x1, Uint32 x2)
{
if (unlikely(! have_space_for(2)))
return error(TooManyInstructions);
Uint32 current = m_instructions_length;
m_buffer[current ] = x1;
m_buffer[current + 1] = x2;
m_instructions_length = current + 2;
m_available_length-= 2;
return 0;
}
inline int
NdbInterpretedCode::add3(Uint32 x1, Uint32 x2, Uint32 x3)
{
if (unlikely(! have_space_for(3)))
return error(TooManyInstructions);
Uint32 current = m_instructions_length;
m_buffer[current ] = x1;
m_buffer[current + 1] = x2;
m_buffer[current + 2] = x3;
m_instructions_length = current + 3;
m_available_length-= 3;
return 0;
}
inline int
NdbInterpretedCode::addN(Uint32 *data, Uint32 length)
{
if (unlikely(! have_space_for(length)))
return error(TooManyInstructions);
/* data* may be unaligned, so we do a byte copy
* using memcpy
*/
memcpy(&m_buffer[m_instructions_length],
data,
length << 2);
m_instructions_length+= length;
m_available_length-= length;
return 0;
}
inline int
NdbInterpretedCode::addMeta(CodeMetaInfo& info)
{
if (unlikely(! have_space_for(CODEMETAINFO_WORDS)))
return error(TooManyInstructions);
m_buffer[--m_last_meta_pos]= (Uint32)info.number << 16 | info.type;
m_buffer[--m_last_meta_pos]= info.firstInstrPos;
m_available_length-= CODEMETAINFO_WORDS;
return 0;
}
int
NdbInterpretedCode::add_reg(Uint32 RegDest,
Uint32 RegSource1, Uint32 RegSource2)
{
return add1(Interpreter::Add(RegDest % MaxReg, RegSource1 % MaxReg,
RegSource2 % MaxReg));
}
int
NdbInterpretedCode::sub_reg(Uint32 RegDest,
Uint32 RegSource1, Uint32 RegSource2)
{
return add1(Interpreter::Sub(RegDest % MaxReg, RegSource1 % MaxReg,
RegSource2 % MaxReg));
}
int
NdbInterpretedCode::load_const_u32(Uint32 RegDest, Uint32 Constant)
{
return add2(Interpreter::LoadConst32(RegDest % MaxReg), Constant);
}
int
NdbInterpretedCode::load_const_u64(Uint32 RegDest, Uint64 Constant)
{
union {
Uint64 val64;
Uint32 val32[2];
};
val64 = Constant;
return add3(Interpreter::LoadConst64(RegDest % MaxReg), val32[0], val32[1]);
}
int
NdbInterpretedCode::load_const_null(Uint32 RegDest)
{
return add1(Interpreter::LoadNull(RegDest % MaxReg));
}
int
NdbInterpretedCode::load_const_u16(Uint32 RegDest, Uint32 Constant)
{
return add1(Interpreter::LoadConst16((RegDest % MaxReg), Constant));
}
int
NdbInterpretedCode::read_attr_impl(const NdbColumnImpl *c, Uint32 RegDest)
{
if (c->m_storageType == NDB_STORAGETYPE_DISK)
m_flags|= UsesDisk;
return add1(Interpreter::Read(c->m_attrId, RegDest % MaxReg));
}
int
NdbInterpretedCode::read_attr(Uint32 RegDest, Uint32 attrId)
{
if (unlikely(m_table_impl == NULL))
/* NdbInterpretedCode instruction requires that table is set */
return error(4538);
const NdbColumnImpl *c= m_table_impl->getColumn(attrId);
if (unlikely(c == NULL))
return error(BadAttributeId);
return read_attr_impl(c, RegDest);
}
int
NdbInterpretedCode::read_attr(Uint32 RegDest,
const NdbDictionary::Column *column)
{
if (unlikely(m_table_impl == NULL))
/* NdbInterpretedCode instruction requires that table is set */
return error(4538);
// TODO : Check column is from the correct table
return read_attr_impl(&NdbColumnImpl::getImpl(*column), RegDest);
}
int
NdbInterpretedCode::write_attr_impl(const NdbColumnImpl *c, Uint32 RegSource)
{
if (c->m_storageType == NDB_STORAGETYPE_DISK)
m_flags|= UsesDisk;
return add1(Interpreter::Write(c->m_attrId, RegSource % MaxReg));
}
int
NdbInterpretedCode::write_attr(Uint32 attrId, Uint32 RegSource)
{
if (unlikely(m_table_impl == NULL))
/* NdbInterpretedCode instruction requires that table is set */
return error(4538);
const NdbColumnImpl *c= m_table_impl->getColumn(attrId);
if (unlikely(c == NULL))
return error(BadAttributeId);
return write_attr_impl(c, RegSource);
}
int
NdbInterpretedCode::write_attr(const NdbDictionary::Column *column,
Uint32 RegSource)
{
if (unlikely(m_table_impl == NULL))
/* NdbInterpretedCode instruction requires that table is set */
return error(4538);
// TODO : Check column is from the right table
return write_attr_impl(&NdbColumnImpl::getImpl(*column), RegSource);
}
int
NdbInterpretedCode::def_label(int LabelNum)
{
if (LabelNum < 0 ||
(Uint32)LabelNum > MaxLabels)
return error(BadLabelNum);
m_number_of_labels++;
CodeMetaInfo info;
info.type= Label;
info.number= LabelNum;
info.firstInstrPos= m_instructions_length;
// Note, no check for whether the label's already defined here.
return addMeta(info);
}
int
NdbInterpretedCode::add_branch(Uint32 instruction, Uint32 Label)
{
/* We store the instruction with the label as the offset
* rather than the correct offset.
* This is corrected at finalise() time when we know
* the correct offset for the code
*/
if (unlikely(Label > 0xffff))
return error(BranchToBadLabel);
return add1(instruction | Label << 16);
}
int
NdbInterpretedCode::branch_label(Uint32 Label)
{
return add_branch(Interpreter::BRANCH, Label);
}
/* For the following inequalities, the order of the
* registers passed to Interpreter::Branch is reversed
* to correct the reordering done in Interpreter::Branch
* This ensures that the comparison is Lvalue <cond> Rvalue,
* not Rvalue <cond> Lvalue.
*/
int
NdbInterpretedCode::branch_ge(Uint32 RegLvalue, Uint32 RegRvalue,
Uint32 Label)
{
Uint32 instr = Interpreter::Branch(Interpreter::BRANCH_GE_REG_REG,
RegRvalue, RegLvalue);
return add_branch(instr, Label);
}
int
NdbInterpretedCode::branch_gt(Uint32 RegLvalue, Uint32 RegRvalue,
Uint32 Label)
{
Uint32 instr = Interpreter::Branch(Interpreter::BRANCH_GT_REG_REG,
RegRvalue, RegLvalue);
return add_branch(instr, Label);
}
int
NdbInterpretedCode::branch_le(Uint32 RegLvalue, Uint32 RegRvalue,
Uint32 Label)
{
Uint32 instr = Interpreter::Branch(Interpreter::BRANCH_LE_REG_REG,
RegRvalue, RegLvalue);
return add_branch(instr, Label);
}
int
NdbInterpretedCode::branch_lt(Uint32 RegLvalue, Uint32 RegRvalue,
Uint32 Label)
{
Uint32 instr = Interpreter::Branch(Interpreter::BRANCH_LT_REG_REG,
RegRvalue, RegLvalue);
return add_branch(instr, Label);
}
int
NdbInterpretedCode::branch_eq(Uint32 RegLvalue, Uint32 RegRvalue,
Uint32 Label)
{
Uint32 instr = Interpreter::Branch(Interpreter::BRANCH_EQ_REG_REG,
RegLvalue, RegRvalue);
return add_branch(instr, Label);
}
int
NdbInterpretedCode::branch_ne(Uint32 RegLvalue, Uint32 RegRvalue,
Uint32 Label)
{
Uint32 instr = Interpreter::Branch(Interpreter::BRANCH_NE_REG_REG,
RegLvalue, RegRvalue);
return add_branch(instr, Label);
}
int
NdbInterpretedCode::branch_ne_null(Uint32 RegLvalue, Uint32 Label)
{
return add_branch
(((RegLvalue % MaxReg) << 6) | Interpreter::BRANCH_REG_NE_NULL, Label);
}
int
NdbInterpretedCode::branch_eq_null(Uint32 RegLvalue, Uint32 Label)
{
return add_branch
(((RegLvalue % MaxReg) << 6) | Interpreter::BRANCH_REG_EQ_NULL, Label);
}
int
NdbInterpretedCode::branch_col_eq_null(Uint32 attrId, Uint32 Label)
{
int res= 0;
if (unlikely(m_table_impl == NULL))
/* NdbInterpretedCode instruction requires that table is set */
return error(4538);
const NdbColumnImpl *c= m_table_impl->getColumn(attrId);
if (unlikely(c == NULL))
return error(BadAttributeId);
if (c->m_storageType == NDB_STORAGETYPE_DISK)
m_flags|= UsesDisk;
/* Add instruction and branch label */
if ((res= add_branch(Interpreter::BRANCH_ATTR_EQ_NULL, Label)) !=0)
return res;
/* Add attrId with no length */
return add1(Interpreter::BranchCol_2(attrId));
}
int
NdbInterpretedCode::branch_col_ne_null(Uint32 attrId, Uint32 Label)
{
int res= 0;
if (unlikely(m_table_impl == NULL))
/* NdbInterpretedCode instruction requires that table is set */
return error(4538);
const NdbColumnImpl *c= m_table_impl->getColumn(attrId);
if (unlikely(c == NULL))
return error(BadAttributeId);
if (c->m_storageType == NDB_STORAGETYPE_DISK)
m_flags|= UsesDisk;
/* Add instruction and branch label */
if ((res= add_branch(Interpreter::BRANCH_ATTR_NE_NULL, Label)) !=0)
return res;
/* Add attrId with no length */
return add1(Interpreter::BranchCol_2(attrId));
}
int
NdbInterpretedCode::branch_col(Uint32 branch_type,
Uint32 attrId,
const void * val,
Uint32 len,
Uint32 Label)
{
DBUG_ENTER("NdbInterpretedCode::branch_col");
DBUG_PRINT("enter", ("type: %u col:%u val: 0x%lx len: %u label: %u",
branch_type, attrId, (long) val, len, Label));
if (val != NULL)
DBUG_DUMP("value", (uchar*)val, len);
else
DBUG_PRINT("info", ("value == NULL"));
Interpreter::BinaryCondition c=
(Interpreter::BinaryCondition)branch_type;
if (unlikely(m_table_impl == NULL))
/* NdbInterpretedCode instruction requires that table is set */
DBUG_RETURN(error(4538));
const NdbColumnImpl * col =
m_table_impl->getColumn(attrId);
if(col == NULL){
DBUG_RETURN(error(BadAttributeId));
}
Uint32 lastWordMask= ~0;
if (val == NULL)
len = 0;
else {
if (! col->getStringType())
{
/* Fixed size type */
if (col->getType() == NDB_TYPE_BIT)
{
/* We want to zero out insignificant bits in the
* last word of a bit type
*/
Uint32 bitLen= col->getLength();
Uint32 lastWordBits= bitLen & 0x1F;
if (lastWordBits)
lastWordMask= (1 << lastWordBits) -1;
}
len= col->m_attrSize * col->m_arraySize;
}
else
{
/* For Like and Not like we must use the passed in
* length. Otherwise we use the length encoded
* in the passed string
*/
if ((branch_type != Interpreter::LIKE) &&
(branch_type != Interpreter::NOT_LIKE))
{
if (! col->get_var_length(val, len))
{
DBUG_RETURN(error(BadLength));
}
}
}
}
if (col->m_storageType == NDB_STORAGETYPE_DISK)
m_flags|= UsesDisk;
if (add_branch(Interpreter::BranchCol(c, 0, 0), Label) != 0)
DBUG_RETURN(-1);
if (add1(Interpreter::BranchCol_2(attrId, len)) != 0)
DBUG_RETURN(-1);
/* Get value byte length rounded up to nearest 32-bit word */
Uint32 len2 = Interpreter::mod4(len);
if((len2 == len) && (lastWordMask == (Uint32)~0))
{
/* Whole number of 32-bit words */
DBUG_RETURN(addN((Uint32*)val, len2 >> 2));
}
/* else */
/* Partial last word */
len2 -= 4;
if (addN((Uint32*)val, len2 >> 2) != 0)
DBUG_RETURN(-1);
/* Zero insignificant bytes in last word */
Uint32 tmp = 0;
for (Uint32 i = 0; i < len-len2; i++) {
char* p = (char*)&tmp;
p[i] = ((char*)val)[len2+i];
}
DBUG_RETURN(add1((tmp & lastWordMask)));
}
int
NdbInterpretedCode::branch_col_eq(const void * val,
Uint32 len,
Uint32 attrId,
Uint32 Label)
{
return branch_col(Interpreter::EQ, attrId, val, 0, Label);
}
int
NdbInterpretedCode::branch_col_ne(const void * val,
Uint32 len,
Uint32 attrId,
Uint32 Label)
{
return branch_col(Interpreter::NE, attrId, val, 0, Label);
}
int
NdbInterpretedCode::branch_col_lt(const void * val,
Uint32 len,
Uint32 attrId,
Uint32 Label)
{
return branch_col(Interpreter::LT, attrId, val, 0, Label);
}
int
NdbInterpretedCode::branch_col_le(const void * val,
Uint32 len,
Uint32 attrId,
Uint32 Label)
{
return branch_col(Interpreter::LE, attrId, val, 0, Label);
}
int
NdbInterpretedCode::branch_col_gt(const void * val,
Uint32 len,
Uint32 attrId,
Uint32 Label)
{
return branch_col(Interpreter::GT, attrId, val, 0, Label);
}
int
NdbInterpretedCode::branch_col_ge(const void * val,
Uint32 len,
Uint32 attrId,
Uint32 Label)
{
return branch_col(Interpreter::GE, attrId, val, 0, Label);
}
int
NdbInterpretedCode::branch_col_like(const void * val,
Uint32 len,
Uint32 attrId,
Uint32 Label)
{
return branch_col(Interpreter::LIKE, attrId, val, len, Label);
}
int
NdbInterpretedCode::branch_col_notlike(const void * val,
Uint32 len,
Uint32 attrId,
Uint32 Label)
{
return branch_col(Interpreter::NOT_LIKE, attrId, val, len, Label);
}
int
NdbInterpretedCode::branch_col_and_mask_eq_mask(const void * mask,
Uint32 len,
Uint32 attrId,
Uint32 label)
{
return branch_col(Interpreter::AND_EQ_MASK, attrId, mask, 0, Label);
}
int
NdbInterpretedCode::branch_col_and_mask_ne_mask(const void * mask,
Uint32 len,
Uint32 attrId,
Uint32 label)
{
return branch_col(Interpreter::AND_NE_MASK, attrId, mask, 0, Label);
}
int
NdbInterpretedCode::branch_col_and_mask_eq_zero(const void * mask,
Uint32 len,
Uint32 attrId,
Uint32 label)
{
return branch_col(Interpreter::AND_EQ_ZERO, attrId, mask, 0, Label);
}
int
NdbInterpretedCode::branch_col_and_mask_ne_zero(const void * mask,
Uint32 len,
Uint32 attrId,
Uint32 label)
{
return branch_col(Interpreter::AND_NE_ZERO, attrId, mask, 0, Label);
}
int
NdbInterpretedCode::interpret_exit_ok()
{
return add1(Interpreter::EXIT_OK);
}
int
NdbInterpretedCode::interpret_exit_nok(Uint32 ErrorCode)
{
return add1((ErrorCode << 16) | Interpreter::EXIT_REFUSE);
}
int
NdbInterpretedCode::interpret_exit_nok()
{
return add1((626 << 16) | Interpreter::EXIT_REFUSE);
}
int
NdbInterpretedCode::interpret_exit_last_row()
{
return add1(Interpreter::EXIT_OK_LAST);
}
int
NdbInterpretedCode::add_val(Uint32 attrId, Uint32 aValue)
{
/* Load attribute into register 6 */
int res= 0;
if ((res= read_attr(6, attrId) != 0))
return res;
/* Load constant into register 7 */
/* We attempt to use the smallest constant load
* instruction
*/
if (aValue < (1 << 16))
{
if ((res= load_const_u16(7, aValue)) != 0)
return res;
}
else
{
if ((res= load_const_u32(7, aValue)) != 0)
return res;
}
/* Add registers 6 and 7 -> 7*/
if ((res= add_reg(7, 6, 7)) != 0)
return res;
/* Write back */
return write_attr(attrId, 7);
}
int
NdbInterpretedCode::add_val(Uint32 attrId, Uint64 aValue)
{
/* Load attribute into register 6 */
int res= 0;
if ((res= read_attr(6, attrId) != 0))
return res;
/* Load constant into register 7 */
/* We attempt to use the smallest constant load
* instruction
*/
if ((aValue >> 32) == 0)
{
if (aValue < (1 << 16))
{
if ((res= load_const_u16(7, (Uint32)aValue)) != 0)
return res;
}
else
{
if ((res= load_const_u32(7, (Uint32)aValue)) != 0)
return res;
}
}
else
if ((res= load_const_u64(7, aValue)) != 0)
return res;
/* Add registers 6 and 7 -> 7*/
if ((res= add_reg(7, 6, 7)) != 0)
return res;
/* Write back */
return write_attr(attrId, 7);
}
int
NdbInterpretedCode::sub_val(Uint32 attrId, Uint32 aValue)
{
/* Load attribute into register 6 */
int res= 0;
if ((res= read_attr(6, attrId) != 0))
return res;
/* Load constant into register 7 */
/* We attempt to use the smallest constant load
* instruction
*/
if (aValue < (1 << 16))
{
if ((res= load_const_u16(7, aValue)) != 0)
return res;
}
else
{
if ((res= load_const_u32(7, aValue)) != 0)
return res;
}
/* Subtract register (R7=R6-R7)*/
if ((res= sub_reg(7, 6, 7)) != 0)
return res;
/* Write back */
return write_attr(attrId, 7);
}
int
NdbInterpretedCode::sub_val(Uint32 attrId, Uint64 aValue)
{
/* Load attribute into register 6 */
int res= 0;
if ((res= read_attr(6, attrId) != 0))
return res;
/* Load constant into register 7 */
/* We attempt to use the smallest constant load
* instruction
*/
if ((aValue >> 32) == 0)
{
if (aValue < (1 << 16))
{
if ((res= load_const_u16(7, (Uint32)aValue)) != 0)
return res;
}
else
{
if ((res= load_const_u32(7, (Uint32)aValue)) != 0)
return res;
}
}
else
{
if ((res= load_const_u64(7, aValue)) != 0)
return res;
}
/* Subtract register (R7=R6-R7)*/
if ((res= sub_reg(7, 6, 7)) != 0)
return res;
/* Write back */
return write_attr(attrId, 7);
}
int
NdbInterpretedCode::def_sub(Uint32 SubroutineNumber)
{
if (SubroutineNumber > MaxSubs)
return error(BadSubNumber);
if (m_flags & InSubroutineDef)
return error(BadState);
if (m_number_of_calls == 0)
return error(BadState);
/* Record where subroutines start */
if (m_number_of_subs == 0)
m_first_sub_instruction_pos= m_instructions_length;
m_number_of_subs++;
m_flags|= InSubroutineDef;
CodeMetaInfo info;
info.type= Subroutine;
info.number= SubroutineNumber;
info.firstInstrPos=
m_instructions_length - m_first_sub_instruction_pos;
// Note, no check for whether the label's already defined here.
return addMeta(info);
}
int
NdbInterpretedCode::call_sub(Uint32 SubroutineNumber)
{
if (SubroutineNumber > MaxSubs)
return error(BadState);
m_number_of_calls ++;
return add1(Interpreter::CALL | (SubroutineNumber << 16));
}
int
NdbInterpretedCode::ret_sub()
{
if ((m_flags & InSubroutineDef) == 0)
return error(BadState);
m_flags&= ~(InSubroutineDef);
return add1(Interpreter::RETURN);
}
/* Get a CodeMetaInfo object given a number
* Label numbers start from 0. Subroutine numbers start from
* the highest label number
*/
int
NdbInterpretedCode::getInfo(Uint32 number, CodeMetaInfo &info) const
{
if (number >= (m_number_of_labels + m_number_of_subs))
return -1;
Uint32 pos= m_buffer_length
- ((number+1) * CODEMETAINFO_WORDS);
info.number= (m_buffer[pos + 1] >> 16) & 0xffff;
info.type= m_buffer[pos + 1] & 0xffff;
info.firstInstrPos= m_buffer[pos];
return 0;
}
/* Update internal NdbError object based on its code */
static void
update(const NdbError & _err){
NdbError & error = (NdbError &) _err;
ndberror_struct ndberror = (ndberror_struct)error;
ndberror_update(&ndberror);
error = NdbError(ndberror);
}
const NdbDictionary::Table *
NdbInterpretedCode::getTable() const
{
return (m_table_impl == NULL) ?
NULL :
m_table_impl->m_facade;
}
const NdbError &
NdbInterpretedCode::getNdbError() const
{
/* Set the correct error info before returning to
* caller
*/
update(m_error);
return m_error;
}
Uint32
NdbInterpretedCode::getWordsUsed() const
{
return (m_buffer_length - m_available_length);
}
int
NdbInterpretedCode::copy(const NdbInterpretedCode& src)
{
m_table_impl = src.m_table_impl;
m_buffer_length = src.m_buffer_length;
/**
* Each NdbInterpretedCode manages life cycle of m_internal_buffer.
*/
if (m_internal_buffer!=NULL)
{
delete[] m_internal_buffer;
m_internal_buffer = NULL;
}
if (src.m_internal_buffer==NULL)
{
// External buffer with externaly managed life cycle.
m_buffer = src.m_buffer;
}
else
{
m_buffer = m_internal_buffer = new Uint32[m_buffer_length];
if (unlikely(m_internal_buffer==NULL))
{
return 4000; // Alllocation failed.
}
memcpy(m_internal_buffer,
src.m_internal_buffer,
m_buffer_length*sizeof(Uint32));
}
m_number_of_labels = src.m_number_of_labels;
m_number_of_subs = src.m_number_of_subs;
m_number_of_calls = src.m_number_of_calls;