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MySQL 5.1: sp_instr_jump Class Reference

sp_instr_jump Class Reference

#include <sp_head.h>

Inheritance diagram for sp_instr_jump:

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[legend]List of all members.


Public Member Functions
	sp_instr_jump (uint ip, sp_pcontext *ctx)
	sp_instr_jump (uint ip, sp_pcontext *ctx, uint dest)
virtual	~sp_instr_jump ()
virtual int	execute (THD thd, uint nextp)
virtual void	print (String *str)
virtual uint	opt_mark (sp_head *sp)
virtual uint	opt_shortcut_jump (sp_head sp, sp_instr start)
virtual void	opt_move (uint dst, List< sp_instr > *ibp)
virtual void	backpatch (uint dest, sp_pcontext *dst_ctx)
virtual void	set_destination (uint old_dest, uint new_dest)
Private Member Functions
	sp_instr_jump (const sp_instr_jump &)
void	operator= (sp_instr_jump &)

Detailed Description

Definition at line 733 of file sp_head.h.

Constructor & Destructor Documentation

sp_instr_jump::sp_instr_jump ( const sp_instr_jump & ) [private]

sp_instr_jump::sp_instr_jump	(	uint	ip,
		sp_pcontext *	ctx
	)			`[inline]`

Definition at line 740 of file sp_head.h.

00741     : sp_instr_opt_meta(ip, ctx)
00742   {}

sp_instr_jump::sp_instr_jump	(	uint	ip,
		sp_pcontext *	ctx,
		uint	dest
	)			`[inline]`

Definition at line 744 of file sp_head.h.

00745     : sp_instr_opt_meta(ip, ctx, dest)
00746   {}

virtual sp_instr_jump::~sp_instr_jump ( ) [inline, virtual]

Definition at line 748 of file sp_head.h.

00749   {}

Member Function Documentation

virtual void sp_instr_jump::backpatch	(	uint	dest,
		sp_pcontext *	dst_ctx
	)			`[inline, virtual]`

Reimplemented from sp_instr.

Definition at line 761 of file sp_head.h.

References sp_instr_opt_meta::m_dest.

00762   {
00763     if (m_dest == 0)            // Don't reset
00764       m_dest= dest;
00765   }

int sp_instr_jump::execute	(	THD *	thd,
		uint *	nextp
	)			`[virtual]`

Implements sp_instr.

Reimplemented in sp_instr_jump_if_not, sp_instr_hpush_jump, and sp_instr_hreturn.

Definition at line 2642 of file sp_head.cc.

References DBUG_ENTER, DBUG_PRINT, DBUG_RETURN, and sp_instr_opt_meta::m_dest.

02643 {
02644   DBUG_ENTER("sp_instr_jump::execute");
02645   DBUG_PRINT("info", ("destination: %u", m_dest));
02646 
02647   *nextp= m_dest;
02648   DBUG_RETURN(0);
02649 }

void sp_instr_jump::operator= ( sp_instr_jump & ) [private]

uint sp_instr_jump::opt_mark ( sp_head * sp ) [virtual]

Reimplemented from sp_instr.

Reimplemented in sp_instr_jump_if_not, sp_instr_hpush_jump, and sp_instr_hreturn.

Definition at line 2662 of file sp_head.cc.

References sp_head::get_instr(), sp_instr_opt_meta::m_dest, sp_instr::m_ip, sp_instr_opt_meta::m_optdest, sp_instr::marked, and opt_shortcut_jump().

Referenced by sp_instr_hreturn::opt_mark().

02663 {
02664   m_dest= opt_shortcut_jump(sp, this);
02665   if (m_dest != m_ip+1)         /* Jumping to following instruction? */
02666     marked= 1;
02667   m_optdest= sp->get_instr(m_dest);
02668   return m_dest;
02669 }

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void sp_instr_jump::opt_move	(	uint	dst,
		List< sp_instr > *	ibp
	)			`[virtual]`

Reimplemented from sp_instr.

Reimplemented in sp_instr_jump_if_not.

Definition at line 2692 of file sp_head.cc.

References sp_instr_opt_meta::m_dest, sp_instr::m_ip, sp_instr_opt_meta::m_optdest, and List< T >::push_back().

Referenced by sp_instr_jump_if_not::opt_move().

02693 {
02694   if (m_dest > m_ip)
02695     bp->push_back(this);        // Forward
02696   else if (m_optdest)
02697     m_dest= m_optdest->m_ip;    // Backward
02698   m_ip= dst;
02699 }

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uint sp_instr_jump::opt_shortcut_jump	(	sp_head *	sp,
		sp_instr *	start
	)			`[virtual]`

Reimplemented from sp_instr.

Reimplemented in sp_instr_jump_if_not, and sp_instr_hpush_jump.

Definition at line 2672 of file sp_head.cc.

References sp_head::get_instr(), sp_instr_opt_meta::m_dest, sp_instr::opt_shortcut_jump(), and start().

Referenced by opt_mark().

02673 {
02674   uint dest= m_dest;
02675   sp_instr *i;
02676 
02677   while ((i= sp->get_instr(dest)))
02678   {
02679     uint ndest;
02680 
02681     if (start == i || this == i)
02682       break;
02683     ndest= i->opt_shortcut_jump(sp, start);
02684     if (ndest == dest)
02685       break;
02686     dest= ndest;
02687   }
02688   return dest;
02689 }

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void sp_instr_jump::print ( String * str ) [virtual]

Implements sp_instr.

Reimplemented in sp_instr_jump_if_not, sp_instr_hpush_jump, and sp_instr_hreturn.

Definition at line 2652 of file sp_head.cc.

References sp_instr_opt_meta::m_dest, String::qs_append(), String::reserve(), SP_INSTR_UINT_MAXLEN, and STRING_WITH_LEN.

02653 {
02654   /* jump dest */
02655   if (str->reserve(SP_INSTR_UINT_MAXLEN+5))
02656     return;
02657   str->qs_append(STRING_WITH_LEN("jump "));
02658   str->qs_append(m_dest);
02659 }

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virtual void sp_instr_jump::set_destination	(	uint	old_dest,
		uint	new_dest
	)			`[inline, virtual]`

Implements sp_instr_opt_meta.

Reimplemented in sp_instr_jump_if_not.

Definition at line 770 of file sp_head.h.

References sp_instr_opt_meta::m_dest.

Referenced by sp_instr_jump_if_not::set_destination().

00771   {
00772     if (m_dest == old_dest)
00773       m_dest= new_dest;
00774   }

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The documentation for this class was generated from the following files:

mysql/src/5.1-dbg/sql/sp_head.h
mysql/src/5.1-dbg/sql/sp_head.cc

Generated on Sat Sep 9 23:30:35 2006 for MySQL 5.1 by

1.4.7

The world's most popular open source database

sp_instr_jump Class Reference

Public Member Functions

Private Member Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation