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Change the OP_InitCoroutine instruction to jump over the co-routine

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implementation.

FossilOrigin-Name: a522f364a6b8ca6f69c353b30609a2166f6e94cf
This commit is contained in:
drh
2014-02-07 19:18:10 +00:00
parent 81cf13ec7b
commit ed71a839fd
7 changed files with 38 additions and 43 deletions
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22
src/vdbe.c
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@@ -731,20 +731,24 @@ case OP_Return: { /* in1 */
break;
}
/* Opcode: InitCoroutine P1 P2 * * *
/* Opcode: InitCoroutine P1 P2 P3 * *
**
** Identify the co-routine at address P2 using the register P1
** as its return address. Run this opcode prior to the first
** OP_Yield to invoke the co-routine.
** Set up register P1 so that it will OP_Yield to the co-routine
** located at address P3.
**
** If P2!=0 then the co-routine implementation immediately follows
** this opcode. So jump over the co-routine implementation to
** address P2.
*/
case OP_InitCoroutine: { /* jump */
assert( pOp->p1>0 );
assert( pOp->p1<=(p->nMem-p->nCursor) );
assert( pOp->p1>0 && pOp->p1<=(p->nMem-p->nCursor) );
assert( pOp->p2>=0 && pOp->p2<p->nOp );
assert( pOp->p3>=0 && pOp->p3<p->nOp );
pOut = &aMem[pOp->p1];
memAboutToChange(p, pOut);
VdbeMemRelease(pOut);
pOut->u.i = pOp->p2 - 1;
assert( !VdbeMemDynamic(pOut) );
pOut->u.i = pOp->p3 - 1;
pOut->flags = MEM_Int;
if( pOp->p2 ) pc = pOp->p2 - 1;
break;
}