/************************************************************************/
+/*
+ * enable/disable learnt rules
+ *
+ * we have enabled or disabled some of our rules. We now reenable all
+ * of our learnt rules except the ones that were learnt from rules that
+ * are now disabled.
+ */
+static void
+enabledisablelearntrules(Solver *solv)
+{
+ Pool *pool = solv->pool;
+ Rule *r;
+ Id why, *whyp;
+ int i;
+
+ POOL_DEBUG(SOLV_DEBUG_SOLUTIONS, "enabledisablelearntrules called\n");
+ for (i = solv->learntrules, r = solv->rules + i; i < solv->nrules; i++, r++)
+ {
+ whyp = solv->learnt_pool.elements + solv->learnt_why.elements[i - solv->learntrules];
+ while ((why = *whyp++) != 0)
+ {
+ assert(why > 0 && why < i);
+ if (solv->rules[why].d < 0)
+ break;
+ }
+ /* why != 0: we found a disabled rule, disable the learnt rule */
+ if (why && r->d >= 0)
+ {
+ IF_POOLDEBUG (SOLV_DEBUG_SOLUTIONS)
+ {
+ POOL_DEBUG(SOLV_DEBUG_SOLUTIONS, "disabling ");
+ solver_printruleclass(solv, SOLV_DEBUG_SOLUTIONS, r);
+ }
+ solver_disablerule(solv, r);
+ }
+ else if (!why && r->d < 0)
+ {
+ IF_POOLDEBUG (SOLV_DEBUG_SOLUTIONS)
+ {
+ POOL_DEBUG(SOLV_DEBUG_SOLUTIONS, "re-enabling ");
+ solver_printruleclass(solv, SOLV_DEBUG_SOLUTIONS, r);
+ }
+ solver_enablerule(solv, r);
+ }
+ }
+}
+
+
/*
* make assertion rules into decisions
*
int decisionstart;
int record_proof = 1;
int oldproblemcount;
+ int havedisabled = 0;
/* The system solvable is always installed first */
assert(solv->decisionq.count == 0);
queue_push(&solv->decisionq_why, 0);
solv->decisionmap[SYSTEMSOLVABLE] = 1; /* installed at level '1' */
- /* note that the ruleassertions queue is ordered */
decisionstart = solv->decisionq.count;
- for (ii = 0; ii < solv->ruleassertions.count; ii++)
+ for (;;)
{
- ri = solv->ruleassertions.elements[ii];
- r = solv->rules + ri;
-
- if (r->d < 0 || !r->p || r->w2) /* disabled, dummy or no assertion */
- continue;
- /* do weak rules in phase 2 */
- if (ri < solv->learntrules && MAPTST(&solv->weakrulemap, ri))
- continue;
-
- v = r->p;
- vv = v > 0 ? v : -v;
-
- if (!solv->decisionmap[vv]) /* if not yet decided */
+ /* if we needed to re-run, back up decisions to decisionstart */
+ while (solv->decisionq.count > decisionstart)
{
- queue_push(&solv->decisionq, v);
- queue_push(&solv->decisionq_why, r - solv->rules);
- solv->decisionmap[vv] = v > 0 ? 1 : -1;
- IF_POOLDEBUG (SOLV_DEBUG_PROPAGATE)
- {
- Solvable *s = solv->pool->solvables + vv;
- if (v < 0)
- POOL_DEBUG(SOLV_DEBUG_PROPAGATE, "conflicting %s (assertion)\n", pool_solvable2str(solv->pool, s));
- else
- POOL_DEBUG(SOLV_DEBUG_PROPAGATE, "installing %s (assertion)\n", pool_solvable2str(solv->pool, s));
- }
- continue;
+ v = solv->decisionq.elements[--solv->decisionq.count];
+ --solv->decisionq_why.count;
+ vv = v > 0 ? v : -v;
+ solv->decisionmap[vv] = 0;
}
- /*
- * check against previous decision: is there a conflict ?
- */
- if (v > 0 && solv->decisionmap[vv] > 0) /* ok to install */
- continue;
- if (v < 0 && solv->decisionmap[vv] < 0) /* ok to remove */
- continue;
-
- /*
- * found a conflict!
- *
- * The rule (r) we're currently processing says something
- * different (v = r->p) than a previous decision (decisionmap[abs(v)])
- * on this literal
- */
-
- if (ri >= solv->learntrules)
- {
- /* conflict with a learnt rule */
- /* can happen when packages cannot be installed for
- * multiple reasons. */
- /* we disable the learnt rule in this case */
- solver_disablerule(solv, r);
- continue;
- }
-
- /*
- * find the decision which is the "opposite" of the rule
- */
-
- for (i = 0; i < solv->decisionq.count; i++)
- if (solv->decisionq.elements[i] == -v)
- break;
- assert(i < solv->decisionq.count); /* assert that we found it */
- oldproblemcount = solv->problems.count;
-
- /*
- * conflict with system solvable ?
- */
- if (v == -SYSTEMSOLVABLE)
+ /* note that the ruleassertions queue is ordered */
+ for (ii = 0; ii < solv->ruleassertions.count; ii++)
{
- if (record_proof)
+ ri = solv->ruleassertions.elements[ii];
+ r = solv->rules + ri;
+
+ if (havedisabled && ri >= solv->learntrules)
{
- queue_push(&solv->problems, solv->learnt_pool.count);
- queue_push(&solv->learnt_pool, ri);
- queue_push(&solv->learnt_pool, 0);
+ /* just started with learnt rule assertions. If we have disabled
+ * some rules, adapt the learnt rule status */
+ enabledisablelearntrules(solv);
+ havedisabled = 0;
}
- else
- queue_push(&solv->problems, 0);
- POOL_DEBUG(SOLV_DEBUG_UNSOLVABLE, "conflict with system solvable, disabling rule #%d\n", ri);
- if (ri >= solv->jobrules && ri < solv->jobrules_end)
- v = -(solv->ruletojob.elements[ri - solv->jobrules] + 1);
- else
- v = ri;
- queue_push(&solv->problems, v);
- queue_push(&solv->problems, 0);
- if (solv->allowuninstall && v >= solv->featurerules && v < solv->updaterules_end)
- solv->problems.count = oldproblemcount;
- solver_disableproblem(solv, v);
- continue;
- }
+
+ if (r->d < 0 || !r->p || r->w2) /* disabled, dummy or no assertion */
+ continue;
- assert(solv->decisionq_why.elements[i] > 0);
+ /* do weak rules in phase 2 */
+ if (ri < solv->learntrules && MAPTST(&solv->weakrulemap, ri))
+ continue;
- /*
- * conflict with an rpm rule ?
- */
- if (solv->decisionq_why.elements[i] < solv->rpmrules_end)
- {
+ v = r->p;
+ vv = v > 0 ? v : -v;
+
+ if (!solv->decisionmap[vv]) /* if not yet decided */
+ {
+ queue_push(&solv->decisionq, v);
+ queue_push(&solv->decisionq_why, r - solv->rules);
+ solv->decisionmap[vv] = v > 0 ? 1 : -1;
+ IF_POOLDEBUG (SOLV_DEBUG_PROPAGATE)
+ {
+ Solvable *s = solv->pool->solvables + vv;
+ if (v < 0)
+ POOL_DEBUG(SOLV_DEBUG_PROPAGATE, "conflicting %s (assertion)\n", pool_solvable2str(solv->pool, s));
+ else
+ POOL_DEBUG(SOLV_DEBUG_PROPAGATE, "installing %s (assertion)\n", pool_solvable2str(solv->pool, s));
+ }
+ continue;
+ }
+
+ /* check against previous decision: is there a conflict? */
+ if (v > 0 && solv->decisionmap[vv] > 0) /* ok to install */
+ continue;
+ if (v < 0 && solv->decisionmap[vv] < 0) /* ok to remove */
+ continue;
+
+ /*
+ * found a conflict!
+ *
+ * The rule (r) we're currently processing says something
+ * different (v = r->p) than a previous decision (decisionmap[abs(v)])
+ * on this literal
+ */
+
+ if (ri >= solv->learntrules)
+ {
+ /* conflict with a learnt rule */
+ /* can happen when packages cannot be installed for multiple reasons. */
+ /* we disable the learnt rule in this case */
+ /* (XXX: we should really call analyze_unsolvable_rule here!) */
+ solver_disablerule(solv, r);
+ continue;
+ }
+
+ /*
+ * find the decision which is the "opposite" of the rule
+ */
+ for (i = 0; i < solv->decisionq.count; i++)
+ if (solv->decisionq.elements[i] == -v)
+ break;
+ assert(i < solv->decisionq.count); /* assert that we found it */
+ oldproblemcount = solv->problems.count;
+
+ /*
+ * conflict with system solvable ?
+ */
+ if (v == -SYSTEMSOLVABLE)
+ {
+ if (record_proof)
+ {
+ queue_push(&solv->problems, solv->learnt_pool.count);
+ queue_push(&solv->learnt_pool, ri);
+ queue_push(&solv->learnt_pool, 0);
+ }
+ else
+ queue_push(&solv->problems, 0);
+ POOL_DEBUG(SOLV_DEBUG_UNSOLVABLE, "conflict with system solvable, disabling rule #%d\n", ri);
+ if (ri >= solv->jobrules && ri < solv->jobrules_end)
+ v = -(solv->ruletojob.elements[ri - solv->jobrules] + 1);
+ else
+ v = ri;
+ queue_push(&solv->problems, v);
+ queue_push(&solv->problems, 0);
+ if (solv->allowuninstall && v >= solv->featurerules && v < solv->updaterules_end)
+ solv->problems.count = oldproblemcount;
+ solver_disableproblem(solv, v);
+ havedisabled = 1;
+ break; /* start over */
+ }
+
+ assert(solv->decisionq_why.elements[i] > 0);
+
+ /*
+ * conflict with an rpm rule ?
+ */
+ if (solv->decisionq_why.elements[i] < solv->rpmrules_end)
+ {
+ if (record_proof)
+ {
+ queue_push(&solv->problems, solv->learnt_pool.count);
+ queue_push(&solv->learnt_pool, ri);
+ queue_push(&solv->learnt_pool, solv->decisionq_why.elements[i]);
+ queue_push(&solv->learnt_pool, 0);
+ }
+ else
+ queue_push(&solv->problems, 0);
+ assert(v > 0 || v == -SYSTEMSOLVABLE);
+ POOL_DEBUG(SOLV_DEBUG_UNSOLVABLE, "conflict with rpm rule, disabling rule #%d\n", ri);
+ if (ri >= solv->jobrules && ri < solv->jobrules_end)
+ v = -(solv->ruletojob.elements[ri - solv->jobrules] + 1);
+ else
+ v = ri;
+ queue_push(&solv->problems, v);
+ queue_push(&solv->problems, 0);
+ if (solv->allowuninstall && v >= solv->featurerules && v < solv->updaterules_end)
+ solv->problems.count = oldproblemcount;
+ solver_disableproblem(solv, v);
+ havedisabled = 1;
+ break; /* start over */
+ }
+
+ /*
+ * conflict with another job or update/feature rule
+ */
+
+ /* record proof */
if (record_proof)
{
queue_push(&solv->problems, solv->learnt_pool.count);
}
else
queue_push(&solv->problems, 0);
- assert(v > 0 || v == -SYSTEMSOLVABLE);
- POOL_DEBUG(SOLV_DEBUG_UNSOLVABLE, "conflict with rpm rule, disabling rule #%d\n", ri);
- if (ri >= solv->jobrules && ri < solv->jobrules_end)
- v = -(solv->ruletojob.elements[ri - solv->jobrules] + 1);
- else
- v = ri;
- queue_push(&solv->problems, v);
+
+ POOL_DEBUG(SOLV_DEBUG_UNSOLVABLE, "conflicting update/job assertions over literal %d\n", vv);
+
+ /*
+ * push all of our rules (can only be feature or job rules)
+ * asserting this literal on the problem stack
+ */
+ for (i = solv->featurerules, rr = solv->rules + i; i < solv->learntrules; i++, rr++)
+ {
+ if (rr->d < 0 /* disabled */
+ || rr->w2) /* or no assertion */
+ continue;
+ if (rr->p != vv /* not affecting the literal */
+ && rr->p != -vv)
+ continue;
+ if (MAPTST(&solv->weakrulemap, i)) /* weak: silently ignore */
+ continue;
+
+ POOL_DEBUG(SOLV_DEBUG_UNSOLVABLE, " - disabling rule #%d\n", i);
+ solver_printruleclass(solv, SOLV_DEBUG_UNSOLVABLE, solv->rules + i);
+
+ v = i;
+ if (i >= solv->jobrules && i < solv->jobrules_end)
+ v = -(solv->ruletojob.elements[i - solv->jobrules] + 1);
+ queue_push(&solv->problems, v);
+ }
queue_push(&solv->problems, 0);
- if (solv->allowuninstall && v >= solv->featurerules && v < solv->updaterules_end)
+
+ if (solv->allowuninstall && (v = autouninstall(solv, solv->problems.elements + oldproblemcount + 1)) != 0)
solv->problems.count = oldproblemcount;
- solver_disableproblem(solv, v);
- continue;
- }
- /*
- * conflict with another job or update/feature rule
- */
-
- /* record proof */
- if (record_proof)
- {
- queue_push(&solv->problems, solv->learnt_pool.count);
- queue_push(&solv->learnt_pool, ri);
- queue_push(&solv->learnt_pool, solv->decisionq_why.elements[i]);
- queue_push(&solv->learnt_pool, 0);
+ for (i = oldproblemcount + 1; i < solv->problems.count - 1; i++)
+ solver_disableproblem(solv, solv->problems.elements[i]);
+ havedisabled = 1;
+ break; /* start over */
}
- else
- queue_push(&solv->problems, 0);
-
- POOL_DEBUG(SOLV_DEBUG_UNSOLVABLE, "conflicting update/job assertions over literal %d\n", vv);
+ if (ii < solv->ruleassertions.count)
+ continue;
/*
- * push all of our rules (can only be feature or job rules)
- * asserting this literal on the problem stack
+ * phase 2: now do the weak assertions
*/
- for (i = solv->featurerules, rr = solv->rules + i; i < solv->learntrules; i++, rr++)
+ for (ii = 0; ii < solv->ruleassertions.count; ii++)
{
- if (rr->d < 0 /* disabled */
- || rr->w2) /* or no assertion */
- continue;
- if (rr->p != vv /* not affecting the literal */
- && rr->p != -vv)
+ ri = solv->ruleassertions.elements[ii];
+ r = solv->rules + ri;
+ if (r->d < 0 || r->w2) /* disabled or no assertion */
continue;
- if (MAPTST(&solv->weakrulemap, i)) /* weak: silently ignore */
+ if (ri >= solv->learntrules || !MAPTST(&solv->weakrulemap, ri)) /* skip non-weak */
continue;
-
- POOL_DEBUG(SOLV_DEBUG_UNSOLVABLE, " - disabling rule #%d\n", i);
- solver_printruleclass(solv, SOLV_DEBUG_UNSOLVABLE, solv->rules + i);
-
- v = i;
- if (i >= solv->jobrules && i < solv->jobrules_end)
- v = -(solv->ruletojob.elements[i - solv->jobrules] + 1);
- queue_push(&solv->problems, v);
- }
- queue_push(&solv->problems, 0);
-
- if (solv->allowuninstall && (v = autouninstall(solv, solv->problems.elements + oldproblemcount + 1)) != 0)
- solv->problems.count = oldproblemcount;
-
- for (i = oldproblemcount + 1; i < solv->problems.count - 1; i++)
- solver_disableproblem(solv, solv->problems.elements[i]);
-
- /*
- * start over
- * (back up from decisions)
- */
- while (solv->decisionq.count > decisionstart)
- {
- v = solv->decisionq.elements[--solv->decisionq.count];
- --solv->decisionq_why.count;
+ v = r->p;
vv = v > 0 ? v : -v;
- solv->decisionmap[vv] = 0;
- }
- ii = -1; /* restarts loop at 0 */
- }
- /*
- * phase 2: now do the weak assertions
- */
- for (ii = 0; ii < solv->ruleassertions.count; ii++)
- {
- ri = solv->ruleassertions.elements[ii];
- r = solv->rules + ri;
- if (r->d < 0 || r->w2) /* disabled or no assertion */
- continue;
- if (ri >= solv->learntrules || !MAPTST(&solv->weakrulemap, ri)) /* skip non-weak */
- continue;
- v = r->p;
- vv = v > 0 ? v : -v;
- /*
- * decide !
- * (if not yet decided)
- */
- if (!solv->decisionmap[vv])
- {
- queue_push(&solv->decisionq, v);
- queue_push(&solv->decisionq_why, r - solv->rules);
- solv->decisionmap[vv] = v > 0 ? 1 : -1;
- IF_POOLDEBUG (SOLV_DEBUG_PROPAGATE)
+ if (!solv->decisionmap[vv]) /* if not yet decided */
{
- Solvable *s = solv->pool->solvables + vv;
- if (v < 0)
- POOL_DEBUG(SOLV_DEBUG_PROPAGATE, "conflicting %s (weak assertion)\n", pool_solvable2str(solv->pool, s));
- else
- POOL_DEBUG(SOLV_DEBUG_PROPAGATE, "installing %s (weak assertion)\n", pool_solvable2str(solv->pool, s));
+ queue_push(&solv->decisionq, v);
+ queue_push(&solv->decisionq_why, r - solv->rules);
+ solv->decisionmap[vv] = v > 0 ? 1 : -1;
+ IF_POOLDEBUG (SOLV_DEBUG_PROPAGATE)
+ {
+ Solvable *s = solv->pool->solvables + vv;
+ if (v < 0)
+ POOL_DEBUG(SOLV_DEBUG_PROPAGATE, "conflicting %s (weak assertion)\n", pool_solvable2str(solv->pool, s));
+ else
+ POOL_DEBUG(SOLV_DEBUG_PROPAGATE, "installing %s (weak assertion)\n", pool_solvable2str(solv->pool, s));
+ }
+ continue;
}
- continue;
- }
- /*
- * previously decided, sane ?
- */
- if (v > 0 && solv->decisionmap[vv] > 0)
- continue;
- if (v < 0 && solv->decisionmap[vv] < 0)
- continue;
-
- POOL_DEBUG(SOLV_DEBUG_UNSOLVABLE, "assertion conflict, but I am weak, disabling ");
- solver_printrule(solv, SOLV_DEBUG_UNSOLVABLE, r);
-
- if (ri >= solv->jobrules && ri < solv->jobrules_end)
- v = -(solv->ruletojob.elements[ri - solv->jobrules] + 1);
- else
- v = ri;
- solver_disableproblem(solv, v);
- if (v < 0)
- solver_reenablepolicyrules(solv, -v);
- }
-}
-
-
-/*-------------------------------------------------------------------
- * enable/disable learnt rules
- *
- * we have enabled or disabled some of our rules. We now reenable all
- * of our learnt rules except the ones that were learnt from rules that
- * are now disabled.
- */
-static void
-enabledisablelearntrules(Solver *solv)
-{
- Pool *pool = solv->pool;
- Rule *r;
- Id why, *whyp;
- int i;
+ /* check against previous decision: is there a conflict? */
+ if (v > 0 && solv->decisionmap[vv] > 0)
+ continue;
+ if (v < 0 && solv->decisionmap[vv] < 0)
+ continue;
+
+ POOL_DEBUG(SOLV_DEBUG_UNSOLVABLE, "assertion conflict, but I am weak, disabling ");
+ solver_printrule(solv, SOLV_DEBUG_UNSOLVABLE, r);
- POOL_DEBUG(SOLV_DEBUG_SOLUTIONS, "enabledisablelearntrules called\n");
- for (i = solv->learntrules, r = solv->rules + i; i < solv->nrules; i++, r++)
- {
- whyp = solv->learnt_pool.elements + solv->learnt_why.elements[i - solv->learntrules];
- while ((why = *whyp++) != 0)
- {
- assert(why > 0 && why < i);
- if (solv->rules[why].d < 0)
- break;
- }
- /* why != 0: we found a disabled rule, disable the learnt rule */
- if (why && r->d >= 0)
- {
- IF_POOLDEBUG (SOLV_DEBUG_SOLUTIONS)
- {
- POOL_DEBUG(SOLV_DEBUG_SOLUTIONS, "disabling ");
- solver_printruleclass(solv, SOLV_DEBUG_SOLUTIONS, r);
- }
- solver_disablerule(solv, r);
- }
- else if (!why && r->d < 0)
- {
- IF_POOLDEBUG (SOLV_DEBUG_SOLUTIONS)
- {
- POOL_DEBUG(SOLV_DEBUG_SOLUTIONS, "re-enabling ");
- solver_printruleclass(solv, SOLV_DEBUG_SOLUTIONS, r);
- }
- solver_enablerule(solv, r);
+ if (ri >= solv->jobrules && ri < solv->jobrules_end)
+ v = -(solv->ruletojob.elements[ri - solv->jobrules] + 1);
+ else
+ v = ri;
+ solver_disableproblem(solv, v);
+ if (v < 0)
+ solver_reenablepolicyrules(solv, -v);
+ havedisabled = 1;
+ break; /* start over */
}
+ if (ii == solv->ruleassertions.count)
+ break; /* finished! */
}
}
projects / platform / upstream / libsolv.git / commitdiff