From ac43d7e159b742cc7e36c7793869c9b04ec62e01 Mon Sep 17 00:00:00 2001
From: Michal Schmidt <mschmidt@redhat.com>
Date: Wed, 18 Apr 2012 15:21:24 +0200
Subject: [PATCH] job: jobs shouldn't need to know about transaction anchors

Let the transactions maintain their own anchor links.
(cherry picked from commit 1da4264fbd0fa5e6b1bd5e0ac4674a3503774369)
---
 src/job.c         |    8 ++------
 src/job.h         |    5 ++---
 src/transaction.c |   18 +++++++++++++++---
 3 files changed, 19 insertions(+), 12 deletions(-)

diff --git a/src/job.c b/src/job.c
index deebc67..64181ae 100644
--- a/src/job.c
+++ b/src/job.c
@@ -96,7 +96,7 @@ void job_free(Job *j) {
         free(j);
 }
 
-JobDependency* job_dependency_new(Job *subject, Job *object, bool matters, bool conflicts, Transaction *tr) {
+JobDependency* job_dependency_new(Job *subject, Job *object, bool matters, bool conflicts) {
         JobDependency *l;
 
         assert(object);
@@ -116,21 +116,17 @@ JobDependency* job_dependency_new(Job *subject, Job *object, bool matters, bool
 
         if (subject)
                 LIST_PREPEND(JobDependency, subject, subject->subject_list, l);
-        else
-                LIST_PREPEND(JobDependency, subject, tr->anchor, l);
 
         LIST_PREPEND(JobDependency, object, object->object_list, l);
 
         return l;
 }
 
-void job_dependency_free(JobDependency *l, Transaction *tr) {
+void job_dependency_free(JobDependency *l) {
         assert(l);
 
         if (l->subject)
                 LIST_REMOVE(JobDependency, subject, l->subject->subject_list, l);
-        else
-                LIST_REMOVE(JobDependency, subject, tr->anchor, l);
 
         LIST_REMOVE(JobDependency, object, l->object->object_list, l);
 
diff --git a/src/job.h b/src/job.h
index faa10e3..cbd10c5 100644
--- a/src/job.h
+++ b/src/job.h
@@ -34,7 +34,6 @@ typedef enum JobMode JobMode;
 typedef enum JobResult JobResult;
 
 #include "manager.h"
-#include "transaction.h"
 #include "unit.h"
 #include "hashmap.h"
 #include "list.h"
@@ -142,8 +141,8 @@ void job_uninstall(Job *j);
 void job_free(Job *job);
 void job_dump(Job *j, FILE*f, const char *prefix);
 
-JobDependency* job_dependency_new(Job *subject, Job *object, bool matters, bool conflicts, Transaction *tr);
-void job_dependency_free(JobDependency *l, Transaction *tr);
+JobDependency* job_dependency_new(Job *subject, Job *object, bool matters, bool conflicts);
+void job_dependency_free(JobDependency *l);
 
 bool job_is_anchor(Job *j);
 
diff --git a/src/transaction.c b/src/transaction.c
index 1344e2f..2a6f1de 100644
--- a/src/transaction.c
+++ b/src/transaction.c
@@ -789,6 +789,12 @@ static Job* transaction_add_one_job(Transaction *tr, JobType type, Unit *unit, b
         return j;
 }
 
+static void transaction_job_dependency_free(Transaction *tr, JobDependency *l) {
+        if (!l->subject)
+                LIST_REMOVE(JobDependency, subject, tr->anchor, l);
+        job_dependency_free(l);
+}
+
 static void transaction_unlink_job(Transaction *tr, Job *j, bool delete_dependencies) {
         assert(tr);
         assert(j);
@@ -806,12 +812,12 @@ static void transaction_unlink_job(Transaction *tr, Job *j, bool delete_dependen
         j->transaction_prev = j->transaction_next = NULL;
 
         while (j->subject_list)
-                job_dependency_free(j->subject_list, tr);
+                transaction_job_dependency_free(tr, j->subject_list);
 
         while (j->object_list) {
                 Job *other = j->object_list->matters ? j->object_list->subject : NULL;
 
-                job_dependency_free(j->object_list, tr);
+                transaction_job_dependency_free(tr, j->object_list);
 
                 if (other && delete_dependencies) {
                         log_debug("Deleting job %s/%s as dependency of job %s/%s",
@@ -835,6 +841,7 @@ int transaction_add_job_and_dependencies(
                 DBusError *e,
                 Job **_ret) {
         Job *ret;
+        JobDependency *l;
         Iterator i;
         Unit *dep;
         int r;
@@ -884,9 +891,14 @@ int transaction_add_job_and_dependencies(
         ret->ignore_order = ret->ignore_order || ignore_order;
 
         /* Then, add a link to the job. */
-        if (!job_dependency_new(by, ret, matters, conflicts, tr))
+        l = job_dependency_new(by, ret, matters, conflicts);
+        if (!l)
                 return -ENOMEM;
 
+        /* If the link has no subject job, it's the anchor link. */
+        if (!by)
+                LIST_PREPEND(JobDependency, subject, tr->anchor, l);
+
         if (is_new && !ignore_requirements) {
                 Set *following;