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-rw-r--r--job.c100
1 files changed, 98 insertions, 2 deletions
diff --git a/job.c b/job.c
index bbb8214895..6241f203f9 100644
--- a/job.c
+++ b/job.c
@@ -1,6 +1,7 @@
/*-*- Mode: C; c-basic-offset: 8 -*-*/
#include <assert.h>
+#include <errno.h>
#include "macro.h"
#include "job.h"
@@ -127,7 +128,7 @@ void job_dependency_delete(Job *subject, Job *object, bool *matters) {
job_dependency_free(l);
}
-void job_dump(Job *j, FILE*f, const char *prefix) {
+const char* job_type_to_string(JobType t) {
static const char* const job_type_table[_JOB_TYPE_MAX] = {
[JOB_START] = "start",
@@ -139,6 +140,15 @@ void job_dump(Job *j, FILE*f, const char *prefix) {
[JOB_TRY_RESTART] = "try-restart",
};
+
+ if (t < 0 || t >= _JOB_TYPE_MAX)
+ return "n/a";
+
+ return job_type_table[t];
+}
+
+void job_dump(Job *j, FILE*f, const char *prefix) {
+
static const char* const job_state_table[_JOB_STATE_MAX] = {
[JOB_WAITING] = "waiting",
[JOB_RUNNING] = "running",
@@ -153,7 +163,7 @@ void job_dump(Job *j, FILE*f, const char *prefix) {
"%s\tAction: %s → %s\n"
"%s\tState: %s\n",
prefix, j->id,
- prefix, name_id(j->name), job_type_table[j->type],
+ prefix, name_id(j->name), job_type_to_string(j->type),
prefix, job_state_table[j->state]);
}
@@ -168,3 +178,89 @@ bool job_is_anchor(Job *j) {
return false;
}
+
+static bool types_match(JobType a, JobType b, JobType c, JobType d) {
+ return
+ (a == c && b == d) ||
+ (a == d && b == c);
+}
+
+int job_type_merge(JobType *a, JobType b) {
+ if (*a == b)
+ return 0;
+
+ /* Merging is associative! a merged with b merged with c is
+ * the same as a merged with c merged with b. */
+
+ /* Mergeability is transitive! if a can be merged with b and b
+ * with c then a also with c */
+
+ /* Also, if a merged with b cannot be merged with c, then
+ * either a or b cannot be merged with c either */
+
+ if (types_match(*a, b, JOB_START, JOB_VERIFY_STARTED))
+ *a = JOB_START;
+ else if (types_match(*a, b, JOB_START, JOB_RELOAD) ||
+ types_match(*a, b, JOB_START, JOB_RELOAD_OR_START) ||
+ types_match(*a, b, JOB_VERIFY_STARTED, JOB_RELOAD_OR_START) ||
+ types_match(*a, b, JOB_RELOAD, JOB_RELOAD_OR_START))
+ *a = JOB_RELOAD_OR_START;
+ else if (types_match(*a, b, JOB_START, JOB_RESTART) ||
+ types_match(*a, b, JOB_START, JOB_TRY_RESTART) ||
+ types_match(*a, b, JOB_VERIFY_STARTED, JOB_RESTART) ||
+ types_match(*a, b, JOB_RELOAD, JOB_RESTART) ||
+ types_match(*a, b, JOB_RELOAD_OR_START, JOB_RESTART) ||
+ types_match(*a, b, JOB_RELOAD_OR_START, JOB_TRY_RESTART) ||
+ types_match(*a, b, JOB_RESTART, JOB_TRY_RESTART))
+ *a = JOB_RESTART;
+ else if (types_match(*a, b, JOB_VERIFY_STARTED, JOB_RELOAD))
+ *a = JOB_RELOAD;
+ else if (types_match(*a, b, JOB_VERIFY_STARTED, JOB_TRY_RESTART) ||
+ types_match(*a, b, JOB_RELOAD, JOB_TRY_RESTART))
+ *a = JOB_TRY_RESTART;
+ else
+ return -EEXIST;
+
+ return 0;
+}
+
+bool job_type_mergeable(JobType a, JobType b) {
+ return job_type_merge(&a, b) >= 0;
+}
+
+bool job_type_is_superset(JobType a, JobType b) {
+
+ /* Checks whether operation a is a "superset" of b */
+
+ if (a == b)
+ return true;
+
+ switch (a) {
+ case JOB_START:
+ return b == JOB_VERIFY_STARTED;
+
+ case JOB_RELOAD:
+ return b == JOB_VERIFY_STARTED;
+
+ case JOB_RELOAD_OR_START:
+ return
+ b == JOB_RELOAD ||
+ b == JOB_START;
+
+ case JOB_RESTART:
+ return
+ b == JOB_START ||
+ b == JOB_VERIFY_STARTED ||
+ b == JOB_RELOAD ||
+ b == JOB_RELOAD_OR_START ||
+ b == JOB_TRY_RESTART;
+
+ case JOB_TRY_RESTART:
+ return
+ b == JOB_VERIFY_STARTED ||
+ b == JOB_RELOAD;
+ default:
+ return false;
+
+ }
+}