mxq_job: allow to set limit for assigning jobs to deamon

no logic was changed in this commit

renamed mxq_assign_job_from_group_to_daemon() to mxq_assign_jobs_from_group_to_daemon()
and added parameter limit

relates to issue #51

mxq_job.c

@@ -291,7 +291,7 @@ int mxq_load_jobs_in_group_with_status(struct mx_mysql *mysql, struct mxq_job **
     return res;
 }
 
-int mxq_assign_job_from_group_to_daemon(struct mx_mysql *mysql, uint64_t group_id, struct mxq_daemon *daemon, unsigned long slots_per_job)
+int mxq_assign_jobs_from_group_to_daemon(struct mx_mysql *mysql, uint64_t group_id, struct mxq_daemon *daemon, unsigned long slots_per_job, uint64_t limit)
 {
     struct mx_mysql_bind param = {0};
     int res;
@@ -323,9 +323,9 @@ int mxq_assign_job_from_group_to_daemon(struct mx_mysql *mysql, uint64_t group_i
             " ORDER BY"
               " job_priority,"
               " job_id"
-            " LIMIT 1";
+            " LIMIT ?";
 
-    res = mx_mysql_bind_init_param(&param, 5);
+    res = mx_mysql_bind_init_param(&param, 6);
     assert(res == 0);
 
     idx = 0;
@@ -335,6 +335,7 @@ int mxq_assign_job_from_group_to_daemon(struct mx_mysql *mysql, uint64_t group_i
     res += mx_mysql_bind_var(&param, idx++, uint64, &slots_per_job);
     res += mx_mysql_bind_var(&param, idx++, string, &daemon->daemon_name);
     res += mx_mysql_bind_var(&param, idx++, uint64, &group_id);
+    res += mx_mysql_bind_var(&param, idx++, uint64, &limit);
     assert(res == 0);
 
     res = mx_mysql_do_statement_noresult(mysql, query, &param);
@@ -703,13 +704,13 @@ int mxq_load_job_from_group_for_daemon(struct mx_mysql *mysql, struct mxq_job *j
             break;
         }
 
-        res = mxq_assign_job_from_group_to_daemon(mysql, group_id, daemon, slots_per_job);
+        res = mxq_assign_jobs_from_group_to_daemon(mysql, group_id, daemon, slots_per_job, 1);
         if (res < 0) {
-            mx_log_err("  group_id=%lu :: mxq_assign_job_from_group_to_daemon(): %m", group_id);
+            mx_log_err("  group_id=%lu :: mxq_assign_jobs_from_group_to_daemon(): %m", group_id);
             return 0;
         }
         if (res == 0) {
-            mx_log_warning("  group_id=%lu :: mxq_assign_job_from_group_to_daemon(): No matching job found - maybe another server was a bit faster. ;)", group_id);
+            mx_log_warning("  group_id=%lu :: mxq_assign_jobs_from_group_to_daemon(): No matching job found - maybe another server was a bit faster. ;)", group_id);
             return 0;
         }
     } while (1);

mxq_job.h

@@ -101,7 +101,7 @@ void mxq_job_free_content(struct mxq_job *j);
 int mxq_load_job(struct mx_mysql *mysql, struct mxq_job **mxq_jobs, uint64_t job_id);
 int mxq_load_jobs_in_group(struct mx_mysql *mysql, struct mxq_job **mxq_jobs, struct mxq_group *grp);
 int mxq_load_jobs_in_group_with_status(struct mx_mysql *mysql, struct mxq_job **mxq_jobs, struct mxq_group *grp, uint64_t job_status);
-int mxq_assign_job_from_group_to_daemon(struct mx_mysql *mysql, uint64_t group_id, struct mxq_daemon *daemon, unsigned long slots_per_job);
+int mxq_assign_jobs_from_group_to_daemon(struct mx_mysql *mysql, uint64_t group_id, struct mxq_daemon *daemon, unsigned long slots_per_job, uint64_t limit);
 int mxq_unassign_jobs_of_server(struct mx_mysql *mysql, struct mxq_daemon *daemon);
 int mxq_set_job_status_loaded_on_server(struct mx_mysql *mysql, struct mxq_job *job);
 int mxq_set_job_status_running(struct mx_mysql *mysql, struct mxq_job *job);