create framework of scheduler

src/scheduler/src/scheduler.c

@@ -0,0 +1,101 @@
+#include <errno.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "client.h"
+#include "scheduler.h"
+
+int sched_init(xce_scheduler_t* sched, xce_client_config_t* config,
+               xce_request_handler_t handler)
+{
+    int rc = 0;
+
+    if ((sched == NULL) || (config == NULL) || (handler == NULL)) {
+        return -EINVAL;
+    }
+
+    memset(sched, 0x0, sizeof(*sched));
+
+    /* FIXME: configurable delta for xlist_init()? */
+    xlist_init(&(sched->decisions), 32);
+
+    rc = xcecli_ctx_init(&(sched->apictx), config);
+    if (rc < 0) {
+        return rc;
+    }
+
+    xcecli_set_handler(sched->apictx, handler, sched);
+
+    rc = xcecli_start(sched->apictx);
+    if (rc < 0) {
+        return rc;
+    }
+
+    return xcecli_join(sched->apictx, HostRole_scheduler, NULL);
+}
+
+void sched_fini(xce_scheduler_t* sched)
+{
+    xcecli_wakeup(sched->apictx, (int)-EINTR);
+    xcecli_stop(sched->apictx);
+    xcecli_ctx_fini(sched->apictx);
+
+    xlist_fini(&(sched->decisions));
+    return;
+}
+
+#if 0
+static int sched_update_config(xce_scheduler_t* sched, xce_conf4sched_t* config)
+{
+    return 0;
+}
+
+static int sched_update_jobs(xce_scheduler_t* sched, int njobs,
+                             xce_job_t** jobs)
+{
+    return 0;
+}
+
+static int sched_update_workers(xce_scheduler_t* sched, int nworkers,
+                                xce_worker_t** workers)
+{
+    return 0;
+}
+#endif
+
+int sched_update(xce_scheduler_t* sched) { return 0; }
+
+static xce_job_t* pick_job(xce_scheduler_t* sched) { return NULL; }
+
+static int calc_job_decision(xce_scheduler_t* sched, xce_job_t* job,
+                             xce_decision_t** decision)
+{
+    *decision = NULL;
+
+    return 0;
+}
+
+int sched_go(xce_scheduler_t* sched)
+{
+    uint32_t njobs = 0;
+
+    while (1) {
+        xce_job_t*      job      = NULL;
+        xce_decision_t* decision = NULL;
+        int             rc       = 0;
+
+        job = pick_job(sched);
+        if (job == NULL) {
+            return njobs;
+        }
+
+        rc = calc_job_decision(sched, job, &decision);
+        if (rc > 0) {
+            njobs++;
+            /* put decision of output list */
+        }
+    }
+    return 0;
+}