irmd: Move registry objects to their own sources

Rename internal data structures so it's clear that they are the IRMd
representation of these objects for management purposes.

Split functionality for these objects off and and move them to their
own source files.

Rename internal functions of the IRMd to reflect this, with some small
refactoring.

Signed-off-by: Dimitri Staessens <[email protected]>
Signed-off-by: Sander Vrijders <[email protected]>

1 files changed, 152 insertions, 0 deletions

diff --git a/src/irmd/reg/ipcp.c b/src/irmd/reg/ipcp.c
new file mode 100644
index 00000000..62505871
--- /dev/null
+++ b/src/irmd/reg/ipcp.c
@@ -0,0 +1,152 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2023
+ *
+ * The IPC Resource Manager - Registry - IPCPs
+ *
+ *    Dimitri Staessens <[email protected]>
+ *    Sander Vrijders   <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., http://www.fsf.org/about/contact/.
+ */
+
+#if defined(__linux__) || defined(__CYGWIN__)
+#define _DEFAULT_SOURCE
+#else
+#define _POSIX_C_SOURCE 200809L
+#endif
+
+#include "config.h"
+
+#include <ouroboros/errno.h>
+#include <ouroboros/hash.h>
+#include <ouroboros/ipcp.h>
+#include <ouroboros/pthread.h>
+#include <ouroboros/time_utils.h>
+
+#include "ipcp.h"
+
+#include <assert.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+
+struct reg_ipcp * reg_ipcp_create(const char *   name,
+                                  enum ipcp_type type)
+{
+        struct reg_ipcp *  ipcp;
+        pthread_condattr_t cattr;
+
+        ipcp = malloc(sizeof(*ipcp));
+        if (ipcp == NULL)
+                goto fail_malloc;
+
+        if (pthread_mutex_init(&ipcp->mtx, NULL))
+                goto fail_mutex;
+
+        if (pthread_condattr_init(&cattr))
+                goto fail_cattr;
+#ifndef __APPLE__
+        pthread_condattr_setclock(&cattr, PTHREAD_COND_CLOCK);
+#endif
+        if (pthread_cond_init(&ipcp->cond, &cattr))
+                goto fail_cond;
+
+        ipcp->name = strdup(name);
+        if (ipcp->name == NULL)
+                goto fail_name;
+
+        pthread_condattr_destroy(&cattr);
+
+        ipcp->layer = NULL;
+        ipcp->type  = type;
+        ipcp->state = IPCP_BOOT;
+
+        list_head_init(&ipcp->next);
+
+        return ipcp;
+
+ fail_name:
+        pthread_cond_destroy(&ipcp->cond);
+ fail_cond:
+        pthread_condattr_destroy(&cattr);
+ fail_cattr:
+        pthread_mutex_destroy(&ipcp->mtx);
+ fail_mutex:
+        free(ipcp);
+ fail_malloc:
+        return NULL;
+}
+
+void reg_ipcp_destroy(struct reg_ipcp * ipcp)
+{
+        assert(ipcp);
+
+        pthread_mutex_lock(&ipcp->mtx);
+
+        while (ipcp->state == IPCP_BOOT)
+                pthread_cond_wait(&ipcp->cond, &ipcp->mtx);
+
+        free(ipcp->layer);
+        free(ipcp->name);
+
+        pthread_mutex_unlock(&ipcp->mtx);
+
+        pthread_cond_destroy(&ipcp->cond);
+        pthread_mutex_destroy(&ipcp->mtx);
+
+        free(ipcp);
+}
+
+void reg_ipcp_set_state(struct reg_ipcp * ipcp,
+                        enum ipcp_state   state)
+{
+        pthread_mutex_lock(&ipcp->mtx);
+
+        ipcp->state = state;
+        pthread_cond_broadcast(&ipcp->cond);
+
+        pthread_mutex_unlock(&ipcp->mtx);
+}
+
+int reg_ipcp_wait_boot(struct reg_ipcp * ipcp)
+{
+        int             ret = 0;
+        struct timespec dl;
+        struct timespec to = {SOCKET_TIMEOUT / 1000,
+                              (SOCKET_TIMEOUT % 1000) * MILLION};
+
+        clock_gettime(PTHREAD_COND_CLOCK, &dl);
+        ts_add(&dl, &to, &dl);
+
+        pthread_mutex_lock(&ipcp->mtx);
+
+        while (ipcp->state == IPCP_BOOT && ret != ETIMEDOUT)
+                ret = pthread_cond_timedwait(&ipcp->cond, &ipcp->mtx, &dl);
+
+        if (ret == ETIMEDOUT) {
+                kill(ipcp->pid, SIGTERM);
+                ipcp->state = IPCP_NULL;
+                pthread_cond_signal(&ipcp->cond);
+        }
+
+        if (ipcp->state != IPCP_LIVE) {
+                pthread_mutex_unlock(&ipcp->mtx);
+                return -1;
+        }
+
+        pthread_mutex_unlock(&ipcp->mtx);
+
+        return 0;
+}