irmd: Move registry to its own sources

All registry functionality has been extracted from the IRMd to improve
modularity and legibility of the code.

1 files changed, 148 insertions, 0 deletions

diff --git a/src/irmd/registry.h b/src/irmd/registry.h
new file mode 100644
index 00000000..36b68dcd
--- /dev/null
+++ b/src/irmd/registry.h
@@ -0,0 +1,148 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * The IPC Resource Manager - Registry
+ *
+ *    Dimitri Staessens <dimitri.staessens@intec.ugent.be>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef OUROBOROS_IRMD_REGISTRY_H
+#define OUROBOROS_IRMD_REGISTRY_H
+
+#include <ouroboros/list.h>
+
+#include <stdint.h>
+#include <pthread.h>
+#include <sys/types.h>
+
+#define reg_entry_has_api(e, id) (reg_entry_get_reg_instance(e, id) != NULL)
+#define reg_entry_has_ap_name(e, name) (reg_entry_get_ap_name(e, name) != NULL)
+#define reg_entry_has_ap_auto(e, name) (reg_entry_get_reg_auto(e, name) != NULL)
+
+enum reg_name_state {
+        REG_NAME_NULL = 0,
+        REG_NAME_IDLE,
+        REG_NAME_AUTO_ACCEPT,
+        REG_NAME_AUTO_EXEC,
+        REG_NAME_FLOW_ACCEPT,
+        REG_NAME_FLOW_ARRIVED
+};
+
+enum reg_i_state {
+        REG_I_NULL = 0,
+        REG_I_SLEEP,
+        REG_I_WAKE
+};
+
+struct reg_instance {
+        struct list_head next;
+        pid_t            api;
+
+        /* the api will block on this */
+        enum reg_i_state state;
+        pthread_cond_t   wakeup;
+        pthread_mutex_t  mutex;
+};
+
+/* an entry in the registry */
+struct reg_entry {
+        struct list_head next;
+
+        /* generic name */
+        char * name;
+
+        /* names of the aps that can listen to this name */
+        struct list_head ap_names;
+
+        enum reg_name_state state;
+
+        uint32_t flags;
+
+        /* auto execution info */
+        struct list_head auto_ap_info;
+
+        /* known instances */
+        struct list_head ap_instances;
+
+        char * req_ae_name;
+        int    response;
+
+        pthread_cond_t  acc_signal;
+        pthread_mutex_t state_lock;
+};
+
+struct reg_auto {
+        struct list_head next;
+        char * ap_name;
+        char ** argv;
+};
+
+struct reg_ap_name {
+        struct list_head next;
+        char * ap_name;
+};
+
+struct reg_instance * reg_instance_create(pid_t api);
+void                  reg_instance_destroy(struct reg_instance * i);
+
+void                  reg_instance_sleep(struct reg_instance * i);
+void                  reg_instance_wake(struct reg_instance * i);
+
+struct reg_entry *    reg_entry_create();
+struct reg_entry *    reg_entry_init(struct reg_entry * e,
+                                     char *             name,
+                                     char *             ap_name,
+                                     uint32_t           flags);
+void                  reg_entry_destroy(struct reg_entry * e);
+
+struct reg_ap_name *  reg_entry_get_ap_name(struct reg_entry * e,
+                                            char *             ap_name);
+struct reg_instance * reg_entry_get_reg_instance(struct reg_entry * e,
+                                                 pid_t              api);
+
+struct reg_auto *     reg_entry_get_reg_auto(struct reg_entry * e,
+                                             char *             ap_name);
+pid_t                 reg_entry_resolve_api(struct reg_entry * e);
+char **               reg_entry_resolve_auto(struct reg_entry * e);
+
+int                   registry_add_entry(struct list_head * registry,
+                                         char *             name,
+                                         char *             ap_name,
+                                         uint16_t           flags);
+int                   registry_add_ap_auto(struct list_head * registry,
+                                           char *             name,
+                                           char *             ap_name,
+                                           char **            argv);
+int                   registry_remove_ap_auto(struct list_head * registry,
+                                              char *             name,
+                                              char *             ap_name);
+struct reg_instance * registry_add_ap_instance(struct list_head * registry,
+                                               char *             name,
+                                               pid_t              api);
+int                   registry_remove_ap_instance(struct list_head * registry,
+                                                  char *             name,
+                                                  pid_t              api);
+struct reg_entry *    registry_get_entry_by_name(struct list_head * registry,
+                                                 char *             name);
+struct reg_entry *    registry_get_entry_by_ap_name(struct list_head * registry,
+                                                    char *             ap_name);
+struct reg_entry *    registry_get_entry_by_ap_id(struct list_head * registry,
+                                                  pid_t              api);
+void                  registry_del_name(struct list_head * registry,
+                                        char *             name);
+
+#endif