Feature: Added infrastructure for modules. Currently not used by Icecast at all.

src/Makefile.am

@@ -30,6 +30,7 @@ noinst_HEADERS = \
     matchfile.h \
     tls.h \
     refobject.h \
+    module.h \
     event.h \
     event_log.h \
     event_exec.h \
@@ -70,6 +71,7 @@ icecast_SOURCES = \
     matchfile.c \
     tls.c \
     refobject.c \
+    module.c \
     format.c \
     format_ogg.c \
     format_mp3.c \

src/icecasttypes.h

@@ -92,6 +92,12 @@ typedef enum {
 
 typedef struct _relay_server relay_server;
 
+/* ---[ module.[ch] ]--- */
+
+typedef struct module_tag module_t;
+
+typedef struct module_container_tag module_container_t;
+
 /* ---[ refobject.[ch] ]--- */
 
 typedef struct refobject_base_tag refobject_base_t;
@@ -99,6 +105,8 @@ typedef struct refobject_base_tag refobject_base_t;
 #ifdef HAVE_TYPE_ATTRIBUTE_TRANSPARENT_UNION
 typedef union __attribute__ ((__transparent_union__)) {
     refobject_base_t *refobject_base;
+    module_t *module;
+    module_container_t *module_container;
 } refobject_t;
 #else
 typedef void * refobject_t;

src/module.c

@@ -0,0 +1,160 @@
+/* Icecast
+ *
+ * This program is distributed under the GNU General Public License, version 2.
+ * A copy of this license is included with this source.
+ *
+ * Copyright 2018,      Philipp "ph3-der-loewe" Schafft <lion@lion.leolix.org>,
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <string.h>
+
+#include "common/thread/thread.h"
+#include "common/avl/avl.h"
+
+#include "refobject.h"
+#include "module.h"
+
+struct module_tag {
+    refobject_base_t __base;
+    mutex_t lock;
+    const module_client_handler_t *client_handlers;
+    size_t client_handlers_len;
+};
+
+
+struct module_container_tag {
+    refobject_base_t __base;
+    mutex_t lock;
+    avl_tree *module;
+};
+
+static int compare_refobject_t_name(void *arg, void *a, void *b)
+{
+    return strcmp(refobject_get_name(a), refobject_get_name(b));
+}
+
+static void __module_container_free(refobject_t self, void **userdata)
+{
+    module_container_t *cont = REFOBJECT_TO_TYPE(self, module_container_t *);
+    thread_mutex_destroy(&(cont->lock));
+    avl_tree_free(cont->module, (avl_free_key_fun_type)refobject_unref);
+}
+
+module_container_t *    module_container_new(void)
+{
+    module_container_t *ret = REFOBJECT_TO_TYPE(refobject_new(sizeof(module_container_t), __module_container_free, NULL, NULL, NULL), module_container_t *);
+
+    if (!ret)
+        return NULL;
+
+    thread_mutex_create(&(ret->lock));
+
+    ret->module = avl_tree_new(compare_refobject_t_name, NULL);
+
+    return ret;
+}
+
+int                     module_container_add_module(module_container_t *self, module_t *module)
+{
+    if (!self)
+        return -1;
+
+    thread_mutex_lock(&(self->lock));
+    avl_insert(self->module, module);
+    thread_mutex_unlock(&(self->lock));
+
+    return 0;
+}
+
+int                     module_container_delete_module(module_container_t *self, const char *name)
+{
+    module_t *module;
+
+    if (!self || !name)
+        return -1;
+
+    module = module_container_get_module(self, name);
+    if (!module)
+        return -1;
+
+    thread_mutex_lock(&(self->lock));
+    avl_delete(self->module, module, (avl_free_key_fun_type)refobject_unref);
+    thread_mutex_unlock(&(self->lock));
+
+    refobject_unref(module);
+
+    return 0;
+}
+
+module_t *              module_container_get_module(module_container_t *self, const char *name)
+{
+    refobject_t search;
+    module_t *ret;
+
+    if (!self || !name)
+        return NULL;
+
+    search = refobject_new(sizeof(refobject_base_t), NULL, NULL, name, NULL);
+
+    if (avl_get_by_key(self->module, REFOBJECT_TO_TYPE(search, void *), (void**)&ret) != 0) {
+        ret = NULL;
+    }
+
+    refobject_unref(search);
+
+    return ret;
+}
+
+static void __module_free(refobject_t self, void **userdata)
+{
+    module_t *mod = REFOBJECT_TO_TYPE(self, module_t *);
+    thread_mutex_destroy(&(mod->lock));
+}
+
+module_t *              module_new(const char *name, module_setup_handler_t newcb, module_setup_handler_t freecb, void *userdata)
+{
+    module_t *ret = REFOBJECT_TO_TYPE(refobject_new(sizeof(module_t), __module_free, NULL, name, NULL), module_t *);
+
+    if (!ret)
+        return NULL;
+
+    thread_mutex_create(&(ret->lock));
+
+    return ret;
+}
+
+const module_client_handler_t * module_get_client_handler(module_t *self, const char *name)
+{
+    size_t i;
+
+    if (!self || !name)
+        return NULL;
+
+    thread_mutex_lock(&(self->lock));
+    for (i = 0; i < self->client_handlers_len; i++) {
+        if (self->client_handlers[i].name && strcmp(self->client_handlers[i].name, name) == 0) {
+            thread_mutex_unlock(&(self->lock));
+            return &(self->client_handlers[i]);
+        }
+    }
+    thread_mutex_unlock(&(self->lock));
+
+    return NULL;
+}
+
+int                             module_add_client_handler(module_t *self, const module_client_handler_t *handlers, size_t len)
+{
+    if (!self)
+        return -1;
+
+    thread_mutex_lock(&(self->lock));
+    self->client_handlers = handlers;
+    self->client_handlers_len = len;
+    thread_mutex_unlock(&(self->lock));
+
+    return 0;
+}

src/module.h

@@ -0,0 +1,33 @@
+/* Icecast
+ *
+ * This program is distributed under the GNU General Public License, version 2.
+ * A copy of this license is included with this source.
+ *
+ * Copyright 2018,      Philipp "ph3-der-loewe" Schafft <lion@lion.leolix.org>,
+ */
+
+#ifndef __MODULE_H__
+#define __MODULE_H__
+
+#include "icecasttypes.h"
+
+typedef void (*module_client_handler_function_t)(module_t *self, client_t *client, const char *uri);
+typedef int  (*module_setup_handler_t)(module_t *self, void **userdata);
+
+typedef struct {
+    const char *name;
+    module_client_handler_function_t cb;
+} module_client_handler_t;
+
+module_container_t *            module_container_new(void);
+int                             module_container_add_module(module_container_t *self, module_t *module);
+int                             module_container_delete_module(module_container_t *self, const char *name);
+module_t *                      module_container_get_module(module_container_t *self, const char *name);
+
+module_t *                      module_new(const char *name, module_setup_handler_t newcb, module_setup_handler_t freecb, void *userdata);
+
+/* Note: Those functions are not really thread safe as (module_client_handler_t) is not thread safe. This is by design. */
+const module_client_handler_t * module_get_client_handler(module_t *self, const char *name);
+int                             module_add_client_handler(module_t *self, const module_client_handler_t *handlers, size_t len);
+
+#endif