backend.h : doxygen comments

src/backend.h

@@ -10,25 +10,49 @@
 #include "config.h"
 #include "log.h"
 
+/** backend module definition */
 typedef struct f2b_backend_t {
-  void *h;
-  void *cfg;
+  void *h;   /**< dlopen handler */
+  void *cfg; /**< opaque pointer of module config */
+  /* handlers */
+  /** dlsym pointer to handler of @a create command */
   void *(*create)  (const char *id);
+  /** dlsym pointer to handler of @a config command */
   bool  (*config)  (void *cfg, const char *key, const char *value);
+  /** dlsym pointer to handler of @a ready command */
   bool  (*ready)   (void *cfg);
+  /** dlsym pointer to handler of @a error command */
   char *(*error)   (void *cfg);
+  /** dlsym pointer to handler of @a start command */
   bool  (*start)   (void *cfg);
+  /** dlsym pointer to handler of @a stop command */
   bool  (*stop)    (void *cfg);
+  /** dlsym pointer to handler of @a ping command */
   bool  (*ping)    (void *cfg);
+  /** dlsym pointer to handler of @a ban command */
   bool  (*ban)     (void *cfg, const char *ip);
+  /** dlsym pointer to handler of @a check command */
   bool  (*check)   (void *cfg, const char *ip);
+  /** dlsym pointer to handler of @a unban command */
   bool  (*unban)   (void *cfg, const char *ip);
+  /** dlsym pointer to handler of @a destroy command */
   void  (*destroy) (void *cfg);
 } f2b_backend_t;
 
+/**
+ * @brief Create module from config
+ * @param config Pointer to section of config
+ * @param init   Module init string
+ * @returns Pointer to module metadata of NULL on error
+ */
 f2b_backend_t * f2b_backend_create (f2b_config_section_t *config, const char *id);
+/**
+ * @brief Free module metadata
+ * @param b Pointer to module struct
+ */
 void f2b_backend_destroy(f2b_backend_t *b);
 
+/* helpers */
 const char *
      f2b_backend_error (f2b_backend_t *b);
 bool f2b_backend_start (f2b_backend_t *b);