X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=db.h;h=3347d3ad239d5fd2d364c99083278f0b0b967a8e;hp=960bf59f2e2a6bce0bf9300e68303031f47b2a63;hb=126ff375933fbe83d35e67aeaa2d145be1bc3af5;hpb=2ed89c59f0efcd0a2763f47c7d3455663241e623

diff --git a/db.h b/db.h
index 960bf59f..3347d3ad 100644
--- a/db.h
+++ b/db.h
@@ -18,6 +18,15 @@
 
 /** \file db.h data structures common to all database tools */
 
+#include <sys/select.h>
+
+enum supported_dbtools {DBT_DOPEY,
+#ifdef HAVE_MYSQL
+	DBT_MYSQL,
+#endif
+	NUM_DBTOOLS
+};
+
 int find_audio_files(const char *dirname, int (*f)(const char *, const char *));
 
 /**
@@ -78,7 +87,7 @@ char **(*get_audio_file_list)(unsigned int num);
  * passed \a update_audio_file().
  *
  */
-void  (*update_audio_file)(char *audio_file);
+void (*update_audio_file)(char *audio_file);
 /**
  *
  * shutdown this database tool and free all resources
@@ -86,10 +95,36 @@ void  (*update_audio_file)(char *audio_file);
  * This gets called whenever the database tool changes (via the cdt command),
  * or when para_server receives the HUP signal, or when para_server shuts down.
  * It is assumed to succeed.
-*/
+ */
 void (*shutdown)(void);
+/**
+ *
+ * add file descriptors to fd_sets
+ *
+ * The pre_select function of the activated database tool gets called just
+ * before para_server enters its main select loop. The dbtool may add its own
+ * file descriptors to the \a rfds or the \a wfds set.
+ *
+ * If a file descriptor was added, \a max_fileno must be increased by
+ * this function, if neccessary.
+ *
+ * \sa select(2)
+ */
+int (*pre_select)(fd_set *rfds, fd_set *wfds);
+/**
+ * handle the file descriptors which are ready for I/O
+ *
+ * If the pre_select hook added one ore more file descriptors to the read or write
+ * set, this is the hook to check the result and do any I/O on those descriptors
+ * which are ready for reading/writing.
+ */
+void (*post_select)(fd_set *rfds, fd_set *wfds);
+/**
+ * each dbtool has its private data pointer */
+void *private_data;
 };
 
 int mysql_dbtool_init(struct dbtool*);
-int dopey_dbtool_init(struct dbtool*);
+int plm_dbtool_init(struct dbtool*);
+int random_dbtool_init(struct dbtool*);