aft.c: Check for osl errors in com_add_callback().

[paraslash.git] / mood.c

diff --git a/mood.c b/mood.c
index 55eb41c0c70a5dbb0c8cf6283d80acc769cbc5d0..d29c62c22b396ac685f140b9d936f041184ca5d3 100644 (file)
--- a/mood.c
+++ b/mood.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2007-2013 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2007 Andre Noll <maan@tuebingen.mpg.de>
  *
  * Licensed under the GPL v2. For licencing details see COPYING.
  */
@@ -30,7 +30,7 @@ struct afs_statistics {
        int64_t num_played_sum;
        /** Sum of last played times over all admissible files. */
        int64_t last_played_sum;
-       /** Quadratic deviation of num played time. */
+       /** Quadratic deviation of num played count. */
        int64_t num_played_qd;
        /** Quadratic deviation of last played time. */
        int64_t last_played_qd;
@@ -410,20 +410,18 @@ static int check_mood(struct osl_row *mood_row, void *data)
        int ret = mood_get_name_and_def_by_row(mood_row, &mood_name, &mood_def);
 
        if (ret < 0) {
-               para_printf(pb, "failed to get mood definition: %s\n",
-                       para_strerror(-ret));
+               para_printf(pb, "cannot read mood\n");
                return ret;
        }
        if (!*mood_name) /* ignore dummy row */
                goto out;
-       ret = para_printf(pb, "checking mood %s...\n", mood_name);
-       if (ret < 0)
-               goto out;
+       para_printf(pb, "checking mood %s...\n", mood_name);
        ret = for_each_line(FELF_READ_ONLY, mood_def.data, mood_def.size,
                parse_mood_line, &mlpd);
        if (ret < 0)
-               para_printf(pb, "%s line %u: %s\n", mood_name, mlpd.line_num,
-                       para_strerror(-ret));
+               para_printf(pb, "mood %s: error in line %u: %s\n", mood_name,
+                       mlpd.line_num, para_strerror(-ret));
+       ret = 1; /* don't fail the loop on invalid mood definitions */
 out:
        osl_close_disk_object(&mood_def);
        return ret;
@@ -432,28 +430,16 @@ out:
 /**
  * Check all moods for syntax errors.
  *
- * \param fd The afs socket.
- * \param query Unused.
+ * \param aca Only ->pbout is used for diagnostics.
+ *
+ * \return Negative on fatal errors. Inconsistent mood definitions are not
+ * considered an error.
  */
-void mood_check_callback(int fd, __a_unused const struct osl_object *query)
+int mood_check_callback(struct afs_callback_arg *aca)
 {
-       struct para_buffer pb = {
-               .max_size = shm_get_shmmax(),
-               .private_data = &(struct afs_max_size_handler_data) {
-                       .fd = fd,
-                       .band = SBD_OUTPUT
-               },
-               .max_size_handler = afs_max_size_handler
-       };
-
-       int ret = para_printf(&pb, "checking moods...\n");
-       if (ret < 0)
-               return;
-       osl_rbtree_loop(moods_table, BLOBCOL_ID, &pb,
-               check_mood);
-       if (pb.offset)
-               pass_buffer_as_shm(fd, SBD_OUTPUT, pb.buf, pb.offset);
-       free(pb.buf);
+       para_printf(&aca->pbout, "checking moods...\n");
+       return osl(osl_rbtree_loop(moods_table, BLOBCOL_ID, &aca->pbout,
+               check_mood));
 }
 
 static int64_t normalized_value(int64_t x, int64_t n, int64_t sum, int64_t qd)
@@ -535,16 +521,16 @@ static int del_afs_statistics(const struct osl_row *row)
 /**
  * Structure used during mood_open().
  *
- * At mood open time, we look at each file in the audio file table in order to
- * determine whether it is admissible. If a file happens to be admissible, its
- * mood score is computed by calling each relevant mood_score_function. Next,
- * we update the afs_statistics and add a struct admissible_file_info to a
- * temporary array.
+ * At mood open time we determine the set of admissible files for the given
+ * mood. The mood score of each admissible file is computed by adding up all
+ * mood item scores. Next, we update the afs statistics and append a struct
+ * admissible_file_info to a temporary array.
  *
- * If all files have been processed that way, the final score of each
+ * When all files have been processed in this way, the final score of each
  * admissible file is computed by adding the dynamic score (which depends on
- * the afs_statistics) to the mood score.  Finally, all audio files in the
- * array are added to the score table and the admissible array is freed.
+ * the afs_statistics and the current time) to the mood score. Finally, all
+ * audio files in the temporary array are added to the score table and the
+ * array is freed.
  *
  * \sa mood_method, admissible_array.
  */
@@ -870,6 +856,9 @@ static int reload_current_mood(void)
        int ret;
        char *mood_name = NULL;
 
+       ret = clear_score_table();
+       if (ret < 0)
+               return ret;
        if (!current_mood)
                return 1;
        PARA_NOTICE_LOG("reloading %s\n", current_mood->name?
@@ -898,8 +887,6 @@ static int reload_current_mood(void)
 int moods_event_handler(enum afs_events event, __a_unused struct para_buffer *pb,
                void *data)
 {
-       int ret;
-
        if (!current_mood)
                return 0;
        switch (event) {
@@ -912,10 +899,6 @@ int moods_event_handler(enum afs_events event, __a_unused struct para_buffer *pb
        case BLOB_ADD:
                if (data == moods_table || data == playlists_table)
                        return 1; /* no reload necessary for these */
-               ret = clear_score_table();
-               if (ret < 0)
-                       PARA_CRIT_LOG("clear score table returned %s\n",
-                               para_strerror(-ret));
                return reload_current_mood();
        /* these also require reload of the score table */
        case ATTRIBUTE_ADD: