write_common: get rid of POST_ADD_TAIL

[paraslash.git] / write_common.c

diff --git a/write_common.c b/write_common.c
index 7fb8d12337b6fdc28a1af741e5a0cd6a74f21ea4..a28a1052564ca308cf343ccb5d6f08fdebf91d92 100644 (file)
--- a/write_common.c
+++ b/write_common.c
@@ -37,17 +37,20 @@ static void wng_post_select(__a_unused struct sched *s, struct task *t)
        FOR_EACH_WRITER_NODE(i, g) {
                struct writer_node *wn = &g->writer_nodes[i];
                t->ret = wn->task.ret;
-               if (t->ret < 0)
+               if (t->ret < 0) {
+                       g->eof = 1;
                        return;
+               }
                if (!i)
                        min_written = t->ret;
                else
                        min_written = PARA_MIN(min_written, t->ret);
        }
        *g->loaded -= min_written;
-       if (!*g->loaded && *g->input_eof)
+       if (!*g->loaded && *g->input_eof) {
+               g->eof = 1;
                t->ret = -E_WNG_EOF;
-       else
+       } else
                t->ret = 1;
        if (*g->loaded && min_written)
                memmove(g->buf, g->buf + min_written, *g->loaded);
@@ -57,16 +60,16 @@ int wng_open(struct writer_node_group *g)
 {
        int i, ret = 1;
 
+       PARA_NOTICE_LOG("opening wng %p with %d writer(s)\n", g, g->num_writers);
+       register_task(&g->task);
        FOR_EACH_WRITER_NODE(i, g) {
                struct writer_node *wn = &g->writer_nodes[i];
+               wn->wng = g;
                ret = wn->writer->open(wn);
                if (ret < 0)
-                       goto out;
+                       goto err_out;
                wn->chunk_bytes = ret;
                g->max_chunk_bytes = PARA_MAX(g->max_chunk_bytes, ret);
-               wn->wng = g;
-               PARA_DEBUG_LOG("pre_select: %p\n", &wn->writer->pre_select);
-               PARA_DEBUG_LOG("post_select: %p\n", &wn->writer->post_select);
                wn->task.pre_select = wn->writer->pre_select;
                wn->task.post_select = wn->writer->post_select;
                wn->task.private_data = wn;
@@ -74,29 +77,45 @@ int wng_open(struct writer_node_group *g)
        }
        sprintf(g->task.status, "%s", "writer node group");
        g->eof = 0;
-       register_task(&g->task);
-out:
+       return 1;
+err_out:
+       unregister_task(&g->task);
+       while (i > 0) {
+               struct writer_node *wn = &g->writer_nodes[--i];
+               unregister_task(&wn->task);
+               wn->writer->close(wn);
+       }
+       g->num_writers = 0;
+       g->eof = 1;
        return ret;
 }
 
-void wng_destroy(struct writer_node_group *g)
+void wng_unregister(struct writer_node_group *g)
 {
-       if (!g)
-               return;
-       free(g->written);
-       free(g->writer_nodes);
-       free(g);
+       int i;
+
+       FOR_EACH_WRITER_NODE(i, g) {
+               struct writer_node *wn = &g->writer_nodes[i];
+               unregister_task(&wn->task);
+       }
+       unregister_task(&g->task);
+       g->eof = 1;
 }
 
 void wng_close(struct writer_node_group *g)
 {
        int i;
 
+       if (!g)
+               return;
+       PARA_NOTICE_LOG("closing wng with %d writer(s)\n", g->num_writers);
        FOR_EACH_WRITER_NODE(i, g) {
                struct writer_node *wn = &g->writer_nodes[i];
-               unregister_task(&wn->task);
                wn->writer->close(wn);
        }
+       free(g->written);
+       free(g->writer_nodes);
+       free(g);
 }
 
 struct writer_node_group *wng_new(unsigned num_writers)
@@ -108,7 +127,7 @@ struct writer_node_group *wng_new(unsigned num_writers)
        g->written = para_calloc(num_writers * sizeof(size_t));
        g->task.private_data = g;
        g->task.post_select = wng_post_select;
-       g->task.flags = POST_ADD_TAIL;
+       g->task.flags = 0;
        return g;
 }