From 3c3935dc6d5ba6e4ed33bad1e969aa9888bd3a8a Mon Sep 17 00:00:00 2001
From: Nicolas Dato <nicolas.dato@gmail.com>
Date: Sun, 5 Nov 2023 15:07:12 -0300
Subject: Adding some initial code. utils.c for some auxiliary functions, and
 itc.c for intra-tuberia-communication

---
 src/tuberia.c | 76 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 src/tuberia.c

(limited to 'src/tuberia.c')

diff --git a/src/tuberia.c b/src/tuberia.c
new file mode 100644
index 0000000..3dc5c10
--- /dev/null
+++ b/src/tuberia.c
@@ -0,0 +1,76 @@
+#include "tuberia.h"
+#include "itc.h"
+
+#include <stdlib.h>
+
+struct tube {
+        struct itc *itc;
+};
+
+struct tube_source *tube_source_alloc(int nqueue, tube_fetch *fetch, void *opaque)
+{
+        struct tube_source *source = calloc(1, sizeof(struct tube_source));
+
+        source->nqueue = nqueue;
+        source->fetch = fetch;
+        source->opaque = opaque;
+
+        return source;
+}
+
+struct tube_stage *tube_stage_alloc(int nqueue, tube_process *process, void *opaque)
+{
+        struct tube_stage *stage = calloc(1, sizeof(struct tube_stage));
+
+        stage->nqueue = nqueue;
+        stage->process = process;
+        stage->opaque = opaque;
+
+        return stage;
+}
+
+void tube_stage_free(struct tube_stage **stage)
+{
+        if (stage != NULL) {
+                free(stage);
+                *stage = NULL;
+        }
+}
+
+void tube_source_and_stages_free(struct tube_source **source)
+{
+        struct tube_stage *stage;
+        struct tube_stage *next;
+
+        if (source != NULL && *source != NULL) {
+                stage = (*source)->next;
+                while (stage != NULL) {
+                        next = stage->next;
+                        free(stage);
+                        stage = next;
+                }
+                free(*source);
+                *source = NULL;
+        }
+}
+
+int tube_stage_append(struct tube_source *source, struct tube_stage *stage)
+{
+        struct tube_stage **next;
+
+        if (source != NULL || stage != NULL) {
+                return -1;
+        }
+        next = &(source->next);
+        while (*next != NULL) {
+                next = &((*next)->next);
+        }
+        *next = stage;
+
+        return 0;
+}
+
+tube *tube_create(struct tube_source *source, tube_sink *sink, void *opaque)
+{
+}
+
-- 
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