Typedef bt_intern_str

[babeltrace.git] / lib / context.c

diff --git a/lib/context.c b/lib/context.c
index 36efc9d0c9fc451bd88b598077335739aed4d336..90d77df88f6840af5a954616048f5fbc0f81c631 100644 (file)
--- a/lib/context.c
+++ b/lib/context.c
@@ -21,56 +21,127 @@
 
 #include <babeltrace/babeltrace.h>
 #include <babeltrace/context.h>
+#include <babeltrace/context-internal.h>
+#include <babeltrace/trace-handle.h>
+#include <babeltrace/trace-handle-internal.h>
+#include <babeltrace/trace-collection.h>
+#include <babeltrace/format.h>
 #include <stdlib.h>
 
-struct bt_context *bt_context_create(struct trace_collection *tc)
+#include <fts.h>
+#include <fcntl.h> /* For O_RDONLY */
+
+/* TODO ybrosseau: should be hidden in the CTF format */
+#include <babeltrace/ctf/types.h> /* for ctf_move_pos_slow */
+
+#include <glib.h>
+
+struct bt_context *bt_context_create(void)
 {
        struct bt_context *ctx;
 
-       ctx = calloc(1, sizeof(struct bt_context));
-       if (ctx == NULL) {
-               perror("allocating context");
-               goto error;
-       }
-
-       ctx->tc = tc;
+       ctx = g_new0(struct bt_context, 1);
        ctx->refcount = 1;
+       /* Negative handle id are errors. */
+       ctx->last_trace_handle_id = 0;
 
-       return ctx;
+       /* Instanciate the trace handle container */
+       ctx->trace_handles = g_hash_table_new_full(g_direct_hash,
+                               g_direct_equal, NULL,
+                               (GDestroyNotify) bt_trace_handle_destroy);
 
-error:
-       return NULL;
+       ctx->tc = g_new0(struct trace_collection, 1);
+       init_trace_collection(ctx->tc);
+
+       return ctx;
 }
 
-int bt_context_destroy(struct bt_context *ctx)
+int bt_context_add_trace(struct bt_context *ctx, const char *path,
+               const char *format_str)
 {
-       if (ctx) {
-               if (ctx->refcount >= 1)
-                       goto ctx_used;
+       struct trace_descriptor *td;
+       struct format *fmt;
+       struct bt_trace_handle *handle;
+       int ret;
+
+       fmt = bt_lookup_format(g_quark_from_string(format_str));
+       td = fmt->open_trace(path, O_RDONLY,
+                            ctf_move_pos_slow, NULL);
+       if (!td) {
+               fprintf(stderr, "[error] [Context] Cannot open_trace of the format %s .\n\n",
+                               path);
+               ret = -1;
+               goto end;
+       }
 
-               free(ctx);
+       /* Create an handle for the trace */
+       handle = bt_trace_handle_create(ctx);
+       if (handle < 0) {
+               fprintf(stderr, "[error] [Context] Creating trace handle %s .\n\n",
+                               path);
+               ret = -1;
+               goto end;
        }
-       return 0;
+       handle->format = fmt;
+       handle->td = td;
+       strncpy(handle->path, path, PATH_MAX);
+       handle->path[PATH_MAX - 1] = '\0';
 
-ctx_used:
-       return -1;
+       /* Add new handle to container */
+       g_hash_table_insert(ctx->trace_handles,
+               (gpointer) (unsigned long) handle->id,
+               handle);
+       ret = trace_collection_add(ctx->tc, td);
+       if (ret == 0)
+               return handle->id;
+end:
+       return ret;
 }
 
-int bt_context_get(struct bt_context *ctx)
+void bt_context_remove_trace(struct bt_context *ctx, int handle_id)
 {
-       if (!ctx)
-               return -1;
-       ctx->refcount++;
-       return 0;
+       struct bt_trace_handle *handle;
+
+       handle = g_hash_table_lookup(ctx->trace_handles,
+               (gpointer) (unsigned long) handle_id);
+       assert(handle != NULL);
+
+       /* Remove from containers */
+       trace_collection_remove(ctx->tc, handle->td);
+       g_hash_table_remove(ctx->trace_handles,
+               (gpointer) (unsigned long) handle_id);
+
+       /* Close the trace */
+       handle->format->close_trace(handle->td);
+
+       /* Destory the handle */
+       bt_trace_handle_destroy(handle);
 }
 
-int bt_context_put(struct bt_context *ctx)
+static
+void bt_context_destroy(struct bt_context *ctx)
 {
-       if (!ctx)
-               return -1;
+       finalize_trace_collection(ctx->tc);
+
+       /* Remote all traces. The g_hash_table_destroy will call
+        * bt_trace_handle_destroy on each elements.
+        */
+       g_hash_table_destroy(ctx->trace_handles);
+
+       /* ctx->tc should always be valid */
+       assert(ctx->tc != NULL);
+       g_free(ctx->tc);
+       g_free(ctx);
+}
 
+void bt_context_get(struct bt_context *ctx)
+{
+       ctx->refcount++;
+}
+
+void bt_context_put(struct bt_context *ctx)
+{
        ctx->refcount--;
        if (ctx->refcount == 0)
-               return bt_context_destroy(ctx);
-       return 0;
+               bt_context_destroy(ctx);
 }