X-Git-Url: http://git.efficios.com/?p=babeltrace.git;a=blobdiff_plain;f=lib%2Fcontext.c;h=1311b5c2a0e684e81d51fb2adf688e3db66bf5d4;hp=36efc9d0c9fc451bd88b598077335739aed4d336;hb=634d474be8d4262f5a3e549cdb6891de239f4fe4;hpb=b469d2dd9c6770cbdce9304dbb0e2c7ed8304b2a

diff --git a/lib/context.c b/lib/context.c
index 36efc9d0..1311b5c2 100644
--- a/lib/context.c
+++ b/lib/context.c
@@ -21,56 +21,134 @@
 
 #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 <babeltrace/babeltrace-internal.h>
 #include <stdlib.h>
+#include <string.h>
+#include <assert.h>
 
-struct bt_context *bt_context_create(struct trace_collection *tc)
+#include <fts.h>
+#include <fcntl.h> /* For O_RDONLY */
+
+#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);
+
+	ctx->tc = g_new0(struct trace_collection, 1);
+	init_trace_collection(ctx->tc);
 
-error:
-	return NULL;
+	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_name,
+		void (*packet_seek)(struct stream_pos *pos, size_t index,
+			int whence))
 {
-	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_name));
+	if (!fmt) {
+		fprintf(stderr, "[error] [Context] Format \"%s\" unknown.\n\n",
+			format_name);
+		ret = -1;
+		goto end;
+	}
+	td = fmt->open_trace(path, O_RDONLY, packet_seek, 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);
 }