Introduce contexts

[babeltrace.git] / include / babeltrace / format.h

diff --git a/include/babeltrace/format.h b/include/babeltrace/format.h
index 7162c0ea0822cbb2320317407aa1be87d0020f5e..93d1e25146495920c40537b942d556b54541391c 100644 (file)
--- a/include/babeltrace/format.h
+++ b/include/babeltrace/format.h
@@ -6,7 +6,9 @@
  *
  * Trace Format Header
  *
- * Copyright 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation
+ *
+ * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -19,61 +21,44 @@
  * all copies or substantial portions of the Software.
  */
 
+#include <babeltrace/types.h>
 #include <stdint.h>
+#include <stdio.h>
 #include <glib.h>
 
-struct format {
-       GQuark name;
+/* forward declaration */
+struct ctf_stream_pos;
 
-       uint64_t (*uint_read)(struct stream_pos *pos,
-                       const struct type_class_integer *int_class);
-       int64_t (*int_read)(struct stream_pos *pos,
-                       const struct type_class_integer *int_class);
-       void (*uint_write)(struct stream_pos *pos,
-                          const struct type_class_integer *int_class,
-                          uint64_t v);
-       void (*int_write)(struct stream_pos *pos,
-                         const struct type_class_integer *int_class,
-                         int64_t v);
+/* Parent trace descriptor */
+struct trace_descriptor {
+};
 
-       void (*float_copy)(struct stream_pos *dest,
-                          struct stream_pos *src,
-                          const struct type_class_float *src);
-       double (*double_read)(struct stream_pos *pos,
-                             const struct type_class_float *float_class);
-       void (*double_write)(struct stream_pos *pos,
-                            const struct type_class_float *float_class,
-                            double v);
+struct mmap_stream {
+       int fd;
+       struct cds_list_head list;
+};
 
-       void (*string_copy)(struct stream_pos *dest, struct stream_pos *src,
-                           const struct type_class_string *string_class);
-       void (*string_read)(unsigned char **dest, struct stream_pos *src,
-                           const struct type_class_string *string_class);
-       void (*string_write)(struct stream_pos *dest, const unsigned char *src,
-                            const struct type_class_string *string_class);
-       void (*string_free_temp)(unsigned char *string);
+struct mmap_stream_list {
+       struct cds_list_head head;
+};
+
+struct format {
+       GQuark name;
 
-       GQuark (*enum_read)(struct stream_pos *pos,
-                           const struct type_class_enum *src);
-       void (*enum_write)(struct stream_pos *pos,
-                          const struct type_class_enum *dest,
-                          GQuark q);
-       void (*struct_begin)(struct stream_pos *pos,
-                            const struct type_class_struct *struct_class);
-       void (*struct_end)(struct stream_pos *pos,
-                          const struct type_class_struct *struct_class);
-       void (*array_begin)(struct stream_pos *pos,
-                            const struct type_class_array *array_class);
-       void (*array_end)(struct stream_pos *pos,
-                          const struct type_class_array *array_class);
-       void (*sequence_begin)(struct stream_pos *pos,
-                            const struct type_class_sequence *sequence_class);
-       void (*sequence_end)(struct stream_pos *pos,
-                          const struct type_class_sequence *sequence_class);
+       struct trace_descriptor *(*open_trace)(const char *collection_path,
+                       const char *path, int flags,
+                       void (*move_pos_slow)(struct ctf_stream_pos *pos, size_t offset,
+                               int whence), FILE *metadata_fp);
+       struct trace_descriptor *(*open_mmap_trace)(
+                       struct mmap_stream_list *mmap_list,
+                       void (*move_pos_slow)(struct ctf_stream_pos *pos, size_t offset,
+                               int whence), FILE *metadata_fp);
+       void (*close_trace)(struct trace_descriptor *descriptor);
 };
 
-struct format *bt_lookup_format(GQuark qname);
-int bt_register_format(const struct format *format);
+extern struct format *bt_lookup_format(GQuark qname);
+extern void bt_fprintf_format_list(FILE *fp);
+extern int bt_register_format(struct format *format);
 
 /* TBD: format unregistration */