6 * Copyright 2011-2012 EfficiOS Inc. and Linux Foundation
8 * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
9 * Julien Desfossez <julien.desfossez@efficios.com>
11 * Permission is hereby granted, free of charge, to any person obtaining a copy
12 * of this software and associated documentation files (the "Software"), to deal
13 * in the Software without restriction, including without limitation the rights
14 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
15 * copies of the Software, and to permit persons to whom the Software is
16 * furnished to do so, subject to the following conditions:
18 * The above copyright notice and this permission notice shall be included in
19 * all copies or substantial portions of the Software.
22 #include <babeltrace/babeltrace.h>
23 #include <babeltrace/context.h>
24 #include <babeltrace/context-internal.h>
25 #include <babeltrace/trace-handle.h>
26 #include <babeltrace/trace-handle-internal.h>
27 #include <babeltrace/trace-collection.h>
28 #include <babeltrace/format.h>
29 #include <babeltrace/babeltrace-internal.h>
35 #include <fcntl.h> /* For O_RDONLY */
39 struct bt_context
*bt_context_create(void)
41 struct bt_context
*ctx
;
43 ctx
= g_new0(struct bt_context
, 1);
45 /* Negative handle id are errors. */
46 ctx
->last_trace_handle_id
= 0;
48 /* Instanciate the trace handle container */
49 ctx
->trace_handles
= g_hash_table_new_full(g_direct_hash
,
51 (GDestroyNotify
) bt_trace_handle_destroy
);
53 ctx
->tc
= g_new0(struct trace_collection
, 1);
54 init_trace_collection(ctx
->tc
);
59 int bt_context_add_trace(struct bt_context
*ctx
, const char *path
,
60 const char *format_name
,
61 void (*packet_seek
)(struct stream_pos
*pos
, size_t index
,
63 struct mmap_stream_list
*stream_list
,
66 struct trace_descriptor
*td
;
68 struct bt_trace_handle
*handle
;
71 fmt
= bt_lookup_format(g_quark_from_string(format_name
));
73 fprintf(stderr
, "[error] [Context] Format \"%s\" unknown.\n\n",
79 td
= fmt
->open_trace(path
, O_RDONLY
, packet_seek
, NULL
);
81 fprintf(stderr
, "[error] [Context] Cannot open_trace of the format %s .\n\n",
87 td
= fmt
->open_mmap_trace(stream_list
, packet_seek
, metadata
);
89 fprintf(stderr
, "[error] [Context] Cannot open_trace of the format %s .\n\n",
96 /* Create an handle for the trace */
97 handle
= bt_trace_handle_create(ctx
);
99 fprintf(stderr
, "[error] [Context] Creating trace handle %s .\n\n",
104 handle
->format
= fmt
;
106 strncpy(handle
->path
, path
, PATH_MAX
);
107 handle
->path
[PATH_MAX
- 1] = '\0';
109 /* Add new handle to container */
110 g_hash_table_insert(ctx
->trace_handles
,
111 (gpointer
) (unsigned long) handle
->id
,
113 ret
= trace_collection_add(ctx
->tc
, td
);
120 void bt_context_remove_trace(struct bt_context
*ctx
, int handle_id
)
122 struct bt_trace_handle
*handle
;
124 handle
= g_hash_table_lookup(ctx
->trace_handles
,
125 (gpointer
) (unsigned long) handle_id
);
126 assert(handle
!= NULL
);
128 /* Remove from containers */
129 trace_collection_remove(ctx
->tc
, handle
->td
);
130 g_hash_table_remove(ctx
->trace_handles
,
131 (gpointer
) (unsigned long) handle_id
);
133 /* Close the trace */
134 handle
->format
->close_trace(handle
->td
);
136 /* Destory the handle */
137 bt_trace_handle_destroy(handle
);
141 void bt_context_destroy(struct bt_context
*ctx
)
143 finalize_trace_collection(ctx
->tc
);
145 /* Remote all traces. The g_hash_table_destroy will call
146 * bt_trace_handle_destroy on each elements.
148 g_hash_table_destroy(ctx
->trace_handles
);
150 /* ctx->tc should always be valid */
151 assert(ctx
->tc
!= NULL
);
156 void bt_context_get(struct bt_context
*ctx
)
161 void bt_context_put(struct bt_context
*ctx
)
164 if (ctx
->refcount
== 0)
165 bt_context_destroy(ctx
);
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