Fix: complete error handling of babeltrace API
[babeltrace.git] / lib / trace-handle.c
1 /*
2 * trace_handle.c
3 *
4 * Babeltrace Library
5 *
6 * Copyright 2012 EfficiOS Inc. and Linux Foundation
7 *
8 * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
9 * Julien Desfossez <julien.desfossez@efficios.com>
10 *
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:
17 *
18 * The above copyright notice and this permission notice shall be included in
19 * all copies or substantial portions of the Software.
20 */
21
22 #include <stdint.h>
23 #include <stdlib.h>
24 #include <babeltrace/babeltrace.h>
25 #include <babeltrace/context.h>
26 #include <babeltrace/context-internal.h>
27 #include <babeltrace/trace-handle.h>
28 #include <babeltrace/trace-handle-internal.h>
29
30 struct bt_trace_handle *bt_trace_handle_create(struct bt_context *ctx)
31 {
32 struct bt_trace_handle *th;
33
34 if (!ctx)
35 return NULL;
36
37 th = g_new0(struct bt_trace_handle, 1);
38 th->id = ctx->last_trace_handle_id++;
39 return th;
40 }
41
42 void bt_trace_handle_destroy(struct bt_trace_handle *th)
43 {
44 g_free(th);
45 }
46
47 int bt_trace_handle_get_id(struct bt_trace_handle *th)
48 {
49 if (!th)
50 return -1;
51
52 return th->id;
53 }
54
55 const char *bt_trace_handle_get_path(struct bt_context *ctx, int handle_id)
56 {
57 struct bt_trace_handle *handle;
58
59 if (!ctx)
60 return NULL;
61
62 handle = g_hash_table_lookup(ctx->trace_handles,
63 (gpointer) (unsigned long) handle_id);
64 if (!handle)
65 return NULL;
66 return handle->path;
67 }
68
69 uint64_t bt_trace_handle_get_timestamp_begin(struct bt_context *ctx,
70 int handle_id, enum bt_clock_type type)
71 {
72 struct bt_trace_handle *handle;
73 uint64_t ret;
74
75 if (!ctx)
76 return -1ULL;
77
78 handle = g_hash_table_lookup(ctx->trace_handles,
79 (gpointer) (unsigned long) handle_id);
80 if (!handle) {
81 ret = -1ULL;
82 goto end;
83 }
84 if (type == BT_CLOCK_REAL) {
85 ret = handle->real_timestamp_begin;
86 } else if (type == BT_CLOCK_CYCLES) {
87 ret = handle->cycles_timestamp_begin;
88 } else {
89 ret = -1ULL;
90 }
91
92 end:
93 return ret;
94 }
95
96 uint64_t bt_trace_handle_get_timestamp_end(struct bt_context *ctx,
97 int handle_id, enum bt_clock_type type)
98 {
99 struct bt_trace_handle *handle;
100 uint64_t ret;
101
102 if (!ctx)
103 return -1ULL;
104
105 handle = g_hash_table_lookup(ctx->trace_handles,
106 (gpointer) (unsigned long) handle_id);
107 if (!handle) {
108 ret = -1ULL;
109 goto end;
110 }
111 if (type == BT_CLOCK_REAL) {
112 ret = handle->real_timestamp_end;
113 } else if (type == BT_CLOCK_CYCLES) {
114 ret = handle->cycles_timestamp_end;
115 } else {
116 ret = -1ULL;
117 }
118
119 end:
120 return ret;
121 }
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