Fix : protect static float and double declarations
[babeltrace.git] / lib / context.c
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1/*
2 * context.c
3 *
4 * Babeltrace Library
5 *
6 * Copyright 2011-2012 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 <babeltrace/babeltrace.h>
23#include <babeltrace/context.h>
08c22d05 24#include <babeltrace/context-internal.h>
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25#include <babeltrace/trace-handle.h>
26#include <babeltrace/trace-handle-internal.h>
27#include <babeltrace/trace-collection.h>
28#include <babeltrace/format.h>
e1d01c39 29#include <babeltrace/babeltrace-internal.h>
b469d2dd 30#include <stdlib.h>
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31#include <string.h>
32#include <assert.h>
7f89ddce 33#include <errno.h>
b469d2dd 34
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35#include <fcntl.h> /* For O_RDONLY */
36
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37#include <glib.h>
38
39struct bt_context *bt_context_create(void)
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40{
41 struct bt_context *ctx;
42
6cba487f 43 ctx = g_new0(struct bt_context, 1);
b469d2dd 44 ctx->refcount = 1;
6cba487f 45 /* Negative handle id are errors. */
842c2b97 46 ctx->last_trace_handle_id = 0;
b469d2dd 47
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48 /* Instanciate the trace handle container */
49 ctx->trace_handles = g_hash_table_new_full(g_direct_hash,
50 g_direct_equal, NULL,
51 (GDestroyNotify) bt_trace_handle_destroy);
52
e003e871 53 ctx->current_iterator = NULL;
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54 ctx->tc = g_new0(struct trace_collection, 1);
55 init_trace_collection(ctx->tc);
56
b469d2dd 57 return ctx;
6cba487f 58}
b469d2dd 59
6cba487f 60int bt_context_add_trace(struct bt_context *ctx, const char *path,
613f532b 61 const char *format_name,
20d0dcf9 62 void (*packet_seek)(struct stream_pos *pos, size_t index,
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63 int whence),
64 struct mmap_stream_list *stream_list,
65 FILE *metadata)
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66{
67 struct trace_descriptor *td;
68 struct format *fmt;
69 struct bt_trace_handle *handle;
1059a2bf 70 int ret;
6cba487f 71
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72 if (!ctx || !format_name || (!path && !stream_list))
73 return -EINVAL;
74
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75 fmt = bt_lookup_format(g_quark_from_string(format_name));
76 if (!fmt) {
77 fprintf(stderr, "[error] [Context] Format \"%s\" unknown.\n\n",
78 format_name);
79 ret = -1;
80 goto end;
81 }
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82 if (path) {
83 td = fmt->open_trace(path, O_RDONLY, packet_seek, NULL);
84 if (!td) {
ca718275 85 fprintf(stderr, "[warning] [Context] Cannot open_trace of the format %s .\n\n",
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86 path);
87 ret = -1;
88 goto end;
89 }
90 } else {
91 td = fmt->open_mmap_trace(stream_list, packet_seek, metadata);
92 if (!td) {
93 fprintf(stderr, "[error] [Context] Cannot open_trace of the format %s .\n\n",
94 path);
95 ret = -1;
96 goto end;
97 }
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98 }
99
100 /* Create an handle for the trace */
101 handle = bt_trace_handle_create(ctx);
102 if (handle < 0) {
02dc4610 103 fprintf(stderr, "[error] [Context] Creating trace handle %s .\n\n",
6cba487f 104 path);
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105 ret = -1;
106 goto end;
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107 }
108 handle->format = fmt;
109 handle->td = td;
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110 if (path) {
111 strncpy(handle->path, path, PATH_MAX);
112 handle->path[PATH_MAX - 1] = '\0';
113 }
6cba487f 114
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115 if (fmt->set_handle)
116 fmt->set_handle(td, handle);
117 if (fmt->set_context)
118 fmt->set_context(td, ctx);
119
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120 /* Add new handle to container */
121 g_hash_table_insert(ctx->trace_handles,
122 (gpointer) (unsigned long) handle->id,
123 handle);
1059a2bf 124 ret = trace_collection_add(ctx->tc, td);
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125 if (ret != 0)
126 goto end;
127
128 ret = fmt->convert_index_timestamp(td);
129 if (ret < 0)
130 goto end;
131
132 handle->real_timestamp_begin = fmt->timestamp_begin(td, handle, BT_CLOCK_REAL);
133 handle->real_timestamp_end = fmt->timestamp_end(td, handle, BT_CLOCK_REAL);
134 handle->cycles_timestamp_begin = fmt->timestamp_begin(td, handle, BT_CLOCK_CYCLES);
135 handle->cycles_timestamp_end = fmt->timestamp_end(td, handle, BT_CLOCK_CYCLES);
136
137 return handle->id;
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138end:
139 return ret;
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140}
141
7f89ddce 142int bt_context_remove_trace(struct bt_context *ctx, int handle_id)
b469d2dd 143{
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144 struct bt_trace_handle *handle;
145
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146 if (!ctx)
147 return -EINVAL;
148
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149 handle = g_hash_table_lookup(ctx->trace_handles,
150 (gpointer) (unsigned long) handle_id);
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151 if (!handle)
152 return -ENOENT;
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153
154 /* Remove from containers */
155 trace_collection_remove(ctx->tc, handle->td);
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156 /* Close the trace */
157 handle->format->close_trace(handle->td);
158
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159 /* Remove and free the handle */
160 g_hash_table_remove(ctx->trace_handles,
161 (gpointer) (unsigned long) handle_id);
7f89ddce 162 return 0;
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163}
164
165static
166void bt_context_destroy(struct bt_context *ctx)
167{
7f89ddce 168 assert(ctx);
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169 finalize_trace_collection(ctx->tc);
170
171 /* Remote all traces. The g_hash_table_destroy will call
172 * bt_trace_handle_destroy on each elements.
173 */
174 g_hash_table_destroy(ctx->trace_handles);
175
176 /* ctx->tc should always be valid */
177 assert(ctx->tc != NULL);
178 g_free(ctx->tc);
179 g_free(ctx);
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180}
181
6cba487f 182void bt_context_get(struct bt_context *ctx)
b469d2dd 183{
7f89ddce 184 assert(ctx);
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185 ctx->refcount++;
186}
b469d2dd 187
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188void bt_context_put(struct bt_context *ctx)
189{
7f89ddce 190 assert(ctx);
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191 ctx->refcount--;
192 if (ctx->refcount == 0)
6cba487f 193 bt_context_destroy(ctx);
b469d2dd 194}
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