lib: make public reference count functions have strict types
[babeltrace.git] / lib / trace-ir / clock-class.c
1 /*
2 * Copyright 2017-2018 Philippe Proulx <pproulx@efficios.com>
3 * Copyright 2013, 2014 Jérémie Galarneau <jeremie.galarneau@efficios.com>
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a copy
6 * of this software and associated documentation files (the "Software"), to deal
7 * in the Software without restriction, including without limitation the rights
8 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9 * copies of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 * SOFTWARE.
22 */
23
24 #define BT_LOG_TAG "CLOCK-CLASS"
25 #include <babeltrace/lib-logging-internal.h>
26
27 #include <babeltrace/assert-pre-internal.h>
28 #include <babeltrace/compat/uuid-internal.h>
29 #include <babeltrace/trace-ir/clock-class-internal.h>
30 #include <babeltrace/trace-ir/clock-value-internal.h>
31 #include <babeltrace/trace-ir/utils-internal.h>
32 #include <babeltrace/compiler-internal.h>
33 #include <babeltrace/types.h>
34 #include <babeltrace/compat/string-internal.h>
35 #include <inttypes.h>
36 #include <babeltrace/object-internal.h>
37 #include <babeltrace/assert-internal.h>
38
39 #define BT_ASSERT_PRE_CLOCK_CLASS_HOT(_cc) \
40 BT_ASSERT_PRE_HOT((_cc), "Clock class", ": %!+K", (_cc))
41
42 static
43 void destroy_clock_class(struct bt_object *obj)
44 {
45 struct bt_clock_class *clock_class = (void *) obj;
46
47 BT_LIB_LOGD("Destroying clock class: %!+K", clock_class);
48
49 if (clock_class->name.str) {
50 g_string_free(clock_class->name.str, TRUE);
51 clock_class->name.str = NULL;
52 clock_class->name.value = NULL;
53 }
54
55 if (clock_class->description.str) {
56 g_string_free(clock_class->description.str, TRUE);
57 clock_class->description.str = NULL;
58 clock_class->description.value = NULL;
59 }
60
61 bt_object_pool_finalize(&clock_class->cv_pool);
62 g_free(clock_class);
63 }
64
65 static
66 void free_clock_value(struct bt_clock_value *clock_value,
67 struct bt_clock_class *clock_class)
68 {
69 bt_clock_value_destroy(clock_value);
70 }
71
72 static inline
73 void set_base_offset(struct bt_clock_class *clock_class)
74 {
75 uint64_t offset_cycles_ns;
76
77 /* Initialize nanosecond timestamp to clock's offset in seconds */
78 if (clock_class->offset_seconds <= (INT64_MIN / INT64_C(1000000000) - 1) ||
79 clock_class->offset_seconds >= (INT64_MAX / INT64_C(1000000000)) - 1) {
80 /*
81 * Overflow: offset in seconds converted to nanoseconds
82 * is outside the int64_t range. We also subtract 1 here
83 * to leave "space" for the offset in cycles converted
84 * to nanoseconds (which is always less than 1 second by
85 * contract).
86 */
87 clock_class->base_offset.overflows = true;
88 goto end;
89 }
90
91 /* Offset (seconds) to nanoseconds */
92 clock_class->base_offset.value_ns = clock_class->offset_seconds *
93 INT64_C(1000000000);
94
95 /* Add offset in cycles */
96 BT_ASSERT(clock_class->offset_cycles < clock_class->frequency);
97 offset_cycles_ns = bt_util_ns_from_value(clock_class->frequency,
98 clock_class->offset_cycles);
99 BT_ASSERT(offset_cycles_ns < 1000000000);
100 clock_class->base_offset.value_ns += (int64_t) offset_cycles_ns;
101 clock_class->base_offset.overflows = false;
102
103 end:
104 return;
105 }
106
107 struct bt_clock_class *bt_clock_class_create(void)
108 {
109 int ret;
110 struct bt_clock_class *clock_class = NULL;
111
112 BT_LOGD_STR("Creating default clock class object");
113
114 clock_class = g_new0(struct bt_clock_class, 1);
115 if (!clock_class) {
116 BT_LOGE_STR("Failed to allocate one clock class.");
117 goto error;
118 }
119
120 bt_object_init_shared(&clock_class->base, destroy_clock_class);
121 clock_class->name.str = g_string_new(NULL);
122 if (!clock_class->name.str) {
123 BT_LOGE_STR("Failed to allocate a GString.");
124 goto error;
125 }
126
127 clock_class->description.str = g_string_new(NULL);
128 if (!clock_class->description.str) {
129 BT_LOGE_STR("Failed to allocate a GString.");
130 goto error;
131 }
132
133 clock_class->frequency = UINT64_C(1000000000);
134 clock_class->is_absolute = BT_TRUE;
135 set_base_offset(clock_class);
136 ret = bt_object_pool_initialize(&clock_class->cv_pool,
137 (bt_object_pool_new_object_func) bt_clock_value_new,
138 (bt_object_pool_destroy_object_func)
139 free_clock_value,
140 clock_class);
141 if (ret) {
142 BT_LOGE("Failed to initialize clock value pool: ret=%d",
143 ret);
144 goto error;
145 }
146
147 BT_LIB_LOGD("Created clock class object: %!+K", clock_class);
148 goto end;
149
150 error:
151 BT_OBJECT_PUT_REF_AND_RESET(clock_class);
152
153 end:
154 return clock_class;
155 }
156
157 const char *bt_clock_class_get_name(const struct bt_clock_class *clock_class)
158 {
159 BT_ASSERT_PRE_NON_NULL(clock_class, "Clock class");
160 return clock_class->name.value;
161 }
162
163 int bt_clock_class_set_name(struct bt_clock_class *clock_class,
164 const char *name)
165 {
166 BT_ASSERT_PRE_NON_NULL(clock_class, "Clock class");
167 BT_ASSERT_PRE_NON_NULL(name, "Name");
168 BT_ASSERT_PRE_CLOCK_CLASS_HOT(clock_class);
169 g_string_assign(clock_class->name.str, name);
170 clock_class->name.value = clock_class->name.str->str;
171 BT_LIB_LOGV("Set clock class's name: %!+K", clock_class);
172 return 0;
173 }
174
175 const char *bt_clock_class_get_description(
176 const struct bt_clock_class *clock_class)
177 {
178 BT_ASSERT_PRE_NON_NULL(clock_class, "Clock class");
179 return clock_class->description.value;
180 }
181
182 int bt_clock_class_set_description(struct bt_clock_class *clock_class,
183 const char *descr)
184 {
185 BT_ASSERT_PRE_NON_NULL(clock_class, "Clock class");
186 BT_ASSERT_PRE_NON_NULL(descr, "Description");
187 BT_ASSERT_PRE_CLOCK_CLASS_HOT(clock_class);
188 g_string_assign(clock_class->description.str, descr);
189 clock_class->description.value = clock_class->description.str->str;
190 BT_LIB_LOGV("Set clock class's description: %!+K",
191 clock_class);
192 return 0;
193 }
194
195 uint64_t bt_clock_class_get_frequency(const struct bt_clock_class *clock_class)
196 {
197 BT_ASSERT_PRE_NON_NULL(clock_class, "Clock class");
198 return clock_class->frequency;
199 }
200
201 void bt_clock_class_set_frequency(struct bt_clock_class *clock_class,
202 uint64_t frequency)
203 {
204 BT_ASSERT_PRE_NON_NULL(clock_class, "Clock class");
205 BT_ASSERT_PRE_CLOCK_CLASS_HOT(clock_class);
206 BT_ASSERT_PRE(frequency != UINT64_C(-1) && frequency != 0,
207 "Invalid frequency: %![cc-]+K, new-freq=%" PRIu64,
208 clock_class, frequency);
209 BT_ASSERT_PRE(clock_class->offset_cycles < frequency,
210 "Offset (cycles) is greater than clock class's frequency: "
211 "%![cc-]+K, new-freq=%" PRIu64, clock_class, frequency);
212 clock_class->frequency = frequency;
213 set_base_offset(clock_class);
214 BT_LIB_LOGV("Set clock class's frequency: %!+K", clock_class);
215 }
216
217 uint64_t bt_clock_class_get_precision(const struct bt_clock_class *clock_class)
218 {
219 BT_ASSERT_PRE_NON_NULL(clock_class, "Clock class");
220 return clock_class->precision;
221 }
222
223 void bt_clock_class_set_precision(struct bt_clock_class *clock_class,
224 uint64_t precision)
225 {
226 BT_ASSERT_PRE_NON_NULL(clock_class, "Clock class");
227 BT_ASSERT_PRE_CLOCK_CLASS_HOT(clock_class);
228 BT_ASSERT_PRE(precision != UINT64_C(-1),
229 "Invalid precision: %![cc-]+K, new-precision=%" PRIu64,
230 clock_class, precision);
231 clock_class->precision = precision;
232 BT_LIB_LOGV("Set clock class's precision: %!+K", clock_class);
233 }
234
235 void bt_clock_class_get_offset(const struct bt_clock_class *clock_class,
236 int64_t *seconds, uint64_t *cycles)
237 {
238 BT_ASSERT_PRE_NON_NULL(clock_class, "Clock class");
239 BT_ASSERT_PRE_NON_NULL(seconds, "Seconds (output)");
240 BT_ASSERT_PRE_NON_NULL(cycles, "Cycles (output)");
241 *seconds = clock_class->offset_seconds;
242 *cycles = clock_class->offset_cycles;
243 }
244
245 void bt_clock_class_set_offset(struct bt_clock_class *clock_class,
246 int64_t seconds, uint64_t cycles)
247 {
248 BT_ASSERT_PRE_NON_NULL(clock_class, "Clock class");
249 BT_ASSERT_PRE_CLOCK_CLASS_HOT(clock_class);
250 BT_ASSERT_PRE(cycles < clock_class->frequency,
251 "Offset (cycles) is greater than clock class's frequency: "
252 "%![cc-]+K, new-offset-cycles=%" PRIu64, clock_class, cycles);
253 clock_class->offset_seconds = seconds;
254 clock_class->offset_cycles = cycles;
255 set_base_offset(clock_class);
256 BT_LIB_LOGV("Set clock class's offset: %!+K", clock_class);
257 }
258
259 bt_bool bt_clock_class_is_absolute(const struct bt_clock_class *clock_class)
260 {
261 BT_ASSERT_PRE_NON_NULL(clock_class, "Clock class");
262 return (bool) clock_class->is_absolute;
263 }
264
265 void bt_clock_class_set_is_absolute(struct bt_clock_class *clock_class,
266 bt_bool is_absolute)
267 {
268 BT_ASSERT_PRE_NON_NULL(clock_class, "Clock class");
269 BT_ASSERT_PRE_CLOCK_CLASS_HOT(clock_class);
270 clock_class->is_absolute = (bool) is_absolute;
271 BT_LIB_LOGV("Set clock class's absolute property: %!+K",
272 clock_class);
273 }
274
275 bt_uuid bt_clock_class_get_uuid(const struct bt_clock_class *clock_class)
276 {
277 BT_ASSERT_PRE_NON_NULL(clock_class, "Clock class");
278 return clock_class->uuid.value;
279 }
280
281 void bt_clock_class_set_uuid(struct bt_clock_class *clock_class,
282 bt_uuid uuid)
283 {
284 BT_ASSERT_PRE_NON_NULL(clock_class, "Clock class");
285 BT_ASSERT_PRE_NON_NULL(uuid, "UUID");
286 BT_ASSERT_PRE_CLOCK_CLASS_HOT(clock_class);
287 memcpy(clock_class->uuid.uuid, uuid, BABELTRACE_UUID_LEN);
288 clock_class->uuid.value = clock_class->uuid.uuid;
289 BT_LIB_LOGV("Set clock class's UUID: %!+K", clock_class);
290 }
291
292 BT_HIDDEN
293 void _bt_clock_class_freeze(const struct bt_clock_class *clock_class)
294 {
295 BT_ASSERT(clock_class);
296
297 if (clock_class->frozen) {
298 return;
299 }
300
301 BT_LIB_LOGD("Freezing clock class: %!+K", clock_class);
302 ((struct bt_clock_class *) clock_class)->frozen = 1;
303 }
304
305 int bt_clock_class_cycles_to_ns_from_origin(
306 const struct bt_clock_class *clock_class,
307 uint64_t cycles, int64_t *ns)
308 {
309 int ret;
310
311 BT_ASSERT_PRE_NON_NULL(clock_class, "Clock class");
312 BT_ASSERT_PRE_NON_NULL(ns, "Nanoseconds (output)");
313 ret = bt_util_ns_from_origin(clock_class, cycles, ns);
314 if (ret) {
315 BT_LIB_LOGW("Cannot convert cycles to nanoseconds "
316 "from origin for given clock class: "
317 "value overflows the signed 64-bit integer range: "
318 "%![cc-]+K, cycles=%" PRIu64,
319 clock_class, cycles);
320 }
321
322 return ret;
323 }
324
325 void bt_clock_class_get_ref(const struct bt_clock_class *clock_class)
326 {
327 bt_object_get_ref(clock_class);
328 }
329
330 void bt_clock_class_put_ref(const struct bt_clock_class *clock_class)
331 {
332 bt_object_put_ref(clock_class);
333 }
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