2 * Copyright 2017-2018 Philippe Proulx <pproulx@efficios.com>
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to deal
6 * in the Software without restriction, including without limitation the rights
7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 * copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
23 #define BT_LOG_TAG "LIB/CLOCK-SNAPSHOT"
24 #include "lib/logging.h"
26 #include "lib/assert-pre.h"
27 #include "common/uuid.h"
28 #include "clock-class.h"
29 #include "clock-snapshot.h"
30 #include <babeltrace2/trace-ir/clock-snapshot-const.h>
31 #include "compat/compiler.h"
32 #include <babeltrace2/types.h>
33 #include "compat/string.h"
35 #include "lib/object.h"
36 #include "common/assert.h"
37 #include "lib/func-status.h"
40 void bt_clock_snapshot_destroy(struct bt_clock_snapshot
*clock_snapshot
)
42 BT_ASSERT(clock_snapshot
);
43 BT_LIB_LOGD("Destroying clock snapshot: %!+k", clock_snapshot
);
44 BT_OBJECT_PUT_REF_AND_RESET(clock_snapshot
->clock_class
);
45 g_free(clock_snapshot
);
49 struct bt_clock_snapshot
*bt_clock_snapshot_new(
50 struct bt_clock_class
*clock_class
)
52 struct bt_clock_snapshot
*ret
= NULL
;
54 BT_ASSERT(clock_class
);
55 BT_LIB_LOGD("Creating clock snapshot object: %![cc-]+K=",
57 ret
= g_new0(struct bt_clock_snapshot
, 1);
59 BT_LIB_LOGE_APPEND_CAUSE(
60 "Failed to allocate one clock snapshot.");
64 bt_object_init_unique(&ret
->base
);
65 ret
->clock_class
= clock_class
;
66 bt_object_get_no_null_check(clock_class
);
67 bt_clock_class_freeze(clock_class
);
68 BT_LIB_LOGD("Created clock snapshot object: %!+k", ret
);
75 struct bt_clock_snapshot
*bt_clock_snapshot_create(
76 struct bt_clock_class
*clock_class
)
78 struct bt_clock_snapshot
*clock_snapshot
= NULL
;
80 BT_ASSERT(clock_class
);
81 clock_snapshot
= bt_object_pool_create_object(&clock_class
->cs_pool
);
82 if (!clock_snapshot
) {
83 BT_LIB_LOGE_APPEND_CAUSE(
84 "Cannot allocate one clock snapshot from clock class's clock snapshot pool: "
85 "%![cc-]+K", clock_class
);
89 if (G_LIKELY(!clock_snapshot
->clock_class
)) {
90 clock_snapshot
->clock_class
= clock_class
;
91 bt_object_get_no_null_check(clock_class
);
98 bt_clock_snapshot_recycle(clock_snapshot
);
99 clock_snapshot
= NULL
;
103 return clock_snapshot
;
107 void bt_clock_snapshot_recycle(struct bt_clock_snapshot
*clock_snapshot
)
109 struct bt_clock_class
*clock_class
;
111 BT_ASSERT(clock_snapshot
);
112 BT_LIB_LOGD("Recycling clock snapshot: %!+k", clock_snapshot
);
115 * Those are the important ordered steps:
117 * 1. Reset the clock snapshot object, but do NOT put its clock
118 * class's reference. This clock class contains the pool to
119 * which we're about to recycle this clock snapshot object,
120 * so we must guarantee its existence thanks to this existing
123 * 2. Move the clock class reference to our `clock_class`
124 * variable so that we can set the clock snapshot's clock
125 * class member to NULL before recycling it. We CANNOT do
126 * this after we put the clock class reference because this
127 * bt_object_put_ref() could destroy the clock class, also
128 * destroying its clock snapshot pool, thus also destroying
129 * our clock snapshot object (this would result in an invalid
132 * 3. Recycle the clock snapshot object.
134 * 4. Put our clock class reference.
136 bt_clock_snapshot_reset(clock_snapshot
);
137 clock_class
= clock_snapshot
->clock_class
;
138 BT_ASSERT(clock_class
);
139 clock_snapshot
->clock_class
= NULL
;
140 bt_object_pool_recycle_object(&clock_class
->cs_pool
, clock_snapshot
);
141 bt_object_put_ref(clock_class
);
144 uint64_t bt_clock_snapshot_get_value(
145 const struct bt_clock_snapshot
*clock_snapshot
)
147 BT_ASSERT_PRE_DEV_NON_NULL(clock_snapshot
, "Clock snapshot");
148 BT_ASSERT_PRE_DEV(clock_snapshot
->is_set
,
149 "Clock snapshot is not set: %!+k", clock_snapshot
);
150 return clock_snapshot
->value_cycles
;
153 enum bt_clock_snapshot_get_ns_from_origin_status
154 bt_clock_snapshot_get_ns_from_origin(
155 const struct bt_clock_snapshot
*clock_snapshot
,
156 int64_t *ret_value_ns
)
158 int ret
= BT_FUNC_STATUS_OK
;
160 BT_ASSERT_PRE_DEV_NON_NULL(clock_snapshot
, "Clock snapshot");
161 BT_ASSERT_PRE_DEV_NON_NULL(ret_value_ns
, "Value (ns) (output)");
162 BT_ASSERT_PRE_DEV(clock_snapshot
->is_set
,
163 "Clock snapshot is not set: %!+k", clock_snapshot
);
165 if (clock_snapshot
->ns_from_origin_overflows
) {
166 BT_LIB_LOGD("Clock snapshot, once converted to nanoseconds from origin, "
167 "overflows the signed 64-bit integer range: "
168 "%![cs-]+k", clock_snapshot
);
169 ret
= BT_FUNC_STATUS_OVERFLOW
;
173 *ret_value_ns
= clock_snapshot
->ns_from_origin
;
179 const struct bt_clock_class
*bt_clock_snapshot_borrow_clock_class_const(
180 const struct bt_clock_snapshot
*clock_snapshot
)
182 BT_ASSERT_PRE_DEV_NON_NULL(clock_snapshot
, "Clock snapshot");
183 return clock_snapshot
->clock_class
;