param-parse: remove unnecessary variable assignment
[babeltrace.git] / src / lib / current-thread.c
CommitLineData
553c4bab 1/*
0235b0db 2 * SPDX-License-Identifier: MIT
553c4bab 3 *
0235b0db 4 * Copyright (c) 2019 Philippe Proulx <pproulx@efficios.com>
553c4bab
PP
5 */
6
7#define BT_LOG_TAG "LIB/CUR-THREAD"
8#include "lib/logging.h"
9
4fa90f32 10#include <babeltrace2/babeltrace.h>
553c4bab
PP
11#include <stdint.h>
12#include <stdarg.h>
13
14#include "error.h"
15#include "common/assert.h"
d98421f2 16#include "lib/assert-cond.h"
553c4bab
PP
17#include "lib/func-status.h"
18
1778c2a4
PP
19#define BT_ASSERT_PRE_FILE_NAME_NON_NULL(_file_name) \
20 BT_ASSERT_PRE_NON_NULL("file-name", (_file_name), "File name");
21
22#define BT_ASSERT_PRE_MSG_FMT_NON_NULL(_msg_fmt) \
23 BT_ASSERT_PRE_NON_NULL("message-format", (_msg_fmt), "Message format");
24
553c4bab
PP
25/*
26 * This points to the thread's error object, or it's `NULL` if there's
27 * no current error object.
28 */
29static __thread struct bt_error *thread_error;
30
31const struct bt_error *bt_current_thread_take_error(void)
32{
33 struct bt_error *error = thread_error;
34
35 thread_error = NULL;
36 BT_LOGD("Took current thread's error object: addr=%p",
37 error);
38 return error;
39}
40
41void bt_current_thread_clear_error(void)
42{
43 bt_error_destroy(thread_error);
44 BT_LOGD("Cleared current thread's error object: addr=%p",
45 thread_error);
46 thread_error = NULL;
47}
48
49void bt_current_thread_move_error(const struct bt_error *error)
50{
d5b13b9b 51 BT_ASSERT_PRE_ERROR_NON_NULL(error);
553c4bab
PP
52 bt_current_thread_clear_error();
53 thread_error = (void *) error;
54 BT_LOGD("Moved error object as current thread's error: addr=%p",
55 thread_error);
56}
57
58/*
59 * Creates the current thread's error object if it does not already
60 * exist.
61 */
62static
63int try_create_thread_error(void)
64{
65 int status = BT_FUNC_STATUS_OK;
66
67 if (thread_error) {
68 goto end;
69 }
70
71 BT_LOGD_STR("Creating current thread's error object.");
72 thread_error = bt_error_create();
73 if (!thread_error) {
74 /* bt_error_create() logs errors */
75 status = BT_FUNC_STATUS_MEMORY_ERROR;
76 goto end;
77 }
78
79 BT_LOGD("Created current thread's error object: addr=%p", thread_error);
80
81end:
82 return status;
83}
84
85enum bt_current_thread_error_append_cause_status
86bt_current_thread_error_append_cause_from_unknown(
87 const char *module_name, const char *file_name,
88 uint64_t line_no, const char *msg_fmt, ...)
89{
90 enum bt_current_thread_error_append_cause_status status =
91 try_create_thread_error();
92 va_list args;
93
1778c2a4
PP
94 BT_ASSERT_PRE_NON_NULL("module-name", module_name, "Module name");
95 BT_ASSERT_PRE_FILE_NAME_NON_NULL(file_name);
96 BT_ASSERT_PRE_MSG_FMT_NON_NULL(msg_fmt);
c77d03eb 97
553c4bab
PP
98 if (status) {
99 goto end;
100 }
101
102 BT_LOGD("Appending error cause to current thread's error from unknown actor: "
103 "error-addr=%p", thread_error);
104 va_start(args, msg_fmt);
105 status = bt_error_append_cause_from_unknown(thread_error, module_name,
106 file_name, line_no, msg_fmt, args);
107 va_end(args);
108
109end:
110 return status;
111}
112
113enum bt_current_thread_error_append_cause_status
114bt_current_thread_error_append_cause_from_component(
115 bt_self_component *self_comp, const char *file_name,
116 uint64_t line_no, const char *msg_fmt, ...)
117{
118 enum bt_current_thread_error_append_cause_status status =
119 try_create_thread_error();
120 va_list args;
121
d5b13b9b 122 BT_ASSERT_PRE_COMP_NON_NULL(self_comp);
1778c2a4
PP
123 BT_ASSERT_PRE_FILE_NAME_NON_NULL(file_name);
124 BT_ASSERT_PRE_MSG_FMT_NON_NULL(msg_fmt);
c77d03eb 125
553c4bab
PP
126 if (status) {
127 goto end;
128 }
129
130 BT_LOGD("Appending error cause to current thread's error from component: "
131 "error-addr=%p", thread_error);
132 va_start(args, msg_fmt);
133 status = bt_error_append_cause_from_component(thread_error, self_comp,
134 file_name, line_no, msg_fmt, args);
135 va_end(args);
136
137end:
138 return status;
139}
140
141enum bt_current_thread_error_append_cause_status
142bt_current_thread_error_append_cause_from_component_class(
143 bt_self_component_class *self_comp_class, const char *file_name,
144 uint64_t line_no, const char *msg_fmt, ...)
145{
146 enum bt_current_thread_error_append_cause_status status =
147 try_create_thread_error();
148 va_list args;
149
d5b13b9b 150 BT_ASSERT_PRE_COMP_CLS_NON_NULL(self_comp_class);
1778c2a4
PP
151 BT_ASSERT_PRE_FILE_NAME_NON_NULL(file_name);
152 BT_ASSERT_PRE_MSG_FMT_NON_NULL(msg_fmt);
c77d03eb 153
553c4bab
PP
154 if (status) {
155 goto end;
156 }
157
158 BT_LOGD("Appending error cause to current thread's error from component class actor: "
159 "error-addr=%p", thread_error);
160 va_start(args, msg_fmt);
161 status = bt_error_append_cause_from_component_class(thread_error,
162 self_comp_class, file_name, line_no, msg_fmt, args);
163 va_end(args);
164
165end:
166 return status;
167}
168
169enum bt_current_thread_error_append_cause_status
170bt_current_thread_error_append_cause_from_message_iterator(
171 bt_self_message_iterator *self_iter, const char *file_name,
172 uint64_t line_no, const char *msg_fmt, ...)
173{
174 enum bt_current_thread_error_append_cause_status status =
175 try_create_thread_error();
176 va_list args;
177
d5b13b9b 178 BT_ASSERT_PRE_MSG_ITER_NON_NULL(self_iter);
1778c2a4
PP
179 BT_ASSERT_PRE_FILE_NAME_NON_NULL(file_name);
180 BT_ASSERT_PRE_MSG_FMT_NON_NULL(msg_fmt);
c77d03eb 181
553c4bab
PP
182 if (status) {
183 goto end;
184 }
185
186 BT_LOGD("Appending error cause to current thread's error from message iterator actor: "
187 "error-addr=%p", thread_error);
188 va_start(args, msg_fmt);
189 status = bt_error_append_cause_from_message_iterator(thread_error,
190 self_iter, file_name, line_no, msg_fmt, args);
191 va_end(args);
192
193end:
194 return status;
195}
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