logging: print human-readable thread names when logging
[lttng-tools.git] / src / common / testpoint / testpoint.h
CommitLineData
6242251b 1/*
ab5be9fa 2 * Copyright (C) 2012 Christian Babeux <christian.babeux@efficios.com>
6242251b 3 *
ab5be9fa 4 * SPDX-License-Identifier: GPL-2.0-only
6242251b 5 *
6242251b
CB
6 */
7
8#ifdef NTESTPOINT
9
10#define testpoint(name)
11#define TESTPOINT_DECL(name)
12
13#else /* NTESTPOINT */
14
15#include <urcu.h> /* for caa_likely/unlikely */
16
17extern int lttng_testpoint_activated;
18
19void *lttng_testpoint_lookup(const char *name);
20
21/*
22 * Testpoint is only active if the global lttng_testpoint_activated flag is
23 * set.
6993eeb3 24 * Return a non-zero error code to indicate failure.
6242251b 25 */
6993eeb3
CB
26#define testpoint(name) \
27 ((caa_unlikely(lttng_testpoint_activated)) \
28 ? __testpoint_##name##_wrapper() : 0)
6242251b
CB
29
30/*
31 * One wrapper per testpoint is generated. This is to keep track of the symbol
32 * lookup status and the corresponding function pointer, if any.
33 */
34#define _TESTPOINT_DECL(_name) \
6993eeb3 35 static inline int __testpoint_##_name##_wrapper(void) \
6242251b 36 { \
6993eeb3
CB
37 int ret = 0; \
38 static int (*tp)(void); \
6242251b
CB
39 static int found; \
40 const char *tp_name = "__testpoint_" #_name; \
41 \
42 if (tp) { \
6993eeb3 43 ret = tp(); \
6242251b
CB
44 } else { \
45 if (!found) { \
46 tp = lttng_testpoint_lookup(tp_name); \
47 if (tp) { \
48 found = 1; \
6993eeb3 49 ret = tp(); \
6242251b
CB
50 } else { \
51 found = -1; \
52 } \
53 } \
54 } \
6993eeb3 55 return ret; \
6242251b
CB
56 }
57
58/* Testpoint declaration */
59#define TESTPOINT_DECL(name) \
60 _TESTPOINT_DECL(name)
61
62#endif /* NTESTPOINT */
This page took 0.051626 seconds and 4 git commands to generate.