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https://gitlab.freedesktop.org/pipewire/pipewire.git
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ca0e886159
Calling the spa_log_xxx macros with NULL log used to be allowed, and it's used in some tests. Write the NULL check in a way the compiler can understand and make UBSan a happy UBSan.
304 lines
8.5 KiB
C
304 lines
8.5 KiB
C
/* Simple Plugin API */
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/* SPDX-FileCopyrightText: Copyright © 2018 Wim Taymans */
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/* SPDX-License-Identifier: MIT */
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#ifndef SPA_LOG_H
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#define SPA_LOG_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdarg.h>
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#include <spa/utils/type.h>
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#include <spa/utils/defs.h>
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#include <spa/utils/hook.h>
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/** \defgroup spa_log Log
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* Logging interface
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*/
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/**
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* \addtogroup spa_log
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* \{
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*/
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/** The default log topic. Redefine this in your code to
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* allow for the spa_log_* macros to work correctly, e.g:
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*
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* \code{.c}
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* struct spa_log_topic *mylogger;
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* #undef SPA_LOG_TOPIC_DEFAULT
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* #define SPA_LOG_TOPIC_DEFAULT mylogger
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* \endcode
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*/
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#define SPA_LOG_TOPIC_DEFAULT NULL
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enum spa_log_level {
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SPA_LOG_LEVEL_NONE = 0,
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SPA_LOG_LEVEL_ERROR,
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SPA_LOG_LEVEL_WARN,
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SPA_LOG_LEVEL_INFO,
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SPA_LOG_LEVEL_DEBUG,
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SPA_LOG_LEVEL_TRACE,
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};
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/**
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* The Log interface
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*/
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#define SPA_TYPE_INTERFACE_Log SPA_TYPE_INFO_INTERFACE_BASE "Log"
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struct spa_log {
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/** the version of this log. This can be used to expand this
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* structure in the future */
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#define SPA_VERSION_LOG 0
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struct spa_interface iface;
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/**
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* Logging level, everything above this level is not logged
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*/
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enum spa_log_level level;
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};
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/**
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* \struct spa_log_topic
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*
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* Identifier for a topic. Topics are string-based filters that logically
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* group messages together. An implementation may decide to filter different
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* topics on different levels, for example the "protocol" topic may require
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* debug level TRACE while the "core" topic defaults to debug level INFO.
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*
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* spa_log_topics require a spa_log_methods version of 1 or higher.
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*/
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struct spa_log_topic {
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#define SPA_VERSION_LOG_TOPIC 0
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/** the version of this topic. This can be used to expand this
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* structure in the future */
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uint32_t version;
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/** The string identifier for the topic */
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const char *topic;
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/** Logging level set for this topic */
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enum spa_log_level level;
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/** False if this topic follows the \ref spa_log level */
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bool has_custom_level;
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};
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struct spa_log_methods {
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#define SPA_VERSION_LOG_METHODS 1
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uint32_t version;
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/**
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* Log a message with the given log level.
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*
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* \note If compiled with this header, this function is only called
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* for implementations of version 0. For versions 1 and above, see
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* logt() instead.
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*
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* \param log a spa_log
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* \param level a spa_log_level
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* \param file the file name
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* \param line the line number
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* \param func the function name
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* \param fmt printf style format
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* \param ... format arguments
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*/
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void (*log) (void *object,
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enum spa_log_level level,
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const char *file,
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int line,
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const char *func,
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const char *fmt, ...) SPA_PRINTF_FUNC(6, 7);
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/**
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* Log a message with the given log level.
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*
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* \note If compiled with this header, this function is only called
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* for implementations of version 0. For versions 1 and above, see
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* logtv() instead.
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*
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* \param log a spa_log
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* \param level a spa_log_level
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* \param file the file name
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* \param line the line number
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* \param func the function name
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* \param fmt printf style format
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* \param args format arguments
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*/
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void (*logv) (void *object,
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enum spa_log_level level,
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const char *file,
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int line,
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const char *func,
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const char *fmt,
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va_list args) SPA_PRINTF_FUNC(6, 0);
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/**
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* Log a message with the given log level for the given topic.
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*
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* \note Callers that do not use topic-based logging (version 0), the \a
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* topic is NULL
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*
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* \param log a spa_log
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* \param level a spa_log_level
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* \param topic the topic for this message, may be NULL
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* \param file the file name
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* \param line the line number
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* \param func the function name
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* \param fmt printf style format
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* \param ... format arguments
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*
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* \since 1
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*/
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void (*logt) (void *object,
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enum spa_log_level level,
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const struct spa_log_topic *topic,
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const char *file,
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int line,
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const char *func,
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const char *fmt, ...) SPA_PRINTF_FUNC(7, 8);
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/**
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* Log a message with the given log level for the given topic.
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*
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* \note For callers that do not use topic-based logging (version 0),
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* the \a topic is NULL
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*
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* \param log a spa_log
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* \param level a spa_log_level
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* \param topic the topic for this message, may be NULL
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* \param file the file name
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* \param line the line number
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* \param func the function name
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* \param fmt printf style format
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* \param args format arguments
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*
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* \since 1
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*/
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void (*logtv) (void *object,
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enum spa_log_level level,
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const struct spa_log_topic *topic,
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const char *file,
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int line,
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const char *func,
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const char *fmt,
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va_list args) SPA_PRINTF_FUNC(7, 0);
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/**
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* Initializes a \ref spa_log_topic to the correct logging level.
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*
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* \since 1
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*/
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void (*topic_init) (void *object, struct spa_log_topic *topic);
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};
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#define SPA_LOG_TOPIC(v, t) \
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(struct spa_log_topic){ .version = (v), .topic = (t)}
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static inline void spa_log_topic_init(struct spa_log *log, struct spa_log_topic *topic)
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{
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if (SPA_UNLIKELY(!log))
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return;
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spa_interface_call(&log->iface, struct spa_log_methods, topic_init, 1, topic);
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}
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static inline bool spa_log_level_topic_enabled(const struct spa_log *log,
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const struct spa_log_topic *topic,
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enum spa_log_level level)
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{
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enum spa_log_level max_level;
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if (SPA_UNLIKELY(!log))
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return false;
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if (topic && topic->has_custom_level)
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max_level = topic->level;
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else
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max_level = log->level;
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return level <= max_level;
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}
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/* Transparently calls to version 0 log if v1 is not supported */
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#define spa_log_logt(l,lev,topic,...) \
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({ \
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struct spa_log *_l = l; \
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if (SPA_UNLIKELY(spa_log_level_topic_enabled(_l, topic, lev))) { \
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struct spa_interface *_if = &_l->iface; \
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if (!spa_interface_call(_if, \
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struct spa_log_methods, logt, 1, \
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lev, topic, \
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__VA_ARGS__)) \
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spa_interface_call(_if, \
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struct spa_log_methods, log, 0, \
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lev, __VA_ARGS__); \
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} \
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})
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/* Transparently calls to version 0 logv if v1 is not supported */
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#define spa_log_logtv(l,lev,topic,...) \
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({ \
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struct spa_log *_l = l; \
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if (SPA_UNLIKELY(spa_log_level_topic_enabled(_l, topic, lev))) { \
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struct spa_interface *_if = &_l->iface; \
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if (!spa_interface_call(_if, \
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struct spa_log_methods, logtv, 1, \
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lev, topic, \
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__VA_ARGS__)) \
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spa_interface_call(_if, \
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struct spa_log_methods, logv, 0, \
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lev, __VA_ARGS__); \
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} \
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})
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#define spa_logt_lev(l,lev,t,...) \
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spa_log_logt(l,lev,t,__FILE__,__LINE__,__func__,__VA_ARGS__)
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#define spa_log_lev(l,lev,...) \
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spa_logt_lev(l,lev,SPA_LOG_TOPIC_DEFAULT,__VA_ARGS__)
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#define spa_log_log(l,lev,...) \
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spa_log_logt(l,lev,SPA_LOG_TOPIC_DEFAULT,__VA_ARGS__)
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#define spa_log_logv(l,lev,...) \
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spa_log_logtv(l,lev,SPA_LOG_TOPIC_DEFAULT,__VA_ARGS__)
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#define spa_log_error(l,...) spa_log_lev(l,SPA_LOG_LEVEL_ERROR,__VA_ARGS__)
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#define spa_log_warn(l,...) spa_log_lev(l,SPA_LOG_LEVEL_WARN,__VA_ARGS__)
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#define spa_log_info(l,...) spa_log_lev(l,SPA_LOG_LEVEL_INFO,__VA_ARGS__)
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#define spa_log_debug(l,...) spa_log_lev(l,SPA_LOG_LEVEL_DEBUG,__VA_ARGS__)
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#define spa_log_trace(l,...) spa_log_lev(l,SPA_LOG_LEVEL_TRACE,__VA_ARGS__)
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#define spa_logt_error(l,t,...) spa_logt_lev(l,SPA_LOG_LEVEL_ERROR,t,__VA_ARGS__)
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#define spa_logt_warn(l,t,...) spa_logt_lev(l,SPA_LOG_LEVEL_WARN,t,__VA_ARGS__)
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#define spa_logt_info(l,t,...) spa_logt_lev(l,SPA_LOG_LEVEL_INFO,t,__VA_ARGS__)
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#define spa_logt_debug(l,t,...) spa_logt_lev(l,SPA_LOG_LEVEL_DEBUG,t,__VA_ARGS__)
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#define spa_logt_trace(l,t,...) spa_logt_lev(l,SPA_LOG_LEVEL_TRACE,t,__VA_ARGS__)
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#ifndef FASTPATH
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#define spa_log_trace_fp(l,...) spa_log_lev(l,SPA_LOG_LEVEL_TRACE,__VA_ARGS__)
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#else
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#define spa_log_trace_fp(l,...)
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#endif
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/** \fn spa_log_error */
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/** keys can be given when initializing the logger handle */
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#define SPA_KEY_LOG_LEVEL "log.level" /**< the default log level */
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#define SPA_KEY_LOG_COLORS "log.colors" /**< enable colors in the logger, set to "force" to enable
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* colors even when not logging to a terminal */
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#define SPA_KEY_LOG_FILE "log.file" /**< log to the specified file instead of
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* stderr. */
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#define SPA_KEY_LOG_TIMESTAMP "log.timestamp" /**< log timestamps */
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#define SPA_KEY_LOG_LINE "log.line" /**< log file and line numbers */
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#define SPA_KEY_LOG_PATTERNS "log.patterns" /**< Spa:String:JSON array of [ {"pattern" : level}, ... ] */
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/**
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* \}
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*/
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* SPA_LOG_H */
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