build-13159219/doc/spa/support/log.h

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/* Simple Plugin API
 *
 * Copyright © 2018 Wim Taymans
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */
 
#ifndef SPA_LOG_H
#define SPA_LOG_H
 
#ifdef __cplusplus
extern "C" {
#endif
 
#include <stdarg.h>
 
#include <spa/utils/type.h>
#include <spa/utils/defs.h>
#include <spa/utils/hook.h>
 
enum spa_log_level {
        SPA_LOG_LEVEL_NONE = 0,
        SPA_LOG_LEVEL_ERROR,
        SPA_LOG_LEVEL_WARN,
        SPA_LOG_LEVEL_INFO,
        SPA_LOG_LEVEL_DEBUG,
        SPA_LOG_LEVEL_TRACE,
};
 
#define SPA_TYPE_INTERFACE_Log  SPA_TYPE_INFO_INTERFACE_BASE "Log"
 
 
struct spa_log {
#define SPA_VERSION_LOG         0
        struct spa_interface iface;
        enum spa_log_level level;
};
 
struct spa_log_methods {
#define SPA_VERSION_LOG_METHODS 0
        uint32_t version;
        void (*log) (void *object,
                     enum spa_log_level level,
                     const char *file,
                     int line,
                     const char *func,
                     const char *fmt, ...) SPA_PRINTF_FUNC(6, 7);
 
        void (*logv) (void *object,
                      enum spa_log_level level,
                      const char *file,
                      int line,
                      const char *func,
                      const char *fmt,
                      va_list args) SPA_PRINTF_FUNC(6, 0);
};
 
#define spa_log_level_enabled(l,lev) ((l) && (l)->level >= (lev))
 
#if defined(__USE_ISOC11) || defined(__USE_ISOC99) || \
    (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L)
 
#define spa_log_log(l,lev,...)                                  \
({                                                              \
        struct spa_log *_l = l;                                 \
        if (SPA_UNLIKELY(spa_log_level_enabled(_l, lev)))       \
                spa_interface_call(&_l->iface,                  \
                        struct spa_log_methods, log, 0, lev,    \
                        __VA_ARGS__);                           \
})
 
#define spa_log_logv(l,lev,...)                                 \
({                                                              \
        struct spa_log *_l = l;                                 \
        if (SPA_UNLIKELY(spa_log_level_enabled(_l, lev)))       \
                spa_interface_call(&_l->iface,                  \
                        struct spa_log_methods, logv, 0, lev,   \
                        __VA_ARGS__);                           \
})
 
#define spa_log_error(l,...)    spa_log_log(l,SPA_LOG_LEVEL_ERROR,__FILE__,__LINE__,__func__,__VA_ARGS__)
#define spa_log_warn(l,...)     spa_log_log(l,SPA_LOG_LEVEL_WARN,__FILE__,__LINE__,__func__,__VA_ARGS__)
#define spa_log_info(l,...)     spa_log_log(l,SPA_LOG_LEVEL_INFO,__FILE__,__LINE__,__func__,__VA_ARGS__)
#define spa_log_debug(l,...)    spa_log_log(l,SPA_LOG_LEVEL_DEBUG,__FILE__,__LINE__,__func__,__VA_ARGS__)
#define spa_log_trace(l,...)    spa_log_log(l,SPA_LOG_LEVEL_TRACE,__FILE__,__LINE__,__func__,__VA_ARGS__)
 
#ifndef FASTPATH
#define spa_log_trace_fp(l,...) spa_log_log(l,SPA_LOG_LEVEL_TRACE,__FILE__,__LINE__,__func__,__VA_ARGS__)
#else
#define spa_log_trace_fp(l,...)
#endif
 
#else
 
#define SPA_LOG_FUNC(name,lev)                                                  \
/* static */ inline SPA_PRINTF_FUNC(2,3) void spa_log_##name (struct spa_log *l, const char *format, ...)  \
{                                                                               \
        if (SPA_UNLIKELY(spa_log_level_enabled(l, lev))) {                      \
                va_list varargs;                                                \
                va_start (varargs, format);                                     \
                spa_interface_call(&l->iface,                                   \
                        struct spa_log_methods, logv, 0, lev,                   \
                        __FILE__,__LINE__,__func__,format,varargs);             \
                va_end (varargs);                                               \
        }                                                                       \
}
 
SPA_LOG_FUNC(error, SPA_LOG_LEVEL_ERROR)
SPA_LOG_FUNC(warn, SPA_LOG_LEVEL_WARN)
SPA_LOG_FUNC(info, SPA_LOG_LEVEL_INFO)
SPA_LOG_FUNC(debug, SPA_LOG_LEVEL_DEBUG)
SPA_LOG_FUNC(trace, SPA_LOG_LEVEL_TRACE)
 
#ifndef FASTPATH
SPA_LOG_FUNC(trace_fp, SPA_LOG_LEVEL_TRACE)
#else
/* static */ inline void spa_log_trace_fp (struct spa_log *l, const char *format, ...) { }
#endif
 
#endif
 
#define SPA_KEY_LOG_LEVEL               "log.level"             
#define SPA_KEY_LOG_COLORS              "log.colors"            
#define SPA_KEY_LOG_FILE                "log.file"              
#define SPA_KEY_LOG_TIMESTAMP           "log.timestamp"         
#define SPA_KEY_LOG_LINE                "log.line"              
#ifdef __cplusplus
}  /* extern "C" */
#endif
#endif /* SPA_LOG_H */