text: /*
   * Copyright © 2016 Mozilla Foundation
   *
   * This program is made available under an ISC-style license.  See the
   * accompanying file LICENSE for details.
   */
  
  #ifndef CUBEB_LOG
  #define CUBEB_LOG
  
  #include "cubeb/cubeb.h"
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  #if defined(__GNUC__) || defined(__clang__)
  #define PRINTF_FORMAT(fmt, args) __attribute__((format(printf, fmt, args)))
  #if defined(__FILE_NAME__)
  #define __FILENAME__ __FILE_NAME__
  #else
  #define __FILENAME__ (__builtin_strrchr(__FILE__, '/') ? __builtin_strrchr(__FILE__, '/') + 1 : __FILE__)
  #endif
  #else
  #define PRINTF_FORMAT(fmt, args)
  #include <string.h>
  #define __FILENAME__ (strrchr(__FILE__, '/') ? strrchr(__FILE__, '/') + 1 : __FILE__)
  #endif
  
  extern cubeb_log_level g_cubeb_log_level;
  extern cubeb_log_callback g_cubeb_log_callback PRINTF_FORMAT(1, 2);
  void cubeb_async_log(const char * fmt, ...);
  void cubeb_async_log_reset_threads();
  
  #ifdef __cplusplus
  }
  #endif
  
  #define LOGV(msg, ...) LOG_INTERNAL(CUBEB_LOG_VERBOSE, msg, ##__VA_ARGS__)
  #define LOG(msg, ...) LOG_INTERNAL(CUBEB_LOG_NORMAL, msg, ##__VA_ARGS__)
  
  #define LOG_INTERNAL(level, fmt, ...) do {                                              \
      if (g_cubeb_log_callback && level <= g_cubeb_log_level) {                           \
        g_cubeb_log_callback("%s:%d: " fmt "\n",  __FILENAME__, __LINE__, ##__VA_ARGS__); \
      }                                                                                   \
    } while(0)
  
  /* Asynchronous verbose logging, to log in real-time callbacks. */
  #define ALOGV(fmt, ...)                   \
  do {                                      \
    cubeb_async_log(fmt, ##__VA_ARGS__);    \
  } while(0)
  
  #endif // CUBEB_LOG
  