src/lib/metrics_buffer/log.h

// Copyright 2019 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef SRC_LIB_METRICS_BUFFER_LOG_H_
#define SRC_LIB_METRICS_BUFFER_LOG_H_

#include <lib/ddk/debug.h>

#include <string_view>

#define VLOG_ENABLED 0

#if (VLOG_ENABLED)
#define VLOGF(format, ...) LOGF(format, ##__VA_ARGS__)
#else
#define VLOGF(...) \
  do {             \
  } while (0)
#endif

#define LOGF(format, ...)             \
  do {                                \
    LOG(INFO, format, ##__VA_ARGS__); \
  } while (0)

// Temporary solution for logging in driver and non-driver contexts by logging to stderr.
// TODO(b/299990391): Replace with syslog logging interface that accommodates both driver and
// non-driver contexts, when available.
#define LOG(severity, format, ...)                                   \
  do {                                                               \
    static_assert(true || DDK_LOG_##severity);                       \
    if (DDK_LOG_##severity >= DDK_LOG_WARNING) {                     \
      fprintf(stderr, "metrics_buffer " format "\n", ##__VA_ARGS__); \
    } else if (DDK_LOG_##severity >= DDK_LOG_INFO) {                 \
      fprintf(stdout, "metrics_buffer " format "\n", ##__VA_ARGS__); \
      fflush(stdout);                                                \
    }                                                                \
  } while (0)

#endif  // SRC_LIB_METRICS_BUFFER_LOG_H_