mozglue/linker/Logging.h
author Rok Garbas <rok@garbas.si>
Thu, 24 Oct 2019 10:46:35 +0300
branchTHUNDERBIRD_60_VERBRANCH
changeset 451336 4f509288cfcabfd5ce6a6f3f6b5e11d239781719
parent 450616 4bcb64fd8fa1aae1bdb7a2a019a283eacb7af4ca
permissions -rw-r--r--
Bug 1590728 - uplifting (Bug 1557255) switch from relengapi-proxy to taskcluster-proxy in taskgraph. a=jorgk DONTBUILD CLOSED TREE Differential Revision: https://phabricator.services.mozilla.com/D50439

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
 * You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef Logging_h
#define Logging_h

#include "mozilla/Likely.h"
#include "mozilla/MacroArgs.h"

#ifdef ANDROID
#include <android/log.h>
#define LOG(...) \
  __android_log_print(ANDROID_LOG_INFO, "GeckoLinker", __VA_ARGS__)
#define WARN(...) \
  __android_log_print(ANDROID_LOG_WARN, "GeckoLinker", __VA_ARGS__)
#define ERROR(...) \
  __android_log_print(ANDROID_LOG_ERROR, "GeckoLinker", __VA_ARGS__)
#else
#include <cstdio>

/* Expand to 1 or m depending on whether there is one argument or more
 * given. */
#define MOZ_ONE_OR_MORE_ARGS_IMPL2(_1, _2, _3, _4, _5, _6, _7, _8, _9, N, ...) N
#define MOZ_ONE_OR_MORE_ARGS_IMPL(args) MOZ_ONE_OR_MORE_ARGS_IMPL2 args
#define MOZ_ONE_OR_MORE_ARGS(...) \
  MOZ_ONE_OR_MORE_ARGS_IMPL((__VA_ARGS__, m, m, m, m, m, m, m, m, 1, 0))

#define MOZ_MACRO_GLUE(a, b) a b

/* Some magic to choose between LOG1 and LOGm depending on the number of
 * arguments */
#define MOZ_CHOOSE_LOG(...)                                          \
  MOZ_MACRO_GLUE(MOZ_CONCAT(LOG, MOZ_ONE_OR_MORE_ARGS(__VA_ARGS__)), \
                 (__VA_ARGS__))

#define LOG1(format) fprintf(stderr, format "\n")
#define LOGm(format, ...) fprintf(stderr, format "\n", __VA_ARGS__)
#define LOG(...) MOZ_CHOOSE_LOG(__VA_ARGS__)
#define WARN(...) MOZ_CHOOSE_LOG("Warning: " __VA_ARGS__)
#define ERROR(...) MOZ_CHOOSE_LOG("Error: " __VA_ARGS__)

#endif

class Logging {
 public:
  static bool isVerbose() { return Singleton.verbose; }

 private:
  bool verbose;

 public:
  static void Init() {
    const char *env = getenv("MOZ_DEBUG_LINKER");
    if (env && *env == '1') Singleton.verbose = true;
  }

 private:
  static Logging Singleton;
};

#define DEBUG_LOG(...)                        \
  do {                                        \
    if (MOZ_UNLIKELY(Logging::isVerbose())) { \
      LOG(__VA_ARGS__);                       \
    }                                         \
  } while (0)

#endif /* Logging_h */