michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
michael@0:  * You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef Logging_h
michael@0: #define Logging_h
michael@0: 
michael@0: #include "mozilla/Likely.h"
michael@0: 
michael@0: #ifdef ANDROID
michael@0: #include <android/log.h>
michael@0: #define LOG(...) __android_log_print(ANDROID_LOG_ERROR, "GeckoLinker", __VA_ARGS__)
michael@0: #else
michael@0: #include <cstdio>
michael@0: 
michael@0: /* Expand to 1 or m depending on whether there is one argument or more
michael@0:  * given. */
michael@0: #define MOZ_ONE_OR_MORE_ARGS_IMPL2(_1, _2, _3, _4, _5, _6, _7, _8, _9, N, ...) \
michael@0:   N
michael@0: #define MOZ_ONE_OR_MORE_ARGS_IMPL(args) MOZ_ONE_OR_MORE_ARGS_IMPL2 args
michael@0: #define MOZ_ONE_OR_MORE_ARGS(...) \
michael@0:   MOZ_ONE_OR_MORE_ARGS_IMPL((__VA_ARGS__, m, m, m, m, m, m, m, m, 1, 0))
michael@0: 
michael@0: #define MOZ_MACRO_GLUE(a, b) a b
michael@0: #define MOZ_CONCAT2(a, b) a ## b
michael@0: #define MOZ_CONCAT1(a, b) MOZ_CONCAT2(a, b)
michael@0: #define MOZ_CONCAT(a, b) MOZ_CONCAT1(a, b)
michael@0: 
michael@0: /* Some magic to choose between LOG1 and LOGm depending on the number of
michael@0:  * arguments */
michael@0: #define MOZ_CHOOSE_LOG(...) \
michael@0:   MOZ_MACRO_GLUE(MOZ_CONCAT(LOG, MOZ_ONE_OR_MORE_ARGS(__VA_ARGS__)), \
michael@0:                  (__VA_ARGS__))
michael@0: 
michael@0: #define LOG1(format) fprintf(stderr, format "\n")
michael@0: #define LOGm(format, ...) fprintf(stderr, format "\n", __VA_ARGS__)
michael@0: #define LOG(...) MOZ_CHOOSE_LOG(__VA_ARGS__)
michael@0: 
michael@0: #endif
michael@0: 
michael@0: class Logging
michael@0: {
michael@0: public:
michael@0:   static bool isVerbose()
michael@0:   {
michael@0:     return Singleton.verbose;
michael@0:   }
michael@0: 
michael@0: private:
michael@0:   bool verbose;
michael@0: 
michael@0: public:
michael@0:   static void Init()
michael@0:   {
michael@0:     const char *env = getenv("MOZ_DEBUG_LINKER");
michael@0:     if (env && *env == '1')
michael@0:       Singleton.verbose = true;
michael@0:   }
michael@0: 
michael@0: private:
michael@0:   static Logging Singleton;
michael@0: };
michael@0: 
michael@0: #define DEBUG_LOG(...)   \
michael@0:   do {                   \
michael@0:     if (MOZ_UNLIKELY(Logging::isVerbose())) {  \
michael@0:       LOG(__VA_ARGS__);  \
michael@0:     }                    \
michael@0:   } while(0)
michael@0: 
michael@0: #if defined(__LP64__)
michael@0: #  define PRIxAddr "lx"
michael@0: #  define PRIxSize "lx"
michael@0: #  define PRIdSize "ld"
michael@0: #  define PRIuSize "lu"
michael@0: #else
michael@0: #  define PRIxAddr "x"
michael@0: #  define PRIxSize "x"
michael@0: #  define PRIdSize "d"
michael@0: #  define PRIuSize "u"
michael@0: #endif
michael@0: 
michael@0: #endif /* Logging_h */