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| -rw-r--r-- | zen/extra_log.h | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/zen/extra_log.h b/zen/extra_log.h new file mode 100644 index 00000000..3928d0f1 --- /dev/null +++ b/zen/extra_log.h @@ -0,0 +1,84 @@ +// ***************************************************************************** +// * This file is part of the FreeFileSync project. It is distributed under * +// * GNU General Public License: https://www.gnu.org/licenses/gpl-3.0 * +// * Copyright (C) Zenju (zenju AT freefilesync DOT org) - All Rights Reserved * +// ***************************************************************************** + +#ifndef EXTRA_LOG_H_601673246392441846218957402563 +#define EXTRA_LOG_H_601673246392441846218957402563 + +#include "error_log.h" +#include "thread.h" + +/* log errors in "exceptional situations" when no other means are available, e.g. + - while an exception is in flight + - cleanup errors + - nothrow GUI functions */ + +namespace zen +{ +namespace impl +{ +class ExtraLog +{ +public: + ~ExtraLog() + { + assert(reportOutstandingLog_); + if (!log_.empty() && reportOutstandingLog_) + reportOutstandingLog_(log_); + } + + void init(const std::function<void(const ErrorLog& log)>& reportOutstandingLog) + { + assert(!reportOutstandingLog_); + reportOutstandingLog_ = reportOutstandingLog; + } + + ErrorLog fetchLog() { return std::exchange(log_, ErrorLog()); } + + void logError(const std::wstring& msg) { logMsg(log_, msg, MessageType::MSG_TYPE_ERROR); } //nothrow! + +private: + ErrorLog log_; + std::function<void(const ErrorLog& log)> reportOutstandingLog_; +}; + +inline constinit Global<Protected<ExtraLog>> globalExtraLog; + +template <class Function> +auto accessExtraLog(Function fun) +{ + globalExtraLog.setOnce([] { return std::make_unique<Protected<ExtraLog>>(); }); + + if (auto protExtraLog = impl::globalExtraLog.get()) + protExtraLog->access([&](ExtraLog& log) { fun(log); }); + else + assert(false); //access after global shutdown!? => SOL! +} +} + +inline +void initExtraLog(const std::function<void(const ErrorLog& log)>& reportOutstandingLog /*nothrow! runs during global shutdown!*/) +{ + impl::accessExtraLog([&](impl::ExtraLog& el) { el.init(reportOutstandingLog); }); +} + + +inline +ErrorLog fetchExtraLog() +{ + ErrorLog output; + impl::accessExtraLog([&](impl::ExtraLog& el) { output = el.fetchLog(); }); + return output; +} + + +inline +void logExtraError(const std::wstring& msg) //nothrow! +{ + impl::accessExtraLog([&](impl::ExtraLog& el) { el.logError(msg); }); +} +} + +#endif //EXTRA_LOG_H_601673246392441846218957402563 |