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added SPDLOG_DISABLE_TID_CACHING macro to prevent invalid thread ids after fork

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This commit is contained in:
gabime 2017-11-26 00:40:47 +02:00
parent adbc22096a
commit 799ba2a57b
2 changed files with 19 additions and 9 deletions
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12
include/spdlog/details/os.h
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@ -316,7 +316,7 @@ inline int utc_minutes_offset(const std::tm& tm = details::os::localtime())
} }
//Return current thread id as size_t //Return current thread id as size_t
//It exists because the std::this_thread::get_id() is much slower(espcially under VS 2013) //It exists because the std::this_thread::get_id() is much slower(especially under VS 2013)
inline size_t _thread_id() inline size_t _thread_id()
{ {
#ifdef _WIN32 #ifdef _WIN32
@ -342,17 +342,17 @@ inline size_t _thread_id()
//Return current thread id as size_t (from thread local storage) //Return current thread id as size_t (from thread local storage)
inline size_t thread_id() inline size_t thread_id()
{ {
#if defined(_MSC_VER) && (_MSC_VER < 1900) || defined(__clang__) && !__has_feature(cxx_thread_local) #if defined(SPDLOG_DISABLE_TID_CACHING) || (defined(_MSC_VER) && (_MSC_VER < 1900)) || (defined(__clang__) && !__has_feature(cxx_thread_local))
return _thread_id(); return _thread_id();
#else #else // cache thread id in tls
static thread_local const size_t tid = _thread_id(); static thread_local const size_t tid = _thread_id();
return tid; return tid;
#endif #endif
} }
// wchar support for windows file names (SPDLOG_WCHAR_FILENAMES must be defined) // wchar support for windows file names (SPDLOG_WCHAR_FILENAMES must be defined)
#if defined(_WIN32) && defined(SPDLOG_WCHAR_FILENAMES) #if defined(_WIN32) && defined(SPDLOG_WCHAR_FILENAMES)
#define SPDLOG_FILENAME_T(s) L ## s #define SPDLOG_FILENAME_T(s) L ## s
@ -424,7 +424,7 @@ inline int pid()
} }
// Detrmine if the terminal supports colors // Determine if the terminal supports colors
// Source: https://github.com/agauniyal/rang/ // Source: https://github.com/agauniyal/rang/
inline bool is_color_terminal() inline bool is_color_terminal()
{ {

16
include/spdlog/tweakme.h
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@ -23,7 +23,7 @@
/////////////////////////////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////////////////
// Uncomment if date/time logging is not needed and never appear in the log pattern. // Uncomment if date/time logging is not needed and never appear in the log pattern.
// This will prevent spdlog from quering the clock on each log call. // This will prevent spdlog from querying the clock on each log call.
// //
// WARNING: If the log pattern contains any date/time while this flag is on, the result is undefined. // WARNING: If the log pattern contains any date/time while this flag is on, the result is undefined.
// You must set new pattern(spdlog::set_pattern(..") without any date/time in it // You must set new pattern(spdlog::set_pattern(..") without any date/time in it
@ -34,7 +34,7 @@
/////////////////////////////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////////////////
// Uncomment if thread id logging is not needed (i.e. no %t in the log pattern). // Uncomment if thread id logging is not needed (i.e. no %t in the log pattern).
// This will prevent spdlog from quering the thread id on each log call. // This will prevent spdlog from querying the thread id on each log call.
// //
// WARNING: If the log pattern contains thread id (i.e, %t) while this flag is on, the result is undefined. // WARNING: If the log pattern contains thread id (i.e, %t) while this flag is on, the result is undefined.
// //
@ -42,6 +42,16 @@
/////////////////////////////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
// Uncomment to prevent spdlog from caching thread ids in thread local storage.
// By default spdlog saves thread ids in tls to gain a few micros for each call.
//
// WARNING: if your program forks, UNCOMMENT this flag to prevent undefined thread ids in the children logs.
//
// #define SPDLOG_DISABLE_TID_CACHING
///////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////////////////
// Uncomment if logger name logging is not needed. // Uncomment if logger name logging is not needed.
// This will prevent spdlog from copying the logger name on each log call. // This will prevent spdlog from copying the logger name on each log call.
@ -59,7 +69,7 @@
/////////////////////////////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////////////////
// Uncomment to avoid locking in the registry operations (spdlog::get(), spdlog::drop() spdlog::register()). // Uncomment to avoid locking in the registry operations (spdlog::get(), spdlog::drop() spdlog::register()).
// Use only if your code never modifes concurrently the registry. // Use only if your code never modifies concurrently the registry.
// Note that upon creating a logger the registry is modified by spdlog.. // Note that upon creating a logger the registry is modified by spdlog..
// //
// #define SPDLOG_NO_REGISTRY_MUTEX // #define SPDLOG_NO_REGISTRY_MUTEX