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c++google-codeglog

Are google log entries wrapped by a mutex?

Using Google's logging library (glog-0.3.2), are the individual entries sent to the log wrapped by a mutex? That is, can other entries corrupt the entry currently being saved?

I guess that translates to: is glog threadsafe?

And if the logger is set to echo to console as well as to file, short of having my own mutex, is there any way to block printf/cout from corrupting the output from LOG()? I suspect not but wondered if perhaps there is a way to lock the mutex that can wrap several statements.

Solution

  • Yes, glog can be threadsafe.

    Raw Logging

    The header file can be used for thread-safe logging, which does not allocate any memory or acquire any locks. Therefore, the macros defined in this header file can be used by low-level memory allocation and synchronization code. Please check src/glog/raw_logging.h.in for detail.

    http://google-glog.googlecode.com/svn/trunk/doc/glog.html