Format a message to the thread-safe ACE logging mechanism. Valid options (prefixed by '%', as in printf format strings) include:
* - 'A': print an ACE_timer_t value (which could be either double or ACE_UINT32.)
* - 'a': abort the program at this point abruptly.
* - 'c': print a character
* - 'C': print a character string
* - 'i', 'd': print a decimal number
* - 'I': indent according to nesting depth (obtained from ACE_Trace::get_nesting_indent()).
* - 'e', 'E', 'f', 'F', 'g', 'G': print a double
* - 'l': print line number where an error occurred.
* - 'M': print the name of the priority of the message.
* - 'm': return the message corresponding to errno value, e.g., as done by strerror()
* - 'N': print file name where the error occurred.
* - 'n': print the name of the program (or "" if not set)
* - 'o': print as an octal number
* - 'P': print out the current process id
* - 'p': print out the appropriate errno message from sys_errlist, e.g., as done by perror()
* - 'Q': print out the uint64 number
* - 'q': print out the int64 number
* - '@': print a void* pointer (in hexadecimal)
* - 'r': call the function pointed to by the corresponding argument
* - 'R': print return status
* - 'S': print out the appropriate _sys_siglist entry corresponding to var-argument.
* - 's': print out a character string
* - 'T': print timestamp in hour:minute:sec:usec format.
* - 'D': print timestamp in month/day/year hour:minute:sec:usec format.
* - 't': print thread id (1 if single-threaded)
* - 'u': print as unsigned int
* - 'w': prints a wide character
* - 'W': print a wide character string
* - 'x': print as a hex number
* - 'X': print as a hex number
* - 'z': print an ACE_OS::WChar character
* - 'Z': print an ACE_OS::WChar character string
* - '%': print out a single percent sign, '%'
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