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# *******************************************************************************
# * Copyright (c) 2011 Wind River Systems, Inc. and others.
# * All rights reserved. This program and the accompanying materials
# * are made available under the terms of the Eclipse Public License v1.0
# * which accompanies this distribution, and is available at
# * http://www.eclipse.org/legal/epl-v10.html
# *
# * Contributors:
# * Wind River Systems - initial API and implementation
# *******************************************************************************
"Internal utility methods used for logging/tracing."
from tcf import protocol
import locale, time, cStringIO
DECIMAL_DELIMITER = locale.localeconv().get('decimal_point', '.')
def getDebugTime():
"""
Returns a relative timestamp in the form "seconds,milliseconds". Each
segment is zero-padded to three digits, ensuring a consistent length of
seven characters. The timestamp has no absolute meaning. It is merely the
elapsed time since January 1, 1970 UT truncated at 999 seconds. Do not
use this for production code, especially for mathematically determining
the relative time between two events, since the counter will flip to zero
roughly every 16 minutes.
"""
traceBuilder = cStringIO.StringIO()
# Record the time
tm = int(time.time())
seconds = (tm / 1000) % 1000
if seconds < 100: traceBuilder.write('0')
if seconds < 10: traceBuilder.write('0')
traceBuilder.write(str(seconds))
traceBuilder.write(DECIMAL_DELIMITER)
millis = time % 1000
if millis < 100: traceBuilder.write('0')
if millis < 10: traceBuilder.write('0')
traceBuilder.write(str(millis))
return traceBuilder.getvalue()
def trace(msg):
"""
Trace hooks should use this method to log a message. It prepends the
message with a timestamp and sends it to the TCF logger facility. The
logger implementation may or may not inject its own timestamp. For
tracing, we definitely need one, so we introduce a minimal, relative-time
stamp.
@param msg the trace message
"""
protocol.log('%s msg' % (getDebugTime(), msg))
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