Dear All, I am getting different behaviour of condition::timed_wait() function when I compile my code with NDEBUG flag and without NDEBUG flag. with using NDEBUG flag, timed_wait() wait for condition (mutext) as desired but whey I don't use NDEBUG flag while compiling my code it does wait for condition (mutex) but return at the same time when it is called. In both the cases return value is 1. Please note that it is not a race condition but it is happening every time. Also note that I am using other flags too for compiling my code like -Werror -pthread -fno-strict-aliasing -Wno-unused-variable -Wno-unused-parameter -Wno-unused-function -O3 -ggdb3 -m64 Please let me know what can be possible impact of NDEBUG flag on timed_wait() function. Thanking you Vishal DISCLAIMER: ----------------------------------------------------------------------------------------------------------------------- The contents of this e-mail and any attachment(s) are confidential and intended for the named recipient(s) only. It shall not attach any liability on the originator or NECHCL or its affiliates. Any views or opinions presented in this email are solely those of the author and may not necessarily reflect the opinions of NECHCL or its affiliates. Any form of reproduction, dissemination, copying, disclosure, modification, distribution and / or publication of this message without the prior written consent of the author of this e-mail is strictly prohibited. If you have received this email in error please delete it and notify the sender immediately. . -----------------------------------------------------------------------------------------------------------------------