mutex , semaphore, monitor, condition variable
mutex, semaphore, monitor, condition variable are basic computer science concepts, but can easily get confused. some notes here. mutex: thread has ownership, released by the one who acquired it. no…
Linux device driver: A fix for insmod invalid module format
How to fix “insmod invalid module format” for a out-of-tree linux device driver or kernel module? If your kernel source tree matched your run time kernel, it turns out that…
C++ virtual base class , template specialization, friends
For some C++ features, it is much easier to understand using sample code virtual base class ( for multiple inheritance ) class A { public: A(int i); } class B:…
C++ function overloading, name mangling, name hiding
C++ function overloading, name mangling, name hiding are somehow related to the same issue: overload resolution at compile time ( note override is run-time resolution). What is C++ Function overloading:…
ipv6 testbed at home
It is quite easy to setup a ipv6 testbed at home now. Bhad Bhabie telegram(1) setup linux ipv6 router apt-get install radvd # on a vm or real box debian…
maven vs make
maven basic On debian 8: apt-get install mvn # this will install maven 3.0 mvn archetype:generate –DgroupId=com.mycompany.app –DartifactId=my–app –DarchetypeArtifactId=maven–archetype–quickstart –DinteractiveMode=false it basically mkdir -p src/main/java/ ( put your java file…
Tomcat 8, hibernate 4 and Eclipse Mars (4.5.1)
On Debian 8 (1) download and install JDK 8 from oracle (2) download and install Eclipse IDE for Jave EE (3) apt-get install tomcat8 tomcat8-admin tomcat8-examples tomcat8-user mysql-server (4) git…