https://github.com/jcfr/singletonexperiment

Experiment with singleton in c++
https://github.com/jcfr/singletonexperiment

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Experiment with singleton in c++

• Host: GitHub
• URL: https://github.com/jcfr/singletonexperiment
• Owner: jcfr
• License: apache-2.0
• Created: 2015-03-04T00:55:17.000Z (almost 10 years ago)
• Default Branch: master
• Last Pushed: 2015-03-04T01:01:11.000Z (almost 10 years ago)
• Last Synced: 2024-11-24T07:42:06.518Z (2 months ago)
• Language: C++
• Size: 125 KB
• Stars: 0
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE_Apache_20

Awesome Lists containing this project

README

        

Experiment illustrating how a singleton class defined in a static

library named `SingletonComponent` can be linked to two shared libraries

named `Component1` and `Component2` themselves linked into a `main` executable.

```

jcfr@karakoram:~$ cd SingletonExperiment/

jcfr@karakoram:SingletonExperiment $ mkdir build

jcfr@karakoram:SingletonExperiment $ cd build

jcfr@karakoram:build $ cmake ../

-- The C compiler identification is GNU 4.8.2

-- The CXX compiler identification is GNU 4.8.2

-- Check for working C compiler: /usr/bin/cc

-- Check for working C compiler: /usr/bin/cc -- works

-- Detecting C compiler ABI info

-- Detecting C compiler ABI info - done

-- Detecting C compile features

-- Detecting C compile features - done

-- Check for working CXX compiler: /usr/bin/c++

-- Check for working CXX compiler: /usr/bin/c++ -- works

-- Detecting CXX compiler ABI info

-- Detecting CXX compiler ABI info - done

-- Detecting CXX compile features

-- Detecting CXX compile features - done

-- Setting build type to 'Debug' as none was specified.

-- Performing Test COMPILER_HAS_HIDDEN_VISIBILITY

-- Performing Test COMPILER_HAS_HIDDEN_VISIBILITY - Success

-- Performing Test COMPILER_HAS_HIDDEN_INLINE_VISIBILITY

-- Performing Test COMPILER_HAS_HIDDEN_INLINE_VISIBILITY - Success

-- Performing Test COMPILER_HAS_DEPRECATED_ATTR

-- Performing Test COMPILER_HAS_DEPRECATED_ATTR - Success

-- Configuring done

-- Generating done

-- Build files have been written to: /home/jcfr/Projects/sandbox/SingletonExperiment/build

jcfr@karakoram:build $ make

Scanning dependencies of target SingletonComponent

[ 25%] Building CXX object CMakeFiles/SingletonComponent.dir/SingletonComponent.cpp.o

Linking CXX static library libSingletonComponent.a

[ 25%] Built target SingletonComponent

Scanning dependencies of target Component1

[ 50%] Building CXX object CMakeFiles/Component1.dir/Component1.cpp.o

Linking CXX shared library libComponent1.so

[ 50%] Built target Component1

Scanning dependencies of target Component2

[ 75%] Building CXX object CMakeFiles/Component2.dir/Component2.cpp.o

Linking CXX shared library libComponent2.so

[ 75%] Built target Component2

Scanning dependencies of target main

[100%] Building CXX object CMakeFiles/main.dir/main.cpp.o

Linking CXX executable main

[100%] Built target main

jcfr@karakoram:build $ ./main 

SingletonComponent: ctor

main: Hello

Component1: ctor

SingletonComponent[0x1271010] makeSomething (called from Component1-ctor)

Component2: ctor

SingletonComponent[0x1271010] makeSomething (called from Component2-ctor)

main: Bye

Component2: dtor

Component1: dtor

SingletonComponent: dtor

```