chuanwise / thread

Linux-like C thread APIs for the Analysing and Application of Linux Source Codes in Xidian University

Thread

This project, developed by Chuanwise, is for the course Analysing and Application of Linux Kernel Source Codes in the XiDian University.

Build

Run following commands in the repository directory:

cmake .
make

Test

After build, run following commands to execute the demo test test_producer_consumer located in tests/test_producer_consumer:

make test

And you'll see outputs:

Running tests...
Test project /home/chuanwise/develop/projects/thread
    Start 1: test_producer_consumer
1/1 Test #1: test_producer_consumer ...........   Passed    1.00 sec

100% tests passed, 0 tests failed out of 1

Total Test time (real) =   1.01 sec

You can find the corresponding test report in Testing/Temporary/LastTest.log:

Start testing: Dec 31 16:03 CST
----------------------------------------------------------
1/1 Testing: test_producer_consumer
1/1 Test: test_producer_consumer
Command: "/home/chuanwise/develop/projects/thread/tests/test_producer_consumer"
Directory: /home/chuanwise/develop/projects/thread/tests
"test_producer_consumer" start time: Dec 31 16:03 CST
Output:
----------------------------------------------------------
[M] waiting 
[P] procuding [C] consuming 0
[P] procuding 1
[P] procuding 2
[P] procuding 3
[P] procuding 4
[P] procuding 5
[P] procuding 6
[P] procuding 7
[C] consuming 6
[P] procuding 8
[P] procuding 9
[C] consuming 9
[C] consuming 8
[C] consuming 7
[C] consuming 5
[C] consuming 4
[C] consuming 3
[C] consuming 2
[C] consuming 1
[P] procuding 10
[P] procuding 11
[C] consuming 10
[P] procuding [C
 consuming 12
[P] procuding 13
[C] consuming [P] procuding 14
[C] consuming 14
[P] procuding 15
[C] consuming 15
[P] procuding 16
[C] consuming 16
[P] procuding 17
[C] consuming 17
[P] procuding 18
[C] consuming 18
[P] procuding 19[C] consuming 19
[P] procuding 20
[C] consuming 20
[P] procuding 21
[C] consuming 21
[P] procuding 22
[C] consuming 22
[P] procuding [C] consuming 23
[P] procuding 24
[C] consuming [P] procuding 25
[C] consuming 25
[P] procuding 26
[C] consuming 26
[P] procuding 27
[C] consuming 27
[P] procuding [C] consuming 28
[P] procuding 29
[C] consuming [P] producer exited! 
[C] consuming 11
[C] consumer exited! 
<end of output>
Test time =   1.00 sec
----------------------------------------------------------
Test Passed.
"test_producer_consumer" end time: Dec 31 16:03 CST
"test_producer_consumer" time elapsed: 00:00:01
----------------------------------------------------------

End testing: Dec 31 16:03 CST

The problem with the output format is caused by multi-threading calling printf without locking.

However, I don't want to fix it because I'm using a non-blocking queue to improve performance, and printf is just used to check if the program is running correctly. If I add locking here just for testing, then I might as well use a lock to implement the queue.

Todo

1. Remove the signal handler of main thread to prevent automatical calling of waitpid.