This is a simple implementation of rwlock.

Usage:
	help				Display this information.

	make				Compile the project.

	make run [options]		Run the test.

	Options:
		READER=<num>		Set up <num>(default=5) readers.
					Can not be greater than ASIZE(default=100).

		WRITER=<num>		Set up <num>(default=1) writers.

	make check			Check the log file.