lib.c File Reference

#include "tests/lib.h"
#include <random.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include <syscall.h>

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Functions
static void	vmsg (const char *format, va_list args, const char *suffix)
void	msg (const char *format,...)
void	fail (const char *format,...)
static void	swap (void *a_, void *b_, size_t size)
void	shuffle (void *buf_, size_t cnt, size_t size)
void	exec_children (const char *child_name, pid_t pids[], size_t child_cnt)
void	wait_children (pid_t pids[], size_t child_cnt)
void	check_file_handle (int fd, const char *file_name, const void *buf_, size_t size)
void	check_file (const char *file_name, const void *buf, size_t size)
void	compare_bytes (const void *read_data_, const void *expected_data_, size_t size, size_t ofs, const char *file_name)
	test/lib.h More...

Variables
const char *	test_name
	Child process for syn-read test. More...
bool	quiet = false

Function Documentation

check_file()

void check_file	(	const char *	file_name,
		const void *	buf,
		size_t	size
	)

Definition at line 151 of file lib.c.

References buf, CHECK, check_file_handle(), close(), file_name, msg(), and open().

Referenced by seq_test(), and test_main().

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check_file_handle()

void check_file_handle	(	int	fd,
		const char *	file_name,
		const void *	buf_,
		size_t	size
	)

Definition at line 108 of file lib.c.

References block_size(), buf, compare_bytes(), fail(), file_name, filesize(), msg(), and read().

Referenced by check_file(), and test_main().

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compare_bytes()

void compare_bytes	(	const void *	read_data_,
		const void *	expected_data_,
		size_t	size,
		size_t	ofs,
		const char *	file_name
	)

test/lib.h

Definition at line 163 of file lib.c.

References fail(), file_name, hex_dump(), memcmp(), msg(), and quiet.

Referenced by check_file_handle(), main(), and test_main().

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exec_children()

void exec_children	(	const char *	child_name,
		pid_t	pids[],
		size_t	child_cnt
	)

Definition at line 80 of file lib.c.

References CHECK, exec(), PID_ERROR, and snprintf().

Referenced by test_main().

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fail()

void fail	(	const char *	format,
			...
	)

Definition at line 40 of file lib.c.

References exit(), va_end, va_start, and vmsg().

Referenced by check_file_handle(), check_file_size(), check_tell(), compare_bytes(), main(), seq_test(), test_main(), test_sleep(), verify(), wrap_open(), and write_some_bytes().

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msg()

void msg	(	const char *	format,
			...
	)

Definition at line 28 of file lib.c.

References quiet, va_start, and vmsg().

Referenced by a_thread_func(), acquire1_thread_func(), acquire2_thread_func(), acquire_thread_func(), alarm_priority_thread(), b_thread_func(), block_thread(), c_thread_func(), changing_thread(), check_file(), check_file_handle(), compare_bytes(), donor_thread_func(), fail_io(), h_thread_func(), high_thread_func(), init(), interloper_thread_func(), l_thread_func(), m_thread_func(), main(), make_tree(), medium_thread_func(), merge(), priority_condvar_thread(), priority_sema_thread(), remove_tree(), seq_test(), simple_thread_func(), sort_chunks(), test_main(), test_mlfqs_fair(), test_sleep(), and verify().

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shuffle()

void shuffle	(	void *	buf_,
		size_t	cnt,
		size_t	size
	)

Definition at line 67 of file lib.c.

References buf, random_ulong(), and swap().

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swap()

static void swap ( void *  a_, void *  b_, size_t  size  )

static

Definition at line 52 of file lib.c.

Referenced by shuffle().

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vmsg()

static void vmsg ( const char *  format, va_list  args, const char *  suffix  )

static

Definition at line 12 of file lib.c.

References buf, snprintf(), STDOUT_FILENO, strlcpy(), strlen(), test_name, vsnprintf(), and write().

Referenced by fail(), and msg().

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wait_children()

void wait_children	(	pid_t	pids[],
		size_t	child_cnt
	)

Definition at line 94 of file lib.c.

References CHECK, and wait().

Referenced by test_main().

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Variable Documentation

quiet

bool quiet = false

Definition at line 9 of file lib.c.

Referenced by compare_bytes(), main(), make_tree(), msg(), remove_tree(), sort_chunks(), test_main(), and try_write().

test_name

const char* test_name

Child process for syn-read test.

Reads the contents of a test file a byte at a time, in the hope that this will take long enough that we can get a significant amount of contention in the kernel file system code.

Child process for syn-read test.

Reads from a file created by our parent process, which is growing it. We loop until we've read the whole file successfully. Many iterations through the loop will return 0 bytes, because the file has not grown in the meantime. That is, we are "busy waiting" for the file to grow. (This test could be improved by adding a "yield" system call and calling yield whenever we receive a 0-byte read.)

Definition at line 8 of file lib.c.

Referenced by vmsg().