flock.c File Reference

#include <stdio.h>
#include <assert.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/types.h>
#include <idzebra/flock.h>
#include <zebra-lock.h>
#include <yaz/xmalloc.h>
#include <yaz/log.h>

Go to the source code of this file.

Data Structures
struct	zebra_lock_handle
struct	zebra_lock_info

Functions
char *	zebra_mk_fname (const char *dir, const char *name)
ZebraLockHandle	zebra_lock_create (const char *dir, const char *name)
void	zebra_lock_destroy (ZebraLockHandle h)
static int	unixLock (int fd, int type, int cmd)
int	zebra_lock_w (ZebraLockHandle h)
int	zebra_lock_r (ZebraLockHandle h)
int	zebra_unlock (ZebraLockHandle h)
static int	check_for_linuxthreads (void)
	see if the fcntl locking is not POSIX
void	zebra_flock_init ()

Variables
static int	initialized = 0
static int	posix_locks = 1
Zebra_mutex	lock_list_mutex
static struct zebra_lock_info *	lock_list = 0
static int	log_level = 0

Function Documentation

check_for_linuxthreads()

static int check_for_linuxthreads ( void  )

static

see if the fcntl locking is not POSIX

The default posix_locks=1 is assumed.. This function sets posix_locks to zero if linuxthreads is in use.

Definition at line 360 of file flock.c.

References posix_locks.

Referenced by zebra_flock_init().

unixLock()

static int unixLock ( int  fd, int  type, int  cmd  )

static

Definition at line 221 of file flock.c.

References fd, and log_level.

Referenced by zebra_lock_r(), zebra_lock_w(), and zebra_unlock().

zebra_flock_init()

void zebra_flock_init

(

void

)

Definition at line 380 of file flock.c.

References check_for_linuxthreads(), initialized, lock_list_mutex, log_level, posix_locks, and zebra_mutex_init().

Referenced by main(), and zebra_start_res().

zebra_lock_create()

ZebraLockHandle zebra_lock_create	(	const char *	dir,
		const char *	name
	)

Definition at line 106 of file flock.c.

References zebra_lock_info::fd, zebra_lock_info::file_mutex, zebra_lock_info::fname, initialized, lock_list, lock_list_mutex, log_level, zebra_lock_info::next, zebra_lock_info::no_file_read_lock, zebra_lock_info::no_file_write_lock, O_BINARY, zebra_lock_handle::p, posix_locks, zebra_lock_info::rdwr_lock, zebra_lock_info::ref_count, zebra_lock_handle::write_flag, zebra_lock_rdwr_init(), zebra_mk_fname(), zebra_mutex_init(), zebra_mutex_lock(), and zebra_mutex_unlock().

Referenced by run_func(), and zebra_select_register().

zebra_lock_destroy()

void zebra_lock_destroy

(

ZebraLockHandle

h

)

Definition at line 177 of file flock.c.

References zebra_lock_info::fd, zebra_lock_info::file_mutex, zebra_lock_info::fname, lock_list, lock_list_mutex, log_level, zebra_lock_info::next, zebra_lock_handle::p, posix_locks, zebra_lock_info::rdwr_lock, zebra_lock_info::ref_count, zebra_lock_rdwr_destroy(), zebra_mutex_destroy(), zebra_mutex_lock(), and zebra_mutex_unlock().

Referenced by run_func(), zebra_close(), and zebra_select_register().

zebra_lock_r()

int zebra_lock_r

(

ZebraLockHandle

h

)

Definition at line 277 of file flock.c.

References zebra_lock_info::fd, zebra_lock_info::file_mutex, zebra_lock_info::fname, log_level, zebra_lock_info::no_file_read_lock, zebra_lock_info::no_file_write_lock, zebra_lock_handle::p, posix_locks, zebra_lock_info::rdwr_lock, unixLock(), zebra_lock_handle::write_flag, zebra_lock_rdwr_rlock(), zebra_mutex_lock(), and zebra_mutex_unlock().

Referenced by run_func(), zebra_begin_trans(), and zebra_commit_ex().

zebra_lock_w()

int zebra_lock_w

(

ZebraLockHandle

h

)

Definition at line 240 of file flock.c.

References zebra_lock_info::fd, zebra_lock_info::file_mutex, zebra_lock_info::fname, log_level, zebra_lock_info::no_file_write_lock, zebra_lock_handle::p, posix_locks, zebra_lock_info::rdwr_lock, unixLock(), zebra_lock_handle::write_flag, zebra_lock_rdwr_wlock(), zebra_mutex_lock(), and zebra_mutex_unlock().

Referenced by run_func(), zebra_begin_trans(), and zebra_commit_ex().

zebra_mk_fname()

char * zebra_mk_fname	(	const char *	dir,
		const char *	name
	)

Definition at line 84 of file flock.c.

References zebra_lock_info::fname.

Referenced by zebra_get_state(), zebra_lock_create(), and zebra_set_state().

zebra_unlock()

int zebra_unlock

(

ZebraLockHandle

h

)

Definition at line 313 of file flock.c.

References zebra_lock_info::fd, zebra_lock_info::file_mutex, zebra_lock_info::fname, log_level, zebra_lock_info::no_file_read_lock, zebra_lock_info::no_file_write_lock, zebra_lock_handle::p, posix_locks, zebra_lock_info::rdwr_lock, unixLock(), zebra_lock_handle::write_flag, zebra_lock_rdwr_runlock(), zebra_lock_rdwr_wunlock(), zebra_mutex_lock(), and zebra_mutex_unlock().

Referenced by run_func(), zebra_begin_trans(), zebra_commit_ex(), and zebra_end_transaction().

Variable Documentation

initialized

int initialized = 0

static

have this module (mutex) been initialized?

Definition at line 44 of file flock.c.

Referenced by zebra_flock_init(), and zebra_lock_create().

lock_list

struct zebra_lock_info* lock_list = 0

static

our list of file locked files

Definition at line 53 of file flock.c.

Referenced by zebra_lock_create(), and zebra_lock_destroy().

lock_list_mutex

Zebra_mutex lock_list_mutex

mutex for lock_list below

Definition at line 50 of file flock.c.

Referenced by zebra_flock_init(), zebra_lock_create(), and zebra_lock_destroy().

log_level

int log_level = 0

static

Definition at line 82 of file flock.c.

Referenced by unixLock(), zebra_flock_init(), zebra_lock_create(), zebra_lock_destroy(), zebra_lock_r(), zebra_lock_w(), zebra_snippets_log(), and zebra_unlock().

posix_locks

int posix_locks = 1

static

whether fcntl locks are shared for all threads in a process (POSIX)

Definition at line 47 of file flock.c.

Referenced by check_for_linuxthreads(), zebra_flock_init(), zebra_lock_create(), zebra_lock_destroy(), zebra_lock_r(), zebra_lock_w(), and zebra_unlock().