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* fhandler.cc (fhandler_base::lock): Move to flock.cc. 

(fhandler_base::fixup_after_exec): Reset mandatory_locking.
	* fhandler.h (class fhandler_base): Add mandatory_locking status flag.
	Add mandatory_locking accessor methods.  Accommodate change throughout.
	(fhandler_base::mand_lock): Declare.
	(class fhandler_disk_file): Drop in favor of new status flag.
	* (fhandler_disk_file::fcntl): Call need_fork_fixup if mandatory_locking
	flag gets set.
	* flock.cc (fhandler_base::lock): Define here.
	(flock): Handle mandatory_locking.
	(lockf): Ditto.
	(fhandler_base::mand_lock): Define.
This commit is contained in:
Corinna Vinschen 2013-06-04 10:24:43 +00:00
parent ca1dd3a9b5
commit edd73646f3
6 changed files with 51 additions and 22 deletions
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15
winsup/cygwin/ChangeLog
View File

@ -1,3 +1,18 @@
2013-06-04 Corinna Vinschen <corinna@vinschen.de>
* fhandler.cc (fhandler_base::lock): Move to flock.cc.
(fhandler_base::fixup_after_exec): Reset mandatory_locking.
* fhandler.h (class fhandler_base): Add mandatory_locking status flag.
Add mandatory_locking accessor methods. Accommodate change throughout.
(fhandler_base::mand_lock): Declare.
(class fhandler_disk_file): Drop in favor of new status flag.
* (fhandler_disk_file::fcntl): Call need_fork_fixup if mandatory_locking
flag gets set.
* flock.cc (fhandler_base::lock): Define here.
(flock): Handle mandatory_locking.
(lockf): Ditto.
(fhandler_base::mand_lock): Define.
2013-06-03 Corinna Vinschen <corinna@vinschen.de>
* sigproc.cc (exit_thread): Allow to exit the thread while running

8
winsup/cygwin/fhandler.cc
View File

@ -1230,13 +1230,6 @@ fhandler_base::ioctl (unsigned int cmd, void *buf)
return res;
}
int
fhandler_base::lock (int, struct flock *)
{
set_errno (EINVAL);
return -1;
}
int __reg2
fhandler_base::fstat (struct stat *buf)
{
@ -1553,6 +1546,7 @@ fhandler_base::fixup_after_exec ()
debug_printf ("here for '%s'", get_name ());
if (unique_id && close_on_exec ())
del_my_locks (after_exec);
mandatory_locking (false);
}
void
fhandler_base_overlapped::fixup_after_exec ()

6
winsup/cygwin/fhandler.h
View File

@ -147,12 +147,13 @@ class fhandler_base
unsigned close_on_exec : 1; /* close-on-exec */
unsigned need_fork_fixup : 1; /* Set if need to fixup after fork. */
unsigned isclosed : 1; /* Set when fhandler is closed. */
unsigned mandatory_locking : 1; /* Windows mandatory locking */
public:
status_flags () :
rbinary (0), rbinset (0), wbinary (0), wbinset (0), nohandle (0),
did_lseek (0), query_open (no_query), close_on_exec (0),
need_fork_fixup (0), isclosed (0)
need_fork_fixup (0), isclosed (0), mandatory_locking (0)
{}
} status, open_status;
@ -247,6 +248,7 @@ class fhandler_base
IMPLEMENT_STATUS_FLAG (bool, close_on_exec)
IMPLEMENT_STATUS_FLAG (bool, need_fork_fixup)
IMPLEMENT_STATUS_FLAG (bool, isclosed)
IMPLEMENT_STATUS_FLAG (bool, mandatory_locking)
int get_default_fmode (int flags);
@ -360,6 +362,7 @@ public:
virtual ssize_t __reg3 pwrite (void *, size_t, off_t);
virtual off_t lseek (off_t offset, int whence);
virtual int lock (int, struct flock *);
virtual int mand_lock (int, struct flock *);
virtual int dup (fhandler_base *child, int flags);
virtual int fpathconf (int);
@ -963,7 +966,6 @@ class fhandler_dev_tape: public fhandler_dev_raw
class fhandler_disk_file: public fhandler_base
{
HANDLE prw_handle;
bool mandatory_locking;
int __reg3 readdir_helper (DIR *, dirent *, DWORD, DWORD, PUNICODE_STRING fname);
int prw_open (bool);

12
winsup/cygwin/fhandler_disk_file.cc
View File

@ -1379,12 +1379,12 @@ fhandler_base::utimens_fs (const struct timespec *tvp)
}
fhandler_disk_file::fhandler_disk_file () :
fhandler_base (), prw_handle (NULL), mandatory_locking (false)
fhandler_base (), prw_handle (NULL)
{
}
fhandler_disk_file::fhandler_disk_file (path_conv &pc) :
fhandler_base (), prw_handle (NULL), mandatory_locking (false)
fhandler_base (), prw_handle (NULL)
{
set_name (pc);
}
@ -1415,7 +1415,8 @@ fhandler_disk_file::fcntl (int cmd, intptr_t arg)
switch (cmd)
{
case F_LCK_MANDATORY:
mandatory_locking = !!arg;
mandatory_locking (!!arg);
need_fork_fixup (true);
res = 0;
break;
case F_GETLK:
@ -1424,7 +1425,7 @@ fhandler_disk_file::fcntl (int cmd, intptr_t arg)
{
struct flock *fl = (struct flock *) arg;
fl->l_type &= F_RDLCK | F_WRLCK | F_UNLCK;
res = mandatory_locking ? mand_lock (cmd, fl) : lock (cmd, fl);
res = mandatory_locking () ? mand_lock (cmd, fl) : lock (cmd, fl);
}
break;
default:
@ -1445,7 +1446,6 @@ fhandler_disk_file::dup (fhandler_base *child, int flags)
GetCurrentProcess (), &fhc->prw_handle,
0, TRUE, DUPLICATE_SAME_ACCESS))
fhc->prw_handle = NULL;
fhc->mandatory_locking = mandatory_locking;
return ret;
}
@ -1453,7 +1453,7 @@ void
fhandler_disk_file::fixup_after_fork (HANDLE parent)
{
prw_handle = NULL;
mandatory_locking = false;
mandatory_locking (false);
fhandler_base::fixup_after_fork (parent);
}

28
winsup/cygwin/flock.cc
View File

@ -918,6 +918,13 @@ static void lf_wakelock (lockf_t *, HANDLE);
/* This is the fcntl advisory lock implementation. For the implementation
of mandatory locks using the Windows mandatory locking functions, see the
fhandler_disk_file::mand_lock method at the end of this file. */
int
fhandler_base::lock (int, struct flock *)
{
set_errno (EINVAL);
return -1;
}
int
fhandler_disk_file::lock (int a_op, struct flock *fl)
{
@ -1733,19 +1740,22 @@ flock (int fd, int operation)
switch (operation & (~LOCK_NB))
{
case LOCK_EX:
fl.l_type = F_WRLCK | F_FLOCK;
fl.l_type = F_WRLCK;
break;
case LOCK_SH:
fl.l_type = F_RDLCK | F_FLOCK;
fl.l_type = F_RDLCK;
break;
case LOCK_UN:
fl.l_type = F_UNLCK | F_FLOCK;
fl.l_type = F_UNLCK;
break;
default:
set_errno (EINVAL);
goto done;
}
res = cfd->lock (cmd, &fl);
if (!cfd->mandatory_locking ())
fl.l_type |= F_FLOCK;
res = cfd->mandatory_locking () ? cfd->mand_lock (cmd, &fl)
: cfd->lock (cmd, &fl);
if ((res == -1) && ((get_errno () == EAGAIN) || (get_errno () == EACCES)))
set_errno (EWOULDBLOCK);
done:
@ -1803,7 +1813,8 @@ lockf (int filedes, int function, off_t size)
goto done;
/* NOTREACHED */
}
res = cfd->lock (cmd, &fl);
res = cfd->mandatory_locking () ? cfd->mand_lock (cmd, &fl)
: cfd->lock (cmd, &fl);
done:
syscall_printf ("%R = lockf(%d, %d, %D)", res, filedes, function, size);
return res;
@ -1831,6 +1842,13 @@ blocking_lock_thr (LPVOID param)
return 0;
}
int
fhandler_base::mand_lock (int, struct flock *)
{
set_errno (EINVAL);
return -1;
}
int
fhandler_disk_file::mand_lock (int a_op, struct flock *fl)
{

4
winsup/cygwin/release/1.7.19
View File

@ -10,8 +10,8 @@ What's new:
- Add support for the AFS filesystem.
- Preliminary support for mandatory locking via fcntl, using Windows
locking semantics. New F_LCK_MANDATORY fcntl command.
- Support for mandatory locking via fcntl/flock/lockf, using Windows locking
semantics. New F_LCK_MANDATORY fcntl command.
- New APIs: __b64_ntop, __b64_pton, arc4random, arc4random_addrandom,
arc4random_buf, arc4random_stir, arc4random_uniform.