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Cygwin: FIFO: remember the type of the fhandler 

Add data members 'reader', 'writer', and 'duplexer' to the
fhandler_fifo class.  Set them in fhandler_fifo::open.  ('duplexer'
replaces the previous '_duplexer'.)

This will be useful in later commits.
This commit is contained in:
Ken Brown 2019-04-14 19:15:57 +00:00 committed by Corinna Vinschen
parent 5281699926
commit 1643789517
2 changed files with 5 additions and 11 deletions
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2
winsup/cygwin/fhandler.h
View File

@ -1272,7 +1272,7 @@ class fhandler_fifo: public fhandler_base
fifo_client_handler fc_handler[MAX_CLIENTS];
int nhandlers, nconnected;
af_unix_spinlock_t _fifo_client_lock;
bool _duplexer;
bool reader, writer, duplexer;
bool __reg2 wait (HANDLE);
NTSTATUS npfs_handle (HANDLE &);
HANDLE create_pipe_instance (bool);

14
winsup/cygwin/fhandler_fifo.cc
View File

@ -33,7 +33,7 @@ STATUS_PIPE_EMPTY simply means there's no data to be read. */
fhandler_fifo::fhandler_fifo ():
fhandler_base (), read_ready (NULL), write_ready (NULL),
listen_client_thr (NULL), lct_termination_evt (NULL), nhandlers (0),
nconnected (0), _duplexer (false)
nconnected (0), reader (false), writer (false), duplexer (false)
{
pipe_name_buf[0] = L'\0';
need_fork_fixup (true);
@ -224,7 +224,7 @@ fhandler_fifo::create_pipe_instance (bool first)
}
access = GENERIC_READ | FILE_READ_ATTRIBUTES | FILE_WRITE_ATTRIBUTES
| SYNCHRONIZE;
if (first && _duplexer)
if (first && duplexer)
access |= GENERIC_WRITE;
sharing = FILE_SHARE_READ | FILE_SHARE_WRITE;
hattr = OBJ_INHERIT;
@ -421,25 +421,19 @@ fhandler_fifo::open (int flags, mode_t)
error_errno_set,
error_set_errno
} res;
bool reader, writer, duplexer;
/* Determine what we're doing with this fhandler: reading, writing, both */
switch (flags & O_ACCMODE)
{
case O_RDONLY:
reader = true;
writer = false;
duplexer = false;
break;
case O_WRONLY:
writer = true;
reader = false;
duplexer = false;
break;
case O_RDWR:
reader = true;
writer = false;
duplexer = _duplexer = true;
duplexer = true;
break;
default:
set_errno (EINVAL);
@ -769,7 +763,7 @@ fhandler_fifo::raw_read (void *in_ptr, size_t& len)
fifo_client_unlock ();
goto errout;
}
else if (nread == 0 && (!_duplexer || i > 0))
else if (nread == 0 && (!duplexer || i > 0))
/* Client has disconnected. */
{
fc_handler[i].state = fc_invalid;