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* DevNotes: Add entry cgf-000011.

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* fhandler.h (fhandler_base::refcnt): Delete.
(fhandler_base::inc_refcnt): New function.
(fhandler_base::dec_refcnt): New function.
* cygheap.h (cygheap_fdnew::~cygheap_fdnew): Accommodate split of refcnt to
inc_refcnt/dec_refcnt.
(cygheap_fdget::cygheap_fdget): Ditto.
(cygheap_fdget::~cygheap_fdget::cygheap_fdget): Ditto.
* dtable.cc (dtable::release): Ditto.
(cygwin_attach_handle_to_fd): Ditto.
(dtable::init_std_file_from_handle): Ditto.
(dtable::dup3): On success, return with fdtab locked.
* dtable.h (dtable): Add dup_finish as a friend.
* syscalls.cc (dup_finish): Define new function.  Increment refcnt while fdtab
is locked.
(dup2): Use common dup_finish() to perform dup operation.
(dup3): Ditto.
This commit is contained in:
Christopher Faylor
2012-06-03 18:02:45 +00:00
parent ff80d22a7c
commit 3143cb7c00
7 changed files with 74 additions and 20 deletions
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11
winsup/cygwin/dtable.cc
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@ -243,7 +243,7 @@ dtable::release (int fd)
{
if (fds[fd]->need_fixup_before ())
dec_need_fixup_before ();
fds[fd]->refcnt (-1);
fds[fd]->dec_refcnt ();
fds[fd] = NULL;
if (fd <= 2)
set_std_handle (fd);
@ -259,7 +259,7 @@ cygwin_attach_handle_to_fd (char *name, int fd, HANDLE handle, mode_t bin,
if (!fh)
return -1;
cygheap->fdtab[fd] = fh;
cygheap->fdtab[fd]->refcnt (1);
cygheap->fdtab[fd]->inc_refcnt ();
fh->init (handle, myaccess, bin ?: fh->pc_binmode ());
return fd;
}
@ -398,7 +398,7 @@ dtable::init_std_file_from_handle (int fd, HANDLE handle)
fh->open_setup (openflags);
fh->usecount = 0;
cygheap->fdtab[fd] = fh;
cygheap->fdtab[fd]->refcnt (1);
cygheap->fdtab[fd]->inc_refcnt ();
set_std_handle (fd);
paranoid_printf ("fd %d, handle %p", fd, handle);
}
@ -713,6 +713,7 @@ dtable::dup3 (int oldfd, int newfd, int flags)
MALLOC_CHECK;
debug_printf ("dup3 (%d, %d, %p)", oldfd, newfd, flags);
lock ();
bool do_unlock = true;
if (not_open (oldfd))
{
@ -760,6 +761,7 @@ dtable::dup3 (int oldfd, int newfd, int flags)
goto done;
}
do_unlock = false;
fds[newfd] = newfh;
if ((res = newfd) <= 2)
@ -767,7 +769,8 @@ dtable::dup3 (int oldfd, int newfd, int flags)
done:
MALLOC_CHECK;
unlock ();
if (do_unlock)
unlock ();
syscall_printf ("%R = dup3(%d, %d, %p)", res, oldfd, newfd, flags);
return res;