* [PATCH] Cygwin: console: Unify EnumWindows() callback functions.
@ 2024-02-14 14:26 Takashi Yano
0 siblings, 0 replies; only message in thread
From: Takashi Yano @ 2024-02-14 14:26 UTC (permalink / raw)
To: cygwin-patches; +Cc: Takashi Yano, Johannes Schindelin
Previously, three similar callback fuctions were used in console
code. This patch unifies these functions to ease maintenance cost.
Fixes: 8aad3a7edeb2 ("Cygwin: console: Fix a problem that minor ID is incorrect in ConEmu.")
Suggested-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Takashi Yano <takashi.yano@nifty.ne.jp>
---
winsup/cygwin/devices.cc | 25 +-------
winsup/cygwin/devices.in | 25 +-------
winsup/cygwin/fhandler/console.cc | 84 +++++++------------------
winsup/cygwin/local_includes/fhandler.h | 15 +++++
4 files changed, 39 insertions(+), 110 deletions(-)
diff --git a/winsup/cygwin/devices.cc b/winsup/cygwin/devices.cc
index ca1fdf3be..b14613bc7 100644
--- a/winsup/cygwin/devices.cc
+++ b/winsup/cygwin/devices.cc
@@ -69,28 +69,6 @@ exists_ntdev_silent (const device& dev)
return exists_ntdev (dev) ? -1 : false;
}
-static BOOL CALLBACK
-enum_cons_dev (HWND hw, LPARAM lp)
-{
- unsigned long *bitmask = (unsigned long *) lp;
- HANDLE h = NULL;
- fhandler_console::console_state *cs;
- if ((cs = fhandler_console::open_shared_console (hw, h)))
- {
- *bitmask |= (1UL << cs->tty_min_state.getntty ());
- UnmapViewOfFile ((void *) cs);
- CloseHandle (h);
- }
- else
- { /* Only for ConEmu */
- char class_hw[32];
- if (19 == GetClassName (hw, class_hw, sizeof (class_hw))
- && 0 == strcmp (class_hw, "VirtualConsoleClass"))
- EnumChildWindows (hw, enum_cons_dev, lp);
- }
- return TRUE;
-}
-
static int
exists_console (const device& dev)
{
@@ -105,8 +83,7 @@ exists_console (const device& dev)
default:
if (dev.get_minor () < MAX_CONS_DEV)
{
- unsigned long bitmask = 0;
- EnumWindows (enum_cons_dev, (LPARAM) &bitmask);
+ unsigned long bitmask = fhandler_console::console_unit (-1);
return bitmask & (1UL << dev.get_minor ());
}
return false;
diff --git a/winsup/cygwin/devices.in b/winsup/cygwin/devices.in
index 842f09c18..e15a35f25 100644
--- a/winsup/cygwin/devices.in
+++ b/winsup/cygwin/devices.in
@@ -65,28 +65,6 @@ exists_ntdev_silent (const device& dev)
return exists_ntdev (dev) ? -1 : false;
}
-static BOOL CALLBACK
-enum_cons_dev (HWND hw, LPARAM lp)
-{
- unsigned long *bitmask = (unsigned long *) lp;
- HANDLE h = NULL;
- fhandler_console::console_state *cs;
- if ((cs = fhandler_console::open_shared_console (hw, h)))
- {
- *bitmask |= (1UL << cs->tty_min_state.getntty ());
- UnmapViewOfFile ((void *) cs);
- CloseHandle (h);
- }
- else
- { /* Only for ConEmu */
- char class_hw[32];
- if (19 == GetClassName (hw, class_hw, sizeof (class_hw))
- && 0 == strcmp (class_hw, "VirtualConsoleClass"))
- EnumChildWindows (hw, enum_cons_dev, lp);
- }
- return TRUE;
-}
-
static int
exists_console (const device& dev)
{
@@ -101,8 +79,7 @@ exists_console (const device& dev)
default:
if (dev.get_minor () < MAX_CONS_DEV)
{
- unsigned long bitmask = 0;
- EnumWindows (enum_cons_dev, (LPARAM) &bitmask);
+ unsigned long bitmask = fhandler_console::console_unit (-1);
return bitmask & (1UL << dev.get_minor ());
}
return false;
diff --git a/winsup/cygwin/fhandler/console.cc b/winsup/cygwin/fhandler/console.cc
index 70824e694..66b4905f4 100644
--- a/winsup/cygwin/fhandler/console.cc
+++ b/winsup/cygwin/fhandler/console.cc
@@ -224,49 +224,46 @@ fhandler_console::open_shared_console (HWND hw, HANDLE& h, bool& created)
return res;
}
-class console_unit
-{
- int n;
- unsigned long bitmask;
- HWND me;
-
-public:
- operator int () const {return n;}
- console_unit (HWND);
- friend BOOL CALLBACK enum_windows (HWND, LPARAM);
-};
-
BOOL CALLBACK
-enum_windows (HWND hw, LPARAM lp)
+fhandler_console::enum_windows (HWND hw, LPARAM lp)
{
console_unit *this1 = (console_unit *) lp;
- if (hw == this1->me)
- return TRUE;
HANDLE h = NULL;
fhandler_console::console_state *cs;
if ((cs = fhandler_console::open_shared_console (hw, h)))
{
- this1->bitmask ^= 1UL << cs->tty_min_state.getntty ();
- UnmapViewOfFile ((void *) cs);
CloseHandle (h);
+ if (major (cs->tty_min_state.getntty ()) == DEV_CONS_MAJOR)
+ this1->bitmask |= 1UL << minor (cs->tty_min_state.getntty ());
+ if (this1->n == minor (cs->tty_min_state.getntty ()))
+ {
+ this1->shared_console_info = cs;
+ return FALSE;
+ }
+ UnmapViewOfFile ((void *) cs);
}
else
{ /* Only for ConEmu */
char class_hw[32];
if (19 == GetClassName (hw, class_hw, sizeof (class_hw))
&& 0 == strcmp (class_hw, "VirtualConsoleClass"))
- EnumChildWindows (hw, enum_windows, lp);
+ EnumChildWindows (hw, fhandler_console::enum_windows, lp);
}
return TRUE;
}
-console_unit::console_unit (HWND me0):
- bitmask (~0UL), me (me0)
+fhandler_console::console_unit::console_unit (int n0):
+ n (n0), bitmask (0)
{
- EnumWindows (enum_windows, (LPARAM) this);
- n = (_minor_t) ffs (bitmask) - 1;
+ EnumWindows (fhandler_console::enum_windows, (LPARAM) this);
+ if (n < 0)
+ n = (_minor_t) ffsl (~bitmask) - 1;
if (n < 0)
- api_fatal ("console device allocation failure - too many consoles in use, max consoles is 64");
+ api_fatal (sizeof (bitmask) == 8 ?
+ "console device allocation failure - "
+ "too many consoles in use, max consoles is 64" :
+ "console device allocation failure - "
+ "too many consoles in use, max consoles is 32");
}
static DWORD
@@ -640,39 +637,6 @@ skip_writeback:
free (input_tmp);
}
-struct scan_console_args_t
-{
- _minor_t unit;
- fhandler_console::console_state **shared_console_info;
-};
-
-BOOL CALLBACK
-scan_console (HWND hw, LPARAM lp)
-{
- scan_console_args_t *p = (scan_console_args_t *) lp;
- HANDLE h = NULL;
- fhandler_console::console_state *cs;
- if ((cs = fhandler_console::open_shared_console (hw, h)))
- {
- if (p->unit == minor (cs->tty_min_state.getntty ()))
- {
- *p->shared_console_info = cs;
- CloseHandle (h);
- return FALSE;
- }
- UnmapViewOfFile ((void *) cs);
- CloseHandle (h);
- }
- else
- { /* Only for ConEmu */
- char class_hw[32];
- if (19 == GetClassName (hw, class_hw, sizeof (class_hw))
- && 0 == strcmp (class_hw, "VirtualConsoleClass"))
- EnumChildWindows (hw, scan_console, lp);
- }
- return TRUE;
-}
-
bool
fhandler_console::set_unit ()
{
@@ -696,11 +660,7 @@ fhandler_console::set_unit ()
else
{
if (!generic_console && (dev_t) myself->ctty != get_device ())
- {
- /* Scan for existing shared console info */
- scan_console_args_t arg = { unit, &shared_console_info[unit] };
- EnumWindows (scan_console, (LPARAM) &arg);
- }
+ shared_console_info[unit] = console_unit (unit);
if (generic_console || !shared_console_info[unit])
{
me = GetConsoleWindow ();
@@ -714,7 +674,7 @@ fhandler_console::set_unit ()
ProtectHandleINH (cygheap->console_h);
if (created)
{
- unit = console_unit (me);
+ unit = console_unit (-1);
cs->tty_min_state.setntty (DEV_CONS_MAJOR, unit);
}
else
diff --git a/winsup/cygwin/local_includes/fhandler.h b/winsup/cygwin/local_includes/fhandler.h
index 8e3088447..a2017f618 100644
--- a/winsup/cygwin/local_includes/fhandler.h
+++ b/winsup/cygwin/local_includes/fhandler.h
@@ -2259,6 +2259,8 @@ private:
static void set_output_mode (tty::cons_mode m, const termios *t,
const handle_set_t *p);
+ static BOOL CALLBACK enum_windows (HWND hw, LPARAM lp);
+
public:
pid_t tc_getpgid ()
{
@@ -2380,6 +2382,19 @@ private:
void wpbuf_send ();
int fstat (struct stat *buf);
+ class console_unit
+ {
+ int n;
+ unsigned long bitmask;
+ console_state *shared_console_info;
+ public:
+ operator _minor_t () const {return n;}
+ operator console_state * () const {return shared_console_info;}
+ operator unsigned long () const {return bitmask;}
+ console_unit (int);
+ friend BOOL CALLBACK fhandler_console::enum_windows (HWND, LPARAM);
+ };
+
friend tty_min * tty_list::get_cttyp ();
};
--
2.43.0
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