mirrors/emacs
1
Fork 0
mirror of git://git.sv.gnu.org/emacs.git synced 2025-12-27 15:52:00 -08:00
Code Issues Projects Releases Wiki Activity

(dos_set_keyboard): Call Int 2Fh via the DPMI server, not directly.

Browse source 
(dos_yield_time_slice): New function.
(sys_select): Use it instead of __dpmi_yield.
This commit is contained in:
Eli Zaretskii 1998-06-14 16:19:33 +00:00
parent 106a57a4cc
commit 9a69bda1eb
1 changed files with 26 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

35
src/msdos.c
View file

@ -1272,11 +1272,13 @@ dos_set_keyboard (code, always)
int always;
{
int i;
union REGS regs;
_go32_dpmi_registers regs;
/* See if Keyb.Com is installed (for international keyboard support). */
/* See if Keyb.Com is installed (for international keyboard support).
Note: calling Int 2Fh via int86 wedges the DOS box on some versions
of Windows 9X! So don't do that! */
regs.x.ax = 0xad80;
int86 (0x2f, &regs, &regs);
_go32_dpmi_simulate_int (0x2f, &regs);
if (regs.h.al == 0xff)
international_keyboard = 1;
@ -3421,6 +3423,25 @@ sigblock (mask) int mask; { return 0; }
&& (long)(time).tv_usec <= 0))
#endif
/* This yields the rest of the current time slice to the task manager.
It should be called by any code which knows that it has nothing
useful to do except idle.
I don't use __dpmi_yield here, since versions of library before 2.02
called Int 2Fh/AX=1680h there in a way that would wedge the DOS box
on some versions of Windows 9X. */
void
dos_yield_time_slice (void)
{
_go32_dpmi_registers r;
r.x.ax = 0x1680;
r.x.ss = r.x.sp = r.x.flags = 0;
_go32_dpmi_simulate_int (0x2f, &r);
if (r.h.al == 0x80)
errno = ENOSYS;
}
/* Only event queue is checked. */
/* We don't have to call timer_check here
@ -3454,9 +3475,7 @@ sys_select (nfds, rfds, wfds, efds, timeout)
{
while (!detect_input_pending ())
{
#if __DJGPP__ >= 2
__dpmi_yield ();
#endif
dos_yield_time_slice ();
}
}
else
@ -3482,9 +3501,7 @@ sys_select (nfds, rfds, wfds, efds, timeout)
if (EMACS_TIME_ZERO_OR_NEG_P (*timeout))
return 0;
cllast = clnow;
#if __DJGPP__ >= 2
__dpmi_yield ();
#endif
dos_yield_time_slice ();
}
}