| 1 |
38 |
julius |
/* Copyright (C) 2005 Free Software Foundation, Inc.
|
| 2 |
|
|
Contributed by Richard Henderson <rth@redhat.com>.
|
| 3 |
|
|
|
| 4 |
|
|
This file is part of the GNU OpenMP Library (libgomp).
|
| 5 |
|
|
|
| 6 |
|
|
Libgomp is free software; you can redistribute it and/or modify it
|
| 7 |
|
|
under the terms of the GNU Lesser General Public License as published by
|
| 8 |
|
|
the Free Software Foundation; either version 2.1 of the License, or
|
| 9 |
|
|
(at your option) any later version.
|
| 10 |
|
|
|
| 11 |
|
|
Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
|
| 12 |
|
|
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
| 13 |
|
|
FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
|
| 14 |
|
|
more details.
|
| 15 |
|
|
|
| 16 |
|
|
You should have received a copy of the GNU Lesser General Public License
|
| 17 |
|
|
along with libgomp; see the file COPYING.LIB. If not, write to the
|
| 18 |
|
|
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
|
| 19 |
|
|
MA 02110-1301, USA. */
|
| 20 |
|
|
|
| 21 |
|
|
/* As a special exception, if you link this library with other files, some
|
| 22 |
|
|
of which are compiled with GCC, to produce an executable, this library
|
| 23 |
|
|
does not by itself cause the resulting executable to be covered by the
|
| 24 |
|
|
GNU General Public License. This exception does not however invalidate
|
| 25 |
|
|
any other reasons why the executable file might be covered by the GNU
|
| 26 |
|
|
General Public License. */
|
| 27 |
|
|
|
| 28 |
|
|
/* Provide target-specific access to the futex system call. */
|
| 29 |
|
|
|
| 30 |
|
|
#ifndef SYS_futex
|
| 31 |
|
|
#define SYS_futex 394
|
| 32 |
|
|
#endif
|
| 33 |
|
|
#define FUTEX_WAIT 0
|
| 34 |
|
|
#define FUTEX_WAKE 1
|
| 35 |
|
|
|
| 36 |
|
|
|
| 37 |
|
|
static inline void
|
| 38 |
|
|
futex_wait (int *addr, int val)
|
| 39 |
|
|
{
|
| 40 |
|
|
register long sc_0 __asm__("$0");
|
| 41 |
|
|
register long sc_16 __asm__("$16");
|
| 42 |
|
|
register long sc_17 __asm__("$17");
|
| 43 |
|
|
register long sc_18 __asm__("$18");
|
| 44 |
|
|
register long sc_19 __asm__("$19");
|
| 45 |
|
|
|
| 46 |
|
|
sc_0 = SYS_futex;
|
| 47 |
|
|
sc_16 = (long) addr;
|
| 48 |
|
|
sc_17 = FUTEX_WAIT;
|
| 49 |
|
|
sc_18 = val;
|
| 50 |
|
|
sc_19 = 0;
|
| 51 |
|
|
__asm volatile ("callsys"
|
| 52 |
|
|
: "=r" (sc_0), "=r"(sc_19)
|
| 53 |
|
|
: "0"(sc_0), "r" (sc_16), "r"(sc_17), "r"(sc_18), "1"(sc_19)
|
| 54 |
|
|
: "$1", "$2", "$3", "$4", "$5", "$6", "$7", "$8",
|
| 55 |
|
|
"$22", "$23", "$24", "$25", "$27", "$28", "memory");
|
| 56 |
|
|
}
|
| 57 |
|
|
|
| 58 |
|
|
static inline void
|
| 59 |
|
|
futex_wake (int *addr, int count)
|
| 60 |
|
|
{
|
| 61 |
|
|
register long sc_0 __asm__("$0");
|
| 62 |
|
|
register long sc_16 __asm__("$16");
|
| 63 |
|
|
register long sc_17 __asm__("$17");
|
| 64 |
|
|
register long sc_18 __asm__("$18");
|
| 65 |
|
|
register long sc_19 __asm__("$19");
|
| 66 |
|
|
|
| 67 |
|
|
sc_0 = SYS_futex;
|
| 68 |
|
|
sc_16 = (long) addr;
|
| 69 |
|
|
sc_17 = FUTEX_WAKE;
|
| 70 |
|
|
sc_18 = count;
|
| 71 |
|
|
__asm volatile ("callsys"
|
| 72 |
|
|
: "=r" (sc_0), "=r"(sc_19)
|
| 73 |
|
|
: "0"(sc_0), "r" (sc_16), "r"(sc_17), "r"(sc_18)
|
| 74 |
|
|
: "$1", "$2", "$3", "$4", "$5", "$6", "$7", "$8",
|
| 75 |
|
|
"$22", "$23", "$24", "$25", "$27", "$28", "memory");
|
| 76 |
|
|
}
|
