1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
/* Machine-dependent pthreads configuration and inline functions.
Sparc v9 version.
Copyright (C) 1997 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Richard Henderson <rth@tamu.edu>.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* Spinlock implementation; required. */
extern inline int
testandset (int *spinlock)
{
int ret;
__asm__ __volatile__("ldstub %1,%0"
: "=r"(ret), "=m"(*spinlock) : "m"(*spinlock));
return ret;
}
/* Get some notion of the current stack. Need not be exactly the top
of the stack, just something somewhere in the current frame. */
#define CURRENT_STACK_FRAME stack_pointer
register char * stack_pointer __asm__ ("%sp");
/* Registers %g6 and %g7 are reserved by the ABI for "system use". It
happens that Solaris uses %g6 for the thread pointer -- we do the same. */
struct _pthread_descr_struct;
register struct _pthread_descr_struct *__thread_self __asm__("%g6");
/* Return the thread descriptor for the current thread. */
#define THREAD_SELF __thread_self
/* Initialize the thread-unique value. */
#define INIT_THREAD_SELF(descr) (__thread_self = (descr))
/* Compare-and-swap for semaphores. */
#define HAS_COMPARE_AND_SWAP
extern inline int
__compare_and_swap (long int *p, long int oldval, long int newval)
{
long int readval;
__asm__ __volatile__ ("cas %1, %2, %0"
: "=r"(readval), "=m"(*p)
: "r"(oldval), "m"(*p), "0"(newval));
return readval == newval;
}
|
