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
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
|
/* ==== machdep.h ============================================================
* Copyright (c) 1994 Chris Provenzano (proven@athena.mit.edu) and
* Ken Raeburn (raeburn@mit.edu).
*
* engine-alpha-osf1.h,v 1.4.4.1 1995/12/13 05:41:42 proven Exp
*
*/
#include <unistd.h>
#include <setjmp.h>
#include <sys/time.h>
#include <sys/cdefs.h>
/* The first machine dependent functions are the SEMAPHORES needing
the test and set instruction.
On the Alpha, the actual values here are irrelevant; they just have
to be different. */
#define SEMAPHORE_CLEAR 0
#define SEMAPHORE_SET 1
#if 0
#define SEMAPHORE_TEST_AND_SET(lock) \
({ int *_sem_lock = (lock), locked, old; \
asm ("mb" : : : "memory"); \
do { asm ("ldl_l %0,%1" : "=r" (old) : "m" (*_sem_lock)); \
/* ?? if (old != SEMAPHORE_CLEAR) break; */ \
asm ("stl_c %0,%1" : "=r" (locked), "=m" (*_sem_lock) \
: "0" (SEMAPHORE_SET)); \
} while (!locked); \
asm ("mb" : : : "memory"); \
old == SEMAPHORE_CLEAR; })
#define SEMAPHORE_RESET(lock) \
({ int *_sem_lock = (lock); \
*_sem_lock = SEMAPHORE_CLEAR; \
asm ("mb" : : : "memory"); })
#endif
/*
* New types
*/
typedef int semaphore;
/*
* sigset_t macros
*/
#define SIG_ANY(sig) (sig)
#define SIGMAX 31
/*
* New Strutures
*/
struct machdep_pthread {
void *(*start_routine)(void *);
void *start_argument;
void *machdep_stack;
struct itimerval machdep_timer;
unsigned long machdep_istate[11];
unsigned long machdep_fstate[9];
};
/*
* Static machdep_pthread initialization values.
* For initial thread only.
*/
#define MACHDEP_PTHREAD_INIT \
{ NULL, NULL, NULL, { { 0, 0 }, { 0, 100000 } }, 0 }
/*
* Minimum stack size
*/
#define PTHREAD_STACK_MIN 2048
/*
* Some fd flag defines that are necessary to distinguish between posix
* behavior and bsd4.3 behavior.
*/
#define __FD_NONBLOCK O_NONBLOCK
/*
* New functions
*/
__BEGIN_DECLS
#if defined(PTHREAD_KERNEL)
#define __machdep_stack_get(x) (x)->machdep_stack
#define __machdep_stack_set(x, y) (x)->machdep_stack = y
#define __machdep_stack_repl(x, y) \
{ \
if (stack = __machdep_stack_get(x)) { \
__machdep_stack_free(stack); \
} \
__machdep_stack_set(x, y); \
}
void * __machdep_stack_alloc __P_((size_t));
void __machdep_stack_free __P_((void *));
int machdep_save_state __P_((void));
int __machdep_save_int_state __P_((unsigned long *));
void __machdep_restore_int_state __P_((unsigned long *));
void __machdep_save_fp_state __P_((unsigned long *));
void __machdep_restore_fp_state __P_((unsigned long *));
#endif
__END_DECLS
|
