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
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
/* GRT stack implementation for Win32 using fibers.
Copyright (C) 2005 Tristan Gingold.
GHDL is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.
GHDL 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 General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING. If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA.
*/
#include <windows.h>
#include <stdio.h>
#include <setjmp.h>
#include <assert.h>
struct stack_type
{
LPVOID fiber; // Win fiber.
void (*func)(void *); // Function
void *arg; // Function argument.
};
static struct stack_type main_stack_context;
static struct stack_type *current;
extern void grt_set_main_stack (struct stack_type *stack);
void grt_stack_init(void)
{
main_stack_context.fiber = ConvertThreadToFiber (NULL);
if (main_stack_context.fiber == NULL)
{
fprintf (stderr, "convertThreadToFiber failed (err=%lu)\n",
GetLastError ());
abort ();
}
grt_set_main_stack (&main_stack_context);
current = &main_stack_context;
}
static VOID __stdcall
grt_stack_loop (void *v_stack)
{
struct stack_type *stack = (struct stack_type *)v_stack;
while (1)
{
(*stack->func)(stack->arg);
}
}
struct stack_type *
grt_stack_create (void (*func)(void *), void *arg)
{
struct stack_type *res;
res = malloc (sizeof (struct stack_type));
if (res == NULL)
return NULL;
res->func = func;
res->arg = arg;
res->fiber = CreateFiber (0, &grt_stack_loop, res);
if (res->fiber == NULL)
{
free (res);
return NULL;
}
return res;
}
static int run_env_en;
static jmp_buf run_env;
static int need_longjmp;
void
grt_stack_switch (struct stack_type *to, struct stack_type *from)
{
assert (current == from);
current = to;
SwitchToFiber (to->fiber);
if (from == &main_stack_context && need_longjmp)
{
/* We returned to do the longjump. */
current = &main_stack_context;
longjmp (run_env, need_longjmp);
}
}
void
grt_stack_delete (struct stack_type *stack)
{
DeleteFiber (stack->fiber);
stack->fiber = NULL;
}
void
__ghdl_maybe_return_via_longjump (int val)
{
if (!run_env_en)
return;
if (current != &main_stack_context)
{
/* We are allowed to jump only in the same stack.
First switch back to the main thread. */
need_longjmp = val;
SwitchToFiber (main_stack_context.fiber);
}
else
longjmp (run_env, val);
}
int
__ghdl_run_through_longjump (int (*func)(void))
{
int res;
run_env_en = 1;
res = setjmp (run_env);
if (res == 0)
res = (*func)();
run_env_en = 0;
return res;
}
#ifndef WITH_GNAT_RUN_TIME
void __gnat_raise_storage_error(void)
{
abort ();
}
void __gnat_raise_program_error(void)
{
abort ();
}
#endif
|
