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
|
/* This code implemented by Mark Hammond (MHammond@skippinet.com.au) */
#include <windows.h>
#include <limits.h>
#include <pydebug.h>
long PyThread_get_thread_ident(void);
/*
* Change all headers to pure ANSI as no one will use K&R style on an
* NT
*/
/*
* Initialization of the C package, should not be needed.
*/
static void PyThread__init_thread(void)
{
}
/*
* Thread support.
*/
long PyThread_start_new_thread(void (*func)(void *), void *arg)
{
long rv;
int success = -1;
dprintf(("%ld: PyThread_start_new_thread called\n", PyThread_get_thread_ident()));
if (!initialized)
PyThread_init_thread();
rv = _beginthread(func, 0, arg); /* use default stack size */
if (rv != -1) {
success = 0;
dprintf(("%ld: PyThread_start_new_thread succeeded:\n", PyThread_get_thread_ident()));
}
return success;
}
/*
* Return the thread Id instead of an handle. The Id is said to uniquely identify the
* thread in the system
*/
long PyThread_get_thread_ident(void)
{
if (!initialized)
PyThread_init_thread();
return GetCurrentThreadId();
}
void PyThread_exit_thread(void)
{
dprintf(("%ld: PyThread_exit_thread called\n", PyThread_get_thread_ident()));
if (!initialized)
exit(0);
_endthread();
}
/*
* Lock support. It has to be implemented using Mutexes, as
* CE doesnt support semaphores. Therefore we use some hacks to
* simulate the non reentrant requirements of Python locks
*/
PyThread_type_lock PyThread_allocate_lock(void)
{
HANDLE aLock;
dprintf(("PyThread_allocate_lock called\n"));
if (!initialized)
PyThread_init_thread();
aLock = CreateEvent(NULL, /* Security attributes */
0, /* Manual-Reset */
1, /* Is initially signalled */
NULL); /* Name of event */
dprintf(("%ld: PyThread_allocate_lock() -> %p\n", PyThread_get_thread_ident(), aLock));
return (PyThread_type_lock) aLock;
}
void PyThread_free_lock(PyThread_type_lock aLock)
{
dprintf(("%ld: PyThread_free_lock(%p) called\n", PyThread_get_thread_ident(),aLock));
CloseHandle(aLock);
}
/*
* Return 1 on success if the lock was acquired
*
* and 0 if the lock was not acquired. This means a 0 is returned
* if the lock has already been acquired by this thread!
*/
int PyThread_acquire_lock(PyThread_type_lock aLock, int waitflag)
{
int success = 1;
DWORD waitResult;
dprintf(("%ld: PyThread_acquire_lock(%p, %d) called\n", PyThread_get_thread_ident(),aLock, waitflag));
#ifndef DEBUG
waitResult = WaitForSingleObject(aLock, (waitflag ? INFINITE : 0));
#else
/* To aid in debugging, we regularly wake up. This allows us to
break into the debugger */
while (TRUE) {
waitResult = WaitForSingleObject(aLock, waitflag ? 3000 : 0);
if (waitflag==0 || (waitflag && waitResult == WAIT_OBJECT_0))
break;
}
#endif
if (waitResult != WAIT_OBJECT_0) {
success = 0; /* We failed */
}
dprintf(("%ld: PyThread_acquire_lock(%p, %d) -> %d\n", PyThread_get_thread_ident(),aLock, waitflag, success));
return success;
}
void PyThread_release_lock(PyThread_type_lock aLock)
{
dprintf(("%ld: PyThread_release_lock(%p) called\n", PyThread_get_thread_ident(),aLock));
if (!SetEvent(aLock))
dprintf(("%ld: Could not PyThread_release_lock(%p) error: %l\n", PyThread_get_thread_ident(), aLock, GetLastError()));
}
|
