blob: b7de5ac950b26aaf5f4b9a3288b717c7b85ff898 (
plain)
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
145
146
147
148
|
/*
* sync.c
*
* Description:
* This translation unit implements functions related to thread
* synchronisation.
*/
#include "pthread.h"
#include "implement.h"
/*
* Code contributed by John E. Bossom <JEB>.
*/
int
pthread_detach (pthread_t tid)
/*
* ------------------------------------------------------
* DOCPUBLIC
* This function detaches the given thread.
*
* PARAMETERS
* thread
* an instance of a pthread_t
*
*
* DESCRIPTION
* This function detaches the given thread. You may
* detach the main thread or to detach a joinable thread
* (You should have used pthread_attr_t to create the
* thread as detached!)
* NOTE: detached threads cannot be joined nor canceled;
* storage is freed immediately on termination.
*
* RESULTS
* 0 successfully detached the thread,
* EINVAL thread is not a joinable thread,
* ENOSPC a required resource has been exhausted,
* ESRCH no thread could be found for 'thread',
*
* ------------------------------------------------------
*/
{
int result;
if (tid == NULL ||
tid->detachState == PTHREAD_CREATE_DETACHED)
{
result = EINVAL;
}
else
{
result = 0;
tid->detachState = PTHREAD_CREATE_DETACHED;
}
return (result);
} /* pthread_detach */
int
pthread_join (pthread_t thread, void **value_ptr)
/*
* ------------------------------------------------------
* DOCPUBLIC
* This function waits for 'thread' to terminate and
* returns the thread's exit value if 'value_ptr' is not
* NULL. This also detaches the thread on successful
* completion.
*
* PARAMETERS
* thread
* an instance of pthread_t
*
* value_ptr
* pointer to an instance of pointer to void
*
*
* DESCRIPTION
* This function waits for 'thread' to terminate and
* returns the thread's exit value if 'value_ptr' is not
* NULL. This also detaches the thread on successful
* completion.
* NOTE: detached threads cannot be joined or canceled
*
* RESULTS
* 0 'thread' has completed
* EINVAL thread is not a joinable thread,
* ESRCH no thread could be found with ID 'thread',
* EDEADLK attempt to join thread with self
*
* ------------------------------------------------------
*/
{
int result = 0;
pthread_t self;
self = pthread_self ();
if (pthread_equal (self, thread) == 0)
{
result = EDEADLK;
}
else if (thread->detachState == PTHREAD_CREATE_DETACHED)
{
result = EINVAL;
}
else
{
DWORD stat;
stat = WaitForSingleObject (thread->threadH, INFINITE);
if (stat == WAIT_OBJECT_0)
{
if (value_ptr != NULL
&& !GetExitCodeThread (thread->threadH, (LPDWORD) value_ptr))
{
result = ESRCH;
}
else
{
/*
* FIXME: This call frees memory used to hold the 'thread'
* object. 'thread' will be invalid after the first call.
*
* Only the last exiting join should free 'thread'.
*/
_pthread_threadDestroy (thread);
}
}
else
{
result = ESRCH;
}
}
return (result);
} /* pthread_join */
/* </JEB> */
|
