blob: e8ddc388bd3f72987f7ee4c3c57928f9a316c82e (
plain) (
blame)
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
|
/**
* @file
*
* @brief Removes Routine from Top of Calling Thread's stack and Invoke it
* @ingroup POSIXAPI
*/
/*
* COPYRIGHT (c) 1989-2008.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <pthread.h>
#include <rtems/score/thread.h>
#include <rtems/score/threaddispatch.h>
#include <rtems/posix/threadsup.h>
#ifndef HAVE_STRUCT__PTHREAD_CLEANUP_CONTEXT
#include <rtems/score/chainimpl.h>
#include <rtems/score/isr.h>
#include <rtems/score/wkspace.h>
#include <rtems/posix/cancel.h>
#include <rtems/posix/pthreadimpl.h>
/*
* 18.2.3.1 Establishing Cancellation Handlers, P1003.1c/Draft 10, p. 184
*/
void pthread_cleanup_pop(
int execute
)
{
POSIX_Cancel_Handler_control *handler;
POSIX_Cancel_Handler_control tmp_handler;
Chain_Control *handler_stack;
POSIX_API_Control *thread_support;
ISR_Level level;
thread_support = _Thread_Executing->API_Extensions[ THREAD_API_POSIX ];
handler_stack = &thread_support->Cancellation_Handlers;
/*
* We need interrupts disabled to safely check the chain and pull
* the last element off. But we also need dispatching disabled to
* ensure that we do not get prempted and deleted while we are holding
* memory that needs to be freed.
*/
_Thread_Disable_dispatch();
_ISR_Disable( level );
if ( _Chain_Is_empty( handler_stack ) ) {
_Thread_Enable_dispatch();
_ISR_Enable( level );
return;
}
handler = (POSIX_Cancel_Handler_control *)
_Chain_Tail( handler_stack )->previous;
_Chain_Extract_unprotected( &handler->Node );
_ISR_Enable( level );
tmp_handler = *handler;
_Workspace_Free( handler );
_Thread_Enable_dispatch();
if ( execute )
(*tmp_handler.routine)( tmp_handler.arg );
}
#else /* HAVE_STRUCT__PTHREAD_CLEANUP_CONTEXT */
void _pthread_cleanup_pop(
struct _pthread_cleanup_context *context,
int execute
)
{
POSIX_API_Control *thread_support;
if ( execute != 0 ) {
( *context->_routine )( context->_arg );
}
_Thread_Disable_dispatch();
thread_support = _Thread_Executing->API_Extensions[ THREAD_API_POSIX ];
thread_support->last_cleanup_context = context->_previous;
_Thread_Enable_dispatch();
}
#endif /* HAVE_STRUCT__PTHREAD_CLEANUP_CONTEXT */
|
