Outline ![]()
Files ![]()
loading...
CodeScope![]()
STM32 Libraries and Samples![]()
threadx![]()
common_modules/module_manager/src/txm_module_manager_unload.c
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
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
/**************************************************************************/
/* */
/* Copyright (c) Microsoft Corporation. All rights reserved. */
/* */
/* This software is licensed under the Microsoft Software License */
/* Terms for Microsoft Azure RTOS. Full text of the license can be */
/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
/* and in the root directory of this software. */
/* */
/**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** ThreadX Component */
/** */
/** Module Manager */
/** */
/**************************************************************************/
/**************************************************************************/
#define TX_SOURCE_CODE
#include "tx_api.h"
#include "tx_byte_pool.h"
#include "tx_initialize.h"
#include "tx_mutex.h"
#include "tx_thread.h"
#include "txm_module.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _txm_module_manager_unload PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Scott Larson, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function unloads a previously loaded module. */
/* */
/* INPUT */
/* */
/* module_instance Module instance pointer */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* _tx_byte_release Release data area */
/* _tx_mutex_get Get protection mutex */
/* _tx_mutex_put Release protection mutex */
/* */
/* CALLED BY */
/* */
/* Application code */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 09-30-2020 Scott Larson Initial Version 6.1 */
/* */
/**************************************************************************/
UINT _txm_module_manager_unload(TXM_MODULE_INSTANCE *module_instance)
{
TX_INTERRUPT_SAVE_AREA
TXM_MODULE_INSTANCE *next_module, *previous_module;
CHAR *memory_ptr;
/* Check for interrupt call. */
if (TX_THREAD_GET_SYSTEM_STATE() != 0)
{
/* Now, make sure the call is from an interrupt and not initialization. */
if (TX_THREAD_GET_SYSTEM_STATE() < TX_INITIALIZE_IN_PROGRESS)
{
/* Invalid caller of this function, return appropriate error code. */
return(TX_CALLER_ERROR);
}
}
/* Determine if the module manager has not been initialized yet. */
if (_txm_module_manager_ready != TX_TRUE)
{
/* Module manager has not been initialized. */
return(TX_NOT_AVAILABLE);
}
/* Determine if the module is valid. */
if (module_instance == TX_NULL)
{
/* Invalid module pointer. */
return(TX_PTR_ERROR);
}
/* Get module manager protection mutex. */
_tx_mutex_get(&_txm_module_manager_mutex, TX_WAIT_FOREVER);
/* Determine if the module is already valid. */
if (module_instance -> txm_module_instance_id != TXM_MODULE_ID)
{
/* Release the protection mutex. */
_tx_mutex_put(&_txm_module_manager_mutex);
/* Invalid module pointer. */
return(TX_PTR_ERROR);
}
/* Determine if the module instance is in the state. */
if ((module_instance -> txm_module_instance_state != TXM_MODULE_LOADED) && (module_instance -> txm_module_instance_state != TXM_MODULE_STOPPED))
{
/* Release the protection mutex. */
_tx_mutex_put(&_txm_module_manager_mutex);
/* Return error if the module is not ready. */
return(TX_NOT_DONE);
}
/* Pickup the module data memory allocation address. */
memory_ptr = module_instance -> txm_module_instance_data_allocation_ptr;
/* Release the module's data memory. */
_tx_byte_release(memory_ptr);
/* Determine if there was memory allocated for the code. */
if (module_instance -> txm_module_instance_code_allocation_ptr)
{
/* Yes, release the module's code memory. */
memory_ptr = module_instance -> txm_module_instance_code_allocation_ptr;
/* Release the module's data memory. */
_tx_byte_release(memory_ptr);
}
/* Temporarily disable interrupts. */
TX_DISABLE
/* Clear some of the module information. */
module_instance -> txm_module_instance_id = 0;
module_instance -> txm_module_instance_state = TXM_MODULE_UNLOADED;
/* Call port-specific unload function. */
TXM_MODULE_MANAGER_MODULE_UNLOAD(module_instance);
/* Remove the module from the linked list of loaded modules. */
/* See if the module is the only one on the list. */
if ((--_txm_module_manger_loaded_count) == 0)
{
/* Only created module, just set the created list to NULL. */
_txm_module_manager_loaded_list_ptr = TX_NULL;
}
else
{
/* Otherwise, not the only created module, link-up the neighbors. */
next_module = module_instance -> txm_module_instance_loaded_next;
previous_module = module_instance -> txm_module_instance_loaded_previous;
next_module -> txm_module_instance_loaded_previous = previous_module;
previous_module -> txm_module_instance_loaded_next = next_module;
/* See if we have to update the created list head pointer. */
if (_txm_module_manager_loaded_list_ptr == module_instance)
{
/* Yes, move the head pointer to the next link. */
_txm_module_manager_loaded_list_ptr = next_module;
}
}
/* Restore interrupts. */
TX_RESTORE
/* Release the protection mutex. */
_tx_mutex_put(&_txm_module_manager_mutex);
/* Return success. */
return(TX_SUCCESS);
}