critsec.h
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1 
8 /*
9  * The contents of this file are subject to the Mozilla Public License
10  * Version 1.0 (the "License"); you may not use this file except in
11  * compliance with the License. You may obtain a copy of the License
12  * at http://www.mozilla.org/MPL/
13  *
14  * Software distributed under the License is distributed on an "AS IS"
15  * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
16  * the License for the specific language governing rights and
17  * limitations under the License.
18  *
19  * The Original Code is legOS code, released October 17, 1999.
20  *
21  * The Initial Developer of the Original Code is Markus L. Noga.
22  * Portions created by Markus L. Noga are Copyright (C) 1999
23  * Markus L. Noga. All Rights Reserved.
24  *
25  * Contributor(s): Joseph A. Woolley <jawoolley@users.sourceforge.net>
26  */
27 
28 #if !defined(__sys_critsec_h__)
29 #define __sys_critsec_h__
30 
31 #if defined(__cplusplus)
32 extern "C" {
33 #endif // __cplusplus
34 
35 #include <config.h>
36 #include <atomic.h>
37 
38 #if defined(CONF_TM)
40 #define INITIALIZE_KERNEL_CRITICAL_SECTION() kernel_critsec_count=0
41 #define ENTER_KERNEL_CRITICAL_SECTION() atomic_inc(&kernel_critsec_count)
42 #define LEAVE_KERNEL_CRITICAL_SECTION() atomic_dec(&kernel_critsec_count)
43 #define DESTROY_KERNEL_CRITICAL_SECTION()
44 #else // CONF_TM
45 #define INITIALIZE_KERNEL_CRITICAL_SECTION()
46 #define ENTER_KERNEL_CRITICAL_SECTION()
47 #define LEAVE_KERNEL_CRITICAL_SECTION()
48 #define DESTROY_KERNEL_CRITICAL_SECTION()
49 #endif // CONF_TM
50 
51 #if defined(__cplusplus)
52 }
53 #endif // __cplusplus
54 
55 #endif // __sys_critsec_h__
56 
kernel configuration file
volatile unsigned char atomic_t
The data type that allows for atomic count operations.
Definition: atomic.h:43
atomic_t kernel_critsec_count
critical section counter for kernel/task manager
Definition: critsec.c:17
Interface: critical section management.

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