1 #ifndef __ALT_FLAG_H__
2 #define __ALT_FLAG_H__
3 
4 /******************************************************************************
5 *                                                                             *
6 * License Agreement                                                           *
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8 * Copyright (c) 2004 Altera Corporation, San Jose, California, USA.           *
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33 
34 /******************************************************************************
35 *                                                                             *
36 * THIS IS A LIBRARY READ-ONLY SOURCE FILE. DO NOT EDIT.                       *
37 *                                                                             *
38 ******************************************************************************/
39 
40 /*
41  * This header provides macro definitions that can be used to create and use
42  * uc/OS-II style event flags. These macros can be used in both a uC/OS-II based
43  * environment, and a single threaded HAL based environment.
44  *
45  * The motivation for these macros is to allow code to be developed which is
46  * thread safe under uC/OS-II, but incurs no additional overhead when used in a
47  * single threaded HAL environment.
48  *
49  * In the case of a single threaded HAL environment, they compile to
50  * "do nothing" directives, which ensures they do not contribute to the final
51  * executable.
52  *
53  * The following macros are available:
54  *
55  * ALT_FLAG_GRP        - Create a flag group instance.
56  * ALT_EXTERN_FLAG_GRP - Create a reference to an external flag group instance.
57  * ALT_STATIC_FLAG_GRP - Create a static flag group instance.
58  * ALT_FLAG_CREATE     - Initialise a flag group.
59  * ALT_FLAG_PEND       - Pend on a flag group.
60  * ALT_FLAG_POST       - Set a flag condition.
61 
62  *
63  * Input arguments and return codes are all consistant with the equivalent
64  * uC/OS-II function.
65  *
66  * It's important to be careful in the use of the macros: ALT_FLAG_GRP,
67  * ALT_EXTERN_FLAG_GRP, and ALT_STATIC_FLAG_GRP. In these three cases the
68  * semi-colon is included in the macro definition; so, for example, you should
69  * use:
70  *
71  * ALT_FLAG_GRP(mygroup)
72  *
73  * not:
74  *
75  * ALT_FLAG_GRP(mygroup);
76  *
77  * The inclusion of the semi-colon has been necessary to ensure the macros can
78  * compile with no warnings when used in a single threaded HAL environment.
79  *
80  */
81 
82 #include "priv/alt_no_error.h"
83 
84 #define ALT_FLAG_GRP(group)
85 #define ALT_EXTERN_FLAG_GRP(group)
86 #define ALT_STATIC_FLAG_GRP(group)
87 
88 #define ALT_FLAG_CREATE(group, flags) alt_no_error ()
89 #define ALT_FLAG_PEND(group, flags, wait_type, timeout) alt_no_error ()
90 #define ALT_FLAG_POST(group, flags, opt) alt_no_error ()
91 
92 #ifndef ALT_SINGLE_THREADED
93 #define ALT_SINGLE_THREADED
94 #endif
95 
96 #endif /* __ALT_FLAG_H__ */
97