Mercurial > flash_v2

annotate packages/kernel/current/include/sema2.hxx @ 124:0ec04793409a ecos-sw-2000-09-11

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Merge from eCos master repository on 2000-09-11-03:00:13-BST
author jlarmour
date Mon, 11 Sep 2000 02:42:46 +0000
parents 6ed91473a1cd
children e0c0827131d1
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
1 #ifndef CYGONCE_KERNEL_SEMA2_HXX
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
2 #define CYGONCE_KERNEL_SEMA2_HXX
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
3
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
4 //==========================================================================
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
5 //
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
6 // sema2.hxx
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
7 //
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
8 // Semaphore class declarations
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
9 //
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
10 //==========================================================================
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
11 //####COPYRIGHTBEGIN####
64
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT
jlarmour
parents: 2
diff changeset
12 //
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT
jlarmour
parents: 2
diff changeset
13 // -------------------------------------------
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT
jlarmour
parents: 2
diff changeset
14 // The contents of this file are subject to the Red Hat eCos Public License
66
bf00f99aec69 Merge from eCos master repository on 2000-02-02-19:16:44-GMT
jlarmour
parents: 64
diff changeset
15 // Version 1.1 (the "License"); you may not use this file except in
64
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT
jlarmour
parents: 2
diff changeset
16 // compliance with the License. You may obtain a copy of the License at
66
bf00f99aec69 Merge from eCos master repository on 2000-02-02-19:16:44-GMT
jlarmour
parents: 64
diff changeset
17 // http://www.redhat.com/
64
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT
jlarmour
parents: 2
diff changeset
18 //
66
bf00f99aec69 Merge from eCos master repository on 2000-02-02-19:16:44-GMT
jlarmour
parents: 64
diff changeset
19 // Software distributed under the License is distributed on an "AS IS"
64
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT
jlarmour
parents: 2
diff changeset
20 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT
jlarmour
parents: 2
diff changeset
21 // License for the specific language governing rights and limitations under
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT
jlarmour
parents: 2
diff changeset
22 // the License.
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT
jlarmour
parents: 2
diff changeset
23 //
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT
jlarmour
parents: 2
diff changeset
24 // The Original Code is eCos - Embedded Configurable Operating System,
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT
jlarmour
parents: 2
diff changeset
25 // released September 30, 1998.
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT
jlarmour
parents: 2
diff changeset
26 //
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT
jlarmour
parents: 2
diff changeset
27 // The Initial Developer of the Original Code is Red Hat.
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT
jlarmour
parents: 2
diff changeset
28 // Portions created by Red Hat are
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT
jlarmour
parents: 2
diff changeset
29 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT
jlarmour
parents: 2
diff changeset
30 // All Rights Reserved.
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT
jlarmour
parents: 2
diff changeset
31 // -------------------------------------------
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT
jlarmour
parents: 2
diff changeset
32 //
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
33 //####COPYRIGHTEND####
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
34 //==========================================================================
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
35 //#####DESCRIPTIONBEGIN####
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
36 //
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
37 // Author(s): nickg
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
38 // Contributors: nickg
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
39 // Date: 1997-09-09
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
40 // Purpose: Define Semaphore class interfaces
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
41 // Description: The classes defined here provide the APIs for binary
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
42 // and counting semaphores.
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
43 // Usage: #include <cyg/kernel/sema2.hxx>
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
44 //
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
45 //
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
46 //####DESCRIPTIONEND####
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
47 //
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
48 //==========================================================================
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
49
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
50 #include <cyg/kernel/ktypes.h>
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
51 #include <cyg/infra/cyg_ass.h> // assertion macros
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
52 #include <cyg/kernel/thread.hxx>
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
53
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
54 #if 0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
55 // THERE IS NO BINARY-SEMAPHORE-2
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
56
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
57 // -------------------------------------------------------------------------
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
58 // Binary semaphore. This has only two states: posted and not-posted.
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
59
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
60 class Cyg_Binary_Semaphore2
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
61 {
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
62 cyg_bool state; // The binary semaphore state
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
63
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
64 Cyg_ThreadQueue queue; // Queue of waiting threads
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
65
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
66 public:
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
67
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
68 CYGDBG_DEFINE_CHECK_THIS
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
69
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
70 Cyg_Binary_Semaphore2( // Constructor
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
71 cyg_bool init_state = false // Initial state value
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
72 );
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
73
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
74 ~Cyg_Binary_Semaphore2(); // Destructor
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
75
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
76 cyg_bool wait(); // Wait until state == true
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
77
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
78 cyg_bool trywait(); // Set state false if possible
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
79
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
80 void post(); // Increment count
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
81
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
82 cyg_bool posted(); // Get current state
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
83
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
84 };
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
85 #endif
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
86
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
87 // -------------------------------------------------------------------------
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
88 // Counting semaphore. This implements the usual counter based semaphore.
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
89
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
90 class Cyg_Counting_Semaphore2
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
91 {
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
92 cyg_count32 count; // The semaphore count
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
93
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
94 Cyg_ThreadQueue queue; // Queue of waiting threads
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
95
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
96 public:
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
97
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
98 CYGDBG_DEFINE_CHECK_THIS
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
99
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
100 Cyg_Counting_Semaphore2( // Constructor
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
101 cyg_count32 init_count = 0 // Initial count value
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
102 );
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
103
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
104 ~Cyg_Counting_Semaphore2(); // Destructor
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
105
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
106 cyg_bool wait(); // Wait until decrement
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
107
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
108 #ifdef CYGFUN_KERNEL_THREADS_TIMER
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
109 cyg_bool wait( cyg_tick_count abs_timeout );
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
110 #endif // Wait until decrement or timeout
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
111
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
112 cyg_bool trywait(); // Try to decrement
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
113
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
114 void post(); // Increment count
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
115
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents: 66
diff changeset
116 cyg_count32 peek() const; // Get current count value
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
117
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
118 inline
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
119 cyg_bool waiting() // Is anyone waiting?
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
120 {
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
121 return !queue.empty();
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
122 }
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
123
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
124 };
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
125
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
126 // -------------------------------------------------------------------------
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
127 #endif // ifndef CYGONCE_KERNEL_SEMA2_HXX
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
128 // EOF sema2.hxx