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comparison packages/kernel/current/src/common/timer.cxx @ 0:3111d98ba7b3 ecos-v1_1-release

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Initial commit of eCos version 1.1
author jlarmour
date Tue, 11 May 1999 11:16:07 +0000
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children 443894e2e912
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-1:000000000000 0:3111d98ba7b3
1 //==========================================================================
2 //
3 // common/timer.cxx
4 //
5 // Timer class implementations
6 //
7 //==========================================================================
8 //####COPYRIGHTBEGIN####
9 //
10 // -------------------------------------------
11 // The contents of this file are subject to the Cygnus eCos Public License
12 // Version 1.0 (the "License"); you may not use this file except in
13 // compliance with the License. You may obtain a copy of the License at
14 // http://sourceware.cygnus.com/ecos
15 //
16 // Software distributed under the License is distributed on an "AS IS"
17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
18 // License for the specific language governing rights and limitations under
19 // the License.
20 //
21 // The Original Code is eCos - Embedded Cygnus Operating System, released
22 // September 30, 1998.
23 //
24 // The Initial Developer of the Original Code is Cygnus. Portions created
25 // by Cygnus are Copyright (C) 1998 Cygnus Solutions. All Rights Reserved.
26 // -------------------------------------------
27 //
28 //####COPYRIGHTEND####
29 //==========================================================================
30 //#####DESCRIPTIONBEGIN####
31 //
32 // Author(s): dsm
33 // Contributors: dsm
34 // Date: 1998-06-11
35 // Purpose: Clock class implementation
36 // Description: This file implements the Timer class which is derived from
37 // the Alarm class to support uITRON type functionality
38 //
39 //####DESCRIPTIONEND####
40 //
41 //==========================================================================
42
43 #include <pkgconf/kernel.h>
44
45 #include <cyg/kernel/ktypes.h> // base kernel types
46 #include <cyg/infra/cyg_trac.h> // tracing macros
47 #include <cyg/infra/cyg_ass.h> // assertion macros
48
49 #include <cyg/kernel/clock.hxx>
50 #include <cyg/kernel/timer.hxx>
51
52 #include <cyg/kernel/clock.inl> // Clock inlines
53
54 // -------------------------------------------------------------------------
55
56 Cyg_Timer::Cyg_Timer()
57 {
58 }
59
60 Cyg_Timer::~Cyg_Timer()
61 {
62 CYG_REPORT_FUNCTION();
63
64 disable();
65 counter = NULL;
66 }
67
68 // -------------------------------------------------------------------------
69
70 void
71 Cyg_Timer::initialize(
72 Cyg_Counter *c,
73 cyg_alarm_fn a,
74 CYG_ADDRWORD d,
75 cyg_tick_count t, // absolute time
76 cyg_tick_count i, // 0 => one shot, else repeating
77 cyg_uint32 action // (DISABLE | ENABLE)
78 )
79 {
80 CYG_REPORT_FUNCTION();
81
82 counter = c;
83 alarm = a;
84 data = d;
85 trigger = t;
86 interval = i;
87 enabled = false;
88
89 CYG_ASSERT(0 == (action & ~ENABLE), "unknown action");
90
91 if(action & ENABLE)
92 enable();
93 }
94
95 void
96 Cyg_Timer::activate(cyg_uint32 action) // (DISABLE | ENABLE) [|RESET]
97 {
98 if(!(action & ENABLE))
99 disable();
100
101 if((action & RESET))
102 {
103 cyg_tick_count t;
104 t = counter->current_value();
105 trigger = t + interval;
106 }
107
108 if((action & ENABLE)) {
109 enable();
110 }
111 }
112
113 // -------------------------------------------------------------------------
114 // EOF common/timer.cxx