Mercurial > nand-ecoscentric
annotate packages/kernel/current/include/mboxt.hxx @ 3403:8c8767bb9a62 default tip
devs/nand/micron_mt29: Remove defunct references (in comments) to mt29f2g08_oob_ecc.
| author | Ross Younger <wry@ecoscentric.com> |
|---|---|
| date | Sun, 18 Jan 2015 17:59:01 +1300 |
| parents | 74dbf4c3f2e1 |
| children |
| rev | line source |
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| 0 | 1 #ifndef CYGONCE_KERNEL_MBOXT_HXX |
| 2 #define CYGONCE_KERNEL_MBOXT_HXX | |
| 3 | |
| 4 //========================================================================== | |
| 5 // | |
| 2 | 6 // mboxt.hxx |
| 0 | 7 // |
| 2 | 8 // Mboxt (Message Box/Mailbox) class declarations |
| 0 | 9 // |
| 10 //========================================================================== | |
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11 // ####ECOSGPLCOPYRIGHTBEGIN#### |
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12 // ------------------------------------------- |
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13 // This file is part of eCos, the Embedded Configurable Operating System. |
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14 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc. |
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15 // |
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16 // eCos is free software; you can redistribute it and/or modify it under |
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17 // the terms of the GNU General Public License as published by the Free |
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18 // Software Foundation; either version 2 or (at your option) any later |
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19 // version. |
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20 // |
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21 // eCos is distributed in the hope that it will be useful, but WITHOUT |
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22 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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23 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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24 // for more details. |
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25 // |
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26 // You should have received a copy of the GNU General Public License |
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27 // along with eCos; if not, write to the Free Software Foundation, Inc., |
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28 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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29 // |
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30 // As a special exception, if other files instantiate templates or use |
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31 // macros or inline functions from this file, or you compile this file |
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32 // and link it with other works to produce a work based on this file, |
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33 // this file does not by itself cause the resulting work to be covered by |
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34 // the GNU General Public License. However the source code for this file |
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35 // must still be made available in accordance with section (3) of the GNU |
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36 // General Public License v2. |
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37 // |
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38 // This exception does not invalidate any other reasons why a work based |
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39 // on this file might be covered by the GNU General Public License. |
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40 // ------------------------------------------- |
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41 // ####ECOSGPLCOPYRIGHTEND#### |
| 0 | 42 //========================================================================== |
| 43 //#####DESCRIPTIONBEGIN#### | |
| 44 // | |
| 2 | 45 // Author(s): hmt |
| 46 // Contributors: hmt | |
| 47 // Date: 1998-02-10 | |
| 48 // Purpose: Define Mboxt class interfaces | |
| 49 // Description: The classes defined here provide the APIs for mboxtes. | |
| 50 // Usage: #include <cyg/kernel/mboxt.hxx> | |
| 51 // #include <cyg/kernel/mboxt.inl> | |
| 52 // | |
| 0 | 53 // |
| 54 //####DESCRIPTIONEND#### | |
| 55 // | |
| 56 //========================================================================== | |
| 57 | |
| 58 #include <cyg/kernel/ktypes.h> | |
| 59 #include <cyg/infra/cyg_ass.h> // assertion macros | |
| 60 #include <cyg/kernel/thread.hxx> | |
| 61 | |
| 62 // ------------------------------------------------------------------------- | |
| 63 // Message/Mail Box. This template implements a queue of T's. | |
| 64 // Implemented as a template for maximal flexibility; one would hope | |
| 65 // that only one, with T==(void *) and the same number of them, | |
| 66 // is ever used without very good reason. | |
| 67 | |
| 68 // Cyg_Mboxt has a fixed size array of T's; one size fits all. | |
| 69 | |
| 70 template <class T, cyg_count32 QUEUE_SIZE> | |
| 71 class Cyg_Mboxt | |
| 72 { | |
| 73 private: | |
| 74 cyg_count32 base; // index of first used slot | |
| 75 cyg_count32 count; // count of used slots | |
| 76 Cyg_ThreadQueue get_threadq; // Queue of waiting threads | |
| 77 #ifdef CYGMFN_KERNEL_SYNCH_MBOXT_PUT_CAN_WAIT | |
| 78 Cyg_ThreadQueue put_threadq; // Queue of waiting threads | |
| 79 #endif | |
| 80 static const | |
| 2 | 81 cyg_count32 size = QUEUE_SIZE; |
| 82 T itemqueue[ QUEUE_SIZE ]; | |
| 0 | 83 // queue of items |
| 84 // private utility functions | |
| 85 // wake up a thread from some queue | |
| 2 | 86 inline void wakeup_waiter( Cyg_ThreadQueue &q ); |
| 0 | 87 |
| 88 public: | |
| 89 | |
| 90 CYGDBG_DEFINE_CHECK_THIS | |
| 91 | |
| 92 Cyg_Mboxt(); // Constructor | |
| 93 ~Cyg_Mboxt(); // Destructor | |
| 94 | |
| 2 | 95 cyg_bool get( T &ritem ); // get an item; wait if none |
| 0 | 96 #ifdef CYGFUN_KERNEL_THREADS_TIMER |
| 2 | 97 cyg_bool get( T &ritem, cyg_tick_count abs_timeout ); |
| 0 | 98 #endif |
| 2 | 99 cyg_bool tryget( T &ritem ); // just one attempt |
| 0 | 100 |
| 2 | 101 cyg_bool peek_item( T &ritem ); // get next item without |
| 0 | 102 // removing it |
| 103 | |
| 104 #ifdef CYGMFN_KERNEL_SYNCH_MBOXT_PUT_CAN_WAIT | |
| 2 | 105 cyg_bool put( const T item ); // put an item; wait if full |
| 0 | 106 #ifdef CYGFUN_KERNEL_THREADS_TIMER |
| 2 | 107 cyg_bool put( const T item, cyg_tick_count abs_timeout ); |
| 0 | 108 #endif |
| 109 #endif | |
| 2 | 110 cyg_bool tryput( const T item ); // fails if Q full |
| 0 | 111 |
| 112 inline | |
| 113 cyg_count32 peek() // Get current count value | |
| 114 { | |
| 115 return count; | |
| 116 } | |
| 117 | |
| 118 inline | |
| 2 | 119 cyg_bool waiting_to_get() // Any threads waiting? |
| 0 | 120 { |
| 121 return ! get_threadq.empty(); | |
| 122 } | |
| 123 | |
| 124 inline | |
| 2 | 125 cyg_bool waiting_to_put() // Any threads waiting? |
| 0 | 126 { |
| 127 #ifdef CYGMFN_KERNEL_SYNCH_MBOXT_PUT_CAN_WAIT | |
| 128 return ! put_threadq.empty(); | |
| 129 #else | |
| 130 return false; | |
| 131 #endif | |
| 132 } | |
| 133 }; | |
| 134 | |
| 135 // ------------------------------------------------------------------------- | |
| 136 #endif // ifndef CYGONCE_KERNEL_MBOXT_HXX | |
| 137 // EOF mboxt.hxx |
