wasCSharpSQLite – Blame information for rev
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1 | office | 1 | using System; |
2 | using System.Diagnostics; |
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3 | |||
4 | namespace Community.CsharpSqlite |
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5 | { |
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6 | public partial class Sqlite3 |
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7 | { |
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8 | /* |
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9 | ** 2008 Jan 22 |
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10 | ** |
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11 | ** The author disclaims copyright to this source code. In place of |
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12 | ** a legal notice, here is a blessing: |
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13 | ** |
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14 | ** May you do good and not evil. |
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15 | ** May you find forgiveness for yourself and forgive others. |
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16 | ** May you share freely, never taking more than you give. |
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17 | ************************************************************************* |
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18 | ** |
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19 | ** This file contains code to support the concept of "benign" |
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20 | ** malloc failures (when the xMalloc() or xRealloc() method of the |
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21 | ** sqlite3_mem_methods structure fails to allocate a block of memory |
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22 | ** and returns 0). |
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23 | ** |
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24 | ** Most malloc failures are non-benign. After they occur, SQLite |
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25 | ** abandons the current operation and returns an error code (usually |
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26 | ** SQLITE_NOMEM) to the user. However, sometimes a fault is not necessarily |
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27 | ** fatal. For example, if a malloc fails while resizing a hash table, this |
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28 | ** is completely recoverable simply by not carrying out the resize. The |
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29 | ** hash table will continue to function normally. So a malloc failure |
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30 | ** during a hash table resize is a benign fault. |
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31 | ************************************************************************* |
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32 | ** Included in SQLite3 port to C#-SQLite; 2008 Noah B Hart |
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33 | ** C#-SQLite is an independent reimplementation of the SQLite software library |
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34 | ** |
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35 | ** SQLITE_SOURCE_ID: 2010-08-23 18:52:01 42537b60566f288167f1b5864a5435986838e3a3 |
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36 | ** |
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37 | ************************************************************************* |
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38 | */ |
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39 | //#include "sqliteInt.h" |
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40 | |||
41 | #if !SQLITE_OMIT_BUILTIN_TEST |
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42 | /* |
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43 | ** Global variables. |
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44 | */ |
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45 | //typedef struct BenignMallocHooks BenignMallocHooks; |
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46 | public struct BenignMallocHooks// |
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47 | { |
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48 | public void_function xBenignBegin;//void (*xBenignBegin)(void); |
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49 | public void_function xBenignEnd; //void (*xBenignEnd)(void); |
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50 | public BenignMallocHooks( void_function xBenignBegin, void_function xBenignEnd ) |
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51 | { |
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52 | this.xBenignBegin = xBenignBegin; |
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53 | this.xBenignEnd = xBenignEnd; |
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54 | } |
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55 | } |
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56 | static BenignMallocHooks sqlite3Hooks = new BenignMallocHooks( null, null ); |
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57 | |||
58 | /* The "wsdHooks" macro will resolve to the appropriate BenignMallocHooks |
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59 | ** structure. If writable static data is unsupported on the target, |
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60 | ** we have to locate the state vector at run-time. In the more common |
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61 | ** case where writable static data is supported, wsdHooks can refer directly |
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62 | ** to the "sqlite3Hooks" state vector declared above. |
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63 | */ |
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64 | #if SQLITE_OMIT_WSD |
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65 | //# define wsdHooksInit \ |
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66 | BenignMallocHooks *x = &GLOBAL(BenignMallocHooks,sqlite3Hooks) |
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67 | //# define wsdHooks x[0] |
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68 | #else |
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69 | //# define wsdHooksInit |
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70 | static void wsdHooksInit() |
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71 | { |
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72 | } |
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73 | //# define wsdHooks sqlite3Hooks |
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74 | static BenignMallocHooks wsdHooks = sqlite3Hooks; |
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75 | #endif |
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76 | |||
77 | |||
78 | |||
79 | /* |
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80 | ** Register hooks to call when sqlite3BeginBenignMalloc() and |
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81 | ** sqlite3EndBenignMalloc() are called, respectively. |
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82 | */ |
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83 | static void sqlite3BenignMallocHooks( |
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84 | void_function xBenignBegin, //void (*xBenignBegin)(void), |
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85 | void_function xBenignEnd //void (*xBenignEnd)(void) |
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86 | ) |
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87 | { |
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88 | wsdHooksInit(); |
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89 | wsdHooks.xBenignBegin = xBenignBegin; |
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90 | wsdHooks.xBenignEnd = xBenignEnd; |
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91 | } |
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92 | |||
93 | /* |
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94 | ** This (sqlite3EndBenignMalloc()) is called by SQLite code to indicate that |
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95 | ** subsequent malloc failures are benign. A call to sqlite3EndBenignMalloc() |
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96 | ** indicates that subsequent malloc failures are non-benign. |
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97 | */ |
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98 | static void sqlite3BeginBenignMalloc() |
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99 | { |
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100 | wsdHooksInit(); |
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101 | if ( wsdHooks.xBenignBegin != null ) |
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102 | { |
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103 | wsdHooks.xBenignBegin(); |
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104 | } |
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105 | } |
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106 | static void sqlite3EndBenignMalloc() |
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107 | { |
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108 | wsdHooksInit(); |
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109 | if ( wsdHooks.xBenignEnd != null ) |
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110 | { |
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111 | wsdHooks.xBenignEnd(); |
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112 | } |
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113 | } |
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114 | #endif //* SQLITE_OMIT_BUILTIN_TEST */ |
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115 | } |
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116 | } |