Sample Code
windows driver samples/ USBView sample application/ C++/ debug.c/
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 | /*++ Copyright (c) 1997-2008 Microsoft Corporation Module Name: DEBUG.C Abstract: This source file contains debug routines. Environment: user mode Revision History: 07-08-97 : created --*/ /***************************************************************************** I N C L U D E S *****************************************************************************/ #include "uvcview.h" #if DBG /***************************************************************************** T Y P E D E F S *****************************************************************************/ typedef struct _ALLOCHEADER { LIST_ENTRY ListEntry; PCHAR File; ULONG Line; } ALLOCHEADER, *PALLOCHEADER; /***************************************************************************** G L O B A L S *****************************************************************************/ LIST_ENTRY AllocListHead = { &AllocListHead, &AllocListHead }; /***************************************************************************** MyAlloc() *****************************************************************************/ _Success_( return != NULL) _Post_writable_byte_size_(dwBytes) HGLOBAL MyAlloc ( _In_ PCHAR File, ULONG Line, DWORD dwBytes ) { PALLOCHEADER header; DWORD dwRequest = dwBytes; if (0 == dwBytes) { return NULL; } dwBytes += sizeof (ALLOCHEADER); // check for integer overflow if (dwBytes > dwRequest) { header = (PALLOCHEADER)GlobalAlloc(GPTR, dwBytes); if (header != NULL) { InsertTailList(&AllocListHead, &header->ListEntry); header->File = File; header->Line = Line; return ( HGLOBAL )(header + 1); } } return NULL; } /***************************************************************************** MyReAlloc() *****************************************************************************/ _Success_( return != NULL) _Post_writable_byte_size_(dwBytes) HGLOBAL MyReAlloc ( HGLOBAL hMem, DWORD dwBytes ) { PALLOCHEADER header; PALLOCHEADER headerNew; if ((NULL == hMem) || (0 == dwBytes)) { return NULL; } header = (PALLOCHEADER)hMem; header--; // Remove the old address from the allocation list // RemoveEntryList(&header->ListEntry); if (dwBytes < (dwBytes + ( DWORD ) sizeof (ALLOCHEADER))) { dwBytes += sizeof (ALLOCHEADER); headerNew = GlobalReAlloc(( HGLOBAL )header, dwBytes, GMEM_MOVEABLE|GMEM_ZEROINIT); if (NULL == headerNew) { // If GlobalReAlloc fails, the original memory is not freed, // and the original handle and pointer are still valid. // Add the old address back to the allocation list. // InsertTailList(&AllocListHead, &header->ListEntry); } else { // Add the new address to the allocation list // InsertTailList(&AllocListHead, &headerNew->ListEntry); return ( HGLOBAL )(headerNew + 1); } } return NULL; } /***************************************************************************** MyFree() *****************************************************************************/ HGLOBAL MyFree ( HGLOBAL hMem ) { PALLOCHEADER header; if (hMem) { header = (PALLOCHEADER)hMem; header--; RemoveEntryList(&header->ListEntry); return GlobalFree(( HGLOBAL )header); } return GlobalFree(hMem); } /***************************************************************************** MyCheckForLeaks() *****************************************************************************/ VOID MyCheckForLeaks ( VOID ) { PALLOCHEADER header; CHAR buf[128]; memset (buf, 0, sizeof (buf)); while (!IsListEmpty(&AllocListHead)) { header = (PALLOCHEADER)RemoveHeadList(&AllocListHead); StringCbPrintf(buf, sizeof (buf), "File: %s, Line: %d\r\n" , header->File, header->Line); OutputDebugString(buf); } } #endif |
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