1 | #ifndef OMALLOCCLASS_H |
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2 | #define OMALLOCCLASS_H |
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3 | |
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4 | /**************************************** |
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5 | * Computer Algebra System SINGULAR * |
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6 | ****************************************/ |
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7 | /* |
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8 | * ABSTRACT: standard version of C++-memory management alloc func |
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9 | */ |
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10 | |
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11 | #ifdef __cplusplus |
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12 | |
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13 | #include <new> |
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14 | #include <stdlib.h> |
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15 | #include <omalloc/omalloc.h> |
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16 | |
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17 | class omallocClass |
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18 | { |
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19 | public: |
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20 | /* We define those, so that our values of |
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21 | OM_TRACK and OM_CHECK are used */ |
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22 | void* operator new ( size_t size ) |
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23 | #ifndef __GNUC__ |
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24 | throw (std::bad_alloc) |
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25 | #endif |
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26 | { |
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27 | void* addr; |
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28 | omTypeAlloc(void*, addr, size); |
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29 | return addr; |
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30 | } |
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31 | |
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32 | void operator delete ( void* block ) |
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33 | #ifndef __GNUC__ |
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34 | throw () |
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35 | #endif |
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36 | { |
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37 | omFree( block ); |
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38 | } |
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39 | |
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40 | |
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41 | void* operator new[] ( size_t size ) |
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42 | #ifndef __GNUC__ |
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43 | throw (std::bad_alloc) |
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44 | #endif |
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45 | { |
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46 | void* addr; |
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47 | if (size==(size_t)0) size = (size_t)1; |
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48 | omTypeAlloc(void*, addr, size); |
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49 | return addr; |
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50 | } |
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51 | |
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52 | void operator delete[] ( void* block ) |
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53 | #ifndef __GNUC__ |
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54 | throw () |
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55 | #endif |
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56 | { |
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57 | omfree( block ); |
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58 | } |
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59 | |
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60 | |
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61 | // The C++ standard has ratified a change to the new operator. |
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62 | // |
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63 | // T *p = new T; |
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64 | // |
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65 | // Previously, if the call to new above failed, a null pointer would've been returned. |
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66 | // Under the ISO C++ Standard, an exception of type std::bad_alloc is thrown. |
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67 | // It is possible to suppress this behaviour in favour of the old style |
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68 | // by using the nothrow version. |
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69 | // |
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70 | // T *p = new (std::nothrow) T; |
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71 | // |
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72 | // So we have to overload this new also, just to be sure. |
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73 | // |
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74 | // A further interesting question is, if you don't have enough resources |
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75 | // to allocate a request for memory, |
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76 | // do you expect to have enough to be able to deal with it? |
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77 | // Most operating systems will have slowed to be unusable |
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78 | // long before the exception gets thrown. |
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79 | |
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80 | void * operator new(size_t size, const std::nothrow_t &) throw(); |
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81 | |
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82 | void * operator new[](size_t size, const std::nothrow_t &) throw(); |
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83 | }; |
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84 | #endif |
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85 | #endif |
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