1 | /**************************************** |
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2 | * Computer Algebra System SINGULAR * |
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3 | ****************************************/ |
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4 | /* $Id: mmalloc.cc,v 1.7 2008-10-28 09:12:40 Singular Exp $ */ |
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5 | /* |
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6 | * ABSTRACT: standard version of C++-memory management alloc func |
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7 | */ |
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8 | #include <stdlib.h> |
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9 | |
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10 | #include "mod2.h" |
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11 | |
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12 | #include <omalloc.h> |
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13 | #include <new> |
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14 | |
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15 | /* We define those, so that our values of |
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16 | OM_TRACK and OM_CHECK are used */ |
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17 | void* operator new ( size_t size ) |
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18 | { |
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19 | void* addr; |
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20 | if (size==(size_t)0) size = 1; |
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21 | omTypeAlloc(void*, addr, size); |
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22 | return addr; |
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23 | } |
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24 | |
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25 | void operator delete ( void* block ) |
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26 | { |
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27 | omfree( block ); |
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28 | } |
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29 | |
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30 | void* operator new[] ( size_t size ) |
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31 | { |
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32 | void* addr; |
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33 | if (size==(size_t)0) size = (size_t)1; |
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34 | omTypeAlloc(void*, addr, size); |
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35 | return addr; |
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36 | } |
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37 | |
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38 | void operator delete[] ( void* block ) |
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39 | { |
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40 | omfree( block ); |
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41 | } |
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42 | |
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43 | // The C++ standard has ratified a change to the new operator. |
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44 | // |
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45 | // T *p = new T; |
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46 | // |
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47 | // Previously, if the call to new above failed, a null pointer would've been returned. |
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48 | // Under the ISO C++ Standard, an exception of type std::bad_alloc is thrown. |
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49 | // It is possible to suppress this behaviour in favour of the old style |
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50 | // by using the nothrow version. |
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51 | // |
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52 | // T *p = new (std::nothrow) T; |
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53 | // |
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54 | // So we have to overload this new also, just to be sure. |
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55 | // |
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56 | // A further interesting question is, if you don't have enough resources |
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57 | // to allocate a request for memory, |
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58 | // do you expect to have enough to be able to deal with it? |
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59 | // Most operating systems will have slowed to be unusable |
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60 | // long before the exception gets thrown. |
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61 | |
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62 | void * operator new(size_t size, const std::nothrow_t &) throw() |
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63 | { |
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64 | void* addr; |
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65 | if (size==(size_t)0) size = (size_t)1; |
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66 | omTypeAlloc(void*, addr, size); |
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67 | return addr; |
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68 | } |
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69 | |
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70 | void * operator new[](size_t size, const std::nothrow_t &) throw() |
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71 | { |
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72 | void* addr; |
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73 | if (size==(size_t)0) size = (size_t)1; |
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74 | omTypeAlloc(void*, addr, size); |
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75 | return addr; |
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76 | } |
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