1 | /**************************************** |
---|
2 | * Computer Algebra System SINGULAR * |
---|
3 | ****************************************/ |
---|
4 | /* |
---|
5 | * ABSTRACT: standard version of C++-memory management alloc func |
---|
6 | */ |
---|
7 | |
---|
8 | #ifdef __cplusplus |
---|
9 | |
---|
10 | #include <new> |
---|
11 | #include <stdlib.h> |
---|
12 | #include <omalloc/omallocClass.h> |
---|
13 | |
---|
14 | // The C++ standard has ratified a change to the new operator. |
---|
15 | // |
---|
16 | // T *p = new T; |
---|
17 | // |
---|
18 | // Previously, if the call to new above failed, a null pointer would've been returned. |
---|
19 | // Under the ISO C++ Standard, an exception of type std::bad_alloc is thrown. |
---|
20 | // It is possible to suppress this behaviour in favour of the old style |
---|
21 | // by using the nothrow version. |
---|
22 | // |
---|
23 | // T *p = new (std::nothrow) T; |
---|
24 | // |
---|
25 | // So we have to overload this new also, just to be sure. |
---|
26 | // |
---|
27 | // A further interesting question is, if you don't have enough resources |
---|
28 | // to allocate a request for memory, |
---|
29 | // do you expect to have enough to be able to deal with it? |
---|
30 | // Most operating systems will have slowed to be unusable |
---|
31 | // long before the exception gets thrown. |
---|
32 | |
---|
33 | void * omallocClass::operator new(size_t size, const std::nothrow_t &) throw() |
---|
34 | { |
---|
35 | void* addr; |
---|
36 | omTypeAlloc(void*, addr, size); |
---|
37 | return addr; |
---|
38 | } |
---|
39 | |
---|
40 | void * omallocClass::operator new[](size_t size, const std::nothrow_t &) throw() |
---|
41 | { |
---|
42 | void* addr; |
---|
43 | if (size==(size_t)0) size = (size_t)1; |
---|
44 | omTypeAlloc(void*, addr, size); |
---|
45 | return addr; |
---|
46 | } |
---|
47 | #endif |
---|