omallocClass.cc
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1 /****************************************
2 * Computer Algebra System SINGULAR *
3 ****************************************/
4 /*
5 * ABSTRACT: standard version of C++-memory management alloc func
6 */
7 
8 #include <omalloc/omalloc.h>
9 
10 #ifdef __cplusplus
11 
12 #include <new>
13 #include <stdlib.h>
14 #include <omalloc/omallocClass.h>
15 
16 void* omallocClass::operator new[] ( size_t size )
17 #ifndef __GNUC__
18 throw (std::bad_alloc)
19 #endif
20 {
21  void* addr;
22  if (size==(size_t)0) size = (size_t)1;
23  omTypeAlloc(void*, addr, size);
24  return addr;
25 }
26 
27 void omallocClass::operator delete[] ( void* block )
28 #ifndef __GNUC__
29 throw ()
30 #endif
31 {
32  omfree( block );
33 }
34 
35 // The C++ standard has ratified a change to the new operator.
36 //
37 // T *p = new T;
38 //
39 // Previously, if the call to new above failed, a null pointer would've been returned.
40 // Under the ISO C++ Standard, an exception of type std::bad_alloc is thrown.
41 // It is possible to suppress this behaviour in favour of the old style
42 // by using the nothrow version.
43 //
44 // T *p = new (std::nothrow) T;
45 //
46 // So we have to overload this new also, just to be sure.
47 //
48 // A further interesting question is, if you don't have enough resources
49 // to allocate a request for memory,
50 // do you expect to have enough to be able to deal with it?
51 // Most operating systems will have slowed to be unusable
52 // long before the exception gets thrown.
53 
54 void * omallocClass::operator new(size_t size, const std::nothrow_t &) throw()
55 {
56  void* addr;
57  omTypeAlloc(void*, addr, size);
58  return addr;
59 }
60 
61 void * omallocClass::operator new[](size_t size, const std::nothrow_t &) throw()
62 {
63  void* addr;
64  if (size==(size_t)0) size = (size_t)1;
65  omTypeAlloc(void*, addr, size);
66  return addr;
67 }
68 #endif
#define block
Definition: scanner.cc:662
#define omfree(addr)
Definition: omAllocDecl.h:237
int size(const CanonicalForm &f, const Variable &v)
int size ( const CanonicalForm & f, const Variable & v )
Definition: cf_ops.cc:600
#define omTypeAlloc(type, addr, size)
Definition: omAllocDecl.h:208