I'm trying to replace global operator new and delete with my own
versions, but there's a problem with std stream classes. When I new
up an ostringstream, my version of new is used, but when I delete it,
seems the libstdc++ version of delete is being used. Any clues?
Thanks.
Elron
#include <new>
#include <sstream>
#include <cstdio>
void* operator new(std::size_t size)
{
std::printf("my new\n");
if (size == 0)
size = 1;
void* rawMem = std::malloc(size + 16);
if (rawMem == 0)
throw std::bad_alloc();
return rawMem;
}
void* operator new[](std::size_t size)
{
std::printf("my new[]\n");
if (size == 0)
size = 1;
void* rawMem = std::malloc(size + 16);
if (rawMem == 0)
throw std::bad_alloc();
return rawMem;
}
void operator delete(void* ptr) throw()
{
std::printf("my delete\n");
if (ptr)
std::free(ptr);
}
void operator delete(void* ptr, const std::nothrow_t&) throw()
{
std::printf("my delete nothrow\n");
if (ptr)
std::free(ptr);
}
void operator delete[](void* ptr) throw()
{
std::printf("my delete[]\n");
if (ptr)
std::free(ptr);
}
void operator delete[](void* ptr, const std::nothrow_t&) throw()
{
std::printf("my delete[] nothrow\n");
if (ptr)
std::free(ptr);
}
struct foo
{
foo() { std::printf("foo()\n"); }
~foo() { std::printf("~foo()\n"); }
};
int main (int argc, char * const argv[]) {
foo* f = new foo;
delete f;
std::ostringstream* s = new std::ostringstream;
delete s;
return 0;
}
Output:
my new
foo()
~foo()
my delete
my new
Debugger stopped.
Program exited with status value:0.
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