cpp-operator-new-glib.cpp

#include <new>
#include <glib.h>
#include <stdlib.h>
//#include <stdio.h>

// C++17 will also require:
// void* operator new  ( std::size_t count, std::align_val_t al);
// void* operator new[]( std::size_t count, std::align_val_t al);
// void operator delete  ( void* ptr, std::align_val_t al );
// void operator delete[]( void* ptr, std::align_val_t al );

static void *
our_allocator (size_t n);

static void
our_deallocator (void *p);

void *
operator new (size_t n) noexcept(false) {
  return our_allocator (n);
}

void *
operator new[] (size_t n) noexcept(false) {
  // printf ("array\n");
  return our_allocator (n);
}

void *
operator new (size_t n, const std::nothrow_t&) noexcept (true) {
  return our_allocator (n);
}

void
operator delete (void *p) noexcept(true) {
  our_deallocator (p);
}

void
operator delete[] (void *p) noexcept(true) {
  // printf ("free array\n");
  our_deallocator (p);
}


static void *
our_allocator (size_t n)
{
  void *p = g_malloc (n);
  // printf ("alloc 0x%zx -> %p\n", n, p);
  return p;
}

static void
our_deallocator (void *p)
{
  // printf ("free %p\n", p);
  g_free (p);
}