unity/crnlib/crn_mem.h

// File: crn_mem.h
// See Copyright Notice and license at the end of inc/crnlib.h
#pragma once

#ifndef CRNLIB_MIN_ALLOC_ALIGNMENT
#define CRNLIB_MIN_ALLOC_ALIGNMENT sizeof(size_t) * 2
#endif

namespace crnlib {
#if CRNLIB_64BIT_POINTERS
const uint64 CRNLIB_MAX_POSSIBLE_BLOCK_SIZE = 0x400000000ULL;
#else
const uint32 CRNLIB_MAX_POSSIBLE_BLOCK_SIZE = 0x7FFF0000U;
#endif

void* crnlib_malloc(size_t size);
void* crnlib_malloc(size_t size, size_t* pActual_size);
void* crnlib_realloc(void* p, size_t size, size_t* pActual_size = NULL, bool movable = true);
void* crnlib_calloc(size_t count, size_t size, size_t* pActual_size = NULL);
void crnlib_free(void* p);
size_t crnlib_msize(void* p);
void crnlib_print_mem_stats();
void crnlib_mem_error(const char* p_msg);

// omfg - there must be a better way

template <typename T>
inline T* crnlib_new() {
  T* p = static_cast<T*>(crnlib_malloc(sizeof(T)));
  if (CRNLIB_IS_SCALAR_TYPE(T))
    return p;
  return helpers::construct(p);
}

template <typename T, typename A>
inline T* crnlib_new(const A& init0) {
  T* p = static_cast<T*>(crnlib_malloc(sizeof(T)));
  return new (static_cast<void*>(p)) T(init0);
}

template <typename T, typename A>
inline T* crnlib_new(A& init0) {
  T* p = static_cast<T*>(crnlib_malloc(sizeof(T)));
  return new (static_cast<void*>(p)) T(init0);
}

template <typename T, typename A, typename B>
inline T* crnlib_new(const A& init0, const B& init1) {
  T* p = static_cast<T*>(crnlib_malloc(sizeof(T)));
  return new (static_cast<void*>(p)) T(init0, init1);
}

template <typename T, typename A, typename B, typename C>
inline T* crnlib_new(const A& init0, const B& init1, const C& init2) {
  T* p = static_cast<T*>(crnlib_malloc(sizeof(T)));
  return new (static_cast<void*>(p)) T(init0, init1, init2);
}

template <typename T, typename A, typename B, typename C, typename D>
inline T* crnlib_new(const A& init0, const B& init1, const C& init2, const D& init3) {
  T* p = static_cast<T*>(crnlib_malloc(sizeof(T)));
  return new (static_cast<void*>(p)) T(init0, init1, init2, init3);
}

template <typename T, typename A, typename B, typename C, typename D, typename E>
inline T* crnlib_new(const A& init0, const B& init1, const C& init2, const D& init3, const E& init4) {
  T* p = static_cast<T*>(crnlib_malloc(sizeof(T)));
  return new (static_cast<void*>(p)) T(init0, init1, init2, init3, init4);
}

template <typename T, typename A, typename B, typename C, typename D, typename E, typename F>
inline T* crnlib_new(const A& init0, const B& init1, const C& init2, const D& init3, const E& init4, const F& init5) {
  T* p = static_cast<T*>(crnlib_malloc(sizeof(T)));
  return new (static_cast<void*>(p)) T(init0, init1, init2, init3, init4, init5);
}

template <typename T, typename A, typename B, typename C, typename D, typename E, typename F, typename G>
inline T* crnlib_new(const A& init0, const B& init1, const C& init2, const D& init3, const E& init4, const F& init5, const G& init6) {
  T* p = static_cast<T*>(crnlib_malloc(sizeof(T)));
  return new (static_cast<void*>(p)) T(init0, init1, init2, init3, init4, init5, init6);
}

template <typename T, typename A, typename B, typename C, typename D, typename E, typename F, typename G, typename H>
inline T* crnlib_new(const A& init0, const B& init1, const C& init2, const D& init3, const E& init4, const F& init5, const G& init6, const H& init7) {
  T* p = static_cast<T*>(crnlib_malloc(sizeof(T)));
  return new (static_cast<void*>(p)) T(init0, init1, init2, init3, init4, init5, init6, init7);
}

template <typename T, typename A, typename B, typename C, typename D, typename E, typename F, typename G, typename H, typename I>
inline T* crnlib_new(const A& init0, const B& init1, const C& init2, const D& init3, const E& init4, const F& init5, const G& init6, const H& init7, const I& init8) {
  T* p = static_cast<T*>(crnlib_malloc(sizeof(T)));
  return new (static_cast<void*>(p)) T(init0, init1, init2, init3, init4, init5, init6, init7, init8);
}

template <typename T, typename A, typename B, typename C, typename D, typename E, typename F, typename G, typename H, typename I, typename J>
inline T* crnlib_new(const A& init0, const B& init1, const C& init2, const D& init3, const E& init4, const F& init5, const G& init6, const H& init7, const I& init8, const J& init9) {
  T* p = static_cast<T*>(crnlib_malloc(sizeof(T)));
  return new (static_cast<void*>(p)) T(init0, init1, init2, init3, init4, init5, init6, init7, init8, init9);
}

template <typename T, typename A, typename B, typename C, typename D, typename E, typename F, typename G, typename H, typename I, typename J, typename K>
inline T* crnlib_new(const A& init0, const B& init1, const C& init2, const D& init3, const E& init4, const F& init5, const G& init6, const H& init7, const I& init8, const J& init9, const K& init10) {
  T* p = static_cast<T*>(crnlib_malloc(sizeof(T)));
  return new (static_cast<void*>(p)) T(init0, init1, init2, init3, init4, init5, init6, init7, init8, init9, init10);
}

template <typename T, typename A, typename B, typename C, typename D, typename E, typename F, typename G, typename H, typename I, typename J, typename K, typename L>
inline T* crnlib_new(const A& init0, const B& init1, const C& init2, const D& init3, const E& init4, const F& init5, const G& init6, const H& init7, const I& init8, const J& init9, const K& init10, const L& init11) {
  T* p = static_cast<T*>(crnlib_malloc(sizeof(T)));
  return new (static_cast<void*>(p)) T(init0, init1, init2, init3, init4, init5, init6, init7, init8, init9, init10, init11);
}

template <typename T>
inline T* crnlib_new_array(uint32 num) {
  if (!num)
    num = 1;

  uint64 total = CRNLIB_MIN_ALLOC_ALIGNMENT + sizeof(T) * num;
  if (total > CRNLIB_MAX_POSSIBLE_BLOCK_SIZE) {
    crnlib_mem_error("crnlib_new_array: Array too large!");
    return NULL;
  }
  uint8* q = static_cast<uint8*>(crnlib_malloc(static_cast<size_t>(total)));

  T* p = reinterpret_cast<T*>(q + CRNLIB_MIN_ALLOC_ALIGNMENT);

  reinterpret_cast<uint32*>(p)[-1] = num;
  reinterpret_cast<uint32*>(p)[-2] = ~num;

  if (!CRNLIB_IS_SCALAR_TYPE(T)) {
    helpers::construct_array(p, num);
  }
  return p;
}

template <typename T>
inline void crnlib_delete(T* p) {
  if (p) {
    if (!CRNLIB_IS_SCALAR_TYPE(T)) {
      helpers::destruct(p);
    }
    crnlib_free(p);
  }
}

template <typename T>
inline void crnlib_delete_array(T* p) {
  if (p) {
    const uint32 num = reinterpret_cast<uint32*>(p)[-1];
    const uint32 num_check = reinterpret_cast<uint32*>(p)[-2];
    CRNLIB_ASSERT(num && (num == ~num_check));
    if (num == ~num_check) {
      if (!CRNLIB_IS_SCALAR_TYPE(T)) {
        helpers::destruct_array(p, num);
      }

      crnlib_free(reinterpret_cast<uint8*>(p) - CRNLIB_MIN_ALLOC_ALIGNMENT);
    }
  }
}

}  // namespace crnlib
#define CRNLIB_DEFINE_NEW_DELETE                                \
  void* operator new(size_t size) {                             \
    void* p = crnlib::crnlib_malloc(size);                      \
    if (!p)                                                     \
      crnlib_fail("new: Out of memory!", __FILE__, __LINE__);   \
    return p;                                                   \
  }                                                             \
  void* operator new[](size_t size) {                           \
    void* p = crnlib::crnlib_malloc(size);                      \
    if (!p)                                                     \
      crnlib_fail("new[]: Out of memory!", __FILE__, __LINE__); \
    return p;                                                   \
  }                                                             \
  void operator delete(void* p_block) {                         \
    crnlib::crnlib_free(p_block);                               \
  }                                                             \
  void operator delete[](void* p_block) {                       \
    crnlib::crnlib_free(p_block);                               \
  }