Method grow_buffer

lib/asmjit/asmjit/core/codeholder.cpp:446–487

}

Error CodeHolder::grow_buffer(CodeBuffer* cb, size_t n) noexcept {
  // The size of the section must be valid.
  size_t size = cb->size();
  if (ASMJIT_UNLIKELY(n > std::numeric_limits<uintptr_t>::max() - size)) {
    return make_error(Error::kOutOfMemory);
  }

  // We can now check if growing the buffer is really necessary. It's unlikely
  // that this function is called while there is still room for `n` bytes.
  size_t capacity = cb->capacity();
  size_t required = cb->size() + n;

  if (ASMJIT_UNLIKELY(required <= capacity)) {
    return Error::kOk;
  }

  if (cb->is_fixed()) {
    return make_error(Error::kTooLarge);
  }

  size_t kInitialCapacity = 8192u - Globals::kAllocOverhead;
  if (capacity < kInitialCapacity) {
    capacity = kInitialCapacity;
  }
  else {
    capacity += Globals::kAllocOverhead;
  }

  do {
    size_t old = capacity;
    size_t capacity_increase = capacity < Globals::kGrowThreshold ? capacity : Globals::kGrowThreshold;

    capacity += capacity_increase;

    // Overflow.
    if (ASMJIT_UNLIKELY(old > capacity)) {
      return make_error(Error::kOutOfMemory);
    }
  } while (capacity - Globals::kAllocOverhead < required);

  return CodeHolder_reserve_internal(this, cb, capacity - Globals::kAllocOverhead);
}

Error CodeHolder::reserve_buffer(CodeBuffer* cb, size_t n) noexcept {
  size_t capacity = cb->capacity();