hphp/util/string-holder.cpp

   1 /*
   2    +----------------------------------------------------------------------+
   3    | HipHop for PHP                                                       |
   4    +----------------------------------------------------------------------+
   5    | Copyright (c) 2010-present Facebook, Inc. (http://www.facebook.com)  |
   6    +----------------------------------------------------------------------+
   7    | This source file is subject to version 3.01 of the PHP license,      |
   8    | that is bundled with this package in the file LICENSE, and is        |
   9    | available through the world-wide-web at the following url:           |
  10    | http://www.php.net/license/3_01.txt                                  |
  11    | If you did not receive a copy of the PHP license and are unable to   |
  12    | obtain it through the world-wide-web, please send a note to          |
  13    | license@php.net so we can mail you a copy immediately.               |
  14    +----------------------------------------------------------------------+
  15 */
  16
  17 #include "hphp/util/string-holder.h"
  18
  19 #include "hphp/util/alloc.h"
  20
  21 namespace HPHP {
  22
  23 ///////////////////////////////////////////////////////////////////////////////
  24
  25 void StringHolder::shrinkTo(uint32_t newLen) {
  26   assert(newLen <= m_len);
  27   if (newLen < m_len) {
  28     // We can potentially purge the extra pages, if memory is a concern.
  29     m_len = newLen;
  30   }
  31 }
  32
  33 StringHolder::~StringHolder() {
  34   if (!m_data) return;
  35   if (m_type == FreeType::LocalFree) {
  36     local_free((void*)m_data);
  37   }
  38   if (m_type == FreeType::Free) {
  39     free((void*)m_data);
  40   }
  41 }
  42
  43 StringHolder& StringHolder::operator=(StringHolder&& o) noexcept {
  44   m_type = o.m_type;
  45   m_len = o.m_len;
  46   m_data = o.m_data;
  47   o.m_data = nullptr;
  48   return *this;
  49 }
  50
  51 ///////////////////////////////////////////////////////////////////////////////
  52
  53 }