tor-browser

The Tor Browser
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scoped_glib.h (1990B)

      1 /*
      2 *  Copyright 2022 The WebRTC project authors. All Rights Reserved.
      3 *
      4 *  Use of this source code is governed by a BSD-style license
      5 *  that can be found in the LICENSE file in the root of the source
      6 *  tree. An additional intellectual property rights grant can be found
      7 *  in the file PATENTS.  All contributing project authors may
      8 *  be found in the AUTHORS file in the root of the source tree.
      9 */
     10 
     11 #ifndef MODULES_PORTAL_SCOPED_GLIB_H_
     12 #define MODULES_PORTAL_SCOPED_GLIB_H_
     13 
     14 #include <gio/gio.h>
     15 
     16 #include "rtc_base/checks.h"
     17 #include "rtc_base/system/rtc_export.h"
     18 #include "rtc_base/system/rtc_export_template.h"
     19 
     20 namespace webrtc {
     21 
     22 template <class T>
     23 class Scoped {
     24 public:
     25  Scoped() {}
     26  explicit Scoped(T* val) { ptr_ = val; }
     27  ~Scoped() { RTC_DCHECK_NOTREACHED(); }
     28 
     29  T* operator->() const { return ptr_; }
     30 
     31  explicit operator bool() const { return ptr_ != nullptr; }
     32 
     33  bool operator!() const { return ptr_ == nullptr; }
     34 
     35  T* get() const { return ptr_; }
     36 
     37  T** receive() {
     38    RTC_CHECK(!ptr_);
     39    return &ptr_;
     40  }
     41 
     42  Scoped& operator=(T* val) {
     43    RTC_DCHECK(val);
     44    ptr_ = val;
     45    return *this;
     46  }
     47 
     48 protected:
     49  T* ptr_ = nullptr;
     50 };
     51 
     52 template <>
     53 Scoped<GError>::~Scoped();
     54 template <>
     55 Scoped<char>::~Scoped();
     56 template <>
     57 Scoped<GVariant>::~Scoped();
     58 template <>
     59 Scoped<GVariantIter>::~Scoped();
     60 template <>
     61 Scoped<GDBusMessage>::~Scoped();
     62 template <>
     63 Scoped<GUnixFDList>::~Scoped();
     64 
     65 extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT) Scoped<GError>;
     66 extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT) Scoped<char>;
     67 extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT) Scoped<GVariant>;
     68 extern template class RTC_EXPORT_TEMPLATE_DECLARE(
     69    RTC_EXPORT) Scoped<GVariantIter>;
     70 extern template class RTC_EXPORT_TEMPLATE_DECLARE(
     71    RTC_EXPORT) Scoped<GDBusMessage>;
     72 extern template class RTC_EXPORT_TEMPLATE_DECLARE(
     73    RTC_EXPORT) Scoped<GUnixFDList>;
     74 
     75 }  // namespace webrtc
     76 
     77 #endif  // MODULES_PORTAL_SCOPED_GLIB_H_