github.com/provpn/mobile@v0.0.0-20210315122651-28c475f89f6c/bind/objc/ref.h (about)

     1  // Copyright 2015 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  #ifndef __GO_REF_HDR__
     6  #define __GO_REF_HDR__
     7  
     8  #include <Foundation/Foundation.h>
     9  
    10  // GoSeqRef is an object tagged with an integer for passing back and
    11  // forth across the language boundary. A GoSeqRef may represent either
    12  // an instance of a Go object, or an Objective-C object passed to Go.
    13  // The explicit allocation of a GoSeqRef is used to pin a Go object
    14  // when it is passed to Objective-C. The Go seq package maintains a
    15  // reference to the Go object in a map keyed by the refnum along with
    16  // a reference count. When the reference count reaches zero, the Go
    17  // seq package will clear the corresponding entry in the map.
    18  @interface GoSeqRef : NSObject {
    19  }
    20  @property(readonly) int32_t refnum;
    21  @property(strong) id obj; // NULL when representing a Go object.
    22  
    23  // new GoSeqRef object to proxy a Go object. The refnum must be
    24  // provided from Go side.
    25  - (instancetype)initWithRefnum:(int32_t)refnum obj:(id)obj;
    26  
    27  - (int32_t)incNum;
    28  
    29  @end
    30  
    31  @protocol goSeqRefInterface
    32  -(GoSeqRef*) _ref;
    33  @end
    34  
    35  #endif