1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
|
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// * Neither the name of NVIDIA CORPORATION nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Copyright (c) 2008-2018 NVIDIA Corporation. All rights reserved.
// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.
#ifndef PX_PHYSICS_COMMON_REFCOUNTABLE
#define PX_PHYSICS_COMMON_REFCOUNTABLE
#include "foundation/PxAssert.h"
#include "PsAtomic.h"
namespace physx
{
namespace Cm
{
// simple thread-safe reference count
// when the ref count is zero, the object is in an undefined state (pending delete)
class RefCountable
{
//= ATTENTION! =====================================================================================
// Changing the data layout of this class breaks the binary serialization format. See comments for
// PX_BINARY_SERIAL_VERSION. If a modification is required, please adjust the getBinaryMetaData
// function. If the modification is made on a custom branch, please change PX_BINARY_SERIAL_VERSION
// accordingly.
//==================================================================================================
public:
// PX_SERIALIZATION
RefCountable(const PxEMPTY) : mRefCount(1) {}
static void getBinaryMetaData(PxOutputStream& stream);
//~PX_SERIALIZATION
explicit RefCountable(PxU32 initialCount = 1)
: mRefCount(PxI32(initialCount))
{
PX_ASSERT(mRefCount!=0);
}
virtual ~RefCountable() {}
/**
Calls 'delete this;'. It needs to be overloaded for classes also deriving from
PxBase and call 'Cm::deletePxBase(this);' instead.
*/
virtual void onRefCountZero()
{
delete this;
}
void incRefCount()
{
physx::shdfnd::atomicIncrement(&mRefCount);
// value better be greater than 1, or we've created a ref to an undefined object
PX_ASSERT(mRefCount>1);
}
void decRefCount()
{
PX_ASSERT(mRefCount>0);
if(physx::shdfnd::atomicDecrement(&mRefCount) == 0)
onRefCountZero();
}
PX_FORCE_INLINE PxU32 getRefCount() const
{
return PxU32(mRefCount);
}
private:
volatile PxI32 mRefCount;
};
} // namespace Cm
}
#endif
|