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Add AIThreadSafeBits::wrapper_cast to cast wrapped object back to wrapper class.

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Aleric Inglewood
2012-05-03 16:29:24 +02:00
parent 3c2f0b551f
commit e7a3a150a7
1 changed files with 8 additions and 0 deletions
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8
indra/llcommon/aithreadsafe.h
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@@ -132,6 +132,14 @@ public:
// Only for use by AITHREADSAFE, see below. // Only for use by AITHREADSAFE, see below.
void* memory() const { return const_cast<long*>(&mMemory[0]); } void* memory() const { return const_cast<long*>(&mMemory[0]); }
// Cast a T* back to AIThreadSafeBits<T>. This is the inverse of memory().
template<typename T2>
static AIThreadSafeBits<T2>* wrapper_cast(T2* ptr)
{ return reinterpret_cast<AIThreadSafeBits<T2>*>(reinterpret_cast<char*>(ptr) - offsetof(AIThreadSafeBits<T2>, mMemory[0])); }
template<typename T2>
static AIThreadSafeBits<T2> const* wrapper_cast(T2 const* ptr)
{ return reinterpret_cast<AIThreadSafeBits<T2> const*>(reinterpret_cast<char const*>(ptr) - offsetof(AIThreadSafeBits<T2>, mMemory[0])); }
protected: protected:
// Accessors. // Accessors.
T const* ptr() const { return reinterpret_cast<T const*>(mMemory); } T const* ptr() const { return reinterpret_cast<T const*>(mMemory); }