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Proper data alignment for allocator and lazy constructor

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This commit is contained in:
Pavel Kirienko
2014-03-28 13:47:21 +04:00
parent c54b3314e4
commit 4886e2194f
2 changed files with 29 additions and 17 deletions
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libuavcan/include/uavcan/dynamic_memory.hpp
+11 -5
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@@ -117,7 +117,13 @@ class PoolAllocator : public IPoolAllocator, Noncopyable
};
Node* free_list_;
uint8_t pool_[PoolSize] __attribute__((aligned(16))); // TODO: compiler-independent alignment
union
{
uint8_t bytes[PoolSize];
long double _aligner1;
long long _aligner2;
Node _aligner3;
} pool_;
// Noncopyable
PoolAllocator(const PoolAllocator&);
@@ -127,9 +133,9 @@ public:
static const int NumBlocks = int(PoolSize / BlockSize);
PoolAllocator()
: free_list_(reinterpret_cast<Node*>(pool_)) // TODO: alignment
: free_list_(reinterpret_cast<Node*>(pool_.bytes))
{
memset(pool_, 0, PoolSize);
memset(pool_.bytes, 0, PoolSize);
for (int i = 0; i < NumBlocks - 1; i++)
{
free_list_[i].next = free_list_ + i + 1;
@@ -165,8 +171,8 @@ public:
bool isInPool(const void* ptr) const
{
return
ptr >= pool_ &&
ptr < (pool_ + PoolSize);
ptr >= pool_.bytes &&
ptr < (pool_.bytes + PoolSize);
}
std::size_t getBlockSize() const { return BlockSize; }