byes-static-allocator's Introduction

static vector allocator based on static linear allocator

Primitive linear allocator. No deallocation. Just for cases when we need container interface for small data without heap allocation. Originally written for vector. Therefore, it contains a wrapper that calculates the size of the linear buffer for the vector. Compatible with c++98/11/14/17/20.

usage

with raw buffer

 void Fill(std::vector<int, byes::memory::BufferAllocator<int> >& to_fill)
 {
   for (int i = 0; i < 60; i++)
   {
     to_fill.push_back(i);
   }
 }

 int main()
 {
   int buffer[64];
   byes::memory::BufferAllocator<int> allocator(buffer, sizeof(buffer));

   std::vector<int, byes::memory::BufferAllocator<int> > values(allocator); 
   values.reserve(60);		// with msvc vector allocates some extra data, so we cannot allocate 64 items

   Fill(values);
   
   ...
 }

allocator containing a static buffer inside

 void Fill(std::vector<int, byes::memory::StaticAllocator<int, 64 * sizeof(int)> >& to_fill)
 {
   for (int i = 0; i < 60; i++)
   {
     to_fill.push_back(i);
   }
 }

 int main()
 {
   std::vector<int, byes::memory::StaticAllocator<int, 64 * sizeof(int)> > values; // with msvc vector allocates some extra data, so we cannot allocate 64 items
   values.reserve(60);

   Fill(values);

   ...
 }

static vector allocator with items count as allocator parameter

 void Fill(std::vector<int, byes::memory::StaticVectorAllocator<int, 64> >& to_fill)
 {
   for (int i = 0; i < 64; i++)
   {
     to_fill.push_back(i);
   }
 }

 int main()
 {
   std::vector<int, byes::memory::StaticVectorAllocator<int, 64> > values;

   Fill(values);

   ...
 }

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