Sha256: b74f4e90009969d2fb06ce8575c687cc7b424c792528019ba250d4bf4642f331
Contents?: true
Size: 1.14 KB
Versions: 10
Compression:
Stored size: 1.14 KB
Contents
#ifndef _MEMORY_H_
#define _MEMORY_H_
#include <cstdlib>
/**
* Pre-allocate a chunk of memory and allocate them in small pieces.
* Those memory are never freed after allocation. Used for persist
* data like dictionary contents that will never be destroyed unless
* the application exited.
*/
namespace rmmseg
{
const size_t REALLOC_SIZE = 2048; /* 2KB */
extern size_t _pool_size;
extern char *_pool_base;
inline void *pool_alloc(size_t len)
{
void *mem = _pool_base;
if (len <= _pool_size)
{
_pool_size -= len;
_pool_base += len;
return mem;
}
/* NOTE: the remaining memory is simply discard, which WILL
* cause memory leak. However, this function is not for allocating
* large object. Larger pre-alloc chunk size will also reduce the
* impact of this leak. So this is generally not a problem. */
_pool_base = static_cast<char *>(std::malloc(REALLOC_SIZE));
mem = _pool_base;
_pool_base += len;
_pool_size = REALLOC_SIZE - len;
return mem;
}
}
#endif /* _MEMORY_H_ */
Version data entries
10 entries across 10 versions & 4 rubygems