mirror of
https://github.com/XRPLF/rippled.git
synced 2025-11-19 18:45:52 +00:00
8d1cfaabe7
NuDB is a high performance key/value database optimized for insert-only workloads, with these features: * Low memory footprint * Values are immutable * Value sizes from 1 2^48 bytes (281TB) * All keys are the same size * Performance independent of growth * Optimized for concurrent fetch * Key file can be rebuilt if needed * Inserts are atomic and consistent * Data file may be iterated, index rebuilt. * Key and data files may be on different volumes * Hardened against algorithmic complexity attacks * Header-only, nothing to build or link
134 lines
3.8 KiB
C++
134 lines
3.8 KiB
C++
//------------------------------------------------------------------------------
|
|
/*
|
|
This file is part of Beast: https://github.com/vinniefalco/Beast
|
|
Copyright 2013, Vinnie Falco <vinnie.falco@gmail.com>
|
|
|
|
Permission to use, copy, modify, and/or distribute this software for any
|
|
purpose with or without fee is hereby granted, provided that the above
|
|
copyright notice and this permission notice appear in all copies.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
//==============================================================================
|
|
|
|
#ifndef BEAST_UNITTESTUTILITIES_H_INCLUDED
|
|
#define BEAST_UNITTESTUTILITIES_H_INCLUDED
|
|
|
|
#include <beast/module/core/files/File.h>
|
|
#include <beast/module/core/maths/Random.h>
|
|
|
|
namespace beast {
|
|
namespace UnitTestUtilities {
|
|
|
|
/** Fairly shuffle an array pseudo-randomly.
|
|
*/
|
|
template <class T>
|
|
void repeatableShuffle (int const numberOfItems, T& arrayOfItems, Random& r)
|
|
{
|
|
for (int i = numberOfItems - 1; i > 0; --i)
|
|
{
|
|
int const choice = r.nextInt (i + 1);
|
|
std::swap (arrayOfItems [i], arrayOfItems [choice]);
|
|
}
|
|
}
|
|
|
|
template <class T>
|
|
void repeatableShuffle (int const numberOfItems, T& arrayOfItems, std::int64_t seedValue)
|
|
{
|
|
Random r (seedValue);
|
|
repeatableShuffle (numberOfItems, arrayOfItems, r);
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
|
|
/** A block of memory used for test data.
|
|
*/
|
|
struct Payload
|
|
{
|
|
/** Construct a payload with a buffer of the specified maximum size.
|
|
|
|
@param maximumBytes The size of the buffer, in bytes.
|
|
*/
|
|
explicit Payload (int maxBufferSize)
|
|
: bufferSize (maxBufferSize)
|
|
, data (maxBufferSize)
|
|
{
|
|
}
|
|
|
|
/** Generate a random block of data within a certain size range.
|
|
|
|
@param minimumBytes The smallest number of bytes in the resulting payload.
|
|
@param maximumBytes The largest number of bytes in the resulting payload.
|
|
@param seedValue The value to seed the random number generator with.
|
|
*/
|
|
void repeatableRandomFill (int minimumBytes, int maximumBytes, std::int64_t seedValue) noexcept
|
|
{
|
|
bassert (minimumBytes >=0 && maximumBytes <= bufferSize);
|
|
|
|
Random r (seedValue);
|
|
|
|
bytes = minimumBytes + r.nextInt (1 + maximumBytes - minimumBytes);
|
|
|
|
bassert (bytes >= minimumBytes && bytes <= bufferSize);
|
|
|
|
for (int i = 0; i < bytes; ++i)
|
|
data [i] = static_cast <unsigned char> (r.nextInt ());
|
|
}
|
|
|
|
/** Compare two payloads for equality.
|
|
*/
|
|
bool operator== (Payload const& other) const noexcept
|
|
{
|
|
if (bytes == other.bytes)
|
|
{
|
|
return memcmp (data.getData (), other.data.getData (), bytes) == 0;
|
|
}
|
|
else
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
|
|
public:
|
|
int const bufferSize;
|
|
|
|
int bytes;
|
|
HeapBlock <char> data;
|
|
};
|
|
|
|
class TempDirectory
|
|
{
|
|
public:
|
|
explicit TempDirectory (std::string const& root)
|
|
: directory (File::createTempFile (root))
|
|
{
|
|
}
|
|
|
|
~TempDirectory()
|
|
{
|
|
directory.deleteRecursively();
|
|
}
|
|
|
|
String const& getFullPathName() const
|
|
{
|
|
return directory.getFullPathName();
|
|
}
|
|
|
|
TempDirectory(const TempDirectory&) = delete;
|
|
TempDirectory& operator=(const TempDirectory&) = delete;
|
|
|
|
private:
|
|
File const directory;
|
|
};
|
|
|
|
} // UnitTestUtilities
|
|
} // beast
|
|
|
|
#endif
|