libcryfs/random/RandomGeneratorThread.cpp

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#include "RandomGeneratorThread.h"
namespace cpputils {
RandomGeneratorThread::RandomGeneratorThread(ThreadsafeRandomDataBuffer *buffer, size_t minSize, size_t maxSize)
: _randomGenerator(), _buffer(buffer), _minSize(minSize), _maxSize(maxSize) {
ASSERT(_maxSize >= _minSize, "Invalid parameters");
}
void RandomGeneratorThread::loopIteration() {
_buffer->waitUntilSizeIsLessThan(_minSize);
size_t neededRandomDataSize = _maxSize - _buffer->size();
ASSERT(_maxSize > _buffer->size(), "This could theoretically fail if another thread refilled the buffer. But we should be the only refilling thread.");
Data randomData = _generateRandomData(neededRandomDataSize);
_buffer->add(std::move(randomData));
}
Data RandomGeneratorThread::_generateRandomData(size_t size) {
Data newRandom(size);
_randomGenerator.GenerateBlock(static_cast<byte*>(newRandom.data()), size);
return newRandom;
}
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}