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validation: Refactor block file pre-allocation into FlatFileSeq.

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This commit is contained in:
Jim Posen
2019-01-06 11:27:31 -08:00
parent e2d2abb99f
commit 992404b31e
3 changed files with 53 additions and 33 deletions
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27
src/flatfile.cpp
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@@ -7,6 +7,7 @@
#include <flatfile.h>
#include <logging.h>
#include <tinyformat.h>
#include <util/system.h>
FlatFileSeq::FlatFileSeq(fs::path dir, const char* prefix, size_t chunk_size) :
m_dir(std::move(dir)),
@@ -45,3 +46,29 @@ FILE* FlatFileSeq::Open(const CDiskBlockPos& pos, bool fReadOnly)
}
return file;
}
size_t FlatFileSeq::Allocate(const CDiskBlockPos& pos, size_t add_size, bool& out_of_space)
{
out_of_space = false;
unsigned int n_old_chunks = (pos.nPos + m_chunk_size - 1) / m_chunk_size;
unsigned int n_new_chunks = (pos.nPos + add_size + m_chunk_size - 1) / m_chunk_size;
if (n_new_chunks > n_old_chunks) {
size_t old_size = pos.nPos;
size_t new_size = n_new_chunks * m_chunk_size;
size_t inc_size = new_size - old_size;
if (CheckDiskSpace(m_dir, inc_size)) {
FILE *file = Open(pos);
if (file) {
LogPrintf("Pre-allocating up to position 0x%x in %s%05u.dat\n", new_size, m_prefix, pos.nFile);
AllocateFileRange(file, pos.nPos, inc_size);
fclose(file);
return inc_size;
}
} else {
out_of_space = true;
}
}
return 0;
}