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[block cache] improve exception message

This commit is contained in:
Joe Thornber 2016-06-14 14:27:22 +01:00
parent 07f44e9c77
commit e5f969817e
1 changed files with 5 additions and 2 deletions
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7
block-cache/block_cache.cc
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@ -525,8 +525,11 @@ block_cache::get(block_address index, unsigned flags, validator::ptr v)
block *b = lookup_or_read_block(index, flags, v);
if (b) {
if (b->ref_count_ && flags & (GF_DIRTY | GF_ZERO))
throw std::runtime_error("attempt to write lock block concurrently");
if (b->ref_count_ && (flags & (GF_DIRTY | GF_ZERO))) {
std::ostringstream out;
out << "attempt to write lock block " << index << " concurrently";
throw std::runtime_error(out.str());
}
// FIXME: this gets called even for new blocks
hit(*b);