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fix: add version to make dump & load compatible with previous files

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tingyu
2023-05-30 14:21:39 +08:00
parent 8c8550dcb5
commit 875d5e48e5
1 changed files with 15 additions and 2 deletions
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parallel_hashmap/phmap_dump.h
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+15 -2
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@@ -44,6 +44,8 @@ namespace priv {
#if !defined(PHMAP_NON_DETERMINISTIC) && !defined(PHMAP_DISABLE_DUMP)
static constexpr size_t s_version_base = std::numeric_limits<size_t>::max() - 10;
static constexpr size_t s_version = s_version_base;
// ------------------------------------------------------------------------
// dump/load for raw_hash_set
// ------------------------------------------------------------------------
@@ -53,6 +55,7 @@ bool raw_hash_set<Policy, Hash, Eq, Alloc>::phmap_dump(OutputArchive& ar) const
static_assert(type_traits_internal::IsTriviallyCopyable<value_type>::value,
"value_type should be trivially copyable");
ar.saveBinary(&s_version, sizeof(size_t));
ar.saveBinary(&size_, sizeof(size_t));
ar.saveBinary(&capacity_, sizeof(size_t));
if (size_ == 0)
@@ -69,7 +72,15 @@ bool raw_hash_set<Policy, Hash, Eq, Alloc>::phmap_load(InputArchive& ar) {
static_assert(type_traits_internal::IsTriviallyCopyable<value_type>::value,
"value_type should be trivially copyable");
raw_hash_set<Policy, Hash, Eq, Alloc>().swap(*this); // clear any existing content
ar.loadBinary(&size_, sizeof(size_t));
size_t version = 0;
ar.loadBinary(&version, sizeof(size_t));
if (version < s_version_base) {
// we didn't store the version, version actually contains the size
size_ = version;
} else {
ar.loadBinary(&size_, sizeof(size_t));
}
ar.loadBinary(&capacity_, sizeof(size_t));
if (capacity_) {
@@ -80,7 +91,9 @@ bool raw_hash_set<Policy, Hash, Eq, Alloc>::phmap_load(InputArchive& ar) {
return true;
ar.loadBinary(ctrl_, sizeof(ctrl_t) * (capacity_ + Group::kWidth + 1));
ar.loadBinary(slots_, sizeof(slot_type) * capacity_);
ar.loadBinary(&growth_left(), sizeof(size_t));
if (version == s_version_base) {
ar.loadBinary(&growth_left(), sizeof(size_t));
}
return true;
}