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fixup! Better handle 32-bit platforms by limitting database size

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Mayeul Cantan 2022-07-20 12:44:07 +02:00
parent 702d7e620f
commit fb2e019591
1 changed files with 5 additions and 4 deletions
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7
src/Cache.cpp
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@ -47,16 +47,17 @@ static const std::string_view CACHE_FORMAT_VERSION_KEY("cache_format_version");
static const std::string_view CURRENT_ONLINE_BACKUP_VERSION("current_online_backup_version");
constexpr auto MAX_DBS = 32384UL;
#if Q_PROCESSOR_WORDSIZE == 8 // 64-bit
constexpr auto BATCH_SIZE = 100;
#if Q_PROCESSOR_WORDSIZE >= 5 // 40-bit or more, up to 2^(8*WORDSIZE) words addressable.
constexpr auto DB_SIZE = 32ULL * 1024ULL * 1024ULL * 1024ULL; // 32 GB
constexpr size_t MAX_RESTORED_MESSAGES = 30'000;
#elif Q_PROCESSOR_WORDSIZE == 4 // 32-bit address space limits mmaps
constexpr auto DB_SIZE = 1ULL * 1024ULL * 1024ULL * 1024ULL; // 1 GB
constexpr size_t MAX_RESTORED_MESSAGES = 5'000;
#else
#error unknown word size on target CPU
#error Not enough virtual address space for the database on target CPU
#endif
constexpr auto BATCH_SIZE = 100;
//! Cache databases and their format.
//!