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🐎 thread_local

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This commit is contained in:
EntireTwix 2021-07-08 03:00:57 -07:00
parent 805a7d05b3
commit fd6d085ae5
1 changed files with 20 additions and 24 deletions
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44
src/bank.cpp
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@ -67,20 +67,20 @@ bool Bank::GetChangeState() const noexcept
BankResponse Bank::GetBal(const std::string &name) const noexcept BankResponse Bank::GetBal(const std::string &name) const noexcept
{ {
uint32_t res = 0; static thread_local uint32_t res = 0;
users.if_contains(name, [&res](const User &u) { res = u.balance + 1; }); users.if_contains(name, [](const User &u) { res = u.balance + 1; });
return res ? BankResponse(k200OK, std::to_string(res - 1)) : BankResponse(k404NotFound, "\"User not found\""); return res ? BankResponse(k200OK, std::to_string(res - 1)) : BankResponse(k404NotFound, "\"User not found\"");
} }
BankResponse Bank::GetLogs(const std::string &name) noexcept BankResponse Bank::GetLogs(const std::string &name) noexcept
{ {
BankResponse res;
#if MAX_LOG_SIZE > 0 #if MAX_LOG_SIZE > 0
BankResponse res;
if (!users.modify_if(name, [&res](User &u) { res = BankResponse(k200OK, u.log.GetLog()); })) if (!users.modify_if(name, [&res](User &u) { res = BankResponse(k200OK, u.log.GetLog()); }))
{ {
return BankResponse(k404NotFound, "\"User not found\""); return BankResponse(k404NotFound, "\"User not found\"");
} }
#endif
return res; return res;
#endif
} }
BankResponse Bank::SendFunds(const std::string &a_name, const std::string &b_name, uint32_t amount) noexcept BankResponse Bank::SendFunds(const std::string &a_name, const std::string &b_name, uint32_t amount) noexcept
{ {
@ -102,11 +102,11 @@ BankResponse Bank::SendFunds(const std::string &a_name, const std::string &b_nam
return {k404NotFound, "\"Reciever does not exist\""}; return {k404NotFound, "\"Reciever does not exist\""};
} }
BankResponse state; static thread_local BankResponse state;
std::shared_lock<std::shared_mutex> lock{save_lock}; //about 10% of this function's cost std::shared_lock<std::shared_mutex> lock{save_lock}; //about 10% of this function's cost
#if MAX_LOG_SIZE > 0 #if MAX_LOG_SIZE > 0
Transaction temp(a_name, b_name, amount); static thread_local Transaction temp(a_name, b_name, amount);
if (!users.modify_if(a_name, [&temp, &state, amount](User &a) { if (!users.modify_if(a_name, [amount](User &a) {
#else #else
if (!users.modify_if(a_name, [&state, amount](User &a) { if (!users.modify_if(a_name, [&state, amount](User &a) {
#endif #endif
@ -130,14 +130,13 @@ BankResponse Bank::SendFunds(const std::string &a_name, const std::string &b_nam
if (state.first == k200OK) if (state.first == k200OK)
{ {
#if MAX_LOG_SIZE > 0 #if MAX_LOG_SIZE > 0
users.modify_if(b_name, [&temp, amount](User &b) { users.modify_if(b_name, [amount](User &b) {
b.balance += amount; b.balance += amount;
b.log.AddTrans(std::move(temp)); b.log.AddTrans(std::move(temp));
}); //about 40% of this function's cost }); //about 40% of this function's cost
#else #else
users.modify_if(b_name, [amount](User &b) { b.balance += amount; }); users.modify_if(b_name, [amount](User &b) { b.balance += amount; });
#endif #endif
#if CONSERVATIVE_DISK_SAVE #if CONSERVATIVE_DISK_SAVE
#if MULTI_THREADED #if MULTI_THREADED
save_flag.SetChangesOn(); //about 5% of this function's cost save_flag.SetChangesOn(); //about 5% of this function's cost
@ -150,8 +149,8 @@ BankResponse Bank::SendFunds(const std::string &a_name, const std::string &b_nam
} }
bool Bank::VerifyPassword(const std::string &name, std::string_view &&attempt) const noexcept bool Bank::VerifyPassword(const std::string &name, std::string_view &&attempt) const noexcept
{ {
bool res = false; static thread_local bool res = false;
users.if_contains(name, [&res, &attempt](const User &u) { res = (u.password == xxHashStringGen{}(std::move(attempt))); }); users.if_contains(name, [&attempt](const User &u) { res = (u.password == xxHashStringGen{}(std::move(attempt))); });
return res; return res;
} }
@ -244,10 +243,7 @@ BankResponse Bank::DelUser(const std::string &name) noexcept
std::shared_lock<std::shared_mutex> lock{save_lock}; std::shared_lock<std::shared_mutex> lock{save_lock};
#if RETURN_ON_DEL #if RETURN_ON_DEL
uint32_t bal; uint32_t bal;
if (users.if_contains(name, [this, &bal](const User &u) { if (users.if_contains(name, [this, &bal](const User &u) { bal = u.balance; }) && bal)
bal = u.balance;
}) &&
bal)
{ {
users.modify_if(return_account, [ this, bal ](User & u)) users.modify_if(return_account, [ this, bal ](User & u))
{ {
@ -273,7 +269,7 @@ BankResponse Bank::DelUser(const std::string &name) noexcept
} }
void Bank::Save() void Bank::Save()
{ {
Json::Value temp; static thread_local Json::Value temp;
//loading info into json temp //loading info into json temp
{ {
@ -281,7 +277,7 @@ void Bank::Save()
for (const auto &u : users) for (const auto &u : users)
{ {
//we know it contains this key but we call this func to grab mutex //we know it contains this key but we call this func to grab mutex
users.if_contains(u.first, [&temp, &u](const User &u_val) { temp[u.first] = u_val.Serialize(); }); users.if_contains(u.first, [&u](const User &u_val) { temp[u.first] = u_val.Serialize(); });
} }
} }
if (temp.isNull()) if (temp.isNull())
@ -290,9 +286,9 @@ void Bank::Save()
} }
else else
{ {
std::ofstream user_save(users_location); static thread_local std::ofstream user_save(users_location);
Json::StreamWriterBuilder builder; static thread_local Json::StreamWriterBuilder builder;
const std::unique_ptr<Json::StreamWriter> writer(builder.newStreamWriter()); static thread_local const std::unique_ptr<Json::StreamWriter> writer(builder.newStreamWriter());
writer->write(temp, &user_save); writer->write(temp, &user_save);
user_save.close(); user_save.close();
} }
@ -308,12 +304,12 @@ void Bank::Save()
//NOT THREAD SAFE, BY NO MEANS SHOULD THIS BE CALLED WHILE RECEIEVING REQUESTS //NOT THREAD SAFE, BY NO MEANS SHOULD THIS BE CALLED WHILE RECEIEVING REQUESTS
void Bank::Load() void Bank::Load()
{ {
Json::CharReaderBuilder builder; static thread_local Json::CharReaderBuilder builder;
Json::Value temp; static thread_local Json::Value temp;
std::ifstream user_save(users_location); static thread_local std::ifstream user_save(users_location);
builder["collectComments"] = true; builder["collectComments"] = true;
JSONCPP_STRING errs; static thread_local JSONCPP_STRING errs;
if (!parseFromStream(builder, user_save, &temp, &errs)) if (!parseFromStream(builder, user_save, &temp, &errs))
{ {
std::cerr << errs << '\n'; std::cerr << errs << '\n';