lib/wsrep-lib
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Initial implementation of client_state TOI mode.

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This commit is contained in:
Teemu Ollakka
2018-06-21 11:45:18 +03:00
parent 3a8861b26b
commit 81ac78913a
6 changed files with 163 additions and 8 deletions
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29
include/wsrep/client_state.hpp
View File

@ -80,6 +80,7 @@ namespace wsrep
m_toi
};
static const int mode_max_ = m_toi + 1;
/**
* Client state enumeration.
*
@ -110,7 +111,7 @@ namespace wsrep
s_quitting
};
const static int state_max_ = s_quitting + 1;
static const int state_max_ = s_quitting + 1;
/**
* Store variables related to global execution context.
@ -398,8 +399,16 @@ namespace wsrep
/**
* Enter total order isolation critical section.
* @param key_array Array of keys
* @param buffer Buffer containing the action to execute inside
* total order isolation section
* @param flags Provider flags for TOI operation
*
* @return Zero on success, non-zero otherwise.
*/
int enter_toi(const wsrep::key_array&, const wsrep::const_buffer&);
int enter_toi(const wsrep::key_array& key_array,
const wsrep::const_buffer& buffer,
int flags);
/**
* Leave total order isolation critical section.
@ -545,6 +554,7 @@ namespace wsrep
, mode_(mode)
, state_(s_none)
, transaction_(*this)
, toi_meta_()
, allow_dirty_reads_()
, debug_log_level_(0)
, current_error_(wsrep::e_success)
@ -561,6 +571,7 @@ namespace wsrep
void debug_log_state(const char*) const;
void state(wsrep::unique_lock<wsrep::mutex>& lock, enum state state);
void mode(wsrep::unique_lock<wsrep::mutex>& lock, enum mode mode);
void override_error(enum wsrep::client_error error);
wsrep::thread::id owning_thread_id_;
@ -572,6 +583,7 @@ namespace wsrep
enum mode mode_;
enum state state_;
wsrep::transaction transaction_;
wsrep::ws_meta toi_meta_;
bool allow_dirty_reads_;
int debug_log_level_;
wsrep::client_error current_error_;
@ -621,11 +633,14 @@ namespace wsrep
: client_(client)
, orig_mode_(client.mode_)
{
client_.mode_ = wsrep::client_state::m_high_priority;
wsrep::unique_lock<wsrep::mutex> lock(client.mutex_);
client.mode(lock, wsrep::client_state::m_high_priority);
}
virtual ~high_priority_context()
{
client_.mode_ = orig_mode_;
wsrep::unique_lock<wsrep::mutex> lock(client_.mutex_);
assert(client_.mode() == wsrep::client_state::m_high_priority);
client_.mode(lock, orig_mode_);
}
private:
wsrep::client_state& client_;
@ -642,12 +657,14 @@ namespace wsrep
: client_(client)
, orig_mode_(client.mode_)
{
client_.mode_ = wsrep::client_state::m_toi;
wsrep::unique_lock<wsrep::mutex> lock(client.mutex_);
client.mode(lock, wsrep::client_state::m_toi);
}
~client_toi_mode()
{
wsrep::unique_lock<wsrep::mutex> lock(client_.mutex_);
assert(client_.mode() == wsrep::client_state::m_toi);
client_.mode_ = orig_mode_;
client_.mode(lock, orig_mode_);
}
private:
wsrep::client_state& client_;

15
include/wsrep/provider.hpp
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@ -277,6 +277,19 @@ namespace wsrep
virtual enum status replay(
const wsrep::ws_handle& ws_handle, void* applier_ctx) = 0;
/**
* Enter total order isolation critical section
*/
virtual enum status enter_toi(wsrep::client_id,
const wsrep::key_array& keys,
const wsrep::const_buffer& buffer,
wsrep::ws_meta& ws_meta,
int flags) = 0;
/**
* Leave total order isolation critical section
*/
virtual enum status leave_toi(wsrep::client_id) = 0;
/**
* Perform a causal read on cluster.
*
@ -284,7 +297,7 @@ namespace wsrep
*
* @return Provider status indicating the result of the call.
*/
virtual enum wsrep::provider::status causal_read(int timeout) const = 0;
virtual enum status causal_read(int timeout) const = 0;
virtual int sst_sent(const wsrep::gtid&, int) = 0;
virtual int sst_received(const wsrep::gtid&, int) = 0;