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#ifndef CONNECTION_P_H
#define CONNECTION_P_H
#include <inttypes.h>
#include "connection.h"
#include "term.h"
#include "json_p.h"
namespace RethinkDB {
extern const int debug_net;
struct Query {
Protocol::Query::QueryType type;
uint64_t token;
Datum term;
OptArgs optArgs;
std::string serialize() {
Array query_arr{static_cast<double>(type)};
if (term.is_valid()) query_arr.emplace_back(term);
if (!optArgs.empty())
query_arr.emplace_back(Term(std::move(optArgs)).datum);
std::string query_str = write_datum(query_arr);
if (debug_net > 0) {
fprintf(stderr, "[%" PRIu64 "] >> %s\n", token, query_str.c_str());
}
char header[12];
memcpy(header, &token, 8);
uint32_t size = query_str.size();
memcpy(header + 8, &size, 4);
query_str.insert(0, header, 12);
return query_str;
}
};
// Used internally to convert a raw response type into an enum
Protocol::Response::ResponseType response_type(double t);
Protocol::Response::ErrorType runtime_error_type(double t);
// Contains a response from the server. Use the Cursor class to interact with these responses
class Response {
public:
Response() = delete;
explicit Response(Datum&& datum) :
type(response_type(std::move(datum).extract_field("t").extract_number())),
error_type(datum.get_field("e") ?
runtime_error_type(std::move(datum).extract_field("e").extract_number()) :
Protocol::Response::ErrorType(0)),
result(std::move(datum).extract_field("r").extract_array()) { }
Error as_error();
Protocol::Response::ResponseType type;
Protocol::Response::ErrorType error_type;
Array result;
};
class Token;
class ConnectionPrivate {
public:
ConnectionPrivate(int sockfd)
: guarded_next_token(1), guarded_sockfd(sockfd), guarded_loop_active(false)
{ }
void run_query(Query query, bool no_reply = false);
Response wait_for_response(uint64_t, double);
uint64_t new_token() {
return guarded_next_token++;
}
std::mutex read_lock;
std::mutex write_lock;
std::mutex cache_lock;
struct TokenCache {
bool closed = false;
std::condition_variable cond;
std::queue<Response> responses;
};
std::map<uint64_t, TokenCache> guarded_cache;
uint64_t guarded_next_token;
int guarded_sockfd;
bool guarded_loop_active;
};
class CacheLock {
public:
CacheLock(ConnectionPrivate* conn) : inner_lock(conn->cache_lock) { }
void lock() {
inner_lock.lock();
}
void unlock() {
inner_lock.unlock();
}
std::unique_lock<std::mutex> inner_lock;
};
class ReadLock {
public:
ReadLock(ConnectionPrivate* conn_) : lock(conn_->read_lock), conn(conn_) { }
size_t recv_some(char*, size_t, double wait);
void recv(char*, size_t, double wait);
std::string recv(size_t);
size_t recv_cstring(char*, size_t);
Response read_loop(uint64_t, CacheLock&&, double);
std::lock_guard<std::mutex> lock;
ConnectionPrivate* conn;
};
class WriteLock {
public:
WriteLock(ConnectionPrivate* conn_) : lock(conn_->write_lock), conn(conn_) { }
void send(const char*, size_t);
void send(std::string);
std::lock_guard<std::mutex> lock;
ConnectionPrivate* conn;
};
} // namespace RethinkDB
#endif // CONNECTION_P_H
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