bool Connection::check () {
if (mysql_ping(get())==0) return true;
auto guard=AtExit([&] () { destroy(); });
auto code=mysql_errno(get());
if (
(code==CR_SERVER_GONE_ERROR) ||
// The documentation for mysql_ping
// explicitly says that it doesn't cause
// CR_SERVER_LOST:
//
// http://dev.mysql.com/doc/refman/5.7/en/mysql-ping.html
//
// However, if you manually close all
// this data provider's connections on
// the server, and then watch as this
// function executes in the debugger,
// you'll discover that mysql_ping
// absolutely does cause CR_SERVER_LOST.
(code==CR_SERVER_LOST)
) return false;
Raise();
}
AtomicType Atomic (Args &&... args) {
lock.Acquire();
auto guard=AtExit([&] () { lock.Release(); });
AtomicType retr;
atomic(retr,std::forward<Args>(args)...);
return retr;
}
BOOL WINAPI DllMain(HINSTANCE hinst, DWORD reason, LPVOID ptr)
{
if(reason == DLL_PROCESS_ATTACH)
{
FP_HModule = (HMODULE)hinst;
AtExit(idAtExit);
}
BOOL res = FP_PluginStartup(reason);
if(reason == DLL_PROCESS_DETACH)
{
CallAtExit();
}
return res;
}
ExtFunc void InitRobot(char *robotProg)
{
int to[2], from[2];
int status;
MyEvent event;
signal(SIGPIPE, CatchPipe);
AtExit(CloseRobot);
if (pipe(to) || pipe(from))
die("pipe");
robotProcess = fork();
if (robotProcess < 0)
die("fork");
if (robotProcess == 0) {
dup2(to[0], STDIN_FILENO);
dup2(from[1], STDOUT_FILENO);
close(to[0]);
close(to[1]);
close(from[0]);
close(from[1]);
execl("/bin/sh", "sh", "-c", robotProg, NULL);
die("execl failed");
}
close(to[0]);
close(from[1]);
toRobotFd = to[1];
robotGen.fd = fromRobotFd = from[0];
if (!(toRobot = fdopen(toRobotFd, "w")))
die("fdopen");
if ((status = fcntl(fromRobotFd, F_GETFL, 0)) < 0)
die("fcntl/F_GETFL");
status |= O_NONBLOCK;
if (fcntl(fromRobotFd, F_SETFL, status) < 0)
die("fcntl/F_SETFL");
AddEventGen(&robotGen);
RobotCmd(1, "Version %d\n", ROBOT_VERSION);
if (WaitMyEvent(&event, EM_robot) != E_robot)
fatal("Robot didn't start successfully");
if (1 > sscanf(event.u.robot.data, "Version %d", &robotVersion)
|| robotVersion < 1)
fatal("Invalid Version line from robot");
if (robotVersion > ROBOT_VERSION)
robotVersion = ROBOT_VERSION;
}
ExtFunc void InitNet(void)
{
lostConn = 0;
gotEndConn = 0;
AtExit(CloseNet);
}
