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#include <sys/types.h>
#ifndef _MSC_VER
#include <unistd.h>
#else
#include <winsock2.h>
#endif
#ifdef _WIN32
#include <io.h>
#endif
#include <fcntl.h>
#include <sys/stat.h>
#include <stdio.h>
#include <errno.h>
#include "Selectable.h"
#include "Threads.h"
#include "Printer.h"
#include "Main.h"
#include "Async.h"
#include "Task.h"
#include "TaskMan.h"
#ifdef _WIN32
inline static SOCKET getSocket(int fd) { return _get_osfhandle(fd); }
#else
inline static int getSocket(int fd) { return fd; }
namespace {
class SigpipeBlocker : public Balau::AtStart {
public:
SigpipeBlocker() : AtStart(5) { }
virtual void doStart() {
struct sigaction new_actn, old_actn;
new_actn.sa_handler = SIG_IGN;
sigemptyset(&new_actn.sa_mask);
new_actn.sa_flags = 0;
sigaction(SIGPIPE, &new_actn, &old_actn);
}
};
static SigpipeBlocker sigpipeBlocker;
};
#endif
void Balau::Selectable::SelectableEvent::gotOwner(Task * task) {
Printer::elog(E_SELECT, "Arming SelectableEvent at %p", this);
if (!m_task) {
Printer::elog(E_SELECT, "...with a new task (%p)", task);
} else if (task == m_task) {
Printer::elog(E_SELECT, "...with the same task, doing nothing.");
return;
} else {
Printer::elog(E_SELECT, "...with a new task (%p -> %p); stopping first", m_task, task);
m_evt.stop();
m_evt.set<SelectableEvent, &SelectableEvent::evt_cb>(this);
m_evt.set(m_fd, m_evtType);
}
m_task = task;
m_evt.set(task->getLoop());
m_evt.start();
}
void Balau::Selectable::setFD(int fd) throw (GeneralException) {
if (m_fd >= 0)
throw GeneralException("FD already set.");
m_fd = fd;
m_evtR = new SelectableEvent(m_fd, ev::READ);
m_evtW = new SelectableEvent(m_fd, ev::WRITE);
#ifdef _WIN32
u_long iMode = 1;
int r = ioctlsocket(_get_osfhandle(m_fd), FIONBIO, &iMode);
EAssert(r == NO_ERROR, "ioctlsocket FIONBIO failed with error %i", r);
#else
fcntl(m_fd, F_SETFL, O_NONBLOCK);
#endif
}
Balau::Selectable::~Selectable() {
m_fd = -1;
delete m_evtR;
delete m_evtW;
m_evtR = m_evtW = NULL;
}
bool Balau::Selectable::isClosed() { return m_fd < 0; }
bool Balau::Selectable::isEOF() { return isClosed(); }
ssize_t Balau::Selectable::read(void * buf, size_t count) throw (GeneralException) {
if (count == 0)
return 0;
AAssert(m_fd >= 0, "You can't call read() on a closed selectable");
int spins = 0;
do {
ssize_t r = recv((int) getSocket(m_fd), (char *) buf, count, 0);
if (r >= 0) {
m_evtR->resetMaybe();
if (r == 0)
close();
return r;
}
#ifndef _WIN32
int err = errno;
#else
int err = WSAGetLastError();
#ifdef _MSC_VER
if (err == WSAEWOULDBLOCK)
#else
if (err == WSAWOULDBLOCK)
#endif
err = EAGAIN;
#endif
if ((err == EAGAIN) || (err == EINTR) || (err == EWOULDBLOCK)) {
Task::operationYield(m_evtR, Task::INTERRUPTIBLE);
} else {
m_evtR->stop();
return r;
}
} while (spins++ < 2);
return -1;
}
ssize_t Balau::Selectable::write(const void * buf, size_t count) throw (GeneralException) {
if (count == 0)
return 0;
AAssert(m_fd >= 0, "You can't call write() on a closed selectable");
int spins = 0;
do {
ssize_t r = send((int) getSocket(m_fd), (const char *) buf, count, 0);
EAssert(r != 0, "send() returned 0 (broken pipe ?)");
if (r > 0) {
m_evtW->resetMaybe();
return r;
}
#ifndef _WIN32
int err = errno;
if (err == EPIPE) {
close();
return 0;
}
#else
int err = WSAGetLastError();
#ifdef _MSC_VER
if (err == WSAEWOULDBLOCK)
#else
if (err == WSAWOULDBLOCK)
#endif
err = EAGAIN;
#endif
if ((err == EAGAIN) || (err == EINTR) || (err == EWOULDBLOCK)) {
Task::operationYield(m_evtW, Task::INTERRUPTIBLE);
} else {
m_evtW->stop();
return r;
}
} while (spins++ < 2);
return -1;
}
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