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//===--------------------- KQueue.cpp ---------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "KQueue.h"
#ifdef LLDB_USE_KQUEUES
#include "lldb/Core/Error.h"
#include "Utility/TimeSpecTimeout.h"
using namespace lldb_private;
int KQueue::GetFD(bool can_create) {
if (!IsValid() && can_create)
m_fd = kqueue();
return m_fd;
}
int KQueue::Close() {
const int fd = m_fd;
if (fd >= 0) {
m_fd = -1;
return close(fd);
}
return 0;
}
int KQueue::WaitForEvents(struct kevent *events, int num_events, Error &error,
uint32_t timeout_usec) {
const int fd_kqueue = GetFD(false);
if (fd_kqueue >= 0) {
TimeSpecTimeout timeout;
const struct timespec *timeout_ptr =
timeout.SetRelativeTimeoutMircoSeconds32(timeout_usec);
int result = ::kevent(fd_kqueue, NULL, 0, events, num_events, timeout_ptr);
if (result == -1)
error.SetErrorToErrno();
else
error.Clear();
return result;
} else {
error.SetErrorString("invalid kqueue fd");
}
return 0;
}
bool KQueue::AddFDEvent(int fd, bool read, bool write, bool vnode) {
const int fd_kqueue = GetFD(true);
if (fd_kqueue >= 0) {
struct kevent event;
event.ident = fd;
event.filter = 0;
if (read)
event.filter |= EVFILT_READ;
if (write)
event.filter |= EVFILT_WRITE;
if (vnode)
event.filter |= EVFILT_VNODE;
event.flags = EV_ADD | EV_CLEAR;
event.fflags = 0;
event.data = 0;
event.udata = NULL;
int err = ::kevent(fd_kqueue, &event, 1, NULL, 0, NULL);
return err == 0;
}
return false;
}
#endif
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