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/*
* libusb event abstraction on POSIX platforms
*
* Copyright © 2020 Chris Dickens <christopher.a.dickens@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef LIBUSB_EVENTS_POSIX_H
#define LIBUSB_EVENTS_POSIX_H
#include <poll.h>
typedef int usbi_os_handle_t;
#define USBI_OS_HANDLE_FORMAT_STRING "fd %d"
#ifdef HAVE_EVENTFD
typedef struct usbi_event {
int eventfd;
} usbi_event_t;
#define USBI_EVENT_OS_HANDLE(e) ((e)->eventfd)
#define USBI_EVENT_POLL_EVENTS POLLIN
#define USBI_INVALID_EVENT { -1 }
#else
typedef struct usbi_event {
int pipefd[2];
#ifdef __EMSCRIPTEN__
_Atomic int has_event;
#endif
} usbi_event_t;
#define USBI_EVENT_OS_HANDLE(e) ((e)->pipefd[0])
#define USBI_EVENT_POLL_EVENTS POLLIN
#define USBI_INVALID_EVENT { { -1, -1 } }
#endif
#ifdef HAVE_TIMERFD
#define HAVE_OS_TIMER 1
typedef struct usbi_timer {
int timerfd;
} usbi_timer_t;
#define USBI_TIMER_OS_HANDLE(t) ((t)->timerfd)
#define USBI_TIMER_POLL_EVENTS POLLIN
static inline int usbi_timer_valid(usbi_timer_t *timer)
{
return timer->timerfd >= 0;
}
#endif
#endif
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