forked from enlightenment/efl
202 lines
4.7 KiB
C
202 lines
4.7 KiB
C
/* EIO - EFL data type library
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* Copyright (C) 2011 Enlightenment Developers:
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* Cedric Bail <cedric.bail@free.fr>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library;
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* if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "eio_private.h"
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#include "Eio.h"
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#include <sys/types.h>
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#include <sys/event.h>
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#include <sys/stat.h>
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/*============================================================================*
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* Local *
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*============================================================================*/
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/**
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* @cond LOCAL
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*/
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#define KEVENT_NUM_EVENTS 5
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struct _Eio_Monitor_Backend
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{
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Eio_Monitor *parent;
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int fd;
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};
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static Ecore_Fd_Handler *_kqueue_fd = NULL;
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static Eina_Hash *_kevent_monitors = NULL;
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static void
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_eio_kevent_del(void *data)
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{
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Eio_Monitor_Backend *emb = data;
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if (emb->fd)
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close(emb->fd);
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free(emb);
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}
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static Eina_Bool
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_eio_kevent_handler(void *data EINA_UNUSED, Ecore_Fd_Handler *fdh)
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{
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Eio_Monitor_Backend *backend;
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struct kevent evs[KEVENT_NUM_EVENTS];
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int event_code = 0;
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int res = kevent(ecore_main_fd_handler_fd_get(fdh), 0, 0, evs, KEVENT_NUM_EVENTS, 0);
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for(int i=0; i<res; ++i)
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{
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backend = eina_hash_find(_kevent_monitors, &evs[i].ident);
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if(evs[i].fflags & NOTE_DELETE)
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{
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event_code = EIO_MONITOR_SELF_DELETED;
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_eio_monitor_send(backend->parent, backend->parent->path, event_code);
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}
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if(evs[i].fflags & NOTE_WRITE || evs[i].fflags & NOTE_ATTRIB)
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{
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event_code = EIO_MONITOR_FILE_MODIFIED;
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_eio_monitor_send(backend->parent, backend->parent->path, event_code);
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}
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}
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return ECORE_CALLBACK_RENEW;
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}
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/**
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* @endcond
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*/
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/*============================================================================*
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* Global *
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*============================================================================*/
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/**
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* @cond LOCAL
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*/
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/**
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* @endcond
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*/
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void eio_monitor_backend_init(void)
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{
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int fd;
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if (_kqueue_fd != NULL) return; // already initialized
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fd = kqueue();
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if (fd < 0) return;
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_kqueue_fd = ecore_main_fd_handler_add(fd, ECORE_FD_READ, _eio_kevent_handler, NULL, NULL, NULL);
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if (!_kqueue_fd)
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{
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close(fd);
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return;
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}
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_kevent_monitors = eina_hash_int32_new(_eio_kevent_del);
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}
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void eio_monitor_backend_shutdown(void)
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{
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int fd;
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if (!_kqueue_fd) return;
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eina_hash_free(_kevent_monitors);
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fd = ecore_main_fd_handler_fd_get(_kqueue_fd);
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ecore_main_fd_handler_del(_kqueue_fd);
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_kqueue_fd = NULL;
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if (fd < 0)
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return;
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close(fd);
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}
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void eio_monitor_backend_add(Eio_Monitor *monitor)
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{
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struct kevent e;
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struct stat st;
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Eio_Monitor_Backend* backend;
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int fd, res = 0;
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if (!_kqueue_fd)
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{
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eio_monitor_fallback_add(monitor);
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return;
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}
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backend = calloc(1, sizeof (Eio_Monitor_Backend));
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if (!backend) return;
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res = stat(monitor->path, &st);
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if (res) goto error;
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fd = open(monitor->path, O_RDONLY);
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if (fd < 0) goto error;
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backend->fd = fd;
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backend->parent = monitor;
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monitor->backend = backend;
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eina_hash_direct_add(_kevent_monitors, &backend->fd, backend);
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EV_SET(&e, fd, EVFILT_VNODE, EV_ADD | EV_CLEAR,
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NOTE_DELETE | NOTE_WRITE | NOTE_ATTRIB, 0, NULL);
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res = kevent(ecore_main_fd_handler_fd_get(_kqueue_fd), &e, 1, 0, 0, 0);
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if (res)
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{
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eina_hash_del(_kevent_monitors, &backend->fd, backend);
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eio_monitor_fallback_add(monitor);
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}
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return;
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error:
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free(backend);
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}
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void eio_monitor_backend_del(Eio_Monitor *monitor)
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{
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Eio_Monitor_Backend *backend;
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if (monitor->fallback)
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{
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eio_monitor_fallback_del(monitor);
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return;
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}
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backend = monitor->backend;
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monitor->backend = NULL;
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eina_hash_del(_kevent_monitors, &backend->fd, backend);
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}
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/*============================================================================*
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* API *
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*============================================================================*/
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