wmi-1.3.16 from opsview.com
This commit is contained in:
Are Casilla
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/*
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Unix SMB/CIFS implementation.
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main select loop and event handling
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wrapper for http://liboop.org/
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Copyright (C) Stefan Metzmacher 2005
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "includes.h"
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#include "lib/events/events.h"
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#include "lib/events/events_internal.h"
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#include <oop.h>
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/*
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!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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NOTE: this code compiles fine, but is completly *UNTESTED*
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and is only commited as example
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!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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*/
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static int oop_event_context_destructor(struct event_context *ev)
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{
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oop_source_sys *oop_sys = ev->additional_data;
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oop_sys_delete(oop_sys);
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return 0;
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}
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/*
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create a oop_event_context structure.
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*/
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static int oop_event_context_init(struct event_context *ev, void *private_data)
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{
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oop_source_sys *oop_sys = private_data;
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if (!oop_sys) {
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oop_sys = oop_sys_new();
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if (!oop_sys) {
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return -1;
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}
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talloc_set_destructor(ev, oop_event_context_destructor);
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}
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ev->additional_data = oop_sys;
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return 0;
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}
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static void *oop_event_fd_handler(oop_source *oop, int fd, oop_event oop_type, void *ptr)
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{
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struct fd_event *fde = ptr;
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if (fd != fde->fd) return OOP_ERROR;
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switch(oop_type) {
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case OOP_READ:
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fde->handler(fde->event_ctx, fde, EVENT_FD_READ, fde->private_data);
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return OOP_CONTINUE;
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case OOP_WRITE:
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fde->handler(fde->event_ctx, fde, EVENT_FD_WRITE, fde->private_data);
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return OOP_CONTINUE;
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case OOP_EXCEPTION:
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return OOP_ERROR;
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case OOP_NUM_EVENTS:
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return OOP_ERROR;
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}
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return OOP_ERROR;
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}
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/*
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destroy an fd_event
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*/
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static int oop_event_fd_destructor(struct fd_event *fde)
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{
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struct event_context *ev = fde->event_ctx;
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oop_source_sys *oop_sys = ev->additional_data;
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oop_source *oop = oop_sys_source(oop_sys);
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if (fde->flags & EVENT_FD_READ)
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oop->cancel_fd(oop, fde->fd, OOP_READ);
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if (fde->flags & EVENT_FD_WRITE)
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oop->cancel_fd(oop, fde->fd, OOP_WRITE);
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return 0;
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}
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/*
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add a fd based event
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return NULL on failure (memory allocation error)
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*/
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static struct fd_event *oop_event_add_fd(struct event_context *ev, TALLOC_CTX *mem_ctx,
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int fd, uint16_t flags,
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event_fd_handler_t handler,
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void *private_data)
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{
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struct fd_event *fde;
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oop_source_sys *oop_sys = ev->additional_data;
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oop_source *oop = oop_sys_source(oop_sys);
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fde = talloc(mem_ctx?mem_ctx:ev, struct fd_event);
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if (!fde) return NULL;
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fde->event_ctx = ev;
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fde->fd = fd;
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fde->flags = flags;
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fde->handler = handler;
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fde->private_data = private_data;
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fde->additional_flags = 0;
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fde->additional_data = NULL;
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if (fde->flags & EVENT_FD_READ)
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oop->on_fd(oop, fde->fd, OOP_READ, oop_event_fd_handler, fde);
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if (fde->flags & EVENT_FD_WRITE)
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oop->on_fd(oop, fde->fd, OOP_WRITE, oop_event_fd_handler, fde);
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talloc_set_destructor(fde, oop_event_fd_destructor);
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return fde;
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}
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/*
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return the fd event flags
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*/
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static uint16_t oop_event_get_fd_flags(struct fd_event *fde)
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{
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return fde->flags;
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}
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/*
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set the fd event flags
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*/
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static void oop_event_set_fd_flags(struct fd_event *fde, uint16_t flags)
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{
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oop_source_sys *oop_sys;
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oop_source *oop;
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oop_sys = fde->event_ctx->additional_data;
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oop = oop_sys_source(oop_sys);
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if ((fde->flags & EVENT_FD_READ)&&(!(flags & EVENT_FD_READ)))
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oop->cancel_fd(oop, fde->fd, OOP_READ);
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if ((!(fde->flags & EVENT_FD_READ))&&(flags & EVENT_FD_READ))
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oop->on_fd(oop, fde->fd, OOP_READ, oop_event_fd_handler, fde);
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if ((fde->flags & EVENT_FD_WRITE)&&(!(flags & EVENT_FD_WRITE)))
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oop->cancel_fd(oop, fde->fd, OOP_WRITE);
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if ((!(fde->flags & EVENT_FD_WRITE))&&(flags & EVENT_FD_WRITE))
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oop->on_fd(oop, fde->fd, OOP_WRITE, oop_event_fd_handler, fde);
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fde->flags = flags;
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}
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static int oop_event_timed_destructor(struct timed_event *te);
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static int oop_event_timed_deny_destructor(struct timed_event *te)
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{
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return -1;
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}
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static void *oop_event_timed_handler(oop_source *oop, struct timeval t, void *ptr)
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{
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struct timed_event *te = ptr;
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/* deny the handler to free the event */
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talloc_set_destructor(te, oop_event_timed_deny_destructor);
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te->handler(te->event_ctx, te, t, te->private_data);
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talloc_set_destructor(te, oop_event_timed_destructor);
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talloc_free(te);
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return OOP_CONTINUE;
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}
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/*
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destroy a timed event
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*/
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static int oop_event_timed_destructor(struct timed_event *te)
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{
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struct event_context *ev = te->event_ctx;
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oop_source_sys *oop_sys = ev->additional_data;
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oop_source *oop = oop_sys_source(oop_sys);
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oop->cancel_time(oop, te->next_event, oop_event_timed_handler, te);
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return 0;
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}
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/*
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add a timed event
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return NULL on failure (memory allocation error)
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*/
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static struct timed_event *oop_event_add_timed(struct event_context *ev, TALLOC_CTX *mem_ctx,
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struct timeval next_event,
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event_timed_handler_t handler,
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void *private_data)
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{
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oop_source_sys *oop_sys = ev->additional_data;
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oop_source *oop = oop_sys_source(oop_sys);
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struct timed_event *te;
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te = talloc(mem_ctx?mem_ctx:ev, struct timed_event);
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if (te == NULL) return NULL;
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te->event_ctx = ev;
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te->next_event = next_event;
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te->handler = handler;
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te->private_data = private_data;
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te->additional_data = NULL;
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oop->on_time(oop, te->next_event, oop_event_timed_handler, te);
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talloc_set_destructor(te, oop_event_timed_destructor);
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return te;
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}
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/*
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do a single event loop using the events defined in ev
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*/
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static int oop_event_loop_once(struct event_context *ev)
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{
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void *oop_ret;
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oop_source_sys *oop_sys = ev->additional_data;
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oop_ret = oop_sys_run_once(oop_sys);
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if (oop_ret == OOP_CONTINUE) {
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return 0;
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}
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return -1;
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}
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/*
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return on failure or (with 0) if all fd events are removed
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*/
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static int oop_event_loop_wait(struct event_context *ev)
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{
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void *oop_ret;
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oop_source_sys *oop_sys = ev->additional_data;
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oop_ret = oop_sys_run(oop_sys);
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if (oop_ret == OOP_CONTINUE) {
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return 0;
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}
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return -1;
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}
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static const struct event_ops event_oop_ops = {
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.context_init = oop_event_context_init,
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.add_fd = oop_event_add_fd,
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.get_fd_flags = oop_event_get_fd_flags,
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.set_fd_flags = oop_event_set_fd_flags,
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.add_timed = oop_event_add_timed,
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.loop_once = oop_event_loop_once,
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.loop_wait = oop_event_loop_wait,
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};
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const struct event_ops *event_liboop_get_ops(void)
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{
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return &event_oop_ops;
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}
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