From a93a69380dc6718c49879af628ed69f8e2b70797 Mon Sep 17 00:00:00 2001 From: Simo Sorce Date: Mon, 22 Dec 2008 18:10:47 -0500 Subject: rebase events to tevent and align to upstream --- tevent/tevent_liboop.c | 288 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 288 insertions(+) create mode 100644 tevent/tevent_liboop.c (limited to 'tevent/tevent_liboop.c') diff --git a/tevent/tevent_liboop.c b/tevent/tevent_liboop.c new file mode 100644 index 000000000..339297a3c --- /dev/null +++ b/tevent/tevent_liboop.c @@ -0,0 +1,288 @@ +/* + Unix SMB/CIFS implementation. + main select loop and event handling + wrapper for http://liboop.org/ + + Copyright (C) Stefan Metzmacher 2005 + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program 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 General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . +*/ + +#include "events.h" +#include "events_internal.h" + +#include + +/* + !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! + + NOTE: this code compiles fine, but is completly *UNTESTED* + and is only commited as example + + !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! +*/ + +static int oop_event_context_destructor(struct event_context *ev) +{ + oop_source_sys *oop_sys = ev->additional_data; + + oop_sys_delete(oop_sys); + + return 0; +} + +/* + create a oop_event_context structure. +*/ +static int oop_event_context_init(struct event_context *ev, void *private_data) +{ + oop_source_sys *oop_sys = private_data; + + if (!oop_sys) { + oop_sys = oop_sys_new(); + if (!oop_sys) { + return -1; + } + + talloc_set_destructor(ev, oop_event_context_destructor); + } + + ev->additional_data = oop_sys; + + return 0; +} + +static void *oop_event_fd_handler(oop_source *oop, int fd, oop_event oop_type, void *ptr) +{ + struct fd_event *fde = ptr; + + if (fd != fde->fd) return OOP_ERROR; + + switch(oop_type) { + case OOP_READ: + fde->handler(fde->event_ctx, fde, EVENT_FD_READ, fde->private_data); + return OOP_CONTINUE; + case OOP_WRITE: + fde->handler(fde->event_ctx, fde, EVENT_FD_WRITE, fde->private_data); + return OOP_CONTINUE; + case OOP_EXCEPTION: + return OOP_ERROR; + case OOP_NUM_EVENTS: + return OOP_ERROR; + } + + return OOP_ERROR; +} + +/* + destroy an fd_event +*/ +static int oop_event_fd_destructor(struct fd_event *fde) +{ + struct event_context *ev = fde->event_ctx; + oop_source_sys *oop_sys = ev->additional_data; + oop_source *oop = oop_sys_source(oop_sys); + + if (fde->flags & EVENT_FD_READ) + oop->cancel_fd(oop, fde->fd, OOP_READ); + if (fde->flags & EVENT_FD_WRITE) + oop->cancel_fd(oop, fde->fd, OOP_WRITE); + + if (fde->flags & EVENT_FD_AUTOCLOSE) { + close(fde->fd); + fde->fd = -1; + } + + return 0; +} + +/* + add a fd based event + return NULL on failure (memory allocation error) +*/ +static struct fd_event *oop_event_add_fd(struct event_context *ev, TALLOC_CTX *mem_ctx, + int fd, uint16_t flags, + event_fd_handler_t handler, + void *private_data) +{ + struct fd_event *fde; + oop_source_sys *oop_sys = ev->additional_data; + oop_source *oop = oop_sys_source(oop_sys); + + fde = talloc(mem_ctx?mem_ctx:ev, struct fd_event); + if (!fde) return NULL; + + fde->event_ctx = ev; + fde->fd = fd; + fde->flags = flags; + fde->handler = handler; + fde->private_data = private_data; + fde->additional_flags = 0; + fde->additional_data = NULL; + + if (fde->flags & EVENT_FD_READ) + oop->on_fd(oop, fde->fd, OOP_READ, oop_event_fd_handler, fde); + if (fde->flags & EVENT_FD_WRITE) + oop->on_fd(oop, fde->fd, OOP_WRITE, oop_event_fd_handler, fde); + + talloc_set_destructor(fde, oop_event_fd_destructor); + + return fde; +} + +/* + return the fd event flags +*/ +static uint16_t oop_event_get_fd_flags(struct fd_event *fde) +{ + return fde->flags; +} + +/* + set the fd event flags +*/ +static void oop_event_set_fd_flags(struct fd_event *fde, uint16_t flags) +{ + oop_source_sys *oop_sys; + oop_source *oop; + + oop_sys = fde->event_ctx->additional_data; + oop = oop_sys_source(oop_sys); + + if ((fde->flags & EVENT_FD_READ)&&(!(flags & EVENT_FD_READ))) + oop->cancel_fd(oop, fde->fd, OOP_READ); + + if ((!(fde->flags & EVENT_FD_READ))&&(flags & EVENT_FD_READ)) + oop->on_fd(oop, fde->fd, OOP_READ, oop_event_fd_handler, fde); + + if ((fde->flags & EVENT_FD_WRITE)&&(!(flags & EVENT_FD_WRITE))) + oop->cancel_fd(oop, fde->fd, OOP_WRITE); + + if ((!(fde->flags & EVENT_FD_WRITE))&&(flags & EVENT_FD_WRITE)) + oop->on_fd(oop, fde->fd, OOP_WRITE, oop_event_fd_handler, fde); + + fde->flags = flags; +} + +static int oop_event_timed_destructor(struct timed_event *te); + +static int oop_event_timed_deny_destructor(struct timed_event *te) +{ + return -1; +} + +static void *oop_event_timed_handler(oop_source *oop, struct timeval t, void *ptr) +{ + struct timed_event *te = ptr; + + /* deny the handler to free the event */ + talloc_set_destructor(te, oop_event_timed_deny_destructor); + te->handler(te->event_ctx, te, t, te->private_data); + + talloc_set_destructor(te, oop_event_timed_destructor); + talloc_free(te); + + return OOP_CONTINUE; +} + +/* + destroy a timed event +*/ +static int oop_event_timed_destructor(struct timed_event *te) +{ + struct event_context *ev = te->event_ctx; + oop_source_sys *oop_sys = ev->additional_data; + oop_source *oop = oop_sys_source(oop_sys); + + oop->cancel_time(oop, te->next_event, oop_event_timed_handler, te); + + return 0; +} + +/* + add a timed event + return NULL on failure (memory allocation error) +*/ +static struct timed_event *oop_event_add_timed(struct event_context *ev, TALLOC_CTX *mem_ctx, + struct timeval next_event, + event_timed_handler_t handler, + void *private_data) +{ + oop_source_sys *oop_sys = ev->additional_data; + oop_source *oop = oop_sys_source(oop_sys); + struct timed_event *te; + + te = talloc(mem_ctx?mem_ctx:ev, struct timed_event); + if (te == NULL) return NULL; + + te->event_ctx = ev; + te->next_event = next_event; + te->handler = handler; + te->private_data = private_data; + te->additional_data = NULL; + + oop->on_time(oop, te->next_event, oop_event_timed_handler, te); + + talloc_set_destructor(te, oop_event_timed_destructor); + + return te; +} + +/* + do a single event loop using the events defined in ev +*/ +static int oop_event_loop_once(struct event_context *ev) +{ + void *oop_ret; + oop_source_sys *oop_sys = ev->additional_data; + + oop_ret = oop_sys_run_once(oop_sys); + if (oop_ret == OOP_CONTINUE) { + return 0; + } + + return -1; +} + +/* + return on failure or (with 0) if all fd events are removed +*/ +static int oop_event_loop_wait(struct event_context *ev) +{ + void *oop_ret; + oop_source_sys *oop_sys = ev->additional_data; + + oop_ret = oop_sys_run(oop_sys); + if (oop_ret == OOP_CONTINUE) { + return 0; + } + + return -1; +} + +static const struct event_ops event_oop_ops = { + .context_init = oop_event_context_init, + .add_fd = oop_event_add_fd, + .get_fd_flags = oop_event_get_fd_flags, + .set_fd_flags = oop_event_set_fd_flags, + .add_timed = oop_event_add_timed, + .add_signal = common_event_add_signal, + .loop_once = oop_event_loop_once, + .loop_wait = oop_event_loop_wait, +}; + +const struct event_ops *event_liboop_get_ops(void) +{ + return &event_oop_ops; +} -- cgit