bin
common
config.log
+push.sh
+++ /dev/null
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-V 14
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-*.d
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-15207
-jelmer
-\f
+++ /dev/null
-AC_CHECK_HEADERS(sys/epoll.h)
-AC_CHECK_FUNCS(epoll_create)
+++ /dev/null
-##############################
-# Start SUBSYSTEM LIBEVENTS
-[SUBSYSTEM::LIBEVENTS]
-OBJ_FILES = events.o events_standard.o
-PUBLIC_DEPENDENCIES = LIBTALLOC
-# End SUBSYSTEM LIBEVENTS
-##############################
+++ /dev/null
-/*
- Unix SMB/CIFS implementation.
- main select loop and event handling
- Copyright (C) Andrew Tridgell 2003
-
- 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 2 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, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
-
-/*
- PLEASE READ THIS BEFORE MODIFYING!
-
- This module is a general abstraction for the main select loop and
- event handling. Do not ever put any localised hacks in here, instead
- register one of the possible event types and implement that event
- somewhere else.
-
- There are 2 types of event handling that are handled in this module:
-
- 1) a file descriptor becoming readable or writeable. This is mostly
- used for network sockets, but can be used for any type of file
- descriptor. You may only register one handler for each file
- descriptor/io combination or you will get unpredictable results
- (this means that you can have a handler for read events, and a
- separate handler for write events, but not two handlers that are
- both handling read events)
-
- 2) a timed event. You can register an event that happens at a
- specific time. You can register as many of these as you
- like. They are single shot - add a new timed event in the event
- handler to get another event.
-
- To setup a set of events you first need to create a event_context
- structure using the function event_context_init(); This returns a
- 'struct event_context' that you use in all subsequent calls.
-
- After that you can add/remove events that you are interested in
- using event_add_*() and talloc_free()
-
- Finally, you call event_loop_wait_once() to block waiting for one of the
- events to occor or event_loop_wait() which will loop
- forever.
-
-*/
-
-#include "includes.h"
-#include "lib/events/events.h"
-#include "lib/events/events_internal.h"
-
-/*
- create a event_context structure for a specific implemementation.
- This must be the first events call, and all subsequent calls pass
- this event_context as the first element. Event handlers also
- receive this as their first argument.
-
- This function is for allowing third-party-applications to hook in gluecode
- to their own event loop code, so that they can make async usage of our client libs
-
- NOTE: use event_context_init() inside of samba!
-*/
-struct event_context *event_context_init_ops(TALLOC_CTX *mem_ctx, const struct event_ops *ops, void *private_data)
-{
- struct event_context *ev;
- int ret;
-
- ev = talloc_zero(mem_ctx, struct event_context);
- if (!ev) return NULL;
-
- ev->ops = ops;
-
- ret = ev->ops->context_init(ev, private_data);
- if (ret != 0) {
- talloc_free(ev);
- return NULL;
- }
-
- return ev;
-}
-
-/*
- create a event_context structure. This must be the first events
- call, and all subsequent calls pass this event_context as the first
- element. Event handlers also receive this as their first argument.
-*/
-struct event_context *event_context_init(TALLOC_CTX *mem_ctx)
-{
- const struct event_ops *ops = event_standard_get_ops();
- return event_context_init_ops(mem_ctx, ops, NULL);
-}
-
-/*
- add a fd based event
- return NULL on failure (memory allocation error)
-*/
-struct fd_event *event_add_fd(struct event_context *ev, TALLOC_CTX *mem_ctx,
- int fd, uint16_t flags, event_fd_handler_t handler,
- void *private_data)
-{
- return ev->ops->add_fd(ev, mem_ctx, fd, flags, handler, private_data);
-}
-
-/*
- return the fd event flags
-*/
-uint16_t event_get_fd_flags(struct fd_event *fde)
-{
- if (!fde) return 0;
- return fde->event_ctx->ops->get_fd_flags(fde);
-}
-
-/*
- set the fd event flags
-*/
-void event_set_fd_flags(struct fd_event *fde, uint16_t flags)
-{
- if (!fde) return;
- fde->event_ctx->ops->set_fd_flags(fde, flags);
-}
-
-/*
- add a timed event
- return NULL on failure
-*/
-struct timed_event *event_add_timed(struct event_context *ev, TALLOC_CTX *mem_ctx,
- struct timeval next_event,
- event_timed_handler_t handler,
- void *private_data)
-{
- return ev->ops->add_timed(ev, mem_ctx, next_event, handler, private_data);
-}
-
-/*
- do a single event loop using the events defined in ev
-*/
-_PUBLIC_ int event_loop_once(struct event_context *ev)
-{
- return ev->ops->loop_once(ev);
-}
-
-/*
- return on failure or (with 0) if all fd events are removed
-*/
-int event_loop_wait(struct event_context *ev)
-{
- return ev->ops->loop_wait(ev);
-}
-
-/*
- find an event context that is a parent of the given memory context,
- or create a new event context as a child of the given context if
- none is found
-
- This should be used in preference to event_context_init() in places
- where you would prefer to use the existing event context if possible
- (which is most situations)
-*/
-struct event_context *event_context_find(TALLOC_CTX *mem_ctx)
-{
- struct event_context *ev = talloc_find_parent_bytype(mem_ctx, struct event_context);
- if (ev == NULL) {
- ev = event_context_init(mem_ctx);
- }
- return ev;
-}
+++ /dev/null
-/*
- Unix SMB/CIFS implementation.
-
- generalised event loop handling
-
- Copyright (C) Andrew Tridgell 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 2 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, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
-
-#ifndef __EVENTS_H__
-#define __EVENTS_H__
-
-struct event_context;
-struct event_ops;
-struct fd_event;
-struct timed_event;
-
-/* event handler types */
-typedef void (*event_fd_handler_t)(struct event_context *, struct fd_event *,
- uint16_t , void *);
-typedef void (*event_timed_handler_t)(struct event_context *, struct timed_event *,
- struct timeval , void *);
-
-struct event_context *event_context_init(TALLOC_CTX *mem_ctx);
-struct event_context *event_context_init_ops(TALLOC_CTX *mem_ctx, const struct event_ops *ops, void *private_data);
-
-struct fd_event *event_add_fd(struct event_context *ev, TALLOC_CTX *mem_ctx,
- int fd, uint16_t flags, event_fd_handler_t handler,
- void *private);
-
-struct timed_event *event_add_timed(struct event_context *ev, TALLOC_CTX *mem_ctx,
- struct timeval next_event,
- event_timed_handler_t handler,
- void *private);
-
-int event_loop_once(struct event_context *ev);
-int event_loop_wait(struct event_context *ev);
-
-uint16_t event_get_fd_flags(struct fd_event *fde);
-void event_set_fd_flags(struct fd_event *fde, uint16_t flags);
-
-struct event_context *event_context_find(TALLOC_CTX *mem_ctx);
-
-/* bits for file descriptor event flags */
-#define EVENT_FD_READ 1
-#define EVENT_FD_WRITE 2
-
-#define EVENT_FD_WRITEABLE(fde) \
- event_set_fd_flags(fde, event_get_fd_flags(fde) | EVENT_FD_WRITE)
-#define EVENT_FD_READABLE(fde) \
- event_set_fd_flags(fde, event_get_fd_flags(fde) | EVENT_FD_READ)
-
-#define EVENT_FD_NOT_WRITEABLE(fde) \
- event_set_fd_flags(fde, event_get_fd_flags(fde) & ~EVENT_FD_WRITE)
-#define EVENT_FD_NOT_READABLE(fde) \
- event_set_fd_flags(fde, event_get_fd_flags(fde) & ~EVENT_FD_READ)
-
-#endif /* __EVENTS_H__ */
+++ /dev/null
-/*
- Unix SMB/CIFS implementation.
-
- generalised event loop handling
-
- Internal structs
-
- 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 2 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, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
-
-struct event_ops {
- /* conntext init */
- int (*context_init)(struct event_context *ev, void *private_data);
-
- /* fd_event functions */
- struct fd_event *(*add_fd)(struct event_context *ev,
- TALLOC_CTX *mem_ctx,
- int fd, uint16_t flags,
- event_fd_handler_t handler,
- void *private_data);
- uint16_t (*get_fd_flags)(struct fd_event *fde);
- void (*set_fd_flags)(struct fd_event *fde, uint16_t flags);
-
- /* timed_event functions */
- struct timed_event *(*add_timed)(struct event_context *ev,
- TALLOC_CTX *mem_ctx,
- struct timeval next_event,
- event_timed_handler_t handler,
- void *private_data);
-
- /* loop functions */
- int (*loop_once)(struct event_context *ev);
- int (*loop_wait)(struct event_context *ev);
-};
-
-struct fd_event {
- struct fd_event *prev, *next;
- struct event_context *event_ctx;
- int fd;
- uint16_t flags; /* see EVENT_FD_* flags */
- event_fd_handler_t handler;
- /* this is private for the specific handler */
- void *private_data;
- /* this is private for the events_ops implementation */
- uint16_t additional_flags;
- void *additional_data;
-};
-
-struct timed_event {
- struct timed_event *prev, *next;
- struct event_context *event_ctx;
- struct timeval next_event;
- event_timed_handler_t handler;
- /* this is private for the specific handler */
- void *private_data;
- /* this is private for the events_ops implementation */
- void *additional_data;
-};
-
-struct event_context {
- /* the specific events implementation */
- const struct event_ops *ops;
- /* this is private for the events_ops implementation */
- void *additional_data;
-};
-
-const struct event_ops *event_standard_get_ops(void);
+++ /dev/null
-/*
- 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 2 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, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
-
-#include "includes.h"
-#include "lib/events/events.h"
-#include "lib/events/events_internal.h"
-
-#include <oop.h>
-
-/*
- !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
-
- 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);
-
- 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,
- .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;
-}
+++ /dev/null
-/*
- Unix SMB/CIFS implementation.
- main select loop and event handling
- Copyright (C) Andrew Tridgell 2003-2005
- 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 2 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, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
-
-/*
- This is SAMBA's default event loop code
-
- - we try to use epoll if configure detected support for it
- otherwise we use select()
- - if epoll is broken on the system or the kernel doesn't support it
- at runtime we fallback to select()
-*/
-
-#include "includes.h"
-#include "system/filesys.h"
-#include "system/select.h" /* needed for WITH_EPOLL */
-#include "lib/util/dlinklist.h"
-#include "lib/events/events.h"
-#include "lib/events/events_internal.h"
-
-struct std_event_context {
- /* a pointer back to the generic event_context */
- struct event_context *ev;
-
- /* list of filedescriptor events */
- struct fd_event *fd_events;
-
- /* list of timed events */
- struct timed_event *timed_events;
-
- /* the maximum file descriptor number in fd_events */
- int maxfd;
-
- /* information for exiting from the event loop */
- int exit_code;
-
- /* this is changed by the destructors for the fd event
- type. It is used to detect event destruction by event
- handlers, which means the code that is calling the event
- handler needs to assume that the linked list is no longer
- valid
- */
- uint32_t destruction_count;
-
- /* when using epoll this is the handle from epoll_create */
- int epoll_fd;
-};
-
-static void std_event_loop_timer(struct std_event_context *std_ev);
-
-/* use epoll if it is available */
-#if WITH_EPOLL
-/*
- called when a epoll call fails, and we should fallback
- to using select
-*/
-static void epoll_fallback_to_select(struct std_event_context *std_ev, const char *reason)
-{
- DEBUG(0,("%s (%s) - falling back to select()\n", reason, strerror(errno)));
- close(std_ev->epoll_fd);
- std_ev->epoll_fd = -1;
- talloc_set_destructor(std_ev, NULL);
-}
-
-/*
- map from EVENT_FD_* to EPOLLIN/EPOLLOUT
-*/
-static uint32_t epoll_map_flags(uint16_t flags)
-{
- uint32_t ret = 0;
- if (flags & EVENT_FD_READ) ret |= (EPOLLIN | EPOLLERR | EPOLLHUP);
- if (flags & EVENT_FD_WRITE) ret |= (EPOLLOUT | EPOLLERR | EPOLLHUP);
- return ret;
-}
-
-/*
- free the epoll fd
-*/
-static int epoll_ctx_destructor(struct std_event_context *std_ev)
-{
- close(std_ev->epoll_fd);
- std_ev->epoll_fd = -1;
- return 0;
-}
-
-/*
- init the epoll fd
-*/
-static void epoll_init_ctx(struct std_event_context *std_ev, BOOL try_epoll)
-{
- if (!try_epoll) return;
- std_ev->epoll_fd = epoll_create(64);
- talloc_set_destructor(std_ev, epoll_ctx_destructor);
-}
-
-#define EPOLL_ADDITIONAL_FD_FLAG_HAS_EVENT (1<<0)
-#define EPOLL_ADDITIONAL_FD_FLAG_REPORT_ERROR (1<<1)
-#define EPOLL_ADDITIONAL_FD_FLAG_GOT_ERROR (1<<2)
-
-/*
- add the epoll event to the given fd_event
-*/
-static void epoll_add_event(struct std_event_context *std_ev, struct fd_event *fde)
-{
- struct epoll_event event;
- if (std_ev->epoll_fd == -1) return;
-
- fde->additional_flags &= ~EPOLL_ADDITIONAL_FD_FLAG_REPORT_ERROR;
-
- /* if we don't want events yet, don't add an epoll_event */
- if (fde->flags == 0) return;
-
- ZERO_STRUCT(event);
- event.events = epoll_map_flags(fde->flags);
- event.data.ptr = fde;
- if (epoll_ctl(std_ev->epoll_fd, EPOLL_CTL_ADD, fde->fd, &event) != 0) {
- epoll_fallback_to_select(std_ev, "EPOLL_CTL_ADD failed");
- }
- fde->additional_flags |= EPOLL_ADDITIONAL_FD_FLAG_HAS_EVENT;
-
- /* only if we want to read we want to tell the event handler about errors */
- if (fde->flags & EVENT_FD_READ) {
- fde->additional_flags |= EPOLL_ADDITIONAL_FD_FLAG_REPORT_ERROR;
- }
-}
-
-/*
- delete the epoll event for given fd_event
-*/
-static void epoll_del_event(struct std_event_context *std_ev, struct fd_event *fde)
-{
- struct epoll_event event;
- if (std_ev->epoll_fd == -1) return;
-
- fde->additional_flags &= ~EPOLL_ADDITIONAL_FD_FLAG_REPORT_ERROR;
-
- /* if there's no epoll_event, we don't need to delete it */
- if (!(fde->additional_flags & EPOLL_ADDITIONAL_FD_FLAG_HAS_EVENT)) return;
-
- ZERO_STRUCT(event);
- event.events = epoll_map_flags(fde->flags);
- event.data.ptr = fde;
- epoll_ctl(std_ev->epoll_fd, EPOLL_CTL_DEL, fde->fd, &event);
- fde->additional_flags &= ~EPOLL_ADDITIONAL_FD_FLAG_HAS_EVENT;
-}
-
-/*
- change the epoll event to the given fd_event
-*/
-static void epoll_mod_event(struct std_event_context *std_ev, struct fd_event *fde)
-{
- struct epoll_event event;
- if (std_ev->epoll_fd == -1) return;
-
- fde->additional_flags &= ~EPOLL_ADDITIONAL_FD_FLAG_REPORT_ERROR;
-
- ZERO_STRUCT(event);
- event.events = epoll_map_flags(fde->flags);
- event.data.ptr = fde;
- if (epoll_ctl(std_ev->epoll_fd, EPOLL_CTL_MOD, fde->fd, &event) != 0) {
- epoll_fallback_to_select(std_ev, "EPOLL_CTL_MOD failed");
- }
-
- /* only if we want to read we want to tell the event handler about errors */
- if (fde->flags & EVENT_FD_READ) {
- fde->additional_flags |= EPOLL_ADDITIONAL_FD_FLAG_REPORT_ERROR;
- }
-}
-
-static void epoll_change_event(struct std_event_context *std_ev, struct fd_event *fde)
-{
- BOOL got_error = (fde->additional_flags & EPOLL_ADDITIONAL_FD_FLAG_GOT_ERROR);
- BOOL want_read = (fde->flags & EVENT_FD_READ);
- BOOL want_write= (fde->flags & EVENT_FD_WRITE);
-
- if (std_ev->epoll_fd == -1) return;
-
- fde->additional_flags &= ~EPOLL_ADDITIONAL_FD_FLAG_REPORT_ERROR;
-
- /* there's already an event */
- if (fde->additional_flags & EPOLL_ADDITIONAL_FD_FLAG_HAS_EVENT) {
- if (want_read || (want_write && !got_error)) {
- epoll_mod_event(std_ev, fde);
- return;
- }
- /*
- * if we want to match the select behavior, we need to remove the epoll_event
- * when the caller isn't interested in events.
- *
- * this is because epoll reports EPOLLERR and EPOLLHUP, even without asking for them
- */
- epoll_del_event(std_ev, fde);
- return;
- }
-
- /* there's no epoll_event attached to the fde */
- if (want_read || (want_write && !got_error)) {
- epoll_add_event(std_ev, fde);
- return;
- }
-}
-
-/*
- event loop handling using epoll
-*/
-static int epoll_event_loop(struct std_event_context *std_ev, struct timeval *tvalp)
-{
- int ret, i;
-#define MAXEVENTS 8
- struct epoll_event events[MAXEVENTS];
- uint32_t destruction_count = std_ev->destruction_count;
- int timeout = -1;
-
- if (std_ev->epoll_fd == -1) return -1;
-
- if (tvalp) {
- /* it's better to trigger timed events a bit later than to early */
- timeout = ((tvalp->tv_usec+999) / 1000) + (tvalp->tv_sec*1000);
- }
-
- ret = epoll_wait(std_ev->epoll_fd, events, MAXEVENTS, timeout);
-
- if (ret == -1 && errno != EINTR) {
- epoll_fallback_to_select(std_ev, "epoll_wait() failed");
- return -1;
- }
-
- if (ret == 0 && tvalp) {
- std_event_loop_timer(std_ev);
- return 0;
- }
-
- for (i=0;i<ret;i++) {
- struct fd_event *fde = talloc_get_type(events[i].data.ptr,
- struct fd_event);
- uint16_t flags = 0;
-
- if (fde == NULL) {
- epoll_fallback_to_select(std_ev, "epoll_wait() gave bad data");
- return -1;
- }
- if (events[i].events & (EPOLLHUP|EPOLLERR)) {
- fde->additional_flags |= EPOLL_ADDITIONAL_FD_FLAG_GOT_ERROR;
- /*
- * if we only wait for EVENT_FD_WRITE, we should not tell the
- * event handler about it, and remove the epoll_event,
- * as we only report errors when waiting for read events,
- * to match the select() behavior
- */
- if (!(fde->additional_flags & EPOLL_ADDITIONAL_FD_FLAG_REPORT_ERROR)) {
- epoll_del_event(std_ev, fde);
- continue;
- }
- flags |= EVENT_FD_READ;
- }
- if (events[i].events & EPOLLIN) flags |= EVENT_FD_READ;
- if (events[i].events & EPOLLOUT) flags |= EVENT_FD_WRITE;
- if (flags) {
- fde->handler(std_ev->ev, fde, flags, fde->private_data);
- if (destruction_count != std_ev->destruction_count) {
- break;
- }
- }
- }
-
- return 0;
-}
-#else
-#define epoll_init_ctx(std_ev,try_epoll) if (try_epoll) {/* fix unused variable warning*/}
-#define epoll_add_event(std_ev,fde)
-#define epoll_del_event(std_ev,fde)
-#define epoll_change_event(std_ev,fde)
-#define epoll_event_loop(std_ev,tvalp) (-1)
-#endif
-
-/*
- create a std_event_context structure.
-*/
-static int std_event_context_init(struct event_context *ev, void *private_data)
-{
- struct std_event_context *std_ev;
- BOOL *_try_epoll = private_data;
- BOOL try_epoll = (_try_epoll == NULL ? True : *_try_epoll);
-
- std_ev = talloc_zero(ev, struct std_event_context);
- if (!std_ev) return -1;
- std_ev->ev = ev;
- std_ev->epoll_fd = -1;
-
- epoll_init_ctx(std_ev, try_epoll);
-
- ev->additional_data = std_ev;
- return 0;
-}
-
-/*
- recalculate the maxfd
-*/
-static void calc_maxfd(struct std_event_context *std_ev)
-{
- struct fd_event *fde;
-
- std_ev->maxfd = 0;
- for (fde = std_ev->fd_events; fde; fde = fde->next) {
- if (fde->fd > std_ev->maxfd) {
- std_ev->maxfd = fde->fd;
- }
- }
-}
-
-
-/* to mark the ev->maxfd invalid
- * this means we need to recalculate it
- */
-#define EVENT_INVALID_MAXFD (-1)
-
-/*
- destroy an fd_event
-*/
-static int std_event_fd_destructor(struct fd_event *fde)
-{
- struct event_context *ev = fde->event_ctx;
- struct std_event_context *std_ev = talloc_get_type(ev->additional_data,
- struct std_event_context);
-
- if (std_ev->maxfd == fde->fd) {
- std_ev->maxfd = EVENT_INVALID_MAXFD;
- }
-
- DLIST_REMOVE(std_ev->fd_events, fde);
- std_ev->destruction_count++;
-
- epoll_del_event(std_ev, fde);
-
- return 0;
-}
-
-/*
- add a fd based event
- return NULL on failure (memory allocation error)
-*/
-static struct fd_event *std_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 std_event_context *std_ev = talloc_get_type(ev->additional_data,
- struct std_event_context);
- struct fd_event *fde;
-
- 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;
-
- DLIST_ADD(std_ev->fd_events, fde);
- if (fde->fd > std_ev->maxfd) {
- std_ev->maxfd = fde->fd;
- }
- talloc_set_destructor(fde, std_event_fd_destructor);
-
- epoll_add_event(std_ev, fde);
-
- return fde;
-}
-
-
-/*
- return the fd event flags
-*/
-static uint16_t std_event_get_fd_flags(struct fd_event *fde)
-{
- return fde->flags;
-}
-
-/*
- set the fd event flags
-*/
-static void std_event_set_fd_flags(struct fd_event *fde, uint16_t flags)
-{
- struct event_context *ev;
- struct std_event_context *std_ev;
-
- if (fde->flags == flags) return;
-
- ev = fde->event_ctx;
- std_ev = talloc_get_type(ev->additional_data, struct std_event_context);
-
- fde->flags = flags;
-
- epoll_change_event(std_ev, fde);
-}
-
-/*
- destroy a timed event
-*/
-static int std_event_timed_destructor(struct timed_event *te)
-{
- struct std_event_context *std_ev = talloc_get_type(te->event_ctx->additional_data,
- struct std_event_context);
- DLIST_REMOVE(std_ev->timed_events, te);
- return 0;
-}
-
-static int std_event_timed_deny_destructor(struct timed_event *te)
-{
- return -1;
-}
-
-/*
- add a timed event
- return NULL on failure (memory allocation error)
-*/
-static struct timed_event *std_event_add_timed(struct event_context *ev, TALLOC_CTX *mem_ctx,
- struct timeval next_event,
- event_timed_handler_t handler,
- void *private_data)
-{
- struct std_event_context *std_ev = talloc_get_type(ev->additional_data,
- struct std_event_context);
- struct timed_event *te, *last_te, *cur_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;
-
- /* keep the list ordered */
- last_te = NULL;
- for (cur_te = std_ev->timed_events; cur_te; cur_te = cur_te->next) {
- /* if the new event comes before the current one break */
- if (!timeval_is_zero(&cur_te->next_event) &&
- timeval_compare(&te->next_event,
- &cur_te->next_event) < 0) {
- break;
- }
-
- last_te = cur_te;
- }
-
- DLIST_ADD_AFTER(std_ev->timed_events, te, last_te);
-
- talloc_set_destructor(te, std_event_timed_destructor);
-
- return te;
-}
-
-/*
- a timer has gone off - call it
-*/
-static void std_event_loop_timer(struct std_event_context *std_ev)
-{
- struct timeval t = timeval_current();
- struct timed_event *te = std_ev->timed_events;
-
- if (te == NULL) {
- return;
- }
-
- /* deny the handler to free the event */
- talloc_set_destructor(te, std_event_timed_deny_destructor);
-
- /* We need to remove the timer from the list before calling the
- * handler because in a semi-async inner event loop called from the
- * handler we don't want to come across this event again -- vl */
- DLIST_REMOVE(std_ev->timed_events, te);
-
- te->handler(std_ev->ev, te, t, te->private_data);
-
- /* The destructor isn't necessary anymore, we've already removed the
- * event from the list. */
- talloc_set_destructor(te, NULL);
-
- talloc_free(te);
-}
-
-/*
- event loop handling using select()
-*/
-static int std_event_loop_select(struct std_event_context *std_ev, struct timeval *tvalp)
-{
- fd_set r_fds, w_fds;
- struct fd_event *fde;
- int selrtn;
- uint32_t destruction_count = std_ev->destruction_count;
-
- /* we maybe need to recalculate the maxfd */
- if (std_ev->maxfd == EVENT_INVALID_MAXFD) {
- calc_maxfd(std_ev);
- }
-
- FD_ZERO(&r_fds);
- FD_ZERO(&w_fds);
-
- /* setup any fd events */
- for (fde = std_ev->fd_events; fde; fde = fde->next) {
- if (fde->flags & EVENT_FD_READ) {
- FD_SET(fde->fd, &r_fds);
- }
- if (fde->flags & EVENT_FD_WRITE) {
- FD_SET(fde->fd, &w_fds);
- }
- }
-
- selrtn = select(std_ev->maxfd+1, &r_fds, &w_fds, NULL, tvalp);
-
- if (selrtn == -1 && errno == EBADF) {
- /* the socket is dead! this should never
- happen as the socket should have first been
- made readable and that should have removed
- the event, so this must be a bug. This is a
- fatal error. */
- DEBUG(0,("ERROR: EBADF on std_event_loop_once\n"));
- std_ev->exit_code = EBADF;
- return -1;
- }
-
- if (selrtn == 0 && tvalp) {
- std_event_loop_timer(std_ev);
- return 0;
- }
-
- if (selrtn > 0) {
- /* at least one file descriptor is ready - check
- which ones and call the handler, being careful to allow
- the handler to remove itself when called */
- for (fde = std_ev->fd_events; fde; fde = fde->next) {
- uint16_t flags = 0;
-
- if (FD_ISSET(fde->fd, &r_fds)) flags |= EVENT_FD_READ;
- if (FD_ISSET(fde->fd, &w_fds)) flags |= EVENT_FD_WRITE;
- if (flags) {
- fde->handler(std_ev->ev, fde, flags, fde->private_data);
- if (destruction_count != std_ev->destruction_count) {
- break;
- }
- }
- }
- }
-
- return 0;
-}
-
-/*
- do a single event loop using the events defined in ev
-*/
-static int std_event_loop_once(struct event_context *ev)
-{
- struct std_event_context *std_ev = talloc_get_type(ev->additional_data,
- struct std_event_context);
- struct timeval tval;
-
- /* work out the right timeout for all timed events */
- if (std_ev->timed_events) {
- struct timeval t = timeval_current();
- tval = timeval_until(&t, &std_ev->timed_events->next_event);
- if (timeval_is_zero(&tval)) {
- std_event_loop_timer(std_ev);
- return 0;
- }
- } else {
- /* have a default tick time of 30 seconds. This guarantees
- that code that uses its own timeout checking will be
- able to proceeed eventually */
- tval = timeval_set(30, 0);
- }
-
- if (epoll_event_loop(std_ev, &tval) == 0) {
- return 0;
- }
-
- return std_event_loop_select(std_ev, &tval);
-}
-
-/*
- return on failure or (with 0) if all fd events are removed
-*/
-static int std_event_loop_wait(struct event_context *ev)
-{
- struct std_event_context *std_ev = talloc_get_type(ev->additional_data,
- struct std_event_context);
- std_ev->exit_code = 0;
-
- while (std_ev->fd_events && std_ev->exit_code == 0) {
- if (std_event_loop_once(ev) != 0) {
- break;
- }
- }
-
- return std_ev->exit_code;
-}
-
-static const struct event_ops std_event_ops = {
- .context_init = std_event_context_init,
- .add_fd = std_event_add_fd,
- .get_fd_flags = std_event_get_fd_flags,
- .set_fd_flags = std_event_set_fd_flags,
- .add_timed = std_event_add_timed,
- .loop_once = std_event_loop_once,
- .loop_wait = std_event_loop_wait,
-};
-
-const struct event_ops *event_standard_get_ops(void)
-{
- return &std_event_ops;
-}
projects / thirdparty / samba.git / commitdiff
