| 1 | /*
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| 2 | Unix SMB/CIFS implementation.
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| 3 |
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| 4 | common events code for fd events
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| 5 |
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| 6 | Copyright (C) Stefan Metzmacher 2009
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| 7 |
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| 8 | ** NOTE! The following LGPL license applies to the tevent
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| 9 | ** library. This does NOT imply that all of Samba is released
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| 10 | ** under the LGPL
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| 11 |
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| 12 | This library is free software; you can redistribute it and/or
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| 13 | modify it under the terms of the GNU Lesser General Public
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| 14 | License as published by the Free Software Foundation; either
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| 15 | version 3 of the License, or (at your option) any later version.
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| 16 |
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| 17 | This library is distributed in the hope that it will be useful,
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| 18 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | Lesser General Public License for more details.
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| 21 |
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| 22 | You should have received a copy of the GNU Lesser General Public
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| 23 | License along with this library; if not, see <http://www.gnu.org/licenses/>.
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| 24 | */
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| 25 |
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| 26 | #include "replace.h"
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| 27 | #include "tevent.h"
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| 28 | #include "tevent_internal.h"
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| 29 | #include "tevent_util.h"
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| 30 |
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| 31 | int tevent_common_fd_destructor(struct tevent_fd *fde)
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| 32 | {
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| 33 | if (fde->event_ctx) {
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| 34 | DLIST_REMOVE(fde->event_ctx->fd_events, fde);
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| 35 | }
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| 36 |
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| 37 | if (fde->close_fn) {
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| 38 | fde->close_fn(fde->event_ctx, fde, fde->fd, fde->private_data);
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| 39 | fde->fd = -1;
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| 40 | }
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| 41 |
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| 42 | return 0;
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| 43 | }
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| 44 |
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| 45 | struct tevent_fd *tevent_common_add_fd(struct tevent_context *ev, TALLOC_CTX *mem_ctx,
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| 46 | int fd, uint16_t flags,
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| 47 | tevent_fd_handler_t handler,
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| 48 | void *private_data,
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| 49 | const char *handler_name,
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| 50 | const char *location)
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| 51 | {
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| 52 | struct tevent_fd *fde;
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| 53 |
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| 54 | /* tevent will crash later on select() if we save
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| 55 | * a negative file descriptor. Better to fail here
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| 56 | * so that consumers will be able to debug it
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| 57 | */
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| 58 | if (fd < 0) return NULL;
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| 59 |
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| 60 | fde = talloc(mem_ctx?mem_ctx:ev, struct tevent_fd);
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| 61 | if (!fde) return NULL;
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| 62 |
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| 63 | fde->event_ctx = ev;
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| 64 | fde->fd = fd;
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| 65 | fde->flags = flags;
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| 66 | fde->handler = handler;
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| 67 | fde->close_fn = NULL;
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| 68 | fde->private_data = private_data;
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| 69 | fde->handler_name = handler_name;
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| 70 | fde->location = location;
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| 71 | fde->additional_flags = 0;
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| 72 | fde->additional_data = NULL;
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| 73 |
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| 74 | DLIST_ADD(ev->fd_events, fde);
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| 75 |
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| 76 | talloc_set_destructor(fde, tevent_common_fd_destructor);
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| 77 |
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| 78 | return fde;
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| 79 | }
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| 80 | uint16_t tevent_common_fd_get_flags(struct tevent_fd *fde)
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| 81 | {
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| 82 | return fde->flags;
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| 83 | }
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| 84 |
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| 85 | void tevent_common_fd_set_flags(struct tevent_fd *fde, uint16_t flags)
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| 86 | {
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| 87 | if (fde->flags == flags) return;
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| 88 | fde->flags = flags;
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| 89 | }
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| 90 |
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| 91 | void tevent_common_fd_set_close_fn(struct tevent_fd *fde,
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| 92 | tevent_fd_close_fn_t close_fn)
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| 93 | {
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| 94 | fde->close_fn = close_fn;
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| 95 | }
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