| 1 | /* |
| 2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> |
| 3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License, version 2 only, |
| 7 | * as published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License along |
| 15 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 17 | */ |
| 18 | |
| 19 | #define _LGPL_SOURCE |
| 20 | #include <stdlib.h> |
| 21 | #include <unistd.h> |
| 22 | |
| 23 | #include <common/error.h> |
| 24 | |
| 25 | #include "utils.h" |
| 26 | #include "lttng-sessiond.h" |
| 27 | |
| 28 | int ht_cleanup_pipe[2] = { -1, -1 }; |
| 29 | |
| 30 | /* |
| 31 | * Write to writable pipe used to notify a thread. |
| 32 | */ |
| 33 | int notify_thread_pipe(int wpipe) |
| 34 | { |
| 35 | ssize_t ret; |
| 36 | |
| 37 | /* Ignore if the pipe is invalid. */ |
| 38 | if (wpipe < 0) { |
| 39 | return 0; |
| 40 | } |
| 41 | |
| 42 | ret = lttng_write(wpipe, "!", 1); |
| 43 | if (ret < 1) { |
| 44 | PERROR("write poll pipe"); |
| 45 | } |
| 46 | |
| 47 | return (int) ret; |
| 48 | } |
| 49 | |
| 50 | void ht_cleanup_push(struct lttng_ht *ht) |
| 51 | { |
| 52 | ssize_t ret; |
| 53 | int fd = ht_cleanup_pipe[1]; |
| 54 | |
| 55 | if (!ht) { |
| 56 | return; |
| 57 | } |
| 58 | if (fd < 0) |
| 59 | return; |
| 60 | ret = lttng_write(fd, &ht, sizeof(ht)); |
| 61 | if (ret < sizeof(ht)) { |
| 62 | PERROR("write ht cleanup pipe %d", fd); |
| 63 | if (ret < 0) { |
| 64 | ret = -errno; |
| 65 | } |
| 66 | goto error; |
| 67 | } |
| 68 | |
| 69 | /* All good. Don't send back the write positive ret value. */ |
| 70 | ret = 0; |
| 71 | error: |
| 72 | assert(!ret); |
| 73 | } |
| 74 | |
| 75 | int loglevels_match(int a_loglevel_type, int a_loglevel_value, |
| 76 | int b_loglevel_type, int b_loglevel_value, int loglevel_all_type) |
| 77 | { |
| 78 | int match = 1; |
| 79 | |
| 80 | if (a_loglevel_type == b_loglevel_type) { |
| 81 | /* Same loglevel type. */ |
| 82 | if (b_loglevel_type != loglevel_all_type) { |
| 83 | /* |
| 84 | * Loglevel value must also match since the loglevel |
| 85 | * type is not all. |
| 86 | */ |
| 87 | if (a_loglevel_value != b_loglevel_value) { |
| 88 | match = 0; |
| 89 | } |
| 90 | } |
| 91 | } else { |
| 92 | /* Loglevel type is different: no match. */ |
| 93 | match = 0; |
| 94 | } |
| 95 | |
| 96 | return match; |
| 97 | } |