[3470] | 1 | //mainloop-signal.c: |
---|
| 2 | |
---|
| 3 | /* |
---|
| 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2010 |
---|
| 5 | * The code (may) include prototypes and comments (and maybe |
---|
| 6 | * other code fragements) from libpulse*. They are mostly copyrighted by: |
---|
| 7 | * Lennart Poettering <poettering@users.sourceforge.net> and |
---|
| 8 | * Pierre Ossman <drzeus@drzeus.cx> |
---|
| 9 | * |
---|
| 10 | * This file is part of libroarpulse a part of RoarAudio, |
---|
| 11 | * a cross-platform sound system for both, home and professional use. |
---|
| 12 | * See README for details. |
---|
| 13 | * |
---|
| 14 | * This file is free software; you can redistribute it and/or modify |
---|
| 15 | * it under the terms of the GNU General Public License version 3 |
---|
| 16 | * as published by the Free Software Foundation. |
---|
| 17 | * |
---|
| 18 | * RoarAudio is distributed in the hope that it will be useful, |
---|
| 19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
---|
| 20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
---|
| 21 | * GNU General Public License for more details. |
---|
| 22 | * |
---|
| 23 | * You should have received a copy of the GNU General Public License |
---|
| 24 | * along with this software; see the file COPYING. If not, write to |
---|
[3517] | 25 | * the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
---|
| 26 | * Boston, MA 02110-1301, USA. |
---|
[3470] | 27 | * |
---|
| 28 | * NOTE for everyone want's to change something and send patches: |
---|
| 29 | * read README and HACKING! There a addition information on |
---|
| 30 | * the license of this document you need to read before you send |
---|
| 31 | * any patches. |
---|
| 32 | * |
---|
| 33 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
---|
| 34 | * or libpulse*: |
---|
| 35 | * The libs libroaresd, libroararts and libroarpulse link this libroar |
---|
| 36 | * and are therefore GPL. Because of this it may be illigal to use |
---|
| 37 | * them with any software that uses libesd, libartsc or libpulse*. |
---|
| 38 | */ |
---|
| 39 | |
---|
| 40 | #include <libroarpulse/libroarpulse.h> |
---|
| 41 | |
---|
[3471] | 42 | #define MAX_SIG 64 /* there is no way to find out */ |
---|
| 43 | |
---|
| 44 | typedef void (*pa_signal_cb_t) (pa_mainloop_api *api, pa_signal_event*e, int sig, void *userdata); |
---|
| 45 | |
---|
| 46 | struct pa_signal_event { |
---|
| 47 | int used; |
---|
| 48 | int sig; |
---|
| 49 | pa_signal_cb_t cb; |
---|
| 50 | void * userdata; |
---|
| 51 | }; |
---|
| 52 | |
---|
| 53 | static int _roar_pa_signal_inited = 0; |
---|
| 54 | |
---|
| 55 | static struct { |
---|
| 56 | pa_mainloop_api * api; |
---|
| 57 | pa_signal_event sig[MAX_SIG]; |
---|
[3494] | 58 | #ifdef ROAR_HAVE_PIPE |
---|
[3480] | 59 | int pipefh[2]; |
---|
| 60 | pa_io_event * io_event; |
---|
[3494] | 61 | #endif |
---|
[3471] | 62 | } _roar_pa_signal; |
---|
| 63 | |
---|
[3494] | 64 | static void _roar_pa_signal_iocb( |
---|
| 65 | #ifndef ROAR_HAVE_PIPE |
---|
| 66 | int sig |
---|
| 67 | #else |
---|
| 68 | pa_mainloop_api * a, |
---|
[3480] | 69 | pa_io_event * e, |
---|
| 70 | int fd, |
---|
| 71 | pa_io_event_flags_t f, |
---|
[3494] | 72 | void *userdata |
---|
| 73 | #endif |
---|
| 74 | ) { |
---|
[3480] | 75 | pa_signal_event * se; |
---|
[3494] | 76 | #ifdef ROAR_HAVE_PIPE |
---|
[3480] | 77 | int sig; |
---|
| 78 | size_t ret; |
---|
| 79 | |
---|
| 80 | ret = read(fd, &sig, sizeof(sig)); |
---|
| 81 | |
---|
| 82 | if ( ret != sizeof(sig) ) |
---|
| 83 | return; |
---|
[3496] | 84 | #endif |
---|
[3473] | 85 | |
---|
| 86 | if ( sig >= MAX_SIG ) |
---|
| 87 | return; |
---|
| 88 | |
---|
[3480] | 89 | se = &(_roar_pa_signal.sig[sig]); |
---|
[3473] | 90 | |
---|
[3480] | 91 | if ( !se->used ) |
---|
[3473] | 92 | return; |
---|
| 93 | |
---|
[3482] | 94 | ROAR_DBG("_roar_pa_signal_iocb(*): sig=%s(%i), se->cb=%p", strsignal(sig), sig, se->cb); |
---|
| 95 | |
---|
[3480] | 96 | if ( se->cb != NULL ) |
---|
| 97 | se->cb(_roar_pa_signal.api, se, sig, se->userdata); |
---|
[3471] | 98 | } |
---|
| 99 | |
---|
[3494] | 100 | static void _roar_pa_signal_handler (int sig) { |
---|
| 101 | #ifdef ROAR_HAVE_PIPE |
---|
| 102 | write(_roar_pa_signal.pipefh[1], &sig, sizeof(sig)); |
---|
| 103 | #else |
---|
[3495] | 104 | _roar_pa_signal_iocb(sig); |
---|
[3494] | 105 | #endif |
---|
| 106 | } |
---|
| 107 | |
---|
[3471] | 108 | /** Initialize the UNIX signal subsystem and bind it to the specified main loop */ |
---|
| 109 | int pa_signal_init(pa_mainloop_api *api) { |
---|
| 110 | |
---|
| 111 | if ( _roar_pa_signal_inited ) |
---|
| 112 | return -1; |
---|
| 113 | |
---|
| 114 | memset(&_roar_pa_signal, 0, sizeof(_roar_pa_signal)); |
---|
| 115 | |
---|
| 116 | _roar_pa_signal.api = api; |
---|
| 117 | |
---|
[3494] | 118 | #ifdef ROAR_HAVE_PIPE |
---|
[3480] | 119 | if ( pipe(_roar_pa_signal.pipefh) == -1 ) |
---|
| 120 | return -1; |
---|
| 121 | |
---|
| 122 | _roar_pa_signal.io_event = api->io_new(api, _roar_pa_signal.pipefh[0], PA_IO_EVENT_INPUT, _roar_pa_signal_iocb, NULL); |
---|
[3494] | 123 | #endif |
---|
[3480] | 124 | |
---|
[3471] | 125 | _roar_pa_signal_inited = 1; |
---|
| 126 | |
---|
| 127 | return 0; |
---|
| 128 | } |
---|
| 129 | |
---|
| 130 | /** Cleanup the signal subsystem */ |
---|
| 131 | void pa_signal_done(void) { |
---|
[3480] | 132 | int i; |
---|
| 133 | |
---|
| 134 | for (i = 0; i < MAX_SIG; i++) { |
---|
| 135 | _roar_pa_signal.sig[i].used = 0; |
---|
| 136 | } |
---|
| 137 | |
---|
[3495] | 138 | #ifdef ROAR_HAVE_PIPE |
---|
[3480] | 139 | _roar_pa_signal.api->io_free(_roar_pa_signal.io_event); |
---|
[3495] | 140 | #endif |
---|
[3480] | 141 | |
---|
[3471] | 142 | _roar_pa_signal_inited = 0; |
---|
| 143 | } |
---|
| 144 | |
---|
| 145 | /** Create a new UNIX signal event source object */ |
---|
| 146 | pa_signal_event* pa_signal_new(int sig, pa_signal_cb_t callback, void *userdata) { |
---|
| 147 | if ( !_roar_pa_signal_inited ) |
---|
| 148 | return NULL; |
---|
| 149 | |
---|
| 150 | if ( sig >= MAX_SIG ) |
---|
| 151 | return NULL; |
---|
| 152 | |
---|
| 153 | _roar_pa_signal.sig[sig].used = 1; |
---|
| 154 | _roar_pa_signal.sig[sig].sig = sig; |
---|
| 155 | _roar_pa_signal.sig[sig].cb = callback; |
---|
| 156 | _roar_pa_signal.sig[sig].userdata = userdata; |
---|
| 157 | |
---|
| 158 | signal(sig, _roar_pa_signal_handler); |
---|
| 159 | |
---|
| 160 | return &(_roar_pa_signal.sig[sig]); |
---|
| 161 | } |
---|
| 162 | |
---|
| 163 | /** Free a UNIX signal event source object */ |
---|
| 164 | void pa_signal_free(pa_signal_event *e) { |
---|
| 165 | if ( !_roar_pa_signal_inited ) |
---|
| 166 | return; |
---|
| 167 | |
---|
| 168 | if ( e == NULL ) |
---|
| 169 | return; |
---|
| 170 | |
---|
| 171 | signal(e->sig, SIG_DFL); |
---|
| 172 | |
---|
| 173 | e->used = 0; |
---|
| 174 | } |
---|
| 175 | |
---|
| 176 | /** Set a function that is called when the signal event source is destroyed. Use this to free the userdata argument if required */ |
---|
| 177 | void pa_signal_set_destroy(pa_signal_event *e, void (*callback) (pa_mainloop_api *api, pa_signal_event*e, void *userdata)); |
---|
| 178 | |
---|
[3470] | 179 | //ll |
---|