1 /* 2 * Copyright (C) 2021 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "btstack_signal.c" 39 40 #include "btstack_signal.h" 41 42 #include <pthread.h> 43 #include <signal.h> 44 #include <string.h> 45 46 #include "btstack_run_loop.h" 47 48 static void signal_callback(void * arg){ 49 void (*callback)(void) = (void (*)(void)) arg; 50 (*callback)(); 51 } 52 53 static void * signal_thread(void *arg) { 54 while (1){ 55 // wait for signal 56 sigset_t sigset; 57 sigemptyset(&sigset); 58 sigaddset(&sigset, SIGINT); 59 int sig = 0; 60 (void) sigwait(&sigset, &sig); 61 62 // execute callback on main thread 63 btstack_context_callback_registration_t registration; 64 memset(®istration, 0, sizeof(btstack_context_callback_registration_t)); 65 registration.callback = &signal_callback; 66 registration.context = arg; 67 btstack_run_loop_execute_on_main_thread(®istration); 68 } 69 return NULL; 70 } 71 72 void btstack_signal_register_callback(int signal, void (*callback)(void)) { 73 // block signal 74 sigset_t base_mask; 75 sigemptyset (&base_mask); 76 sigaddset (&base_mask, signal); 77 sigprocmask (SIG_SETMASK, &base_mask, NULL); 78 79 // start thread to receive signal 80 pthread_t thread; 81 pthread_create(&thread, NULL, signal_thread, (void*) callback); 82 } 83