| 1 | /* Copyright (C) 2007 L. Donnie Smith <donnie.smith@gatech.edu> |
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| 2 | * |
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| 3 | * This program is free software; you can redistribute it and/or modify |
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| 4 | * it under the terms of the GNU General Public License as published by |
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| 5 | * the Free Software Foundation; either version 2 of the License, or |
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| 6 | * (at your option) any later version. |
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| 7 | * |
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| 8 | * This program is distributed in the hope that it will be useful, |
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| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 11 | * GNU General Public License for more details. |
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| 12 | * |
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| 13 | * You should have received a copy of the GNU General Public License |
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| 14 | * along with this program; if not, write to the Free Software |
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| 15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 16 | * |
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| 17 | */ |
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| 18 | |
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| 19 | #include <stdlib.h> |
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| 20 | #include <string.h> |
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| 21 | #include <fcntl.h> |
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| 22 | #include <pthread.h> |
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| 23 | #include <sys/types.h> |
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| 24 | #include <sys/socket.h> |
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| 25 | #include <unistd.h> |
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| 26 | #include <bluetooth/bluetooth.h> |
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| 27 | #include <bluetooth/l2cap.h> |
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| 28 | #include "cwiid_internal.h" |
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| 29 | |
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| 30 | pthread_mutex_t global_mutex = PTHREAD_MUTEX_INITIALIZER; |
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| 31 | static int wiimote_id = 0; |
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| 32 | |
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| 33 | /* TODO: Turn this onto a macro on next major so version */ |
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| 34 | cwiid_wiimote_t *cwiid_open(bdaddr_t *bdaddr, int flags) |
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| 35 | { |
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| 36 | return cwiid_open_timeout(bdaddr, flags, DEFAULT_TIMEOUT); |
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| 37 | } |
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| 38 | |
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| 39 | cwiid_wiimote_t *cwiid_open_timeout(bdaddr_t *bdaddr, int flags, int timeout) |
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| 40 | { |
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| 41 | struct sockaddr_l2 remote_addr; |
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| 42 | int ctl_socket = -1, int_socket = -1; |
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| 43 | struct wiimote *wiimote = NULL; |
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| 44 | |
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| 45 | /* If BDADDR_ANY is given, find available wiimote */ |
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| 46 | if (bacmp(bdaddr, BDADDR_ANY) == 0) { |
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| 47 | if (cwiid_find_wiimote(bdaddr, timeout)) { |
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| 48 | goto ERR_HND; |
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| 49 | } |
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| 50 | sleep(1); |
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| 51 | } |
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| 52 | |
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| 53 | /* Connect to Wiimote */ |
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| 54 | /* Control Channel */ |
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| 55 | memset(&remote_addr, 0, sizeof remote_addr); |
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| 56 | remote_addr.l2_family = AF_BLUETOOTH; |
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| 57 | remote_addr.l2_bdaddr = *bdaddr; |
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| 58 | remote_addr.l2_psm = htobs(CTL_PSM); |
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| 59 | if ((ctl_socket = |
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| 60 | socket(AF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_L2CAP)) == -1) { |
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| 61 | cwiid_err(NULL, "Socket creation error (control socket)"); |
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| 62 | goto ERR_HND; |
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| 63 | } |
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| 64 | if (connect(ctl_socket, (struct sockaddr *)&remote_addr, |
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| 65 | sizeof remote_addr)) { |
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| 66 | cwiid_err(NULL, "Socket connect error (control socket)"); |
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| 67 | goto ERR_HND; |
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| 68 | } |
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| 69 | |
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| 70 | /* Interrupt Channel */ |
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| 71 | remote_addr.l2_psm = htobs(INT_PSM); |
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| 72 | if ((int_socket = |
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| 73 | socket(AF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_L2CAP)) == -1) { |
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| 74 | cwiid_err(NULL, "Socket creation error (interrupt socket)"); |
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| 75 | goto ERR_HND; |
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| 76 | } |
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| 77 | if (connect(int_socket, (struct sockaddr *)&remote_addr, |
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| 78 | sizeof remote_addr)) { |
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| 79 | cwiid_err(NULL, "Socket connect error (interrupt socket)"); |
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| 80 | goto ERR_HND; |
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| 81 | } |
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| 82 | |
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| 83 | if ((wiimote = cwiid_new(ctl_socket, int_socket, flags)) == NULL) { |
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| 84 | /* Raises its own error */ |
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| 85 | goto ERR_HND; |
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| 86 | } |
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| 87 | |
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| 88 | return wiimote; |
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| 89 | |
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| 90 | ERR_HND: |
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| 91 | /* Close Sockets */ |
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| 92 | if (ctl_socket != -1) { |
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| 93 | if (close(ctl_socket)) { |
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| 94 | cwiid_err(NULL, "Socket close error (control socket)"); |
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| 95 | } |
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| 96 | } |
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| 97 | if (int_socket != -1) { |
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| 98 | if (close(int_socket)) { |
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| 99 | cwiid_err(NULL, "Socket close error (interrupt socket)"); |
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| 100 | } |
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| 101 | } |
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| 102 | return NULL; |
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| 103 | } |
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| 104 | |
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| 105 | cwiid_wiimote_t *cwiid_listen(int flags) |
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| 106 | { |
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| 107 | struct sockaddr_l2 local_addr; |
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| 108 | struct sockaddr_l2 remote_addr; |
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| 109 | socklen_t socklen; |
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| 110 | int ctl_server_socket = -1, int_server_socket = -1, |
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| 111 | ctl_socket = -1, int_socket = -1; |
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| 112 | struct wiimote *wiimote = NULL; |
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| 113 | |
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| 114 | /* Connect to Wiimote */ |
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| 115 | /* Control Channel */ |
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| 116 | memset(&local_addr, 0, sizeof local_addr); |
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| 117 | local_addr.l2_family = AF_BLUETOOTH; |
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| 118 | local_addr.l2_bdaddr = *BDADDR_ANY; |
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| 119 | local_addr.l2_psm = htobs(CTL_PSM); |
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| 120 | if ((ctl_server_socket = |
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| 121 | socket(AF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_L2CAP)) == -1) { |
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| 122 | cwiid_err(NULL, "Socket creation error (control socket)"); |
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| 123 | goto ERR_HND; |
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| 124 | } |
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| 125 | if (bind(ctl_server_socket, (struct sockaddr *)&local_addr, |
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| 126 | sizeof local_addr)) { |
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| 127 | cwiid_err(NULL, "Socket bind error (control socket)"); |
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| 128 | goto ERR_HND; |
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| 129 | } |
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| 130 | if (listen(ctl_server_socket, 1)) { |
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| 131 | cwiid_err(NULL, "Socket listen error (control socket)"); |
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| 132 | goto ERR_HND; |
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| 133 | } |
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| 134 | |
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| 135 | /* Interrupt Channel */ |
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| 136 | local_addr.l2_psm = htobs(INT_PSM); |
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| 137 | if ((int_server_socket = |
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| 138 | socket(AF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_L2CAP)) == -1) { |
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| 139 | cwiid_err(NULL, "Socket creation error (interrupt socket)"); |
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| 140 | goto ERR_HND; |
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| 141 | } |
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| 142 | if (bind(int_server_socket, (struct sockaddr *)&local_addr, |
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| 143 | sizeof local_addr)) { |
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| 144 | cwiid_err(NULL, "Socket bind error (interrupt socket)"); |
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| 145 | goto ERR_HND; |
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| 146 | } |
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| 147 | if (listen(int_server_socket, 1)) { |
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| 148 | cwiid_err(NULL, "Socket listen error (interrupt socket)"); |
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| 149 | goto ERR_HND; |
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| 150 | } |
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| 151 | |
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| 152 | /* Block for Connections */ |
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| 153 | if ((ctl_socket = accept(ctl_server_socket, (struct sockaddr *)&remote_addr, &socklen)) < 0) { |
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| 154 | cwiid_err(NULL, "Socket accept error (control socket)"); |
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| 155 | goto ERR_HND; |
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| 156 | } |
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| 157 | if ((int_socket = accept(int_server_socket, (struct sockaddr *)&remote_addr, &socklen)) < 0) { |
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| 158 | cwiid_err(NULL, "Socket accept error (interrupt socket)"); |
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| 159 | goto ERR_HND; |
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| 160 | } |
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| 161 | |
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| 162 | /* Close server sockets */ |
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| 163 | if (close(ctl_server_socket)) { |
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| 164 | cwiid_err(NULL, "Socket close error (control socket)"); |
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| 165 | } |
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| 166 | if (close(int_server_socket)) { |
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| 167 | cwiid_err(NULL, "Socket close error (interrupt socket)"); |
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| 168 | } |
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| 169 | |
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| 170 | if ((wiimote = cwiid_new(ctl_socket, int_socket, flags)) == NULL) { |
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| 171 | /* Raises its own error */ |
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| 172 | goto ERR_HND; |
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| 173 | } |
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| 174 | |
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| 175 | return wiimote; |
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| 176 | |
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| 177 | ERR_HND: |
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| 178 | /* Close Sockets */ |
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| 179 | if (ctl_server_socket != -1) { |
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| 180 | if (close(ctl_server_socket)) { |
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| 181 | cwiid_err(NULL, "Socket close error (control server socket)"); |
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| 182 | } |
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| 183 | } |
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| 184 | if (int_server_socket != -1) { |
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| 185 | if (close(int_server_socket)) { |
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| 186 | cwiid_err(NULL, "Socket close error (interrupt server socket)"); |
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| 187 | } |
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| 188 | } |
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| 189 | if (ctl_socket != -1) { |
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| 190 | if (close(ctl_socket)) { |
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| 191 | cwiid_err(NULL, "Socket close error (control socket)"); |
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| 192 | } |
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| 193 | } |
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| 194 | if (int_socket != -1) { |
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| 195 | if (close(int_socket)) { |
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| 196 | cwiid_err(NULL, "Socket close error (interrupt socket)"); |
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| 197 | } |
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| 198 | } |
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| 199 | |
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| 200 | return NULL; |
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| 201 | } |
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| 202 | |
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| 203 | cwiid_wiimote_t *cwiid_new(int ctl_socket, int int_socket, int flags) |
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| 204 | { |
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| 205 | struct wiimote *wiimote = NULL; |
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| 206 | char mesg_pipe_init = 0, status_pipe_init = 0, rw_pipe_init = 0, |
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| 207 | state_mutex_init = 0, rw_mutex_init = 0, rpt_mutex_init = 0, |
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| 208 | router_thread_init = 0, status_thread_init = 0; |
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| 209 | void *pthread_ret; |
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| 210 | |
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| 211 | /* Allocate wiimote */ |
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| 212 | if ((wiimote = malloc(sizeof *wiimote)) == NULL) { |
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| 213 | cwiid_err(NULL, "Memory allocation error (cwiid_wiimote_t)"); |
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| 214 | goto ERR_HND; |
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| 215 | } |
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| 216 | |
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| 217 | /* set sockets and flags */ |
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| 218 | wiimote->ctl_socket = ctl_socket; |
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| 219 | wiimote->int_socket = int_socket; |
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| 220 | wiimote->flags = flags; |
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| 221 | |
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| 222 | /* Global Lock, Store and Increment wiimote_id */ |
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| 223 | if (pthread_mutex_lock(&global_mutex)) { |
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| 224 | cwiid_err(NULL, "Mutex lock error (global mutex)"); |
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| 225 | goto ERR_HND; |
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| 226 | } |
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| 227 | wiimote->id = wiimote_id++; |
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| 228 | if (pthread_mutex_unlock(&global_mutex)) { |
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| 229 | cwiid_err(wiimote, "Mutex unlock error (global mutex) - " |
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| 230 | "deadlock warning"); |
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| 231 | goto ERR_HND; |
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| 232 | } |
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| 233 | |
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| 234 | /* Create pipes */ |
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| 235 | if (pipe(wiimote->mesg_pipe)) { |
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| 236 | cwiid_err(wiimote, "Pipe creation error (mesg pipe)"); |
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| 237 | goto ERR_HND; |
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| 238 | } |
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| 239 | mesg_pipe_init = 1; |
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| 240 | if (pipe(wiimote->status_pipe)) { |
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| 241 | cwiid_err(wiimote, "Pipe creation error (status pipe)"); |
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| 242 | goto ERR_HND; |
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| 243 | } |
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| 244 | status_pipe_init = 1; |
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| 245 | if (pipe(wiimote->rw_pipe)) { |
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| 246 | cwiid_err(wiimote, "Pipe creation error (rw pipe)"); |
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| 247 | goto ERR_HND; |
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| 248 | } |
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| 249 | rw_pipe_init = 1; |
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| 250 | |
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| 251 | /* Setup blocking */ |
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| 252 | if (fcntl(wiimote->mesg_pipe[1], F_SETFL, O_NONBLOCK)) { |
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| 253 | cwiid_err(wiimote, "File control error (mesg write pipe)"); |
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| 254 | goto ERR_HND; |
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| 255 | } |
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| 256 | if (wiimote->flags & CWIID_FLAG_NONBLOCK) { |
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| 257 | if (fcntl(wiimote->mesg_pipe[0], F_SETFL, O_NONBLOCK)) { |
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| 258 | cwiid_err(wiimote, "File control error (mesg read pipe)"); |
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| 259 | goto ERR_HND; |
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| 260 | } |
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| 261 | } |
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| 262 | |
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| 263 | /* Init mutexes */ |
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| 264 | if (pthread_mutex_init(&wiimote->state_mutex, NULL)) { |
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| 265 | cwiid_err(wiimote, "Mutex initialization error (state mutex)"); |
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| 266 | goto ERR_HND; |
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| 267 | } |
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| 268 | state_mutex_init = 1; |
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| 269 | if (pthread_mutex_init(&wiimote->rw_mutex, NULL)) { |
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| 270 | cwiid_err(wiimote, "Mutex initialization error (rw mutex)"); |
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| 271 | goto ERR_HND; |
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| 272 | } |
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| 273 | rw_mutex_init = 1; |
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| 274 | if (pthread_mutex_init(&wiimote->rpt_mutex, NULL)) { |
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| 275 | cwiid_err(wiimote, "Mutex initialization error (rpt mutex)"); |
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| 276 | goto ERR_HND; |
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| 277 | } |
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| 278 | rpt_mutex_init = 1; |
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| 279 | |
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| 280 | /* Set rw_status before starting router thread */ |
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| 281 | wiimote->rw_status = RW_IDLE; |
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| 282 | |
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| 283 | /* Launch interrupt socket listener and dispatch threads */ |
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| 284 | if (pthread_create(&wiimote->router_thread, NULL, |
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| 285 | (void *(*)(void *))&router_thread, wiimote)) { |
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| 286 | cwiid_err(wiimote, "Thread creation error (router thread)"); |
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| 287 | goto ERR_HND; |
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| 288 | } |
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| 289 | router_thread_init = 1; |
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| 290 | if (pthread_create(&wiimote->status_thread, NULL, |
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| 291 | (void *(*)(void *))&status_thread, wiimote)) { |
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| 292 | cwiid_err(wiimote, "Thread creation error (status thread)"); |
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| 293 | goto ERR_HND; |
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| 294 | } |
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| 295 | status_thread_init = 1; |
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| 296 | |
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| 297 | /* Success! Update state */ |
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| 298 | memset(&wiimote->state, 0, sizeof wiimote->state); |
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| 299 | wiimote->mesg_callback = NULL; |
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| 300 | cwiid_set_led(wiimote, 0); |
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| 301 | cwiid_request_status(wiimote); |
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| 302 | |
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| 303 | return wiimote; |
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| 304 | |
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| 305 | ERR_HND: |
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| 306 | if (wiimote) { |
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| 307 | /* Close threads */ |
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| 308 | if (router_thread_init) { |
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| 309 | pthread_cancel(wiimote->router_thread); |
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| 310 | if (pthread_join(wiimote->router_thread, &pthread_ret)) { |
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| 311 | cwiid_err(wiimote, "Thread join error (router thread)"); |
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| 312 | } |
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| 313 | else if (!((pthread_ret == PTHREAD_CANCELED) && |
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| 314 | (pthread_ret == NULL))) { |
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| 315 | cwiid_err(wiimote, "Bad return value from router thread"); |
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| 316 | } |
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| 317 | } |
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| 318 | |
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| 319 | if (status_thread_init) { |
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| 320 | pthread_cancel(wiimote->status_thread); |
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| 321 | if (pthread_join(wiimote->status_thread, &pthread_ret)) { |
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| 322 | cwiid_err(wiimote, "Thread join error (status thread)"); |
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| 323 | } |
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| 324 | else if (!((pthread_ret == PTHREAD_CANCELED) && (pthread_ret == NULL))) { |
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| 325 | cwiid_err(wiimote, "Bad return value from status thread"); |
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| 326 | } |
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| 327 | } |
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| 328 | |
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| 329 | /* Close Pipes */ |
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| 330 | if (mesg_pipe_init) { |
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| 331 | if (close(wiimote->mesg_pipe[0]) || close(wiimote->mesg_pipe[1])) { |
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| 332 | cwiid_err(wiimote, "Pipe close error (mesg pipe)"); |
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| 333 | } |
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| 334 | } |
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| 335 | if (status_pipe_init) { |
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| 336 | if (close(wiimote->status_pipe[0]) || |
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| 337 | close(wiimote->status_pipe[1])) { |
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| 338 | cwiid_err(wiimote, "Pipe close error (status pipe)"); |
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| 339 | } |
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| 340 | } |
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| 341 | if (rw_pipe_init) { |
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| 342 | if (close(wiimote->rw_pipe[0]) || close(wiimote->rw_pipe[1])) { |
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| 343 | cwiid_err(wiimote, "Pipe close error (rw pipe)"); |
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| 344 | } |
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| 345 | } |
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| 346 | /* Destroy Mutexes */ |
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| 347 | if (state_mutex_init) { |
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| 348 | if (pthread_mutex_destroy(&wiimote->state_mutex)) { |
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| 349 | cwiid_err(wiimote, "Mutex destroy error (state mutex)"); |
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| 350 | } |
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| 351 | } |
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| 352 | if (rw_mutex_init) { |
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| 353 | if (pthread_mutex_destroy(&wiimote->rw_mutex)) { |
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| 354 | cwiid_err(wiimote, "Mutex destroy error (rw mutex)"); |
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| 355 | } |
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| 356 | } |
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| 357 | if (rpt_mutex_init) { |
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| 358 | if (pthread_mutex_destroy(&wiimote->rpt_mutex)) { |
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| 359 | cwiid_err(wiimote, "Mutex destroy error (rpt mutex)"); |
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| 360 | } |
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| 361 | } |
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| 362 | free(wiimote); |
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| 363 | } |
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| 364 | return NULL; |
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| 365 | } |
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| 366 | |
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| 367 | int cwiid_close(cwiid_wiimote_t *wiimote) |
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| 368 | { |
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| 369 | void *pthread_ret; |
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| 370 | |
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| 371 | /* Stop rumbling, otherwise wiimote continues to rumble for |
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| 372 | few seconds after closing the connection! There should be no |
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| 373 | need to check if stopping fails: we are closing the connection |
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| 374 | in any case. */ |
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| 375 | if (wiimote->state.rumble) { |
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| 376 | cwiid_set_rumble(wiimote, 0); |
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| 377 | } |
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| 378 | |
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| 379 | /* Cancel and join router_thread and status_thread */ |
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| 380 | if (pthread_cancel(wiimote->router_thread)) { |
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| 381 | /* if thread quit abnormally, would have printed it's own error */ |
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| 382 | } |
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| 383 | if (pthread_join(wiimote->router_thread, &pthread_ret)) { |
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| 384 | cwiid_err(wiimote, "Thread join error (router thread)"); |
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| 385 | } |
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| 386 | else if (!((pthread_ret == PTHREAD_CANCELED) || (pthread_ret == NULL))) { |
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| 387 | cwiid_err(wiimote, "Bad return value from router thread"); |
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| 388 | } |
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| 389 | |
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| 390 | if (pthread_cancel(wiimote->status_thread)) { |
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| 391 | /* if thread quit abnormally, would have printed it's own error */ |
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| 392 | } |
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| 393 | if (pthread_join(wiimote->status_thread, &pthread_ret)) { |
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| 394 | cwiid_err(wiimote, "Thread join error (status thread)"); |
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| 395 | } |
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| 396 | else if (!((pthread_ret == PTHREAD_CANCELED) || (pthread_ret == NULL))) { |
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| 397 | cwiid_err(wiimote, "Bad return value from status thread"); |
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| 398 | } |
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| 399 | |
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| 400 | if (wiimote->mesg_callback) { |
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| 401 | if (cancel_mesg_callback(wiimote)) { |
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| 402 | /* prints it's own errors */ |
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| 403 | } |
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| 404 | } |
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| 405 | |
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| 406 | if (cancel_rw(wiimote)) { |
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| 407 | /* prints it's own errors */ |
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| 408 | } |
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| 409 | |
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| 410 | /* Close sockets */ |
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| 411 | if (close(wiimote->int_socket)) { |
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| 412 | cwiid_err(wiimote, "Socket close error (interrupt socket)"); |
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| 413 | } |
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| 414 | if (close(wiimote->ctl_socket)) { |
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| 415 | cwiid_err(wiimote, "Socket close error (control socket)"); |
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| 416 | } |
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| 417 | /* Close Pipes */ |
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| 418 | if (close(wiimote->mesg_pipe[0]) || close(wiimote->mesg_pipe[1])) { |
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| 419 | cwiid_err(wiimote, "Pipe close error (mesg pipe)"); |
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| 420 | } |
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| 421 | if (close(wiimote->status_pipe[0]) || close(wiimote->status_pipe[1])) { |
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| 422 | cwiid_err(wiimote, "Pipe close error (status pipe)"); |
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| 423 | } |
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| 424 | if (close(wiimote->rw_pipe[0]) || close(wiimote->rw_pipe[1])) { |
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| 425 | cwiid_err(wiimote, "Pipe close error (rw pipe)"); |
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| 426 | } |
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| 427 | /* Destroy mutexes */ |
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| 428 | if (pthread_mutex_destroy(&wiimote->state_mutex)) { |
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| 429 | cwiid_err(wiimote, "Mutex destroy error (state)"); |
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| 430 | } |
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| 431 | if (pthread_mutex_destroy(&wiimote->rw_mutex)) { |
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| 432 | cwiid_err(wiimote, "Mutex destroy error (rw)"); |
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| 433 | } |
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| 434 | if (pthread_mutex_destroy(&wiimote->rpt_mutex)) { |
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| 435 | cwiid_err(wiimote, "Mutex destroy error (rpt)"); |
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| 436 | } |
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| 437 | |
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| 438 | free(wiimote); |
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| 439 | |
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| 440 | return 0; |
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| 441 | } |
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