1 /* 2 * QEMU Character device internals 3 * 4 * Copyright (c) 2003-2008 Fabrice Bellard 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 #ifndef CHARDEV_INTERNAL_H 25 #define CHARDEV_INTERNAL_H 26 27 #include "chardev/char.h" 28 #include "chardev/char-fe.h" 29 #include "qom/object.h" 30 31 #define MAX_MUX 4 32 #define MUX_BUFFER_SIZE 32 /* Must be a power of 2. */ 33 #define MUX_BUFFER_MASK (MUX_BUFFER_SIZE - 1) 34 35 struct MuxChardev { 36 Chardev parent; 37 CharBackend *backends[MAX_MUX]; 38 CharBackend chr; 39 int focus; 40 int mux_cnt; 41 int term_got_escape; 42 int max_size; 43 /* Intermediate input buffer catches escape sequences even if the 44 currently active device is not accepting any input - but only until it 45 is full as well. */ 46 unsigned char buffer[MAX_MUX][MUX_BUFFER_SIZE]; 47 int prod[MAX_MUX]; 48 int cons[MAX_MUX]; 49 int timestamps; 50 51 /* Protected by the Chardev chr_write_lock. */ 52 int linestart; 53 int64_t timestamps_start; 54 }; 55 typedef struct MuxChardev MuxChardev; 56 57 DECLARE_INSTANCE_CHECKER(MuxChardev, MUX_CHARDEV, 58 TYPE_CHARDEV_MUX) 59 #define CHARDEV_IS_MUX(chr) \ 60 object_dynamic_cast(OBJECT(chr), TYPE_CHARDEV_MUX) 61 62 void mux_set_focus(Chardev *chr, int focus); 63 void mux_chr_send_all_event(Chardev *chr, QEMUChrEvent event); 64 65 Object *get_chardevs_root(void); 66 67 #endif /* CHAR_MUX_H */ 68