1ffa0f7ebSPhilippe Mathieu-Daudé /* 2ffa0f7ebSPhilippe Mathieu-Daudé * QEMU Character device internals 3ffa0f7ebSPhilippe Mathieu-Daudé * 4ffa0f7ebSPhilippe Mathieu-Daudé * Copyright (c) 2003-2008 Fabrice Bellard 5ffa0f7ebSPhilippe Mathieu-Daudé * 6ffa0f7ebSPhilippe Mathieu-Daudé * Permission is hereby granted, free of charge, to any person obtaining a copy 7ffa0f7ebSPhilippe Mathieu-Daudé * of this software and associated documentation files (the "Software"), to deal 8ffa0f7ebSPhilippe Mathieu-Daudé * in the Software without restriction, including without limitation the rights 9ffa0f7ebSPhilippe Mathieu-Daudé * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10ffa0f7ebSPhilippe Mathieu-Daudé * copies of the Software, and to permit persons to whom the Software is 11ffa0f7ebSPhilippe Mathieu-Daudé * furnished to do so, subject to the following conditions: 12ffa0f7ebSPhilippe Mathieu-Daudé * 13ffa0f7ebSPhilippe Mathieu-Daudé * The above copyright notice and this permission notice shall be included in 14ffa0f7ebSPhilippe Mathieu-Daudé * all copies or substantial portions of the Software. 15ffa0f7ebSPhilippe Mathieu-Daudé * 16ffa0f7ebSPhilippe Mathieu-Daudé * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17ffa0f7ebSPhilippe Mathieu-Daudé * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18ffa0f7ebSPhilippe Mathieu-Daudé * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19ffa0f7ebSPhilippe Mathieu-Daudé * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20ffa0f7ebSPhilippe Mathieu-Daudé * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21ffa0f7ebSPhilippe Mathieu-Daudé * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22ffa0f7ebSPhilippe Mathieu-Daudé * THE SOFTWARE. 23ffa0f7ebSPhilippe Mathieu-Daudé */ 24ea9cea93SMarkus Armbruster 25ffa0f7ebSPhilippe Mathieu-Daudé #ifndef CHARDEV_INTERNAL_H 26ffa0f7ebSPhilippe Mathieu-Daudé #define CHARDEV_INTERNAL_H 27ffa0f7ebSPhilippe Mathieu-Daudé 28ffa0f7ebSPhilippe Mathieu-Daudé #include "chardev/char.h" 29ffa0f7ebSPhilippe Mathieu-Daudé #include "chardev/char-fe.h" 3030827badSPhilippe Mathieu-Daudé #include "qom/object.h" 31ffa0f7ebSPhilippe Mathieu-Daudé 32ffa0f7ebSPhilippe Mathieu-Daudé #define MAX_MUX 4 33ffa0f7ebSPhilippe Mathieu-Daudé #define MUX_BUFFER_SIZE 32 /* Must be a power of 2. */ 34ffa0f7ebSPhilippe Mathieu-Daudé #define MUX_BUFFER_MASK (MUX_BUFFER_SIZE - 1) 35ffa0f7ebSPhilippe Mathieu-Daudé 36db1015e9SEduardo Habkost struct MuxChardev { 37ffa0f7ebSPhilippe Mathieu-Daudé Chardev parent; 38ffa0f7ebSPhilippe Mathieu-Daudé CharBackend *backends[MAX_MUX]; 39ffa0f7ebSPhilippe Mathieu-Daudé CharBackend chr; 40005b6d51SRoman Penyaev unsigned long mux_bitset; 41ffa0f7ebSPhilippe Mathieu-Daudé int focus; 421ba39940SRoman Penyaev bool term_got_escape; 43ffa0f7ebSPhilippe Mathieu-Daudé /* Intermediate input buffer catches escape sequences even if the 44ffa0f7ebSPhilippe Mathieu-Daudé currently active device is not accepting any input - but only until it 45ffa0f7ebSPhilippe Mathieu-Daudé is full as well. */ 46ffa0f7ebSPhilippe Mathieu-Daudé unsigned char buffer[MAX_MUX][MUX_BUFFER_SIZE]; 47c64f0bc1SRoman Penyaev unsigned int prod[MAX_MUX]; 48c64f0bc1SRoman Penyaev unsigned int cons[MAX_MUX]; 49ffa0f7ebSPhilippe Mathieu-Daudé int timestamps; 50ffa0f7ebSPhilippe Mathieu-Daudé 51ffa0f7ebSPhilippe Mathieu-Daudé /* Protected by the Chardev chr_write_lock. */ 521ba39940SRoman Penyaev bool linestart; 53ffa0f7ebSPhilippe Mathieu-Daudé int64_t timestamps_start; 54db1015e9SEduardo Habkost }; 55db1015e9SEduardo Habkost typedef struct MuxChardev MuxChardev; 56ffa0f7ebSPhilippe Mathieu-Daudé 578110fa1dSEduardo Habkost DECLARE_INSTANCE_CHECKER(MuxChardev, MUX_CHARDEV, 588110fa1dSEduardo Habkost TYPE_CHARDEV_MUX) 59ffa0f7ebSPhilippe Mathieu-Daudé #define CHARDEV_IS_MUX(chr) \ 60ffa0f7ebSPhilippe Mathieu-Daudé object_dynamic_cast(OBJECT(chr), TYPE_CHARDEV_MUX) 61ffa0f7ebSPhilippe Mathieu-Daudé 62709a4cabSRoman Penyaev bool mux_chr_attach_frontend(MuxChardev *d, CharBackend *b, 63709a4cabSRoman Penyaev unsigned int *tag, Error **errp); 64*327993f1SRoman Penyaev bool mux_chr_detach_frontend(MuxChardev *d, unsigned int tag); 65c64f0bc1SRoman Penyaev void mux_set_focus(Chardev *chr, unsigned int focus); 66ffa0f7ebSPhilippe Mathieu-Daudé void mux_chr_send_all_event(Chardev *chr, QEMUChrEvent event); 67ffa0f7ebSPhilippe Mathieu-Daudé 6830827badSPhilippe Mathieu-Daudé Object *get_chardevs_root(void); 6930827badSPhilippe Mathieu-Daudé 70ea9cea93SMarkus Armbruster #endif /* CHARDEV_INTERNAL_H */ 71