1 /* 2 * QEMU System Emulator 3 * 4 * Copyright (c) 2003-2008 Fabrice Bellard 5 * Copyright (c) 2011-2015 Red Hat Inc 6 * 7 * Authors: 8 * Juan Quintela <quintela@redhat.com> 9 * 10 * Permission is hereby granted, free of charge, to any person obtaining a copy 11 * of this software and associated documentation files (the "Software"), to deal 12 * in the Software without restriction, including without limitation the rights 13 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 14 * copies of the Software, and to permit persons to whom the Software is 15 * furnished to do so, subject to the following conditions: 16 * 17 * The above copyright notice and this permission notice shall be included in 18 * all copies or substantial portions of the Software. 19 * 20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 23 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 24 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 25 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 26 * THE SOFTWARE. 27 */ 28 29 #ifndef QEMU_MIGRATION_COMPRESS_H 30 #define QEMU_MIGRATION_COMPRESS_H 31 32 #include "qemu-file.h" 33 34 enum CompressResult { 35 RES_NONE = 0, 36 RES_ZEROPAGE = 1, 37 RES_COMPRESS = 2 38 }; 39 typedef enum CompressResult CompressResult; 40 41 struct CompressParam { 42 bool done; 43 bool quit; 44 bool trigger; 45 CompressResult result; 46 QEMUFile *file; 47 QemuMutex mutex; 48 QemuCond cond; 49 RAMBlock *block; 50 ram_addr_t offset; 51 52 /* internally used fields */ 53 z_stream stream; 54 uint8_t *originbuf; 55 }; 56 typedef struct CompressParam CompressParam; 57 58 void compress_threads_save_cleanup(void); 59 int compress_threads_save_setup(void); 60 61 void flush_compressed_data(int (send_queued_data(CompressParam *))); 62 int compress_page_with_multi_thread(RAMBlock *block, ram_addr_t offset, 63 int (send_queued_data(CompressParam *))); 64 65 int wait_for_decompress_done(void); 66 void compress_threads_load_cleanup(void); 67 int compress_threads_load_setup(QEMUFile *f); 68 void decompress_data_with_multi_threads(QEMUFile *f, void *host, int len); 69 70 #endif 71