1 /* 2 * libwebsockets - small server side websockets and web server implementation 3 * 4 * Copyright (C) 2010 - 2020 Andy Green <andy@warmcat.com> 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 8 * deal in the Software without restriction, including without limitation the 9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or 10 * sell 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 THE 19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 22 * IN THE SOFTWARE. 23 */ 24 25 #if !defined(__LWS_PRIVATE_LIB_MISC_LWSAC_H__) 26 #define __LWS_PRIVATE_LIB_MISC_LWSAC_H__ 27 28 #if !defined(LWS_PLAT_OPTEE) 29 #include <sys/stat.h> 30 #endif 31 32 /* under page size of 4096 to allow overhead */ 33 #define LWSAC_CHUNK_SIZE 4000 34 35 /* 36 * the chunk list members all point back to the head themselves so the list 37 * can be detached from the formal head and free itself when its reference 38 * count reaches zero. 39 */ 40 41 /* 42 * One of these per chunk 43 */ 44 45 struct lwsac { 46 struct lwsac *next; 47 struct lwsac *head; /* pointer back to the first chunk */ 48 size_t alloc_size; /* alloc size of the whole chunk */ 49 size_t ofs; /* next writeable position inside chunk */ 50 }; 51 52 /* 53 * One of these per lwsac, at start of first chunk 54 */ 55 56 struct lwsac_head { 57 struct lwsac *curr; 58 size_t total_alloc_size; 59 int refcount; 60 int total_blocks; 61 char detached; /* if our refcount gets to zero, free the chunk list */ 62 }; 63 64 #if !defined(LWS_PLAT_OPTEE) 65 struct cached_file_info { 66 struct stat s; 67 time_t last_confirm; 68 }; 69 #endif 70 #endif 71