1 /* 2 * Copyright (c) 2021-2021 Huawei Device Co., Ltd. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without modification, 5 * are permitted provided that the following conditions are met: 6 * 7 * 1. Redistributions of source code must retain the above copyright notice, this list of 8 * conditions and the following disclaimer. 9 * 10 * 2. Redistributions in binary form must reproduce the above copyright notice, this list 11 * of conditions and the following disclaimer in the documentation and/or other materials 12 * provided with the distribution. 13 * 14 * 3. Neither the name of the copyright holder nor the names of its contributors may be used 15 * to endorse or promote products derived from this software without specific prior written 16 * permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 20 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 22 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 23 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 24 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 25 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 26 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 27 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 28 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef _FBMEM_H 32 #define _FBMEM_H 33 34 #include <stdint.h> 35 #include "sys/types.h" 36 #include "sys/stat.h" 37 #include "bits/errno.h" 38 #include "los_list.h" 39 #include "los_interrupt.h" 40 #include "los_debug.h" 41 #include "los_task.h" 42 43 #define PATH_MAX 256 44 #define V_CREATE (1 << 0) 45 #define V_DUMMY (1 << 2) 46 47 #ifndef OK 48 #define OK 0 49 #endif 50 51 struct fb_mem { 52 uint32_t hash; /* vnode hash */ 53 uint uid; /* uid for dac */ 54 void *data; /* private data */ 55 }; 56 57 int FbMemInit(void); 58 int FbMemHold(void); 59 int FbMemDrop(void); 60 int FbMemLookup(const char *key, struct fb_mem **result, uint32_t flags); 61 int register_driver(const char *key, void *prev); 62 int unregister_driver(const char *key); 63 64 #endif