| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Copyright (C) 2005 Aurelien Jacobs <aurel@gnuage.org> | ||
| 3 | * Copyright (C) 2009, 2026 Ramiro Polla <ramiro.polla@gmail.com> | ||
| 4 | * | ||
| 5 | * This file is part of FFmpeg. | ||
| 6 | * | ||
| 7 | * FFmpeg is free software; you can redistribute it and/or | ||
| 8 | * modify it under the terms of the GNU Lesser General Public | ||
| 9 | * License as published by the Free Software Foundation; either | ||
| 10 | * version 2.1 of the License, or (at your option) any later version. | ||
| 11 | * | ||
| 12 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 15 | * Lesser General Public License for more details. | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU Lesser General Public | ||
| 18 | * License along with FFmpeg; if not, write to the Free Software | ||
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 20 | */ | ||
| 21 | |||
| 22 | #include "config.h" | ||
| 23 | |||
| 24 | #include "libavutil/error.h" | ||
| 25 | |||
| 26 | #include "jit.h" | ||
| 27 | |||
| 28 | #if HAVE_MMAP && HAVE_MPROTECT | ||
| 29 | # define _DEFAULT_SOURCE | ||
| 30 | # define _SVID_SOURCE // needed for MAP_ANONYMOUS | ||
| 31 | # define _DARWIN_C_SOURCE // needed for MAP_ANON | ||
| 32 | # include <sys/mman.h> | ||
| 33 | # if defined(MAP_ANON) && !defined(MAP_ANONYMOUS) | ||
| 34 | # define MAP_ANONYMOUS MAP_ANON | ||
| 35 | # endif | ||
| 36 | #endif | ||
| 37 | |||
| 38 | #if HAVE_MMAP && HAVE_MPROTECT && defined(MAP_ANONYMOUS) | ||
| 39 | |||
| 40 | ✗ | void *ff_sws_jit_alloc(size_t size) | |
| 41 | { | ||
| 42 | ✗ | void *ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, | |
| 43 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); | ||
| 44 | ✗ | if (ptr == MAP_FAILED) | |
| 45 | ✗ | return NULL; | |
| 46 | ✗ | return ptr; | |
| 47 | } | ||
| 48 | |||
| 49 | ✗ | int ff_sws_jit_protect(void *ptr, size_t size) | |
| 50 | { | ||
| 51 | ✗ | if (mprotect(ptr, size, PROT_READ | PROT_EXEC) == -1) | |
| 52 | ✗ | return AVERROR(errno); | |
| 53 | ✗ | return 0; | |
| 54 | } | ||
| 55 | |||
| 56 | 178266 | void ff_sws_jit_free(void *ptr, size_t size) | |
| 57 | { | ||
| 58 |
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178266 | if (ptr) |
| 59 | ✗ | munmap(ptr, size); | |
| 60 | 178266 | } | |
| 61 | |||
| 62 | #elif HAVE_VIRTUALALLOC | ||
| 63 | |||
| 64 | #include <windows.h> | ||
| 65 | |||
| 66 | void *ff_sws_jit_alloc(size_t size) | ||
| 67 | { | ||
| 68 | return VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE); | ||
| 69 | } | ||
| 70 | |||
| 71 | int ff_sws_jit_protect(void *ptr, size_t size) | ||
| 72 | { | ||
| 73 | DWORD old_protect; | ||
| 74 | if (!VirtualProtect(ptr, size, PAGE_EXECUTE_READ, &old_protect)) | ||
| 75 | return AVERROR(EINVAL); | ||
| 76 | return 0; | ||
| 77 | } | ||
| 78 | |||
| 79 | void ff_sws_jit_free(void *ptr, size_t size) | ||
| 80 | { | ||
| 81 | if (ptr) | ||
| 82 | VirtualFree(ptr, 0, MEM_RELEASE); | ||
| 83 | } | ||
| 84 | |||
| 85 | #else | ||
| 86 | |||
| 87 | #include "libavutil/mem.h" | ||
| 88 | |||
| 89 | void *ff_sws_jit_alloc(size_t size) | ||
| 90 | { | ||
| 91 | return av_malloc(size); | ||
| 92 | } | ||
| 93 | |||
| 94 | int ff_sws_jit_protect(void *ptr, size_t size) | ||
| 95 | { | ||
| 96 | return 0; | ||
| 97 | } | ||
| 98 | |||
| 99 | void ff_sws_jit_free(void *ptr, size_t size) | ||
| 100 | { | ||
| 101 | av_free(ptr); | ||
| 102 | } | ||
| 103 | |||
| 104 | #endif | ||
| 105 |