| 1 | /* |
| 2 | * (C) GraÅžvydas "notaz" Ignotas, 2008-2012 |
| 3 | * |
| 4 | * This work is licensed under the terms of any of these licenses |
| 5 | * (at your option): |
| 6 | * - GNU GPL, version 2 or later. |
| 7 | * - GNU LGPL, version 2.1 or later. |
| 8 | * - MAME license. |
| 9 | * See the COPYING file in the top-level directory. |
| 10 | */ |
| 11 | |
| 12 | #define _GNU_SOURCE 1 |
| 13 | #include <stdio.h> |
| 14 | #include <string.h> |
| 15 | #include <stdarg.h> |
| 16 | #include <dirent.h> |
| 17 | #include <sys/time.h> |
| 18 | #include <time.h> |
| 19 | #include <unistd.h> |
| 20 | #include <sys/mman.h> |
| 21 | #include <errno.h> |
| 22 | |
| 23 | #include "../plat.h" |
| 24 | |
| 25 | /* XXX: maybe unhardcode pagesize? */ |
| 26 | #define HUGETLB_PAGESIZE (2 * 1024 * 1024) |
| 27 | #define HUGETLB_THRESHOLD (HUGETLB_PAGESIZE / 2) |
| 28 | #ifndef MAP_HUGETLB |
| 29 | #define MAP_HUGETLB 0x40000 /* arch specific */ |
| 30 | #endif |
| 31 | |
| 32 | |
| 33 | int plat_is_dir(const char *path) |
| 34 | { |
| 35 | DIR *dir; |
| 36 | if ((dir = opendir(path))) { |
| 37 | closedir(dir); |
| 38 | return 1; |
| 39 | } |
| 40 | return 0; |
| 41 | } |
| 42 | |
| 43 | int plat_get_root_dir(char *dst, int len) |
| 44 | { |
| 45 | int j, ret; |
| 46 | |
| 47 | ret = readlink("/proc/self/exe", dst, len - 1); |
| 48 | if (ret < 0) { |
| 49 | perror("readlink"); |
| 50 | ret = 0; |
| 51 | } |
| 52 | dst[ret] = 0; |
| 53 | |
| 54 | for (j = strlen(dst); j > 0; j--) |
| 55 | if (dst[j] == '/') { |
| 56 | dst[++j] = 0; |
| 57 | break; |
| 58 | } |
| 59 | |
| 60 | return j; |
| 61 | } |
| 62 | |
| 63 | #ifdef __GP2X__ |
| 64 | /* Wiz has a borked gettimeofday().. */ |
| 65 | #define plat_get_ticks_ms plat_get_ticks_ms_good |
| 66 | #define plat_get_ticks_us plat_get_ticks_us_good |
| 67 | #endif |
| 68 | |
| 69 | unsigned int plat_get_ticks_ms(void) |
| 70 | { |
| 71 | struct timeval tv; |
| 72 | unsigned int ret; |
| 73 | |
| 74 | gettimeofday(&tv, NULL); |
| 75 | |
| 76 | ret = (unsigned)tv.tv_sec * 1000; |
| 77 | /* approximate /= 1000 */ |
| 78 | ret += ((unsigned)tv.tv_usec * 4195) >> 22; |
| 79 | |
| 80 | return ret; |
| 81 | } |
| 82 | |
| 83 | unsigned int plat_get_ticks_us(void) |
| 84 | { |
| 85 | struct timeval tv; |
| 86 | unsigned int ret; |
| 87 | |
| 88 | gettimeofday(&tv, NULL); |
| 89 | |
| 90 | ret = (unsigned)tv.tv_sec * 1000000; |
| 91 | ret += (unsigned)tv.tv_usec; |
| 92 | |
| 93 | return ret; |
| 94 | } |
| 95 | |
| 96 | void plat_sleep_ms(int ms) |
| 97 | { |
| 98 | usleep(ms * 1000); |
| 99 | } |
| 100 | |
| 101 | int plat_wait_event(int *fds_hnds, int count, int timeout_ms) |
| 102 | { |
| 103 | struct timeval tv, *timeout = NULL; |
| 104 | int i, ret, fdmax = -1; |
| 105 | fd_set fdset; |
| 106 | |
| 107 | if (timeout_ms >= 0) { |
| 108 | tv.tv_sec = timeout_ms / 1000; |
| 109 | tv.tv_usec = (timeout_ms % 1000) * 1000; |
| 110 | timeout = &tv; |
| 111 | } |
| 112 | |
| 113 | FD_ZERO(&fdset); |
| 114 | for (i = 0; i < count; i++) { |
| 115 | if (fds_hnds[i] > fdmax) fdmax = fds_hnds[i]; |
| 116 | FD_SET(fds_hnds[i], &fdset); |
| 117 | } |
| 118 | |
| 119 | ret = select(fdmax + 1, &fdset, NULL, NULL, timeout); |
| 120 | if (ret == -1) |
| 121 | { |
| 122 | perror("plat_wait_event: select failed"); |
| 123 | sleep(1); |
| 124 | return -1; |
| 125 | } |
| 126 | |
| 127 | if (ret == 0) |
| 128 | return -1; /* timeout */ |
| 129 | |
| 130 | ret = -1; |
| 131 | for (i = 0; i < count; i++) |
| 132 | if (FD_ISSET(fds_hnds[i], &fdset)) |
| 133 | ret = fds_hnds[i]; |
| 134 | |
| 135 | return ret; |
| 136 | } |
| 137 | |
| 138 | void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed) |
| 139 | { |
| 140 | static int hugetlb_warned; |
| 141 | int prot = PROT_READ | PROT_WRITE; |
| 142 | int flags = MAP_PRIVATE | MAP_ANONYMOUS; |
| 143 | void *req, *ret; |
| 144 | |
| 145 | req = (void *)addr; |
| 146 | if (need_exec) |
| 147 | prot |= PROT_EXEC; |
| 148 | if (is_fixed) |
| 149 | flags |= MAP_FIXED; |
| 150 | if (size >= HUGETLB_THRESHOLD) |
| 151 | flags |= MAP_HUGETLB; |
| 152 | |
| 153 | ret = mmap(req, size, prot, flags, -1, 0); |
| 154 | if (ret == MAP_FAILED && (flags & MAP_HUGETLB)) { |
| 155 | if (!hugetlb_warned) { |
| 156 | fprintf(stderr, |
| 157 | "warning: failed to do hugetlb mmap (%p, %zu): %d\n", |
| 158 | req, size, errno); |
| 159 | hugetlb_warned = 1; |
| 160 | } |
| 161 | flags &= ~MAP_HUGETLB; |
| 162 | ret = mmap(req, size, prot, flags, -1, 0); |
| 163 | } |
| 164 | if (ret == MAP_FAILED) |
| 165 | return NULL; |
| 166 | |
| 167 | if (req != NULL && ret != req) |
| 168 | fprintf(stderr, |
| 169 | "warning: mmaped to %p, requested %p\n", ret, req); |
| 170 | |
| 171 | return ret; |
| 172 | } |
| 173 | |
| 174 | void *plat_mremap(void *ptr, size_t oldsize, size_t newsize) |
| 175 | { |
| 176 | void *ret; |
| 177 | |
| 178 | ret = mremap(ptr, oldsize, newsize, MREMAP_MAYMOVE); |
| 179 | if (ret == MAP_FAILED) |
| 180 | return NULL; |
| 181 | if (ret != ptr) |
| 182 | printf("warning: mremap moved: %p -> %p\n", ptr, ret); |
| 183 | |
| 184 | return ret; |
| 185 | } |
| 186 | |
| 187 | void plat_munmap(void *ptr, size_t size) |
| 188 | { |
| 189 | int ret; |
| 190 | |
| 191 | ret = munmap(ptr, size); |
| 192 | if (ret != 0 && (size & (HUGETLB_PAGESIZE - 1))) { |
| 193 | // prehaps an autorounded hugetlb mapping? |
| 194 | size = (size + HUGETLB_PAGESIZE - 1) & ~(HUGETLB_PAGESIZE - 1); |
| 195 | ret = munmap(ptr, size); |
| 196 | } |
| 197 | if (ret != 0) { |
| 198 | fprintf(stderr, |
| 199 | "munmap(%p, %zu) failed: %d\n", ptr, size, errno); |
| 200 | } |
| 201 | } |
| 202 | |
| 203 | /* lprintf */ |
| 204 | void lprintf(const char *fmt, ...) |
| 205 | { |
| 206 | va_list vl; |
| 207 | |
| 208 | va_start(vl, fmt); |
| 209 | vprintf(fmt, vl); |
| 210 | va_end(vl); |
| 211 | } |
| 212 | |