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1 | /* |
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2 | * (C) GraÅžvydas "notaz" Ignotas, 2008-2012 |
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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. |
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8 | * - MAME license. |
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9 | * See the COPYING file in the top-level directory. |
10 | */ |
11 | |
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12 | #define _GNU_SOURCE 1 |
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13 | #include <stdio.h> |
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14 | #include <string.h> |
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15 | #include <stdarg.h> |
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16 | #include <dirent.h> |
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17 | #include <sys/time.h> |
18 | #include <time.h> |
19 | #include <unistd.h> |
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20 | #include <sys/mman.h> |
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21 | #include <errno.h> |
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22 | |
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23 | #include "../plat.h" |
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24 | |
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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 | |
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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 | |
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43 | int plat_get_root_dir(char *dst, int len) |
44 | { |
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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; |
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53 | |
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54 | for (j = strlen(dst); j > 0; j--) |
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55 | if (dst[j] == '/') { |
56 | dst[++j] = 0; |
57 | break; |
58 | } |
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59 | |
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60 | return j; |
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61 | } |
62 | |
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63 | #ifdef __GP2X__ |
64 | /* Wiz has a borked gettimeofday().. */ |
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65 | #define plat_get_ticks_ms plat_get_ticks_ms_good |
66 | #define plat_get_ticks_us plat_get_ticks_us_good |
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67 | #endif |
68 | |
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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; |
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77 | /* approximate /= 1000 */ |
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78 | ret += ((unsigned)tv.tv_usec * 4195) >> 22; |
79 | |
80 | return ret; |
81 | } |
82 | |
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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 | |
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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 | |
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138 | void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed) |
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139 | { |
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140 | static int hugetlb_warned; |
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141 | int prot = PROT_READ | PROT_WRITE; |
142 | int flags = MAP_PRIVATE | MAP_ANONYMOUS; |
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143 | void *req, *ret; |
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144 | |
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145 | req = (void *)addr; |
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146 | if (need_exec) |
147 | prot |= PROT_EXEC; |
148 | if (is_fixed) |
149 | flags |= MAP_FIXED; |
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150 | if (size >= HUGETLB_THRESHOLD) |
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151 | flags |= MAP_HUGETLB; |
152 | |
153 | ret = mmap(req, size, prot, flags, -1, 0); |
154 | if (ret == MAP_FAILED && (flags & MAP_HUGETLB)) { |
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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 | } |
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161 | flags &= ~MAP_HUGETLB; |
162 | ret = mmap(req, size, prot, flags, -1, 0); |
163 | } |
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164 | if (ret == MAP_FAILED) |
165 | return NULL; |
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166 | |
167 | if (req != NULL && ret != req) |
168 | fprintf(stderr, |
169 | "warning: mmaped to %p, requested %p\n", ret, req); |
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170 | |
171 | return ret; |
172 | } |
173 | |
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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 | |
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187 | void plat_munmap(void *ptr, size_t size) |
188 | { |
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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 | } |
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201 | } |
202 | |
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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 | |