Differences From Artifact [531ff2d312]:
- File src/objc_sync.m — part of check-in [de63989ad8] at 2009-05-24 19:31:13 on branch trunk — Implement objc_sync_enter and objc_sync_exit if they're missing. (user: js, size: 4647) [annotate] [blame] [check-ins using]
To Artifact [9f958f8552]:
- File
src/objc_sync.m
— part of check-in
[5337be0924]
at
2009-05-25 17:00:32
on branch trunk
— Improve objc_sync.m.
* Use inline functions to improve code readability.
* Fix a wrong lock.
* Initialize it in +[initialize] of OFObject. (user: js, size: 4157) [annotate] [blame] [check-ins using]
︙ | ︙ | |||
12 13 14 15 16 17 18 | #include "config.h" #include <stddef.h> #include <stdlib.h> #ifndef _WIN32 #include <pthread.h> | | > > > > > > < > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > < < < < < | < < < < < | < < < < | < < < < | < < < < | | < < < < < < < < | < < < < | < < < < | < < < < < | | | | | < < < < < < < < < | < < < > > | | < < < < < | > | < < < < < < < < < < < < | | < < < < < < < | | < < < < < < < | < < < < | < < < < | < < < < | 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 | #include "config.h" #include <stddef.h> #include <stdlib.h> #ifndef _WIN32 #include <pthread.h> #endif #import <objc/objc.h> #ifdef _WIN32 #include <windows.h> #endif #import "OFMacros.h" struct locks_s { id obj; size_t count; size_t recursion; #ifndef _WIN32 pthread_t thread; pthread_mutex_t mutex; #else HANDLE thread; HANDLE mutex; #endif }; #ifndef _WIN32 static pthread_mutex_t mutex; #else static HANDLE mutex; #endif static struct locks_s *locks = NULL; static size_t num_locks = 0; #ifndef _WIN32 static OF_INLINE BOOL mutex_new(pthread_mutex_t *m) { return (pthread_mutex_init(m, NULL) ? NO : YES); } static OF_INLINE BOOL mutex_free(pthread_mutex_t *m) { return (pthread_mutex_destroy(m) ? NO : YES); } static OF_INLINE BOOL mutex_lock(pthread_mutex_t *m) { return (pthread_mutex_lock(m) ? NO : YES); } static OF_INLINE BOOL mutex_unlock(pthread_mutex_t *m) { return (pthread_mutex_unlock(m) ? NO : YES); } static OF_INLINE BOOL thread_is_current(pthread_t t) { return (pthread_equal(t, pthread_self()) ? YES : NO); } static OF_INLINE pthread_t thread_current() { return pthread_self(); } #else static OF_INLINE BOOL mutex_new(HANDLE *m) { return (((*m = CreateMutex(NULL, FALSE, NULL)) != NULL) ? YES : NO); } static OF_INLINE BOOL mutex_free(HANDLE *m) { return (CloseHandle(*m) ? YES : NO); } static OF_INLINE BOOL mutex_lock(HANDLE *m) { return (WaitForSingleObject(*m, INFINITE) == WAIT_OBJECT_0 ? YES : NO); } static OF_INLINE BOOL mutex_unlock(HANDLE *m) { return (ReleaseMutex(*m) ? YES : NO); } static OF_INLINE BOOL thread_is_current(HANDLE t) { return (t == GetCurrentThread() ? YES : NO); } static OF_INLINE HANDLE thread_current() { return GetCurrentThread(); } #endif BOOL objc_sync_init() { return (mutex_new(&mutex) ? YES : NO); } int objc_sync_enter(id obj) { size_t i; if (obj == nil) return 0; if (!mutex_lock(&mutex)) return 1; for (i = 0; i < num_locks; i++) { if (locks[i].obj == obj) { if (thread_is_current(locks[i].thread)) locks[i].recursion++; else if (!mutex_lock(&locks[i].mutex)) { mutex_unlock(&mutex); return 1; } locks[i].count++; if (!mutex_unlock(&mutex)) return 1; return 0; } } if (locks == NULL) { if ((locks = malloc(sizeof(struct locks_s))) == NULL) { mutex_unlock(&mutex); return 1; } } else { struct locks_s *new_locks; if ((new_locks = realloc(locks, (num_locks + 1) * sizeof(struct locks_s))) == NULL) { mutex_unlock(&mutex); return 1; } locks = new_locks; } locks[num_locks].obj = obj; locks[num_locks].count = 1; locks[num_locks].recursion = 0; locks[num_locks].thread = thread_current(); if (!mutex_new(&locks[num_locks].mutex)) { mutex_unlock(&mutex); return 1; } if (!mutex_lock(&locks[num_locks].mutex)) { mutex_unlock(&mutex); return 1; } num_locks++; if (!mutex_unlock(&mutex)) return 1; return 0; } int objc_sync_exit(id obj) { size_t i; if (obj == nil) return 0; if (!mutex_lock(&mutex)) return 1; for (i = 0; i < num_locks; i++) { if (locks[i].obj == obj) { if (locks[i].recursion > 0 && thread_is_current(locks[i].thread)) { locks[i].recursion--; if (!mutex_unlock(&mutex)) return 1; return 0; } if (!mutex_unlock(&locks[i].mutex)) { mutex_unlock(&mutex); return 1; } locks[i].count--; if (locks[i].count == 0) { struct locks_s *new_locks; if (!mutex_free(&locks[i].mutex)) { mutex_unlock(&mutex); return 1; } num_locks--; locks[i] = locks[num_locks]; if ((new_locks = realloc(locks, (num_locks) * sizeof(struct locks_s))) == NULL) { mutex_unlock(&mutex); return 1; } locks = new_locks; } if (!mutex_unlock(&mutex)) return 1; return 0; } } mutex_unlock(&mutex); return 1; } |