Commit | Line | Data |
---|---|---|
07739b57 JA |
1 | #include <stdio.h> |
2 | #include <string.h> | |
3 | #include <unistd.h> | |
4 | #include <stdlib.h> | |
5 | #include <fcntl.h> | |
656b1393 | 6 | #include <time.h> |
ef635057 | 7 | #include <errno.h> |
07739b57 JA |
8 | #include <pthread.h> |
9 | #include <sys/mman.h> | |
8b4e954c | 10 | #include <assert.h> |
07739b57 | 11 | |
b4c1fb36 | 12 | #include "fio.h" |
4fa6d0f8 | 13 | #include "log.h" |
07739b57 | 14 | #include "mutex.h" |
4d4e80f2 | 15 | #include "arch/arch.h" |
3c2d93ed | 16 | #include "os/os.h" |
3b2e1464 | 17 | #include "helpers.h" |
ef3c94b6 | 18 | #include "fio_time.h" |
ef635057 | 19 | #include "gettime.h" |
07739b57 | 20 | |
f5a42524 | 21 | void __fio_mutex_remove(struct fio_mutex *mutex) |
07739b57 | 22 | { |
8f801ad5 | 23 | assert(mutex->magic == FIO_MUTEX_MAGIC); |
58a157d4 | 24 | pthread_cond_destroy(&mutex->cond); |
f5a42524 JA |
25 | } |
26 | ||
27 | void fio_mutex_remove(struct fio_mutex *mutex) | |
28 | { | |
29 | __fio_mutex_remove(mutex); | |
5921e80c | 30 | munmap((void *) mutex, sizeof(*mutex)); |
07739b57 JA |
31 | } |
32 | ||
72242057 | 33 | int __fio_mutex_init(struct fio_mutex *mutex, int value) |
07739b57 JA |
34 | { |
35 | pthread_mutexattr_t attr; | |
108fcc11 | 36 | pthread_condattr_t cond; |
e721c57f | 37 | int ret; |
07739b57 | 38 | |
cdd18ad8 | 39 | mutex->value = value; |
8b4e954c | 40 | mutex->magic = FIO_MUTEX_MAGIC; |
07739b57 | 41 | |
4fa6d0f8 JA |
42 | ret = pthread_mutexattr_init(&attr); |
43 | if (ret) { | |
44 | log_err("pthread_mutexattr_init: %s\n", strerror(ret)); | |
72242057 | 45 | return ret; |
07739b57 | 46 | } |
e721c57f JA |
47 | |
48 | /* | |
49 | * Not all platforms support process shared mutexes (FreeBSD) | |
50 | */ | |
7452440e | 51 | #ifdef FIO_HAVE_PSHARED_MUTEX |
e721c57f | 52 | ret = pthread_mutexattr_setpshared(&attr, PTHREAD_PROCESS_SHARED); |
4fa6d0f8 JA |
53 | if (ret) { |
54 | log_err("pthread_mutexattr_setpshared: %s\n", strerror(ret)); | |
72242057 | 55 | return ret; |
07739b57 | 56 | } |
7452440e | 57 | #endif |
108fcc11 ZY |
58 | |
59 | pthread_condattr_init(&cond); | |
7452440e | 60 | #ifdef FIO_HAVE_PSHARED_MUTEX |
e721c57f | 61 | pthread_condattr_setpshared(&cond, PTHREAD_PROCESS_SHARED); |
ceab2ea2 | 62 | #endif |
58a157d4 | 63 | pthread_cond_init(&mutex->cond, &cond); |
108fcc11 | 64 | |
4fa6d0f8 JA |
65 | ret = pthread_mutex_init(&mutex->lock, &attr); |
66 | if (ret) { | |
67 | log_err("pthread_mutex_init: %s\n", strerror(ret)); | |
72242057 | 68 | return ret; |
07739b57 JA |
69 | } |
70 | ||
03e20d68 BC |
71 | pthread_condattr_destroy(&cond); |
72 | pthread_mutexattr_destroy(&attr); | |
72242057 JA |
73 | return 0; |
74 | } | |
75 | ||
76 | struct fio_mutex *fio_mutex_init(int value) | |
77 | { | |
78 | struct fio_mutex *mutex = NULL; | |
79 | ||
80 | mutex = (void *) mmap(NULL, sizeof(struct fio_mutex), | |
81 | PROT_READ | PROT_WRITE, | |
82 | OS_MAP_ANON | MAP_SHARED, -1, 0); | |
83 | if (mutex == MAP_FAILED) { | |
84 | perror("mmap mutex"); | |
85 | return NULL; | |
86 | } | |
03e20d68 | 87 | |
72242057 JA |
88 | if (!__fio_mutex_init(mutex, value)) |
89 | return mutex; | |
f7c9e00e | 90 | |
72242057 | 91 | fio_mutex_remove(mutex); |
07739b57 JA |
92 | return NULL; |
93 | } | |
94 | ||
09400a60 | 95 | static bool mutex_timed_out(struct timeval *t, unsigned int msecs) |
ef635057 | 96 | { |
09400a60 JA |
97 | struct timeval now; |
98 | ||
99 | gettimeofday(&now, NULL); | |
100 | return mtime_since(t, &now) >= msecs; | |
ef635057 JA |
101 | } |
102 | ||
09400a60 | 103 | int fio_mutex_down_timeout(struct fio_mutex *mutex, unsigned int msecs) |
656b1393 | 104 | { |
ef635057 | 105 | struct timeval tv_s; |
656b1393 JA |
106 | struct timespec t; |
107 | int ret = 0; | |
108 | ||
8f801ad5 | 109 | assert(mutex->magic == FIO_MUTEX_MAGIC); |
8b4e954c | 110 | |
b11e4ccf | 111 | gettimeofday(&tv_s, NULL); |
09400a60 | 112 | t.tv_sec = tv_s.tv_sec; |
b11e4ccf | 113 | t.tv_nsec = tv_s.tv_usec * 1000; |
656b1393 | 114 | |
09400a60 JA |
115 | t.tv_sec += msecs / 1000; |
116 | t.tv_nsec += ((msecs * 1000000) % 1000000000); | |
117 | if (t.tv_nsec >= 1000000000) { | |
118 | t.tv_nsec -= 1000000000; | |
119 | t.tv_sec++; | |
120 | } | |
121 | ||
656b1393 JA |
122 | pthread_mutex_lock(&mutex->lock); |
123 | ||
09400a60 | 124 | mutex->waiters++; |
656b1393 | 125 | while (!mutex->value && !ret) { |
ef635057 JA |
126 | /* |
127 | * Some platforms (FreeBSD 9?) seems to return timed out | |
128 | * way too early, double check. | |
129 | */ | |
656b1393 | 130 | ret = pthread_cond_timedwait(&mutex->cond, &mutex->lock, &t); |
09400a60 | 131 | if (ret == ETIMEDOUT && !mutex_timed_out(&tv_s, msecs)) |
ef635057 | 132 | ret = 0; |
656b1393 | 133 | } |
09400a60 | 134 | mutex->waiters--; |
656b1393 JA |
135 | |
136 | if (!ret) { | |
137 | mutex->value--; | |
138 | pthread_mutex_unlock(&mutex->lock); | |
42e833fa | 139 | return 0; |
656b1393 JA |
140 | } |
141 | ||
09400a60 | 142 | pthread_mutex_unlock(&mutex->lock); |
656b1393 JA |
143 | return ret; |
144 | } | |
145 | ||
66608372 | 146 | bool fio_mutex_down_trylock(struct fio_mutex *mutex) |
72242057 | 147 | { |
66608372 | 148 | bool ret = true; |
72242057 JA |
149 | |
150 | assert(mutex->magic == FIO_MUTEX_MAGIC); | |
151 | ||
152 | pthread_mutex_lock(&mutex->lock); | |
153 | if (mutex->value) { | |
154 | mutex->value--; | |
66608372 | 155 | ret = false; |
72242057 JA |
156 | } |
157 | pthread_mutex_unlock(&mutex->lock); | |
158 | ||
159 | return ret; | |
160 | } | |
161 | ||
cdd18ad8 | 162 | void fio_mutex_down(struct fio_mutex *mutex) |
07739b57 | 163 | { |
8f801ad5 | 164 | assert(mutex->magic == FIO_MUTEX_MAGIC); |
8b4e954c | 165 | |
cdd18ad8 | 166 | pthread_mutex_lock(&mutex->lock); |
4d4e80f2 JA |
167 | |
168 | while (!mutex->value) { | |
169 | mutex->waiters++; | |
cdd18ad8 | 170 | pthread_cond_wait(&mutex->cond, &mutex->lock); |
4d4e80f2 JA |
171 | mutex->waiters--; |
172 | } | |
173 | ||
cdd18ad8 JA |
174 | mutex->value--; |
175 | pthread_mutex_unlock(&mutex->lock); | |
07739b57 JA |
176 | } |
177 | ||
cdd18ad8 | 178 | void fio_mutex_up(struct fio_mutex *mutex) |
07739b57 | 179 | { |
6899b6cb JA |
180 | int do_wake = 0; |
181 | ||
8f801ad5 | 182 | assert(mutex->magic == FIO_MUTEX_MAGIC); |
8b4e954c | 183 | |
cdd18ad8 | 184 | pthread_mutex_lock(&mutex->lock); |
4d4e80f2 JA |
185 | read_barrier(); |
186 | if (!mutex->value && mutex->waiters) | |
6899b6cb | 187 | do_wake = 1; |
cdd18ad8 JA |
188 | mutex->value++; |
189 | pthread_mutex_unlock(&mutex->lock); | |
6899b6cb JA |
190 | |
191 | if (do_wake) | |
192 | pthread_cond_signal(&mutex->cond); | |
07739b57 | 193 | } |
64d4d313 | 194 | |
d7df1d13 | 195 | void fio_rwlock_write(struct fio_rwlock *lock) |
64d4d313 | 196 | { |
8f801ad5 | 197 | assert(lock->magic == FIO_RWLOCK_MAGIC); |
d7df1d13 | 198 | pthread_rwlock_wrlock(&lock->lock); |
64d4d313 JA |
199 | } |
200 | ||
d7df1d13 | 201 | void fio_rwlock_read(struct fio_rwlock *lock) |
64d4d313 | 202 | { |
8f801ad5 | 203 | assert(lock->magic == FIO_RWLOCK_MAGIC); |
d7df1d13 JA |
204 | pthread_rwlock_rdlock(&lock->lock); |
205 | } | |
4d4e80f2 | 206 | |
d7df1d13 JA |
207 | void fio_rwlock_unlock(struct fio_rwlock *lock) |
208 | { | |
8f801ad5 | 209 | assert(lock->magic == FIO_RWLOCK_MAGIC); |
d7df1d13 | 210 | pthread_rwlock_unlock(&lock->lock); |
64d4d313 JA |
211 | } |
212 | ||
d7df1d13 | 213 | void fio_rwlock_remove(struct fio_rwlock *lock) |
64d4d313 | 214 | { |
8f801ad5 | 215 | assert(lock->magic == FIO_RWLOCK_MAGIC); |
d7df1d13 | 216 | munmap((void *) lock, sizeof(*lock)); |
64d4d313 JA |
217 | } |
218 | ||
d7df1d13 | 219 | struct fio_rwlock *fio_rwlock_init(void) |
64d4d313 | 220 | { |
d7df1d13 | 221 | struct fio_rwlock *lock; |
33980f5d | 222 | pthread_rwlockattr_t attr; |
d7df1d13 JA |
223 | int ret; |
224 | ||
225 | lock = (void *) mmap(NULL, sizeof(struct fio_rwlock), | |
226 | PROT_READ | PROT_WRITE, | |
227 | OS_MAP_ANON | MAP_SHARED, -1, 0); | |
228 | if (lock == MAP_FAILED) { | |
229 | perror("mmap rwlock"); | |
230 | lock = NULL; | |
231 | goto err; | |
232 | } | |
233 | ||
8b4e954c JA |
234 | lock->magic = FIO_RWLOCK_MAGIC; |
235 | ||
33980f5d | 236 | ret = pthread_rwlockattr_init(&attr); |
d7df1d13 | 237 | if (ret) { |
cdb57fe2 | 238 | log_err("pthread_rwlockattr_init: %s\n", strerror(ret)); |
d7df1d13 JA |
239 | goto err; |
240 | } | |
33980f5d SL |
241 | #ifdef FIO_HAVE_PSHARED_MUTEX |
242 | ret = pthread_rwlockattr_setpshared(&attr, PTHREAD_PROCESS_SHARED); | |
243 | if (ret) { | |
cdb57fe2 | 244 | log_err("pthread_rwlockattr_setpshared: %s\n", strerror(ret)); |
33980f5d SL |
245 | goto destroy_attr; |
246 | } | |
33980f5d SL |
247 | |
248 | ret = pthread_rwlock_init(&lock->lock, &attr); | |
09f17d62 BC |
249 | #else |
250 | ret = pthread_rwlock_init(&lock->lock, NULL); | |
251 | #endif | |
252 | ||
33980f5d SL |
253 | if (ret) { |
254 | log_err("pthread_rwlock_init: %s\n", strerror(ret)); | |
255 | goto destroy_attr; | |
256 | } | |
257 | ||
258 | pthread_rwlockattr_destroy(&attr); | |
d7df1d13 JA |
259 | |
260 | return lock; | |
33980f5d SL |
261 | destroy_attr: |
262 | pthread_rwlockattr_destroy(&attr); | |
d7df1d13 JA |
263 | err: |
264 | if (lock) | |
265 | fio_rwlock_remove(lock); | |
266 | return NULL; | |
64d4d313 | 267 | } |