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