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 | ||
ef635057 JA |
95 | static int mutex_timed_out(struct timeval *t, unsigned int seconds) |
96 | { | |
97 | return mtime_since_now(t) >= seconds * 1000; | |
98 | } | |
99 | ||
656b1393 JA |
100 | int fio_mutex_down_timeout(struct fio_mutex *mutex, unsigned int seconds) |
101 | { | |
ef635057 | 102 | struct timeval tv_s; |
656b1393 JA |
103 | struct timespec t; |
104 | int ret = 0; | |
105 | ||
8f801ad5 | 106 | assert(mutex->magic == FIO_MUTEX_MAGIC); |
8b4e954c | 107 | |
b11e4ccf JA |
108 | gettimeofday(&tv_s, NULL); |
109 | t.tv_sec = tv_s.tv_sec + seconds; | |
110 | t.tv_nsec = tv_s.tv_usec * 1000; | |
656b1393 JA |
111 | |
112 | pthread_mutex_lock(&mutex->lock); | |
113 | ||
114 | while (!mutex->value && !ret) { | |
115 | mutex->waiters++; | |
ef635057 JA |
116 | |
117 | /* | |
118 | * Some platforms (FreeBSD 9?) seems to return timed out | |
119 | * way too early, double check. | |
120 | */ | |
656b1393 | 121 | ret = pthread_cond_timedwait(&mutex->cond, &mutex->lock, &t); |
d7df1d13 | 122 | if (ret == ETIMEDOUT && !mutex_timed_out(&tv_s, seconds)) |
ef635057 | 123 | ret = 0; |
ef635057 | 124 | |
656b1393 JA |
125 | mutex->waiters--; |
126 | } | |
127 | ||
128 | if (!ret) { | |
129 | mutex->value--; | |
130 | pthread_mutex_unlock(&mutex->lock); | |
131 | } | |
132 | ||
133 | return ret; | |
134 | } | |
135 | ||
72242057 JA |
136 | int fio_mutex_down_trylock(struct fio_mutex *mutex) |
137 | { | |
138 | int ret = 1; | |
139 | ||
140 | assert(mutex->magic == FIO_MUTEX_MAGIC); | |
141 | ||
142 | pthread_mutex_lock(&mutex->lock); | |
143 | if (mutex->value) { | |
144 | mutex->value--; | |
145 | ret = 0; | |
146 | } | |
147 | pthread_mutex_unlock(&mutex->lock); | |
148 | ||
149 | return ret; | |
150 | } | |
151 | ||
cdd18ad8 | 152 | void fio_mutex_down(struct fio_mutex *mutex) |
07739b57 | 153 | { |
8f801ad5 | 154 | assert(mutex->magic == FIO_MUTEX_MAGIC); |
8b4e954c | 155 | |
cdd18ad8 | 156 | pthread_mutex_lock(&mutex->lock); |
4d4e80f2 JA |
157 | |
158 | while (!mutex->value) { | |
159 | mutex->waiters++; | |
cdd18ad8 | 160 | pthread_cond_wait(&mutex->cond, &mutex->lock); |
4d4e80f2 JA |
161 | mutex->waiters--; |
162 | } | |
163 | ||
cdd18ad8 JA |
164 | mutex->value--; |
165 | pthread_mutex_unlock(&mutex->lock); | |
07739b57 JA |
166 | } |
167 | ||
cdd18ad8 | 168 | void fio_mutex_up(struct fio_mutex *mutex) |
07739b57 | 169 | { |
6899b6cb JA |
170 | int do_wake = 0; |
171 | ||
8f801ad5 | 172 | assert(mutex->magic == FIO_MUTEX_MAGIC); |
8b4e954c | 173 | |
cdd18ad8 | 174 | pthread_mutex_lock(&mutex->lock); |
4d4e80f2 JA |
175 | read_barrier(); |
176 | if (!mutex->value && mutex->waiters) | |
6899b6cb | 177 | do_wake = 1; |
cdd18ad8 JA |
178 | mutex->value++; |
179 | pthread_mutex_unlock(&mutex->lock); | |
6899b6cb JA |
180 | |
181 | if (do_wake) | |
182 | pthread_cond_signal(&mutex->cond); | |
07739b57 | 183 | } |
64d4d313 | 184 | |
d7df1d13 | 185 | void fio_rwlock_write(struct fio_rwlock *lock) |
64d4d313 | 186 | { |
8f801ad5 | 187 | assert(lock->magic == FIO_RWLOCK_MAGIC); |
d7df1d13 | 188 | pthread_rwlock_wrlock(&lock->lock); |
64d4d313 JA |
189 | } |
190 | ||
d7df1d13 | 191 | void fio_rwlock_read(struct fio_rwlock *lock) |
64d4d313 | 192 | { |
8f801ad5 | 193 | assert(lock->magic == FIO_RWLOCK_MAGIC); |
d7df1d13 JA |
194 | pthread_rwlock_rdlock(&lock->lock); |
195 | } | |
4d4e80f2 | 196 | |
d7df1d13 JA |
197 | void fio_rwlock_unlock(struct fio_rwlock *lock) |
198 | { | |
8f801ad5 | 199 | assert(lock->magic == FIO_RWLOCK_MAGIC); |
d7df1d13 | 200 | pthread_rwlock_unlock(&lock->lock); |
64d4d313 JA |
201 | } |
202 | ||
d7df1d13 | 203 | void fio_rwlock_remove(struct fio_rwlock *lock) |
64d4d313 | 204 | { |
8f801ad5 | 205 | assert(lock->magic == FIO_RWLOCK_MAGIC); |
d7df1d13 | 206 | munmap((void *) lock, sizeof(*lock)); |
64d4d313 JA |
207 | } |
208 | ||
d7df1d13 | 209 | struct fio_rwlock *fio_rwlock_init(void) |
64d4d313 | 210 | { |
d7df1d13 | 211 | struct fio_rwlock *lock; |
33980f5d | 212 | pthread_rwlockattr_t attr; |
d7df1d13 JA |
213 | int ret; |
214 | ||
215 | lock = (void *) mmap(NULL, sizeof(struct fio_rwlock), | |
216 | PROT_READ | PROT_WRITE, | |
217 | OS_MAP_ANON | MAP_SHARED, -1, 0); | |
218 | if (lock == MAP_FAILED) { | |
219 | perror("mmap rwlock"); | |
220 | lock = NULL; | |
221 | goto err; | |
222 | } | |
223 | ||
8b4e954c JA |
224 | lock->magic = FIO_RWLOCK_MAGIC; |
225 | ||
33980f5d | 226 | ret = pthread_rwlockattr_init(&attr); |
d7df1d13 | 227 | if (ret) { |
cdb57fe2 | 228 | log_err("pthread_rwlockattr_init: %s\n", strerror(ret)); |
d7df1d13 JA |
229 | goto err; |
230 | } | |
33980f5d SL |
231 | #ifdef FIO_HAVE_PSHARED_MUTEX |
232 | ret = pthread_rwlockattr_setpshared(&attr, PTHREAD_PROCESS_SHARED); | |
233 | if (ret) { | |
cdb57fe2 | 234 | log_err("pthread_rwlockattr_setpshared: %s\n", strerror(ret)); |
33980f5d SL |
235 | goto destroy_attr; |
236 | } | |
33980f5d SL |
237 | |
238 | ret = pthread_rwlock_init(&lock->lock, &attr); | |
09f17d62 BC |
239 | #else |
240 | ret = pthread_rwlock_init(&lock->lock, NULL); | |
241 | #endif | |
242 | ||
33980f5d SL |
243 | if (ret) { |
244 | log_err("pthread_rwlock_init: %s\n", strerror(ret)); | |
245 | goto destroy_attr; | |
246 | } | |
247 | ||
248 | pthread_rwlockattr_destroy(&attr); | |
d7df1d13 JA |
249 | |
250 | return lock; | |
33980f5d SL |
251 | destroy_attr: |
252 | pthread_rwlockattr_destroy(&attr); | |
d7df1d13 JA |
253 | err: |
254 | if (lock) | |
255 | fio_rwlock_remove(lock); | |
256 | return NULL; | |
64d4d313 | 257 | } |