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" |
ef635057 JA |
18 | #include "time.h" |
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 | ||
cdd18ad8 | 28 | struct fio_mutex *fio_mutex_init(int value) |
07739b57 | 29 | { |
cdd18ad8 | 30 | struct fio_mutex *mutex = NULL; |
07739b57 | 31 | pthread_mutexattr_t attr; |
108fcc11 | 32 | pthread_condattr_t cond; |
e721c57f | 33 | int ret; |
07739b57 | 34 | |
5921e80c | 35 | mutex = (void *) mmap(NULL, sizeof(struct fio_mutex), |
b6f6abc6 JA |
36 | PROT_READ | PROT_WRITE, |
37 | OS_MAP_ANON | MAP_SHARED, -1, 0); | |
cdd18ad8 JA |
38 | if (mutex == MAP_FAILED) { |
39 | perror("mmap mutex"); | |
cdd18ad8 | 40 | mutex = NULL; |
e53bd0b3 | 41 | goto err; |
07739b57 JA |
42 | } |
43 | ||
cdd18ad8 | 44 | mutex->value = value; |
8b4e954c | 45 | mutex->magic = FIO_MUTEX_MAGIC; |
07739b57 | 46 | |
4fa6d0f8 JA |
47 | ret = pthread_mutexattr_init(&attr); |
48 | if (ret) { | |
49 | log_err("pthread_mutexattr_init: %s\n", strerror(ret)); | |
07739b57 JA |
50 | goto err; |
51 | } | |
e721c57f JA |
52 | |
53 | /* | |
54 | * Not all platforms support process shared mutexes (FreeBSD) | |
55 | */ | |
7452440e | 56 | #ifdef FIO_HAVE_PSHARED_MUTEX |
e721c57f | 57 | ret = pthread_mutexattr_setpshared(&attr, PTHREAD_PROCESS_SHARED); |
4fa6d0f8 JA |
58 | if (ret) { |
59 | log_err("pthread_mutexattr_setpshared: %s\n", strerror(ret)); | |
07739b57 JA |
60 | goto err; |
61 | } | |
7452440e | 62 | #endif |
108fcc11 ZY |
63 | |
64 | pthread_condattr_init(&cond); | |
7452440e | 65 | #ifdef FIO_HAVE_PSHARED_MUTEX |
e721c57f | 66 | pthread_condattr_setpshared(&cond, PTHREAD_PROCESS_SHARED); |
ceab2ea2 | 67 | #endif |
58a157d4 | 68 | pthread_cond_init(&mutex->cond, &cond); |
108fcc11 | 69 | |
4fa6d0f8 JA |
70 | ret = pthread_mutex_init(&mutex->lock, &attr); |
71 | if (ret) { | |
72 | log_err("pthread_mutex_init: %s\n", strerror(ret)); | |
07739b57 JA |
73 | goto err; |
74 | } | |
75 | ||
03e20d68 BC |
76 | pthread_condattr_destroy(&cond); |
77 | pthread_mutexattr_destroy(&attr); | |
78 | ||
cdd18ad8 | 79 | return mutex; |
07739b57 | 80 | err: |
cdd18ad8 JA |
81 | if (mutex) |
82 | fio_mutex_remove(mutex); | |
f7c9e00e | 83 | |
07739b57 JA |
84 | return NULL; |
85 | } | |
86 | ||
ef635057 JA |
87 | static int mutex_timed_out(struct timeval *t, unsigned int seconds) |
88 | { | |
89 | return mtime_since_now(t) >= seconds * 1000; | |
90 | } | |
91 | ||
656b1393 JA |
92 | int fio_mutex_down_timeout(struct fio_mutex *mutex, unsigned int seconds) |
93 | { | |
ef635057 | 94 | struct timeval tv_s; |
656b1393 JA |
95 | struct timespec t; |
96 | int ret = 0; | |
97 | ||
8f801ad5 | 98 | assert(mutex->magic == FIO_MUTEX_MAGIC); |
8b4e954c | 99 | |
b11e4ccf JA |
100 | gettimeofday(&tv_s, NULL); |
101 | t.tv_sec = tv_s.tv_sec + seconds; | |
102 | t.tv_nsec = tv_s.tv_usec * 1000; | |
656b1393 JA |
103 | |
104 | pthread_mutex_lock(&mutex->lock); | |
105 | ||
106 | while (!mutex->value && !ret) { | |
107 | mutex->waiters++; | |
ef635057 JA |
108 | |
109 | /* | |
110 | * Some platforms (FreeBSD 9?) seems to return timed out | |
111 | * way too early, double check. | |
112 | */ | |
656b1393 | 113 | ret = pthread_cond_timedwait(&mutex->cond, &mutex->lock, &t); |
d7df1d13 | 114 | if (ret == ETIMEDOUT && !mutex_timed_out(&tv_s, seconds)) |
ef635057 | 115 | ret = 0; |
ef635057 | 116 | |
656b1393 JA |
117 | mutex->waiters--; |
118 | } | |
119 | ||
120 | if (!ret) { | |
121 | mutex->value--; | |
122 | pthread_mutex_unlock(&mutex->lock); | |
123 | } | |
124 | ||
125 | return ret; | |
126 | } | |
127 | ||
cdd18ad8 | 128 | void fio_mutex_down(struct fio_mutex *mutex) |
07739b57 | 129 | { |
8f801ad5 | 130 | assert(mutex->magic == FIO_MUTEX_MAGIC); |
8b4e954c | 131 | |
cdd18ad8 | 132 | pthread_mutex_lock(&mutex->lock); |
4d4e80f2 JA |
133 | |
134 | while (!mutex->value) { | |
135 | mutex->waiters++; | |
cdd18ad8 | 136 | pthread_cond_wait(&mutex->cond, &mutex->lock); |
4d4e80f2 JA |
137 | mutex->waiters--; |
138 | } | |
139 | ||
cdd18ad8 JA |
140 | mutex->value--; |
141 | pthread_mutex_unlock(&mutex->lock); | |
07739b57 JA |
142 | } |
143 | ||
cdd18ad8 | 144 | void fio_mutex_up(struct fio_mutex *mutex) |
07739b57 | 145 | { |
8f801ad5 | 146 | assert(mutex->magic == FIO_MUTEX_MAGIC); |
8b4e954c | 147 | |
cdd18ad8 | 148 | pthread_mutex_lock(&mutex->lock); |
4d4e80f2 JA |
149 | read_barrier(); |
150 | if (!mutex->value && mutex->waiters) | |
cdd18ad8 JA |
151 | pthread_cond_signal(&mutex->cond); |
152 | mutex->value++; | |
153 | pthread_mutex_unlock(&mutex->lock); | |
07739b57 | 154 | } |
64d4d313 | 155 | |
d7df1d13 | 156 | void fio_rwlock_write(struct fio_rwlock *lock) |
64d4d313 | 157 | { |
8f801ad5 | 158 | assert(lock->magic == FIO_RWLOCK_MAGIC); |
d7df1d13 | 159 | pthread_rwlock_wrlock(&lock->lock); |
64d4d313 JA |
160 | } |
161 | ||
d7df1d13 | 162 | void fio_rwlock_read(struct fio_rwlock *lock) |
64d4d313 | 163 | { |
8f801ad5 | 164 | assert(lock->magic == FIO_RWLOCK_MAGIC); |
d7df1d13 JA |
165 | pthread_rwlock_rdlock(&lock->lock); |
166 | } | |
4d4e80f2 | 167 | |
d7df1d13 JA |
168 | void fio_rwlock_unlock(struct fio_rwlock *lock) |
169 | { | |
8f801ad5 | 170 | assert(lock->magic == FIO_RWLOCK_MAGIC); |
d7df1d13 | 171 | pthread_rwlock_unlock(&lock->lock); |
64d4d313 JA |
172 | } |
173 | ||
d7df1d13 | 174 | void fio_rwlock_remove(struct fio_rwlock *lock) |
64d4d313 | 175 | { |
8f801ad5 | 176 | assert(lock->magic == FIO_RWLOCK_MAGIC); |
d7df1d13 | 177 | munmap((void *) lock, sizeof(*lock)); |
64d4d313 JA |
178 | } |
179 | ||
d7df1d13 | 180 | struct fio_rwlock *fio_rwlock_init(void) |
64d4d313 | 181 | { |
d7df1d13 | 182 | struct fio_rwlock *lock; |
33980f5d | 183 | pthread_rwlockattr_t attr; |
d7df1d13 JA |
184 | int ret; |
185 | ||
186 | lock = (void *) mmap(NULL, sizeof(struct fio_rwlock), | |
187 | PROT_READ | PROT_WRITE, | |
188 | OS_MAP_ANON | MAP_SHARED, -1, 0); | |
189 | if (lock == MAP_FAILED) { | |
190 | perror("mmap rwlock"); | |
191 | lock = NULL; | |
192 | goto err; | |
193 | } | |
194 | ||
8b4e954c JA |
195 | lock->magic = FIO_RWLOCK_MAGIC; |
196 | ||
33980f5d | 197 | ret = pthread_rwlockattr_init(&attr); |
d7df1d13 | 198 | if (ret) { |
cdb57fe2 | 199 | log_err("pthread_rwlockattr_init: %s\n", strerror(ret)); |
d7df1d13 JA |
200 | goto err; |
201 | } | |
33980f5d SL |
202 | #ifdef FIO_HAVE_PSHARED_MUTEX |
203 | ret = pthread_rwlockattr_setpshared(&attr, PTHREAD_PROCESS_SHARED); | |
204 | if (ret) { | |
cdb57fe2 | 205 | log_err("pthread_rwlockattr_setpshared: %s\n", strerror(ret)); |
33980f5d SL |
206 | goto destroy_attr; |
207 | } | |
33980f5d SL |
208 | |
209 | ret = pthread_rwlock_init(&lock->lock, &attr); | |
09f17d62 BC |
210 | #else |
211 | ret = pthread_rwlock_init(&lock->lock, NULL); | |
212 | #endif | |
213 | ||
33980f5d SL |
214 | if (ret) { |
215 | log_err("pthread_rwlock_init: %s\n", strerror(ret)); | |
216 | goto destroy_attr; | |
217 | } | |
218 | ||
219 | pthread_rwlockattr_destroy(&attr); | |
d7df1d13 JA |
220 | |
221 | return lock; | |
33980f5d SL |
222 | destroy_attr: |
223 | pthread_rwlockattr_destroy(&attr); | |
d7df1d13 JA |
224 | err: |
225 | if (lock) | |
226 | fio_rwlock_remove(lock); | |
227 | return NULL; | |
64d4d313 | 228 | } |