Commit | Line | Data |
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ae626d4e BVA |
1 | #include <stdio.h> |
2 | #include <string.h> | |
3 | #include <sys/mman.h> | |
4 | #include <assert.h> | |
5 | ||
6 | #include "log.h" | |
7 | #include "rwlock.h" | |
8 | #include "os/os.h" | |
9 | ||
10 | void fio_rwlock_write(struct fio_rwlock *lock) | |
11 | { | |
12 | assert(lock->magic == FIO_RWLOCK_MAGIC); | |
13 | pthread_rwlock_wrlock(&lock->lock); | |
14 | } | |
15 | ||
16 | void fio_rwlock_read(struct fio_rwlock *lock) | |
17 | { | |
18 | assert(lock->magic == FIO_RWLOCK_MAGIC); | |
19 | pthread_rwlock_rdlock(&lock->lock); | |
20 | } | |
21 | ||
22 | void fio_rwlock_unlock(struct fio_rwlock *lock) | |
23 | { | |
24 | assert(lock->magic == FIO_RWLOCK_MAGIC); | |
25 | pthread_rwlock_unlock(&lock->lock); | |
26 | } | |
27 | ||
28 | void fio_rwlock_remove(struct fio_rwlock *lock) | |
29 | { | |
30 | assert(lock->magic == FIO_RWLOCK_MAGIC); | |
31 | munmap((void *) lock, sizeof(*lock)); | |
32 | } | |
33 | ||
34 | struct fio_rwlock *fio_rwlock_init(void) | |
35 | { | |
36 | struct fio_rwlock *lock; | |
37 | pthread_rwlockattr_t attr; | |
38 | int ret; | |
39 | ||
40 | lock = (void *) mmap(NULL, sizeof(struct fio_rwlock), | |
41 | PROT_READ | PROT_WRITE, | |
42 | OS_MAP_ANON | MAP_SHARED, -1, 0); | |
43 | if (lock == MAP_FAILED) { | |
44 | perror("mmap rwlock"); | |
45 | lock = NULL; | |
46 | goto err; | |
47 | } | |
48 | ||
49 | lock->magic = FIO_RWLOCK_MAGIC; | |
50 | ||
51 | ret = pthread_rwlockattr_init(&attr); | |
52 | if (ret) { | |
53 | log_err("pthread_rwlockattr_init: %s\n", strerror(ret)); | |
54 | goto err; | |
55 | } | |
56 | #ifdef CONFIG_PSHARED | |
57 | ret = pthread_rwlockattr_setpshared(&attr, PTHREAD_PROCESS_SHARED); | |
58 | if (ret) { | |
59 | log_err("pthread_rwlockattr_setpshared: %s\n", strerror(ret)); | |
60 | goto destroy_attr; | |
61 | } | |
62 | ||
63 | ret = pthread_rwlock_init(&lock->lock, &attr); | |
64 | #else | |
65 | ret = pthread_rwlock_init(&lock->lock, NULL); | |
66 | #endif | |
67 | ||
68 | if (ret) { | |
69 | log_err("pthread_rwlock_init: %s\n", strerror(ret)); | |
70 | goto destroy_attr; | |
71 | } | |
72 | ||
73 | pthread_rwlockattr_destroy(&attr); | |
74 | ||
75 | return lock; | |
76 | destroy_attr: | |
77 | pthread_rwlockattr_destroy(&attr); | |
78 | err: | |
79 | if (lock) | |
80 | fio_rwlock_remove(lock); | |
81 | return NULL; | |
82 | } |