Jens Axboe | 07739b5 | 2007-03-08 20:25:46 +0100 | [diff] [blame] | 1 | #include <stdio.h> |
| 2 | #include <string.h> |
| 3 | #include <unistd.h> |
| 4 | #include <stdlib.h> |
| 5 | #include <fcntl.h> |
Jens Axboe | 656b139 | 2009-07-01 23:02:10 +0200 | [diff] [blame] | 6 | #include <time.h> |
Jens Axboe | 07739b5 | 2007-03-08 20:25:46 +0100 | [diff] [blame] | 7 | #include <pthread.h> |
| 8 | #include <sys/mman.h> |
| 9 | |
Jens Axboe | 4fa6d0f | 2009-01-05 09:45:13 +0100 | [diff] [blame] | 10 | #include "log.h" |
Jens Axboe | 07739b5 | 2007-03-08 20:25:46 +0100 | [diff] [blame] | 11 | #include "mutex.h" |
Jens Axboe | 4d4e80f | 2008-03-04 10:18:56 +0100 | [diff] [blame] | 12 | #include "arch/arch.h" |
Jens Axboe | 3c2d93e | 2009-01-05 19:04:15 +0100 | [diff] [blame] | 13 | #include "os/os.h" |
Jens Axboe | 3b2e146 | 2009-12-15 08:58:10 +0100 | [diff] [blame] | 14 | #include "helpers.h" |
Jens Axboe | 07739b5 | 2007-03-08 20:25:46 +0100 | [diff] [blame] | 15 | |
Jens Axboe | cdd18ad | 2008-02-27 18:58:00 +0100 | [diff] [blame] | 16 | void fio_mutex_remove(struct fio_mutex *mutex) |
Jens Axboe | 07739b5 | 2007-03-08 20:25:46 +0100 | [diff] [blame] | 17 | { |
Jens Axboe | cdd18ad | 2008-02-27 18:58:00 +0100 | [diff] [blame] | 18 | close(mutex->mutex_fd); |
Jens Axboe | 5921e80 | 2008-05-30 15:02:38 +0200 | [diff] [blame] | 19 | munmap((void *) mutex, sizeof(*mutex)); |
Jens Axboe | 07739b5 | 2007-03-08 20:25:46 +0100 | [diff] [blame] | 20 | } |
| 21 | |
Jens Axboe | cdd18ad | 2008-02-27 18:58:00 +0100 | [diff] [blame] | 22 | struct fio_mutex *fio_mutex_init(int value) |
Jens Axboe | 07739b5 | 2007-03-08 20:25:46 +0100 | [diff] [blame] | 23 | { |
Jens Axboe | cdd18ad | 2008-02-27 18:58:00 +0100 | [diff] [blame] | 24 | char mutex_name[] = "/tmp/.fio_mutex.XXXXXX"; |
| 25 | struct fio_mutex *mutex = NULL; |
Jens Axboe | 07739b5 | 2007-03-08 20:25:46 +0100 | [diff] [blame] | 26 | pthread_mutexattr_t attr; |
Zhang, Yanmin | 108fcc1 | 2008-02-04 09:17:52 +0100 | [diff] [blame] | 27 | pthread_condattr_t cond; |
Jens Axboe | f356d01 | 2009-01-05 09:56:29 +0100 | [diff] [blame] | 28 | int fd, ret, mflag; |
Jens Axboe | 07739b5 | 2007-03-08 20:25:46 +0100 | [diff] [blame] | 29 | |
Jens Axboe | cdd18ad | 2008-02-27 18:58:00 +0100 | [diff] [blame] | 30 | fd = mkstemp(mutex_name); |
Jens Axboe | 07739b5 | 2007-03-08 20:25:46 +0100 | [diff] [blame] | 31 | if (fd < 0) { |
Jens Axboe | cdd18ad | 2008-02-27 18:58:00 +0100 | [diff] [blame] | 32 | perror("open mutex"); |
Jens Axboe | 07739b5 | 2007-03-08 20:25:46 +0100 | [diff] [blame] | 33 | return NULL; |
| 34 | } |
| 35 | |
Greg Edwards | 3a8600b | 2010-06-25 09:24:19 -0600 | [diff] [blame] | 36 | #ifdef FIO_HAVE_FALLOCATE |
| 37 | ret = posix_fallocate(fd, 0, sizeof(struct fio_mutex)); |
| 38 | if (ret > 0) { |
| 39 | fprintf(stderr, "posix_fallocate mutex failed: %s\n", strerror(ret)); |
| 40 | goto err; |
| 41 | } |
| 42 | #endif |
| 43 | |
Jens Axboe | cdd18ad | 2008-02-27 18:58:00 +0100 | [diff] [blame] | 44 | if (ftruncate(fd, sizeof(struct fio_mutex)) < 0) { |
| 45 | perror("ftruncate mutex"); |
Jens Axboe | e53bd0b | 2007-03-08 20:29:11 +0100 | [diff] [blame] | 46 | goto err; |
Jens Axboe | 07739b5 | 2007-03-08 20:25:46 +0100 | [diff] [blame] | 47 | } |
| 48 | |
Jens Axboe | 5921e80 | 2008-05-30 15:02:38 +0200 | [diff] [blame] | 49 | mutex = (void *) mmap(NULL, sizeof(struct fio_mutex), |
| 50 | PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); |
Jens Axboe | cdd18ad | 2008-02-27 18:58:00 +0100 | [diff] [blame] | 51 | if (mutex == MAP_FAILED) { |
| 52 | perror("mmap mutex"); |
Jens Axboe | 07739b5 | 2007-03-08 20:25:46 +0100 | [diff] [blame] | 53 | close(fd); |
Jens Axboe | cdd18ad | 2008-02-27 18:58:00 +0100 | [diff] [blame] | 54 | mutex = NULL; |
Jens Axboe | e53bd0b | 2007-03-08 20:29:11 +0100 | [diff] [blame] | 55 | goto err; |
Jens Axboe | 07739b5 | 2007-03-08 20:25:46 +0100 | [diff] [blame] | 56 | } |
| 57 | |
Jens Axboe | cdd18ad | 2008-02-27 18:58:00 +0100 | [diff] [blame] | 58 | unlink(mutex_name); |
| 59 | mutex->mutex_fd = fd; |
| 60 | mutex->value = value; |
Jens Axboe | 07739b5 | 2007-03-08 20:25:46 +0100 | [diff] [blame] | 61 | |
Jens Axboe | f356d01 | 2009-01-05 09:56:29 +0100 | [diff] [blame] | 62 | /* |
| 63 | * Not all platforms support process shared mutexes (FreeBSD) |
| 64 | */ |
| 65 | #ifdef FIO_HAVE_PSHARED_MUTEX |
| 66 | mflag = PTHREAD_PROCESS_SHARED; |
| 67 | #else |
| 68 | mflag = PTHREAD_PROCESS_PRIVATE; |
| 69 | #endif |
| 70 | |
Jens Axboe | 4fa6d0f | 2009-01-05 09:45:13 +0100 | [diff] [blame] | 71 | ret = pthread_mutexattr_init(&attr); |
| 72 | if (ret) { |
| 73 | log_err("pthread_mutexattr_init: %s\n", strerror(ret)); |
Jens Axboe | 07739b5 | 2007-03-08 20:25:46 +0100 | [diff] [blame] | 74 | goto err; |
| 75 | } |
YAMAMOTO Takashi | 7452440 | 2010-05-12 15:06:46 +0200 | [diff] [blame] | 76 | #ifdef FIO_HAVE_PSHARED_MUTEX |
Jens Axboe | f356d01 | 2009-01-05 09:56:29 +0100 | [diff] [blame] | 77 | ret = pthread_mutexattr_setpshared(&attr, mflag); |
Jens Axboe | 4fa6d0f | 2009-01-05 09:45:13 +0100 | [diff] [blame] | 78 | if (ret) { |
| 79 | log_err("pthread_mutexattr_setpshared: %s\n", strerror(ret)); |
Jens Axboe | 07739b5 | 2007-03-08 20:25:46 +0100 | [diff] [blame] | 80 | goto err; |
| 81 | } |
YAMAMOTO Takashi | 7452440 | 2010-05-12 15:06:46 +0200 | [diff] [blame] | 82 | #endif |
Zhang, Yanmin | 108fcc1 | 2008-02-04 09:17:52 +0100 | [diff] [blame] | 83 | |
| 84 | pthread_condattr_init(&cond); |
YAMAMOTO Takashi | 7452440 | 2010-05-12 15:06:46 +0200 | [diff] [blame] | 85 | #ifdef FIO_HAVE_PSHARED_MUTEX |
Jens Axboe | f356d01 | 2009-01-05 09:56:29 +0100 | [diff] [blame] | 86 | pthread_condattr_setpshared(&cond, mflag); |
YAMAMOTO Takashi | 7452440 | 2010-05-12 15:06:46 +0200 | [diff] [blame] | 87 | #endif |
Jens Axboe | cdd18ad | 2008-02-27 18:58:00 +0100 | [diff] [blame] | 88 | pthread_cond_init(&mutex->cond, &cond); |
Zhang, Yanmin | 108fcc1 | 2008-02-04 09:17:52 +0100 | [diff] [blame] | 89 | |
Jens Axboe | 4fa6d0f | 2009-01-05 09:45:13 +0100 | [diff] [blame] | 90 | ret = pthread_mutex_init(&mutex->lock, &attr); |
| 91 | if (ret) { |
| 92 | log_err("pthread_mutex_init: %s\n", strerror(ret)); |
Jens Axboe | 07739b5 | 2007-03-08 20:25:46 +0100 | [diff] [blame] | 93 | goto err; |
| 94 | } |
| 95 | |
Bruce Cran | 03e20d6 | 2011-01-02 20:14:54 +0100 | [diff] [blame^] | 96 | pthread_condattr_destroy(&cond); |
| 97 | pthread_mutexattr_destroy(&attr); |
| 98 | |
Jens Axboe | cdd18ad | 2008-02-27 18:58:00 +0100 | [diff] [blame] | 99 | return mutex; |
Jens Axboe | 07739b5 | 2007-03-08 20:25:46 +0100 | [diff] [blame] | 100 | err: |
Jens Axboe | cdd18ad | 2008-02-27 18:58:00 +0100 | [diff] [blame] | 101 | if (mutex) |
| 102 | fio_mutex_remove(mutex); |
Jens Axboe | f7c9e00 | 2007-03-09 12:40:02 +0100 | [diff] [blame] | 103 | |
Jens Axboe | cdd18ad | 2008-02-27 18:58:00 +0100 | [diff] [blame] | 104 | unlink(mutex_name); |
Jens Axboe | 07739b5 | 2007-03-08 20:25:46 +0100 | [diff] [blame] | 105 | return NULL; |
| 106 | } |
| 107 | |
Jens Axboe | 656b139 | 2009-07-01 23:02:10 +0200 | [diff] [blame] | 108 | int fio_mutex_down_timeout(struct fio_mutex *mutex, unsigned int seconds) |
| 109 | { |
| 110 | struct timespec t; |
| 111 | int ret = 0; |
| 112 | |
Jens Axboe | d481e00 | 2009-12-04 09:56:32 +0100 | [diff] [blame] | 113 | clock_gettime(CLOCK_REALTIME, &t); |
Jens Axboe | 656b139 | 2009-07-01 23:02:10 +0200 | [diff] [blame] | 114 | t.tv_sec += seconds; |
| 115 | |
| 116 | pthread_mutex_lock(&mutex->lock); |
| 117 | |
| 118 | while (!mutex->value && !ret) { |
| 119 | mutex->waiters++; |
| 120 | ret = pthread_cond_timedwait(&mutex->cond, &mutex->lock, &t); |
| 121 | mutex->waiters--; |
| 122 | } |
| 123 | |
| 124 | if (!ret) { |
| 125 | mutex->value--; |
| 126 | pthread_mutex_unlock(&mutex->lock); |
| 127 | } |
| 128 | |
| 129 | return ret; |
| 130 | } |
| 131 | |
Jens Axboe | cdd18ad | 2008-02-27 18:58:00 +0100 | [diff] [blame] | 132 | void fio_mutex_down(struct fio_mutex *mutex) |
Jens Axboe | 07739b5 | 2007-03-08 20:25:46 +0100 | [diff] [blame] | 133 | { |
Jens Axboe | cdd18ad | 2008-02-27 18:58:00 +0100 | [diff] [blame] | 134 | pthread_mutex_lock(&mutex->lock); |
Jens Axboe | 4d4e80f | 2008-03-04 10:18:56 +0100 | [diff] [blame] | 135 | |
| 136 | while (!mutex->value) { |
| 137 | mutex->waiters++; |
Jens Axboe | cdd18ad | 2008-02-27 18:58:00 +0100 | [diff] [blame] | 138 | pthread_cond_wait(&mutex->cond, &mutex->lock); |
Jens Axboe | 4d4e80f | 2008-03-04 10:18:56 +0100 | [diff] [blame] | 139 | mutex->waiters--; |
| 140 | } |
| 141 | |
Jens Axboe | cdd18ad | 2008-02-27 18:58:00 +0100 | [diff] [blame] | 142 | mutex->value--; |
| 143 | pthread_mutex_unlock(&mutex->lock); |
Jens Axboe | 07739b5 | 2007-03-08 20:25:46 +0100 | [diff] [blame] | 144 | } |
| 145 | |
Jens Axboe | cdd18ad | 2008-02-27 18:58:00 +0100 | [diff] [blame] | 146 | void fio_mutex_up(struct fio_mutex *mutex) |
Jens Axboe | 07739b5 | 2007-03-08 20:25:46 +0100 | [diff] [blame] | 147 | { |
Jens Axboe | cdd18ad | 2008-02-27 18:58:00 +0100 | [diff] [blame] | 148 | pthread_mutex_lock(&mutex->lock); |
Jens Axboe | 4d4e80f | 2008-03-04 10:18:56 +0100 | [diff] [blame] | 149 | read_barrier(); |
| 150 | if (!mutex->value && mutex->waiters) |
Jens Axboe | cdd18ad | 2008-02-27 18:58:00 +0100 | [diff] [blame] | 151 | pthread_cond_signal(&mutex->cond); |
| 152 | mutex->value++; |
| 153 | pthread_mutex_unlock(&mutex->lock); |
Jens Axboe | 07739b5 | 2007-03-08 20:25:46 +0100 | [diff] [blame] | 154 | } |
Jens Axboe | 64d4d31 | 2008-03-03 10:36:27 +0100 | [diff] [blame] | 155 | |
| 156 | void fio_mutex_down_write(struct fio_mutex *mutex) |
| 157 | { |
| 158 | pthread_mutex_lock(&mutex->lock); |
Jens Axboe | 4d4e80f | 2008-03-04 10:18:56 +0100 | [diff] [blame] | 159 | |
| 160 | while (mutex->value != 0) { |
| 161 | mutex->waiters++; |
Jens Axboe | 64d4d31 | 2008-03-03 10:36:27 +0100 | [diff] [blame] | 162 | pthread_cond_wait(&mutex->cond, &mutex->lock); |
Jens Axboe | 4d4e80f | 2008-03-04 10:18:56 +0100 | [diff] [blame] | 163 | mutex->waiters--; |
| 164 | } |
| 165 | |
Jens Axboe | 64d4d31 | 2008-03-03 10:36:27 +0100 | [diff] [blame] | 166 | mutex->value--; |
| 167 | pthread_mutex_unlock(&mutex->lock); |
| 168 | } |
| 169 | |
| 170 | void fio_mutex_down_read(struct fio_mutex *mutex) |
| 171 | { |
| 172 | pthread_mutex_lock(&mutex->lock); |
Jens Axboe | 4d4e80f | 2008-03-04 10:18:56 +0100 | [diff] [blame] | 173 | |
| 174 | while (mutex->value < 0) { |
| 175 | mutex->waiters++; |
Jens Axboe | 64d4d31 | 2008-03-03 10:36:27 +0100 | [diff] [blame] | 176 | pthread_cond_wait(&mutex->cond, &mutex->lock); |
Jens Axboe | 4d4e80f | 2008-03-04 10:18:56 +0100 | [diff] [blame] | 177 | mutex->waiters--; |
| 178 | } |
| 179 | |
Jens Axboe | 64d4d31 | 2008-03-03 10:36:27 +0100 | [diff] [blame] | 180 | mutex->value++; |
| 181 | pthread_mutex_unlock(&mutex->lock); |
| 182 | } |
| 183 | |
| 184 | void fio_mutex_up_read(struct fio_mutex *mutex) |
| 185 | { |
| 186 | pthread_mutex_lock(&mutex->lock); |
| 187 | mutex->value--; |
Jens Axboe | 4d4e80f | 2008-03-04 10:18:56 +0100 | [diff] [blame] | 188 | read_barrier(); |
| 189 | if (mutex->value >= 0 && mutex->waiters) |
Jens Axboe | 64d4d31 | 2008-03-03 10:36:27 +0100 | [diff] [blame] | 190 | pthread_cond_signal(&mutex->cond); |
| 191 | pthread_mutex_unlock(&mutex->lock); |
| 192 | } |
| 193 | |
| 194 | void fio_mutex_up_write(struct fio_mutex *mutex) |
| 195 | { |
| 196 | pthread_mutex_lock(&mutex->lock); |
| 197 | mutex->value++; |
Jens Axboe | 4d4e80f | 2008-03-04 10:18:56 +0100 | [diff] [blame] | 198 | read_barrier(); |
| 199 | if (mutex->value >= 0 && mutex->waiters) |
Jens Axboe | 64d4d31 | 2008-03-03 10:36:27 +0100 | [diff] [blame] | 200 | pthread_cond_signal(&mutex->cond); |
| 201 | pthread_mutex_unlock(&mutex->lock); |
| 202 | } |