#include <stdlib.h>
#include <fcntl.h>
#include <time.h>
+#include <errno.h>
#include <pthread.h>
#include <sys/mman.h>
+#include <assert.h>
+#include "fio.h"
#include "log.h"
#include "mutex.h"
#include "arch/arch.h"
#include "os/os.h"
+#include "helpers.h"
+#include "time.h"
+#include "gettime.h"
void fio_mutex_remove(struct fio_mutex *mutex)
{
- close(mutex->mutex_fd);
+ assert(mutex->magic == FIO_MUTEX_MAGIC);
+ pthread_cond_destroy(&mutex->cond);
munmap((void *) mutex, sizeof(*mutex));
}
struct fio_mutex *fio_mutex_init(int value)
{
- char mutex_name[] = "/tmp/.fio_mutex.XXXXXX";
struct fio_mutex *mutex = NULL;
pthread_mutexattr_t attr;
pthread_condattr_t cond;
- int fd, ret, mflag;
-
- fd = mkstemp(mutex_name);
- if (fd < 0) {
- perror("open mutex");
- return NULL;
- }
-
- if (ftruncate(fd, sizeof(struct fio_mutex)) < 0) {
- perror("ftruncate mutex");
- goto err;
- }
+ int ret;
mutex = (void *) mmap(NULL, sizeof(struct fio_mutex),
- PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+ PROT_READ | PROT_WRITE,
+ OS_MAP_ANON | MAP_SHARED, -1, 0);
if (mutex == MAP_FAILED) {
perror("mmap mutex");
- close(fd);
mutex = NULL;
goto err;
}
- unlink(mutex_name);
- mutex->mutex_fd = fd;
mutex->value = value;
-
- /*
- * Not all platforms support process shared mutexes (FreeBSD)
- */
-#ifdef FIO_HAVE_PSHARED_MUTEX
- mflag = PTHREAD_PROCESS_SHARED;
-#else
- mflag = PTHREAD_PROCESS_PRIVATE;
-#endif
+ mutex->magic = FIO_MUTEX_MAGIC;
ret = pthread_mutexattr_init(&attr);
if (ret) {
log_err("pthread_mutexattr_init: %s\n", strerror(ret));
goto err;
}
- ret = pthread_mutexattr_setpshared(&attr, mflag);
+
+ /*
+ * Not all platforms support process shared mutexes (FreeBSD)
+ */
+#ifdef FIO_HAVE_PSHARED_MUTEX
+ ret = pthread_mutexattr_setpshared(&attr, PTHREAD_PROCESS_SHARED);
if (ret) {
log_err("pthread_mutexattr_setpshared: %s\n", strerror(ret));
goto err;
}
+#endif
pthread_condattr_init(&cond);
- pthread_condattr_setpshared(&cond, mflag);
+#ifdef FIO_HAVE_PSHARED_MUTEX
+ pthread_condattr_setpshared(&cond, PTHREAD_PROCESS_SHARED);
+#endif
pthread_cond_init(&mutex->cond, &cond);
ret = pthread_mutex_init(&mutex->lock, &attr);
goto err;
}
+ pthread_condattr_destroy(&cond);
+ pthread_mutexattr_destroy(&attr);
+
return mutex;
err:
if (mutex)
fio_mutex_remove(mutex);
- unlink(mutex_name);
return NULL;
}
+static int mutex_timed_out(struct timeval *t, unsigned int seconds)
+{
+ return mtime_since_now(t) >= seconds * 1000;
+}
+
int fio_mutex_down_timeout(struct fio_mutex *mutex, unsigned int seconds)
{
+ struct timeval tv_s;
struct timespec t;
int ret = 0;
- clock_gettime(CLOCK_REALTIME, &t);
- t.tv_sec += seconds;
+ assert(mutex->magic == FIO_MUTEX_MAGIC);
+
+ gettimeofday(&tv_s, NULL);
+ t.tv_sec = tv_s.tv_sec + seconds;
+ t.tv_nsec = tv_s.tv_usec * 1000;
pthread_mutex_lock(&mutex->lock);
while (!mutex->value && !ret) {
mutex->waiters++;
+
+ /*
+ * Some platforms (FreeBSD 9?) seems to return timed out
+ * way too early, double check.
+ */
ret = pthread_cond_timedwait(&mutex->cond, &mutex->lock, &t);
+ if (ret == ETIMEDOUT && !mutex_timed_out(&tv_s, seconds))
+ ret = 0;
+
mutex->waiters--;
}
void fio_mutex_down(struct fio_mutex *mutex)
{
+ assert(mutex->magic == FIO_MUTEX_MAGIC);
+
pthread_mutex_lock(&mutex->lock);
while (!mutex->value) {
void fio_mutex_up(struct fio_mutex *mutex)
{
+ assert(mutex->magic == FIO_MUTEX_MAGIC);
+
pthread_mutex_lock(&mutex->lock);
read_barrier();
if (!mutex->value && mutex->waiters)
pthread_mutex_unlock(&mutex->lock);
}
-void fio_mutex_down_write(struct fio_mutex *mutex)
+void fio_rwlock_write(struct fio_rwlock *lock)
{
- pthread_mutex_lock(&mutex->lock);
-
- while (mutex->value != 0) {
- mutex->waiters++;
- pthread_cond_wait(&mutex->cond, &mutex->lock);
- mutex->waiters--;
- }
-
- mutex->value--;
- pthread_mutex_unlock(&mutex->lock);
+ assert(lock->magic == FIO_RWLOCK_MAGIC);
+ pthread_rwlock_wrlock(&lock->lock);
}
-void fio_mutex_down_read(struct fio_mutex *mutex)
+void fio_rwlock_read(struct fio_rwlock *lock)
{
- pthread_mutex_lock(&mutex->lock);
-
- while (mutex->value < 0) {
- mutex->waiters++;
- pthread_cond_wait(&mutex->cond, &mutex->lock);
- mutex->waiters--;
- }
+ assert(lock->magic == FIO_RWLOCK_MAGIC);
+ pthread_rwlock_rdlock(&lock->lock);
+}
- mutex->value++;
- pthread_mutex_unlock(&mutex->lock);
+void fio_rwlock_unlock(struct fio_rwlock *lock)
+{
+ assert(lock->magic == FIO_RWLOCK_MAGIC);
+ pthread_rwlock_unlock(&lock->lock);
}
-void fio_mutex_up_read(struct fio_mutex *mutex)
+void fio_rwlock_remove(struct fio_rwlock *lock)
{
- pthread_mutex_lock(&mutex->lock);
- mutex->value--;
- read_barrier();
- if (mutex->value >= 0 && mutex->waiters)
- pthread_cond_signal(&mutex->cond);
- pthread_mutex_unlock(&mutex->lock);
+ assert(lock->magic == FIO_RWLOCK_MAGIC);
+ munmap((void *) lock, sizeof(*lock));
}
-void fio_mutex_up_write(struct fio_mutex *mutex)
+struct fio_rwlock *fio_rwlock_init(void)
{
- pthread_mutex_lock(&mutex->lock);
- mutex->value++;
- read_barrier();
- if (mutex->value >= 0 && mutex->waiters)
- pthread_cond_signal(&mutex->cond);
- pthread_mutex_unlock(&mutex->lock);
+ struct fio_rwlock *lock;
+ pthread_rwlockattr_t attr;
+ int ret;
+
+ lock = (void *) mmap(NULL, sizeof(struct fio_rwlock),
+ PROT_READ | PROT_WRITE,
+ OS_MAP_ANON | MAP_SHARED, -1, 0);
+ if (lock == MAP_FAILED) {
+ perror("mmap rwlock");
+ lock = NULL;
+ goto err;
+ }
+
+ lock->magic = FIO_RWLOCK_MAGIC;
+
+ ret = pthread_rwlockattr_init(&attr);
+ if (ret) {
+ log_err("pthread_rwlock_init: %s\n", strerror(ret));
+ goto err;
+ }
+#ifdef FIO_HAVE_PSHARED_MUTEX
+ ret = pthread_rwlockattr_setpshared(&attr, PTHREAD_PROCESS_SHARED);
+ if (ret) {
+ log_err("pthread_rwlock_init: %s\n", strerror(ret));
+ goto destroy_attr;
+ }
+#endif
+
+ ret = pthread_rwlock_init(&lock->lock, &attr);
+ if (ret) {
+ log_err("pthread_rwlock_init: %s\n", strerror(ret));
+ goto destroy_attr;
+ }
+
+ pthread_rwlockattr_destroy(&attr);
+
+ return lock;
+destroy_attr:
+ pthread_rwlockattr_destroy(&attr);
+err:
+ if (lock)
+ fio_rwlock_remove(lock);
+ return NULL;
}
projects / fio.git / blobdiff