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-rw-r--r--mutex.c167
1 files changed, 0 insertions, 167 deletions
diff --git a/mutex.c b/mutex.c
deleted file mode 100644
index 03291c7f..00000000
--- a/mutex.c
+++ /dev/null
@@ -1,167 +0,0 @@
-#include <string.h>
-#include <sys/mman.h>
-#include <assert.h>
-
-#include "log.h"
-#include "mutex.h"
-#include "pshared.h"
-#include "os/os.h"
-#include "fio_time.h"
-#include "gettime.h"
-
-void __fio_mutex_remove(struct fio_mutex *mutex)
-{
- assert(mutex->magic == FIO_MUTEX_MAGIC);
- pthread_cond_destroy(&mutex->cond);
-
- /*
- * Ensure any subsequent attempt to grab this mutex will fail
- * with an assert, instead of just silently hanging.
- */
- memset(mutex, 0, sizeof(*mutex));
-}
-
-void fio_mutex_remove(struct fio_mutex *mutex)
-{
- __fio_mutex_remove(mutex);
- munmap((void *) mutex, sizeof(*mutex));
-}
-
-int __fio_mutex_init(struct fio_mutex *mutex, int value)
-{
- int ret;
-
- mutex->value = value;
- mutex->magic = FIO_MUTEX_MAGIC;
-
- ret = mutex_cond_init_pshared(&mutex->lock, &mutex->cond);
- if (ret)
- return ret;
-
- return 0;
-}
-
-struct fio_mutex *fio_mutex_init(int value)
-{
- struct fio_mutex *mutex = NULL;
-
- mutex = (void *) mmap(NULL, sizeof(struct fio_mutex),
- PROT_READ | PROT_WRITE,
- OS_MAP_ANON | MAP_SHARED, -1, 0);
- if (mutex == MAP_FAILED) {
- perror("mmap mutex");
- return NULL;
- }
-
- if (!__fio_mutex_init(mutex, value))
- return mutex;
-
- fio_mutex_remove(mutex);
- return NULL;
-}
-
-static bool mutex_timed_out(struct timespec *t, unsigned int msecs)
-{
- struct timeval tv;
- struct timespec now;
-
- gettimeofday(&tv, NULL);
- now.tv_sec = tv.tv_sec;
- now.tv_nsec = tv.tv_usec * 1000;
-
- return mtime_since(t, &now) >= msecs;
-}
-
-int fio_mutex_down_timeout(struct fio_mutex *mutex, unsigned int msecs)
-{
- struct timeval tv_s;
- struct timespec base;
- struct timespec t;
- int ret = 0;
-
- assert(mutex->magic == FIO_MUTEX_MAGIC);
-
- gettimeofday(&tv_s, NULL);
- base.tv_sec = t.tv_sec = tv_s.tv_sec;
- base.tv_nsec = t.tv_nsec = tv_s.tv_usec * 1000;
-
- t.tv_sec += msecs / 1000;
- t.tv_nsec += ((msecs * 1000000ULL) % 1000000000);
- if (t.tv_nsec >= 1000000000) {
- t.tv_nsec -= 1000000000;
- t.tv_sec++;
- }
-
- pthread_mutex_lock(&mutex->lock);
-
- mutex->waiters++;
- while (!mutex->value && !ret) {
- /*
- * 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(&base, msecs))
- ret = 0;
- }
- mutex->waiters--;
-
- if (!ret) {
- mutex->value--;
- pthread_mutex_unlock(&mutex->lock);
- return 0;
- }
-
- pthread_mutex_unlock(&mutex->lock);
- return ret;
-}
-
-bool fio_mutex_down_trylock(struct fio_mutex *mutex)
-{
- bool ret = true;
-
- assert(mutex->magic == FIO_MUTEX_MAGIC);
-
- pthread_mutex_lock(&mutex->lock);
- if (mutex->value) {
- mutex->value--;
- ret = false;
- }
- pthread_mutex_unlock(&mutex->lock);
-
- return ret;
-}
-
-void fio_mutex_down(struct fio_mutex *mutex)
-{
- assert(mutex->magic == FIO_MUTEX_MAGIC);
-
- pthread_mutex_lock(&mutex->lock);
-
- while (!mutex->value) {
- mutex->waiters++;
- pthread_cond_wait(&mutex->cond, &mutex->lock);
- mutex->waiters--;
- }
-
- mutex->value--;
- pthread_mutex_unlock(&mutex->lock);
-}
-
-void fio_mutex_up(struct fio_mutex *mutex)
-{
- int do_wake = 0;
-
- assert(mutex->magic == FIO_MUTEX_MAGIC);
-
- pthread_mutex_lock(&mutex->lock);
- read_barrier();
- if (!mutex->value && mutex->waiters)
- do_wake = 1;
- mutex->value++;
-
- if (do_wake)
- pthread_cond_signal(&mutex->cond);
-
- pthread_mutex_unlock(&mutex->lock);
-}