X-Git-Url: https://git.kernel.dk/?a=blobdiff_plain;f=mutex.c;h=abe073f4ffdf7d49ee92500db8d89e254def2852;hb=7a4b80a14c6ac6d47d486b1f5d1f166fa7065ee3;hp=7d072186686d21779280cf28fe10d8ed867f5e63;hpb=4fa6d0f862ad56382199fbb68c05da484d3f7e20;p=fio.git

diff --git a/mutex.c b/mutex.c
index 7d072186..abe073f4 100644
--- a/mutex.c
+++ b/mutex.c
@@ -3,12 +3,15 @@
 #include <unistd.h>
 #include <stdlib.h>
 #include <fcntl.h>
+#include <time.h>
 #include <pthread.h>
 #include <sys/mman.h>
 
 #include "log.h"
 #include "mutex.h"
 #include "arch/arch.h"
+#include "os/os.h"
+#include "helpers.h"
 
 void fio_mutex_remove(struct fio_mutex *mutex)
 {
@@ -22,7 +25,7 @@ struct fio_mutex *fio_mutex_init(int value)
 	struct fio_mutex *mutex = NULL;
 	pthread_mutexattr_t attr;
 	pthread_condattr_t cond;
-	int fd, ret;
+	int fd, ret, mflag;
 
 	fd = mkstemp(mutex_name);
 	if (fd < 0) {
@@ -48,19 +51,32 @@ struct fio_mutex *fio_mutex_init(int value)
 	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
+
 	ret = pthread_mutexattr_init(&attr);
 	if (ret) {
 		log_err("pthread_mutexattr_init: %s\n", strerror(ret));
 		goto err;
 	}
-	ret = pthread_mutexattr_setpshared(&attr, PTHREAD_PROCESS_SHARED);
+#ifdef FIO_HAVE_PSHARED_MUTEX
+	ret = pthread_mutexattr_setpshared(&attr, mflag);
 	if (ret) {
 		log_err("pthread_mutexattr_setpshared: %s\n", strerror(ret));
 		goto err;
 	}
+#endif
 
 	pthread_condattr_init(&cond);
-	pthread_condattr_setpshared(&cond, PTHREAD_PROCESS_SHARED);
+#ifdef FIO_HAVE_PSHARED_MUTEX
+	pthread_condattr_setpshared(&cond, mflag);
+#endif
 	pthread_cond_init(&mutex->cond, &cond);
 
 	ret = pthread_mutex_init(&mutex->lock, &attr);
@@ -78,6 +94,30 @@ err:
 	return NULL;
 }
 
+int fio_mutex_down_timeout(struct fio_mutex *mutex, unsigned int seconds)
+{
+	struct timespec t;
+	int ret = 0;
+
+	clock_gettime(CLOCK_REALTIME, &t);
+	t.tv_sec += seconds;
+
+	pthread_mutex_lock(&mutex->lock);
+
+	while (!mutex->value && !ret) {
+		mutex->waiters++;
+		ret = pthread_cond_timedwait(&mutex->cond, &mutex->lock, &t);
+		mutex->waiters--;
+	}
+
+	if (!ret) {
+		mutex->value--;
+		pthread_mutex_unlock(&mutex->lock);
+	}
+
+	return ret;
+}
+
 void fio_mutex_down(struct fio_mutex *mutex)
 {
 	pthread_mutex_lock(&mutex->lock);