1 files changed, 47 insertions, 0 deletions

diff --git a/lib/libnetmap/nmctx-pthreads.c b/lib/libnetmap/nmctx-pthreads.c
new file mode 100644
index 000000000000..8aa9322369c1
--- /dev/null
+++ b/lib/libnetmap/nmctx-pthreads.c
@@ -0,0 +1,47 @@
+/* $FreeBSD$ */
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <net/netmap_user.h>
+#include <pthread.h>
+#include "libnetmap.h"
+
+struct nmctx_pthread {
+	struct nmctx up;
+	pthread_mutex_t mutex;
+};
+
+static struct nmctx_pthread nmctx_pthreadsafe;
+
+static void
+nmctx_pthread_lock(struct nmctx *ctx, int lock)
+{
+	struct nmctx_pthread *ctxp =
+		(struct nmctx_pthread *)ctx;
+	if (lock) {
+		pthread_mutex_lock(&ctxp->mutex);
+	} else {
+		pthread_mutex_unlock(&ctxp->mutex);
+	}
+}
+
+void __attribute__ ((constructor))
+nmctx_set_threadsafe(void)
+{
+	struct nmctx *old;
+
+	pthread_mutex_init(&nmctx_pthreadsafe.mutex, NULL);
+	old = nmctx_set_default(&nmctx_pthreadsafe.up);
+	nmctx_pthreadsafe.up = *old;
+	nmctx_pthreadsafe.up.lock = nmctx_pthread_lock;
+}
+
+int nmctx_threadsafe;