Add lib/ff_subr_epoch.c.

lib/ff_subr_epoch.c

@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2021 THL A29 Limited, a Tencent company.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Derived in part from libplebnet's pn_kern_subr.c.
+ */
+
+#include <sys/cdefs.h>
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/ktr.h>
+#include <sys/limits.h>
+#include <sys/lock.h>
+#include <sys/mutex.h>
+#include <sys/proc.h>
+#include <sys/malloc.h>
+#include <sys/resourcevar.h>
+#include <sys/sched.h>
+#include <sys/sysctl.h>
+#include <sys/uio.h>
+#include <sys/epoch.h>
+
+#include "ff_host_interface.h"
+
+struct epoch {
+};
+
+static struct epoch epoch_array[1];
+
+void
+_epoch_enter_preempt(epoch_t epoch, epoch_tracker_t et EPOCH_FILE_LINE)
+{
+
+}
+
+void
+_epoch_exit_preempt(epoch_t epoch, epoch_tracker_t et EPOCH_FILE_LINE)
+{
+
+}
+
+void
+epoch_wait_preempt(epoch_t epoch)
+{
+
+}
+
+void
+epoch_call(epoch_t epoch, epoch_callback_t callback, epoch_context_t ctx)
+{
+
+}
+
+epoch_t
+epoch_alloc(const char *name, int flags)
+{
+    return &epoch_array[0];
+}
+
+void
+epoch_drain_callbacks(epoch_t epoch)
+{
+
+}