Prepare SPL repo to merge with ZFS repo

[mirror_spl.git] / include / spl / sys / condvar.h

diff --git a/include/spl/sys/condvar.h b/include/spl/sys/condvar.h
new file mode 100644 (file)
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--- /dev/null
+++ b/include/spl/sys/condvar.h
@@ -0,0 +1,80 @@
+/*
+ *  Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
+ *  Copyright (C) 2007 The Regents of the University of California.
+ *  Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
+ *  Written by Brian Behlendorf <behlendorf1@llnl.gov>.
+ *  UCRL-CODE-235197
+ *
+ *  This file is part of the SPL, Solaris Porting Layer.
+ *  For details, see <http://zfsonlinux.org/>.
+ *
+ *  The SPL is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License as published by the
+ *  Free Software Foundation; either version 2 of the License, or (at your
+ *  option) any later version.
+ *
+ *  The SPL is distributed in the hope that it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ *  for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with the SPL.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _SPL_CONDVAR_H
+#define        _SPL_CONDVAR_H
+
+#include <linux/module.h>
+#include <sys/kmem.h>
+#include <sys/mutex.h>
+#include <sys/callo.h>
+#include <sys/wait.h>
+
+/*
+ * The kcondvar_t struct is protected by mutex taken externally before
+ * calling any of the wait/signal funs, and passed into the wait funs.
+ */
+#define        CV_MAGIC                        0x346545f4
+#define        CV_DESTROY                      0x346545f5
+
+typedef struct {
+       int cv_magic;
+       spl_wait_queue_head_t cv_event;
+       spl_wait_queue_head_t cv_destroy;
+       atomic_t cv_refs;
+       atomic_t cv_waiters;
+       kmutex_t *cv_mutex;
+} kcondvar_t;
+
+typedef enum { CV_DEFAULT = 0, CV_DRIVER } kcv_type_t;
+
+extern void __cv_init(kcondvar_t *, char *, kcv_type_t, void *);
+extern void __cv_destroy(kcondvar_t *);
+extern void __cv_wait(kcondvar_t *, kmutex_t *);
+extern void __cv_wait_io(kcondvar_t *, kmutex_t *);
+extern void __cv_wait_sig(kcondvar_t *, kmutex_t *);
+extern clock_t __cv_timedwait(kcondvar_t *, kmutex_t *, clock_t);
+extern clock_t __cv_timedwait_io(kcondvar_t *, kmutex_t *, clock_t);
+extern clock_t __cv_timedwait_sig(kcondvar_t *, kmutex_t *, clock_t);
+extern clock_t cv_timedwait_hires(kcondvar_t *, kmutex_t *, hrtime_t,
+    hrtime_t res, int flag);
+extern clock_t cv_timedwait_sig_hires(kcondvar_t *, kmutex_t *, hrtime_t,
+    hrtime_t res, int flag);
+extern void __cv_signal(kcondvar_t *);
+extern void __cv_broadcast(kcondvar_t *c);
+
+#define        cv_init(cvp, name, type, arg)           __cv_init(cvp, name, type, arg)
+#define        cv_destroy(cvp)                         __cv_destroy(cvp)
+#define        cv_wait(cvp, mp)                        __cv_wait(cvp, mp)
+#define        cv_wait_io(cvp, mp)                     __cv_wait_io(cvp, mp)
+#define        cv_wait_sig(cvp, mp)                    __cv_wait_sig(cvp, mp)
+#define        cv_wait_interruptible(cvp, mp)          cv_wait_sig(cvp, mp)
+#define        cv_timedwait(cvp, mp, t)                __cv_timedwait(cvp, mp, t)
+#define        cv_timedwait_io(cvp, mp, t)             __cv_timedwait_io(cvp, mp, t)
+#define        cv_timedwait_sig(cvp, mp, t)            __cv_timedwait_sig(cvp, mp, t)
+#define        cv_timedwait_interruptible(cvp, mp, t)  cv_timedwait_sig(cvp, mp, t)
+#define        cv_signal(cvp)                          __cv_signal(cvp)
+#define        cv_broadcast(cvp)                       __cv_broadcast(cvp)
+
+#endif /* _SPL_CONDVAR_H */