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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /fs/jfs/jfs_lock.h
Initial import
Diffstat (limited to 'fs/jfs/jfs_lock.h')
-rw-r--r--fs/jfs/jfs_lock.h52
1 files changed, 52 insertions, 0 deletions
diff --git a/fs/jfs/jfs_lock.h b/fs/jfs/jfs_lock.h
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+++ b/fs/jfs/jfs_lock.h
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+/*
+ * Copyright (C) International Business Machines Corp., 2000-2001
+ * Portions Copyright (C) Christoph Hellwig, 2001-2002
+ *
+ * This program 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.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#ifndef _H_JFS_LOCK
+#define _H_JFS_LOCK
+
+#include <linux/spinlock.h>
+#include <linux/mutex.h>
+#include <linux/sched.h>
+
+/*
+ * jfs_lock.h
+ */
+
+/*
+ * Conditional sleep where condition is protected by spinlock
+ *
+ * lock_cmd and unlock_cmd take and release the spinlock
+ */
+#define __SLEEP_COND(wq, cond, lock_cmd, unlock_cmd) \
+do { \
+ DECLARE_WAITQUEUE(__wait, current); \
+ \
+ add_wait_queue(&wq, &__wait); \
+ for (;;) { \
+ set_current_state(TASK_UNINTERRUPTIBLE);\
+ if (cond) \
+ break; \
+ unlock_cmd; \
+ io_schedule(); \
+ lock_cmd; \
+ } \
+ __set_current_state(TASK_RUNNING); \
+ remove_wait_queue(&wq, &__wait); \
+} while (0)
+
+#endif /* _H_JFS_LOCK */