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/*********************************************************
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* Copyright (C) 2002 VMware, Inc. All rights reserved.
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation version 2 and no later version.
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*********************************************************/
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#ifndef __COMPAT_WAIT_H__
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# define __COMPAT_WAIT_H__
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#include <linux/wait.h>
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#include <linux/poll.h>
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#include <linux/file.h>
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#include "compat_file.h"
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* The DECLARE_WAITQUEUE() API appeared in 2.3.1
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* It was back ported in 2.2.18
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#ifndef DECLARE_WAITQUEUE
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typedef struct wait_queue *wait_queue_head_t;
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# define init_waitqueue_head(_headPtr) *(_headPtr) = NULL
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# define DECLARE_WAITQUEUE(_var, _task) \
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struct wait_queue _var = {_task, NULL, }
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typedef struct wait_queue wait_queue_t;
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# define init_waitqueue_entry(_wait, _task) ((_wait)->task = (_task))
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* The 'struct poll_wqueues' appeared in 2.5.48, when global
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* /dev/epoll interface was added. It was backported to the
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#ifdef VMW_HAVE_EPOLL // {
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#define compat_poll_wqueues struct poll_wqueues
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#define compat_poll_wqueues poll_table
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#ifdef VMW_HAVE_EPOLL // {
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/* If prototype does not match, build will abort here */
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extern void poll_initwait(compat_poll_wqueues *);
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#define compat_poll_initwait(wait, table) ( \
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poll_initwait((table)), \
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(wait) = &(table)->pt \
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#define compat_poll_freewait(wait, table) ( \
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poll_freewait((table)) \
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#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 4, 0) // {
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/* If prototype does not match, build will abort here */
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extern void poll_initwait(compat_poll_wqueues *);
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#define compat_poll_initwait(wait, table) ( \
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#define compat_poll_freewait(wait, table) ( \
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poll_freewait((table)) \
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#define compat_poll_initwait(wait, table) ( \
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(wait) = (table), /* confuse compiler */ \
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(wait) = (poll_table *) __get_free_page(GFP_KERNEL), \
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(wait)->entry = (struct poll_table_entry *)((wait) + 1), \
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poll_freewait(poll_table *wait)
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struct poll_table_entry * entry;
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entry = wait->entry + wait->nr;
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while (wait->nr > 0) {
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remove_wait_queue(entry->wait_address, &entry->wait);
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compat_fput(entry->filp);
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free_page((unsigned long) old);
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#define compat_poll_freewait(wait, table) ( \
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poll_freewait((wait)) \
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* The wait_event_interruptible_timeout() interface is not
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* defined in pre-2.6 kernels.
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#ifndef wait_event_interruptible_timeout
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#define __wait_event_interruptible_timeout(wq, condition, ret) \
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wait_queue_t __wait; \
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init_waitqueue_entry(&__wait, current); \
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add_wait_queue(&wq, &__wait); \
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set_current_state(TASK_INTERRUPTIBLE); \
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if (!signal_pending(current)) { \
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ret = schedule_timeout(ret); \
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ret = -ERESTARTSYS; \
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set_current_state(TASK_RUNNING); \
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remove_wait_queue(&wq, &__wait); \
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#define wait_event_interruptible_timeout(wq, condition, timeout) \
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long __ret = timeout; \
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__wait_event_interruptible_timeout(wq, condition, __ret); \
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* The wait_event_timeout() interface is not
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* defined in pre-2.6 kernels.
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#ifndef wait_event_timeout
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#define __wait_event_timeout(wq, condition, ret) \
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wait_queue_t __wait; \
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init_waitqueue_entry(&__wait, current); \
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add_wait_queue(&wq, &__wait); \
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set_current_state(TASK_UNINTERRUPTIBLE); \
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ret = schedule_timeout(ret); \
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set_current_state(TASK_RUNNING); \
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remove_wait_queue(&wq, &__wait); \
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#define wait_event_timeout(wq, condition, timeout) \
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long __ret = timeout; \
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__wait_event_timeout(wq, condition, __ret); \
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* DEFINE_WAIT() and friends were added in 2.5.39 and backported to 2.4.28.
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* Unfortunately it is not true. While some distros may have done it the
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* change has never made it into vanilla 2.4 kernel. Instead of testing
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* particular kernel versions let's just test for presence of DEFINE_WAIT
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* when figuring out whether we need to provide replacement implementation
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* or simply alias existing one.
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# define COMPAT_DEFINE_WAIT(_wait) \
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DECLARE_WAITQUEUE(_wait, current)
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# define compat_init_prepare_to_wait(_sleep, _wait, _state) \
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__set_current_state(_state); \
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add_wait_queue(_sleep, _wait); \
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# define compat_cont_prepare_to_wait(_sleep, _wait, _state) \
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set_current_state(_state)
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# define compat_finish_wait(_sleep, _wait, _state) \
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__set_current_state(_state); \
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remove_wait_queue(_sleep, _wait); \
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# define COMPAT_DEFINE_WAIT(_wait) \
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# define compat_init_prepare_to_wait(_sleep, _wait, _state) \
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prepare_to_wait(_sleep, _wait, _state)
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# define compat_cont_prepare_to_wait(_sleep, _wait, _state) \
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prepare_to_wait(_sleep, _wait, _state)
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# define compat_finish_wait(_sleep, _wait, _state) \
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finish_wait(_sleep, _wait)
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#endif /* #ifndef DEFINE_WAIT */
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#endif /* __COMPAT_WAIT_H__ */
added
removed
modules/linux/vmci/compat_wait.h
