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/*
* Copyright 1999-2014 University of Chicago
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifdef _WIN32
#include "globus_i_xio_win32.h"
#define GlobusLWin32PollQueueInit() \
{ \
globus_l_xio_win32_poll_queue = 0; \
globus_l_xio_win32_poll_queue_tail = &globus_l_xio_win32_poll_queue; \
}
#define GlobusLWin32PollQueueEnqueue(entry) \
{ \
(entry)->next = 0; \
*globus_l_xio_win32_poll_queue_tail = (entry); \
globus_l_xio_win32_poll_queue_tail = &(entry)->next; \
}
#define GlobusLWin32PollQueueDequeue(entry) \
{ \
(entry) = globus_l_xio_win32_poll_queue; \
globus_l_xio_win32_poll_queue = (entry)->next; \
if(!globus_l_xio_win32_poll_queue) \
globus_l_xio_win32_poll_queue_tail = &globus_l_xio_win32_poll_queue;\
}
#define GlobusLWin32PollQueueEmpty() \
(globus_l_xio_win32_poll_queue == 0)
typedef struct globus_l_xio_win32_poll_entry_s
{
globus_callback_func_t callback;
void * user_arg;
struct globus_l_xio_win32_poll_entry_s * next;
} globus_l_xio_win32_poll_entry_t;
static globus_callback_handle_t globus_l_xio_win32_poll_handle;
static win32_mutex_t globus_l_xio_win32_poll_lock;
static HANDLE globus_l_xio_win32_poll_event;
static globus_bool_t globus_l_xio_win32_poll_event_sleeping;
static globus_bool_t globus_l_xio_win32_poll_event_pending;
static globus_l_xio_win32_poll_entry_t * globus_l_xio_win32_poll_queue;
static globus_l_xio_win32_poll_entry_t ** globus_l_xio_win32_poll_queue_tail;
static globus_l_xio_win32_poll_entry_t * globus_l_xio_win32_poll_free;
static
void
globus_l_xio_win32_wakeup_handler(
void * user_arg)
{
GlobusXIOName(globus_l_xio_win32_wakeup_handler);
GlobusXIOSystemDebugEnter();
if(globus_l_xio_win32_poll_event != 0)
{
SetEvent(globus_l_xio_win32_poll_event);
}
GlobusXIOSystemDebugExit();
}
static
void
globus_l_xio_win32_poll(
void * user_arg)
{
GlobusXIOName(globus_l_xio_win32_poll);
GlobusXIOSystemDebugEnter();
win32_mutex_lock(&globus_l_xio_win32_poll_lock);
{
if(GlobusLWin32PollQueueEmpty())
{
globus_reltime_t time_left;
globus_callback_get_timeout(&time_left);
if(globus_reltime_cmp(&time_left, &globus_i_reltime_zero) > 0)
{
DWORD millis = INFINITE;
if(!globus_time_reltime_is_infinity(&time_left))
{
GlobusTimeReltimeToMilliSec(millis, time_left);
}
globus_l_xio_win32_poll_event_sleeping = GLOBUS_TRUE;
win32_mutex_unlock(&globus_l_xio_win32_poll_lock);
WaitForSingleObject(globus_l_xio_win32_poll_event, millis);
win32_mutex_lock(&globus_l_xio_win32_poll_lock);
globus_l_xio_win32_poll_event_sleeping = GLOBUS_FALSE;
globus_l_xio_win32_poll_event_pending = GLOBUS_FALSE;
}
}
while(!GlobusLWin32PollQueueEmpty())
{
globus_l_xio_win32_poll_entry_t * entry;
GlobusLWin32PollQueueDequeue(entry);
win32_mutex_unlock(&globus_l_xio_win32_poll_lock);
entry->callback(entry->user_arg);
win32_mutex_lock(&globus_l_xio_win32_poll_lock);
entry->next = globus_l_xio_win32_poll_free;
globus_l_xio_win32_poll_free = entry;
if(globus_callback_has_time_expired())
{
break;
}
}
}
win32_mutex_unlock(&globus_l_xio_win32_poll_lock);
GlobusXIOSystemDebugExit();
}
int
globus_i_xio_win32_complete_activate(void)
{
globus_result_t result;
globus_reltime_t period;
GlobusXIOName(globus_i_xio_win32_complete_activate);
GlobusXIOSystemDebugEnter();
if (!globus_i_am_only_thread())
{
goto skip_activate;
}
GlobusLWin32PollQueueInit();
win32_mutex_init(&globus_l_xio_win32_poll_lock, 0);
globus_l_xio_win32_poll_event_sleeping = GLOBUS_FALSE;
globus_l_xio_win32_poll_event_pending = GLOBUS_FALSE;
globus_l_xio_win32_poll_free = 0;
globus_l_xio_win32_poll_event = CreateEvent(0, FALSE, FALSE, 0);
if(globus_l_xio_win32_poll_event == 0)
{
goto error_event;
}
GlobusTimeReltimeSet(period, 0, 0);
result = globus_callback_register_periodic(
&globus_l_xio_win32_poll_handle,
0,
&period,
globus_l_xio_win32_poll,
0);
if(result != GLOBUS_SUCCESS)
{
goto error_periodic;
}
globus_callback_add_wakeup_handler(
globus_l_xio_win32_wakeup_handler, 0);
skip_activate:
GlobusXIOSystemDebugExit();
return GLOBUS_SUCCESS;
error_periodic:
CloseHandle(globus_l_xio_win32_poll_event);
globus_l_xio_win32_poll_event = 0;
error_event:
win32_mutex_destroy(&globus_l_xio_win32_poll_lock);
GlobusXIOSystemDebugExitWithError();
return GLOBUS_FAILURE;
}
typedef struct
{
globus_cond_t cond;
globus_mutex_t mutex;
} globus_l_shutdown_info_t;
static
void
globus_l_xio_win32_unregister_poll_cb(
void * user_arg)
{
globus_l_shutdown_info_t * info;
GlobusXIOName(globus_l_xio_win32_unregister_poll_cb);
GlobusXIOSystemDebugEnter();
info = (globus_l_shutdown_info_t *) user_arg;
globus_mutex_lock(&info->mutex);
{
CloseHandle(globus_l_xio_win32_poll_event);
globus_l_xio_win32_poll_event = 0;
globus_cond_signal(&info->cond);
}
globus_mutex_unlock(&info->mutex);
GlobusXIOSystemDebugExit();
}
int
globus_i_xio_win32_complete_deactivate(void)
{
globus_result_t result;
globus_l_shutdown_info_t info;
GlobusXIOName(globus_i_xio_win32_complete_deactivate);
GlobusXIOSystemDebugEnter();
if (!globus_i_am_only_thread())
{
goto skip_deactivate;
}
globus_mutex_init(&info.mutex, NULL);
globus_cond_init(&info.cond, NULL);
globus_mutex_lock(&info.mutex);
{
result = globus_callback_unregister(
globus_l_xio_win32_poll_handle,
globus_l_xio_win32_unregister_poll_cb,
&info,
0);
if(result == GLOBUS_SUCCESS)
{
/* unregister callback destroys this event object */
while(globus_l_xio_win32_poll_event != 0)
{
globus_cond_wait(&info.cond, &info.mutex);
}
}
else
{
globus_mutex_unlock(&info.mutex);
globus_l_xio_win32_unregister_poll_cb(&info);
globus_mutex_lock(&info.mutex);
}
}
globus_mutex_unlock(&info.mutex);
globus_cond_destroy(&info.cond);
globus_mutex_destroy(&info.mutex);
win32_mutex_destroy(&globus_l_xio_win32_poll_lock);
while(globus_l_xio_win32_poll_free)
{
globus_l_xio_win32_poll_entry_t * next =
globus_l_xio_win32_poll_free->next;
globus_free(globus_l_xio_win32_poll_free);
globus_l_xio_win32_poll_free = next;
}
skip_deactivate:
GlobusXIOSystemDebugExit();
return GLOBUS_SUCCESS;
}
globus_result_t
globus_i_xio_win32_complete(
globus_callback_func_t callback,
void * user_arg)
{
globus_l_xio_win32_poll_entry_t * entry;
globus_result_t result;
GlobusXIOName(globus_i_xio_win32_complete);
GlobusXIOSystemDebugEnter();
if (! globus_i_am_only_thread())
{
return globus_callback_register_oneshot(
0,
0,
callback,
user_arg);
}
win32_mutex_lock(&globus_l_xio_win32_poll_lock);
{
if(globus_l_xio_win32_poll_free)
{
entry = globus_l_xio_win32_poll_free;
globus_l_xio_win32_poll_free = entry->next;
}
else
{
entry = (globus_l_xio_win32_poll_entry_t *)
globus_malloc(sizeof(globus_l_xio_win32_poll_entry_t));
if(!entry)
{
result = GlobusXIOErrorMemory("entry");
goto error_malloc;
}
}
entry->callback = callback;
entry->user_arg = user_arg;
GlobusLWin32PollQueueEnqueue(entry);
if(globus_l_xio_win32_poll_event_sleeping &&
!globus_l_xio_win32_poll_event_pending)
{
SetEvent(globus_l_xio_win32_poll_event);
globus_l_xio_win32_poll_event_pending = GLOBUS_TRUE;
}
}
win32_mutex_unlock(&globus_l_xio_win32_poll_lock);
GlobusXIOSystemDebugExit();
return GLOBUS_SUCCESS;
error_malloc:
return result;
}
#endif /* _WIN32 */
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