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- /* Copyright (C) 2014 Stony Brook University
- This file is part of Graphene Library OS.
- Graphene Library OS is free software: you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public License
- as published by the Free Software Foundation, either version 3 of the
- License, or (at your option) any later version.
- Graphene Library OS 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 Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>. */
- /*
- * db_object.c
- *
- * This file contains APIs for closing or polling PAL handles.
- */
- #include "api.h"
- #include "atomic.h"
- #include "pal.h"
- #include "pal_debug.h"
- #include "pal_defs.h"
- #include "pal_error.h"
- #include "pal_internal.h"
- /* Deprecated DkObjectReference. */
- int _DkObjectClose(PAL_HANDLE objectHandle) {
- const struct handle_ops* ops = HANDLE_OPS(objectHandle);
- if (!ops)
- return -PAL_ERROR_BADHANDLE;
- int ret = 0;
- /* if the operation 'close' is defined, call the function. */
- if (ops->close)
- ret = ops->close(objectHandle);
- /*
- * Chia-Che 12/7/2017:
- * _DkObjectClose will free the object, unless the handle has a 'close' operation, and the
- * operation returns a non-zero value (e.g., 1 for skipping free() or -ERRNO).
- */
- if (!ret)
- free(objectHandle);
- return ret;
- }
- /* PAL call DkObjectClose: Close the given object handle. */
- void DkObjectClose(PAL_HANDLE objectHandle) {
- ENTER_PAL_CALL(DkObjectClose);
- if (!objectHandle) {
- _DkRaiseFailure(PAL_ERROR_INVAL);
- LEAVE_PAL_CALL();
- }
- int ret = _DkObjectClose(objectHandle);
- if (ret < 0)
- _DkRaiseFailure(-ret);
- LEAVE_PAL_CALL();
- }
- /* PAL call DkObjectsWaitAny: wait for any of the handles in the handle array. The wait can be timed
- * out, unless NO_TIMEOUT is given for the timeout_us argument. */
- PAL_HANDLE
- DkObjectsWaitAny(PAL_NUM count, PAL_HANDLE* handle_array, PAL_NUM timeout_us) {
- ENTER_PAL_CALL(DkObjectsWaitAny);
- if (!count || !handle_array) {
- _DkRaiseFailure(PAL_ERROR_INVAL);
- LEAVE_PAL_CALL_RETURN(NULL);
- }
- for (PAL_NUM i = 0; i < count; i++)
- if (UNKNOWN_HANDLE(handle_array[i])) {
- _DkRaiseFailure(PAL_ERROR_INVAL);
- LEAVE_PAL_CALL_RETURN(NULL);
- }
- PAL_HANDLE polled = NULL;
- int ret = _DkObjectsWaitAny(count, handle_array, timeout_us, &polled);
- if (ret < 0) {
- _DkRaiseFailure(-ret);
- polled = NULL;
- }
- LEAVE_PAL_CALL_RETURN(polled);
- }
- /* Wait for user-specified events of handles in the handle array. The wait can be timed out, unless
- * NO_TIMEOUT is given in the timeout_us argument. Returns PAL_TRUE if waiting was successful. */
- PAL_BOL DkObjectsWaitEvents(PAL_NUM count, PAL_HANDLE* handle_array, PAL_FLG* events,
- PAL_FLG* ret_events, PAL_NUM timeout_us) {
- ENTER_PAL_CALL(DkObjectsWaitEvents);
- if (!count || !handle_array || !events || !ret_events) {
- _DkRaiseFailure(PAL_ERROR_INVAL);
- LEAVE_PAL_CALL_RETURN(PAL_FALSE);
- }
- for (PAL_NUM i = 0; i < count; i++) {
- if (UNKNOWN_HANDLE(handle_array[i])) {
- _DkRaiseFailure(PAL_ERROR_INVAL);
- LEAVE_PAL_CALL_RETURN(PAL_FALSE);
- }
- }
- int ret = _DkObjectsWaitEvents(count, handle_array, events, ret_events, timeout_us);
- if (ret < 0) {
- _DkRaiseFailure(-ret);
- LEAVE_PAL_CALL_RETURN(PAL_FALSE);
- }
- LEAVE_PAL_CALL_RETURN(PAL_TRUE);
- }
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