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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();
- }
- /* Wait on a synchronization handle and return true if this handle's event was triggered,
- * otherwise return false and additionally raise failure. */
- PAL_BOL DkSynchronizationObjectWait(PAL_HANDLE handle, PAL_NUM timeout_us) {
- ENTER_PAL_CALL(DkSynchronizationObjectWait);
- if (!handle) {
- _DkRaiseFailure(PAL_ERROR_INVAL);
- LEAVE_PAL_CALL_RETURN(NULL);
- }
- int ret = _DkSynchronizationObjectWait(handle, timeout_us);
- if (ret < 0) {
- _DkRaiseFailure(-ret);
- LEAVE_PAL_CALL_RETURN(PAL_FALSE);
- }
- LEAVE_PAL_CALL_RETURN(PAL_TRUE);
- }
- /* 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 DkStreamsWaitEvents(PAL_NUM count, PAL_HANDLE* handle_array, PAL_FLG* events,
- PAL_FLG* ret_events, PAL_NUM timeout_us) {
- ENTER_PAL_CALL(DkStreamsWaitEvents);
- 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 = _DkStreamsWaitEvents(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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