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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_threading.c
- *
- * This file contain APIs to create, exit and yield a thread.
- */
- #include "api.h"
- #include "pal.h"
- #include "pal_debug.h"
- #include "pal_defs.h"
- #include "pal_error.h"
- #include "pal_internal.h"
- /* PAL call DkThreadCreate: create a thread inside the current
- process */
- PAL_HANDLE
- DkThreadCreate(PAL_PTR addr, PAL_PTR param) {
- ENTER_PAL_CALL(DkThreadCreate);
- PAL_HANDLE handle = NULL;
- int ret = _DkThreadCreate(&handle, (int (*)(void*))addr, (const void*)param);
- if (ret < 0) {
- _DkRaiseFailure(-ret);
- handle = NULL;
- }
- LEAVE_PAL_CALL_RETURN(handle);
- }
- /* PAL call DkThreadDelayExecution. Delay the current thread
- (sleep) for the given duration */
- PAL_NUM
- DkThreadDelayExecution(PAL_NUM duration) {
- ENTER_PAL_CALL(DkThreadDelayExecution);
- unsigned long dur = duration;
- int ret = _DkThreadDelayExecution(&dur);
- if (ret < 0) {
- _DkRaiseFailure(PAL_ERROR_INTERRUPTED);
- duration = dur;
- }
- LEAVE_PAL_CALL_RETURN(duration);
- }
- /* PAL call DkThreadYieldExecution. Yield the execution
- of the current thread. */
- void DkThreadYieldExecution(void) {
- ENTER_PAL_CALL(DkThreadYieldExecution);
- _DkThreadYieldExecution();
- LEAVE_PAL_CALL();
- }
- /* PAL call DkThreadExit: simply exit the current thread
- no matter what */
- noreturn void DkThreadExit(PAL_PTR clear_child_tid) {
- ENTER_PAL_CALL(DkThreadExit);
- _DkThreadExit((int*)clear_child_tid);
- _DkRaiseFailure(PAL_ERROR_NOTKILLABLE);
- while (true)
- /* nothing */;
- LEAVE_PAL_CALL();
- }
- /* PAL call DkThreadResume: resume the execution of a thread
- which is delayed before */
- PAL_BOL DkThreadResume(PAL_HANDLE threadHandle) {
- ENTER_PAL_CALL(DkThreadResume);
- if (!threadHandle || !IS_HANDLE_TYPE(threadHandle, thread)) {
- _DkRaiseFailure(PAL_ERROR_INVAL);
- LEAVE_PAL_CALL_RETURN(PAL_FALSE);
- }
- int ret = _DkThreadResume(threadHandle);
- if (ret < 0) {
- _DkRaiseFailure(PAL_ERROR_DENIED);
- LEAVE_PAL_CALL_RETURN(PAL_FALSE);
- }
- LEAVE_PAL_CALL_RETURN(PAL_TRUE);
- }
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