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- /* -*- mode:c; c-file-style:"k&r"; c-basic-offset: 4; tab-width:4; indent-tabs-mode:nil; mode:auto-fill; fill-column:78; -*- */
- /* vim: set ts=4 sw=4 et tw=78 fo=cqt wm=0: */
- /* Copyright (C) 2014 OSCAR lab, 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 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 General Public License for more details.
- You should have received a copy of the GNU 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 "pal_defs.h"
- #include "pal.h"
- #include "pal_internal.h"
- #include "pal_error.h"
- #include "pal_debug.h"
- #include "api.h"
- /* PAL call DkThreadCreate: create a thread inside the current
- process */
- PAL_HANDLE
- DkThreadCreate (PAL_PTR addr, PAL_PTR param, PAL_FLG flags)
- {
- store_frame(ThreadCreate);
- PAL_HANDLE handle = NULL;
- int ret = _DkThreadCreate (&handle, (int (*)(void *)) addr,
- param, flags);
- if (ret < 0) {
- notify_failure (-ret);
- return NULL;
- }
- return handle;
- }
- PAL_BUF DkThreadPrivate (PAL_BUF addr)
- {
- void * ret = _DkThreadPrivate(addr);
- if (ret == NULL)
- notify_failure(PAL_ERROR_DENIED);
- return ret;
- }
- /* PAL call DkThreadDelayExecution. Delay the current thread
- (sleep) for the given duration */
- PAL_NUM
- DkThreadDelayExecution (PAL_NUM duration)
- {
- store_frame(ThreadDelayExecution);
- unsigned long dur = duration;
- int ret = _DkThreadDelayExecution(&dur);
- if (ret < 0)
- notify_failure(PAL_ERROR_INTERRUPTED);
- return dur;
- }
- /* PAL call DkThreadYieldExecution. Yield the execution
- of the current thread. */
- void DkThreadYieldExecution (void)
- {
- _DkThreadYieldExecution();
- }
- /* PAL call DkThreadExit: simply exit the current thread
- no matter what */
- void DkThreadExit (void)
- {
- store_frame(ThreadExit);
- _DkThreadExit(0);
- notify_failure(PAL_ERROR_NOTKILLABLE);
- }
- /* PAL call DkThreadResume: resume the execution of a thread
- which is delayed before */
- PAL_BOL DkThreadResume (PAL_HANDLE threadHandle)
- {
- store_frame(ThreadResume);
- if (!threadHandle ||
- !IS_HANDLE_TYPE(threadHandle, thread)) {
- notify_failure(PAL_ERROR_INVAL);
- return PAL_FALSE;
- }
- int ret = _DkThreadResume(threadHandle);
- if (ret < 0) {
- notify_failure(PAL_ERROR_DENIED);
- return PAL_FALSE;
- }
- return PAL_TRUE;
- }
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