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https://github.com/VincentWei/MiniGUI.git
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453 lines
11 KiB
C
453 lines
11 KiB
C
///////////////////////////////////////////////////////////////////////////////
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//
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// IMPORTANT NOTICE
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//
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// The following open source license statement does not apply to any
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// entity in the Exception List published by FMSoft.
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//
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// For more information, please visit:
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//
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// https://www.fmsoft.cn/exception-list
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//
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//////////////////////////////////////////////////////////////////////////////
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/*
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* This file is part of MiniGUI, a mature cross-platform windowing
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* and Graphics User Interface (GUI) support system for embedded systems
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* and smart IoT devices.
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*
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* Copyright (C) 2002~2018, Beijing FMSoft Technologies Co., Ltd.
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* Copyright (C) 1998~2002, WEI Yongming
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* Or,
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*
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* As this program is a library, any link to this program must follow
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* GNU General Public License version 3 (GPLv3). If you cannot accept
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* GPLv3, you need to be licensed from FMSoft.
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*
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* If you have got a commercial license of this program, please use it
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* under the terms and conditions of the commercial license.
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*
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* For more information about the commercial license, please refer to
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* <http://www.minigui.com/blog/minigui-licensing-policy/>.
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*/
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/*
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** ucos2_mutex.c: implementation of pthread mutex function under uC/OS-II.
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**
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** Current maintainer: Wei Yongming
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**
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** Create date: 2004-02-02
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*/
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#include "mgconfig.h"
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#if defined(__UCOSII__) && defined(_MGUSE_OWN_PTHREAD)
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#include <errno.h>
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#include "os_cpu.h"
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#include "os_cfg.h"
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#include "ucos_ii.h"
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#define _HAVE_TYPE_BYTE 1
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#define _HAVE_TYPE_WORD 1
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#define _HAVE_TYPE_LONG 1
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#include "common.h"
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#include "own_stdio.h"
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//#define USE_UCOS2_MUTEX 1
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#undef USE_UCOS2_MUTEX
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// -------------------------------------------------------------------------
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// Internal definitions
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#define _MACRO_START do {
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#define _MACRO_END } while (0);
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#define PTHREAD_ENTRY()
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#define PTHREAD_CHECK(arg) \
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_MACRO_START \
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if (arg == NULL) { \
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errno = EINVAL; \
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return -1; \
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} \
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_MACRO_END
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// Do a semaphore package defined return. This requires the error code
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// to be placed in errno, and if it is non-zero, -1 returned as the
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// result of the function. This also gives us a place to put any
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// generic tidyup handling needed for things like signal delivery and
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// cancellation.
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#define PTHREAD_RETURN(err) \
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_MACRO_START \
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int __retval = 0; \
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if( err != 0 ) __retval = -1, errno = err; \
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return __retval; \
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_MACRO_END
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//=============================================================================
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// Mutexes
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//-----------------------------------------------------------------------------
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// Mutex attributes manipulation functions
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//-----------------------------------------------------------------------------
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// Initialize attribute object
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int pthread_mutexattr_init ( pthread_mutexattr_t *attr)
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{
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PTHREAD_ENTRY();
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PTHREAD_CHECK(attr);
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attr->prio = OS_LOWEST_PRIO;
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//attr->prio = MINIGUI_HIGHEST_MUTEXT_PRIO;
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PTHREAD_RETURN(0);
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}
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//-----------------------------------------------------------------------------
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// Destroy attribute object
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int pthread_mutexattr_destroy ( pthread_mutexattr_t *attr)
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{
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PTHREAD_ENTRY();
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PTHREAD_CHECK(attr);
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// Nothing to do here...
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PTHREAD_RETURN(0);
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}
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//-----------------------------------------------------------------------------
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// Optional functions depending on priority inversion protection options.
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int pthread_mutexattr_setpriority ( pthread_mutexattr_t *attr, int priority)
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{
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PTHREAD_ENTRY();
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PTHREAD_CHECK(attr);
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if (priority < 0 || priority >= OS_LOWEST_PRIO) {
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PTHREAD_RETURN(EINVAL);
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}
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attr->prio = (INT8U) priority;
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PTHREAD_RETURN(0);
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}
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// Get priority
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int pthread_mutexattr_getpriority ( pthread_mutexattr_t *attr, int* priority)
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{
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PTHREAD_ENTRY();
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PTHREAD_CHECK(attr);
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*priority = attr->prio;
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PTHREAD_RETURN(0);
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}
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//-----------------------------------------------------------------------------
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// Mutex functions
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//-----------------------------------------------------------------------------
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// Initialize mutex. If mutex_attr is NULL, use default attributes.
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int pthread_mutex_init (pthread_mutex_t *mutex,
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const pthread_mutexattr_t *mutex_attr)
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{
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pthread_mutexattr_t use_attr;
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#if 0
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PTHREAD_ENTRY();
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PTHREAD_CHECK( mutex );
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#endif
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// Set up the attributes we are going to use
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if( mutex_attr == NULL )
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pthread_mutexattr_init( &use_attr );
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else use_attr = *mutex_attr;
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#if USE_UCOS2_MUTEX
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{
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INT8U err;
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mutex->os_mutex = OSMutexCreate (use_attr.prio, &err);
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if (err == OS_NO_ERR) {
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PTHREAD_RETURN(0);
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}
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}
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#else
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mutex->os_mutex = OSSemCreate (1);
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if (mutex->os_mutex)
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PTHREAD_RETURN(0);
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#endif
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PTHREAD_RETURN(ENOMEM);
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}
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//-----------------------------------------------------------------------------
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// Destroy mutex.
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int pthread_mutex_destroy (pthread_mutex_t *mutex)
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{
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INT8U err;
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int errval = EINVAL;
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PTHREAD_ENTRY();
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PTHREAD_CHECK( mutex );
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#if USE_UCOS2_MUTEX
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OSMutexDel (mutex->os_mutex, OS_DEL_NO_PEND, &err);
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#else
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OSSemDel (mutex->os_mutex, OS_DEL_NO_PEND, &err);
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#endif
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switch (err) {
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case OS_ERR_TASK_WAITING:
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errval = EBUSY;
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break;
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case OS_NO_ERR:
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errval = 0;
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break;
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}
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PTHREAD_RETURN(errval);
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}
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//-----------------------------------------------------------------------------
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// Lock mutex, waiting for it if necessary.
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int pthread_mutex_lock (pthread_mutex_t *mutex)
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{
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INT8U err;
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int retval = 0;
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PTHREAD_ENTRY();
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PTHREAD_CHECK( mutex );
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#if USE_UCOS2_MUTEX
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OSMutexPend (mutex->os_mutex, 0, &err);
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#else
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OSSemPend (mutex->os_mutex, 0, &err);
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#endif
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if (err != OS_NO_ERR)
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retval = EINVAL;
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PTHREAD_RETURN(retval);
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}
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//-----------------------------------------------------------------------------
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// Try to lock mutex.
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int pthread_mutex_trylock (pthread_mutex_t *mutex)
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{
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INT16U ret;
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PTHREAD_ENTRY();
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PTHREAD_CHECK( mutex );
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#if USE_UCOS2_MUTEX
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{
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INT8U err;
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ret = OSMutexAccept (mutex->os_mutex, &err);
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}
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#else
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ret = OSSemAccept (mutex->os_mutex);
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#endif
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if (ret == 0)
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PTHREAD_RETURN(EBUSY);
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PTHREAD_RETURN(0);
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}
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//-----------------------------------------------------------------------------
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// Unlock mutex.
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int pthread_mutex_unlock (pthread_mutex_t *mutex)
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{
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INT8U err;
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PTHREAD_ENTRY();
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PTHREAD_CHECK( mutex );
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#if USE_UCOS2_MUTEX
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err = OSMutexPost (mutex->os_mutex);
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#else
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err = OSSemPost (mutex->os_mutex);
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#endif
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if (err != OS_NO_ERR)
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PTHREAD_RETURN(EINVAL);
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PTHREAD_RETURN(0);
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}
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#if 0 /* We do not implement pthread condition variable */
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//=============================================================================
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// Condition Variables
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//-----------------------------------------------------------------------------
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// Attribute manipulation functions
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// We do not actually support any attributes at present, so these do nothing.
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//-----------------------------------------------------------------------------
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// Initialize condition variable attributes
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int pthread_condattr_init (pthread_condattr_t *attr)
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{
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PTHREAD_ENTRY ();
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PTHREAD_CHECK (attr);
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// There are no condition variable attributes at present
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PTHREAD_RETURN (0);
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}
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//-----------------------------------------------------------------------------
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// Destroy condition variable attributes
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int pthread_condattr_destroy (pthread_condattr_t *attr)
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{
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PTHREAD_ENTRY ();
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PTHREAD_CHECK (attr);
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// nothing to do here...
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PTHREAD_RETURN (0);
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}
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//-----------------------------------------------------------------------------
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// Condition variable functions
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//-----------------------------------------------------------------------------
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// Initialize condition variable.
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int pthread_cond_init (pthread_cond_t *cond,
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const pthread_condattr_t *attr)
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{
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PTHREAD_ENTRY ();
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PTHREAD_CHECK (cond);
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PTHREAD_RETURN (0);
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}
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//-----------------------------------------------------------------------------
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// Destroy condition variable.
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int pthread_cond_destroy (pthread_cond_t *cond)
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{
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PTHREAD_ENTRY ();
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PTHREAD_CHECK (cond);
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// TODO:
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PTHREAD_RETURN (0);
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}
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//-----------------------------------------------------------------------------
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// Wake up one thread waiting for condition variable
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int pthread_cond_signal (pthread_cond_t *cond)
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{
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PTHREAD_ENTRY ();
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PTHREAD_CHECK (cond);
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// TODO:
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PTHREAD_RETURN (0);
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}
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//-----------------------------------------------------------------------------
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// Wake up all threads waiting for condition variable
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int pthread_cond_broadcast (pthread_cond_t *cond)
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{
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PTHREAD_ENTRY ();
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PTHREAD_CHECK (cond);
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// TODO:
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PTHREAD_RETURN (0);
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}
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//-----------------------------------------------------------------------------
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// Block on condition variable until signalled. The mutex is
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// assumed to be locked before this call, will be unlocked
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// during the wait, and will be re-locked on wakeup.
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int pthread_cond_wait (pthread_cond_t *cond,
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pthread_mutex_t *mutex)
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{
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PTHREAD_ENTRY ();
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// check for cancellation first.
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PTHREAD_TESTCANCEL ();
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PTHREAD_CHECK (cond);
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PTHREAD_CHECK (mutex);
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// check if we were woken because we were being cancelled
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PTHREAD_TESTCANCEL ();
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PTHREAD_RETURN (0);
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}
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//-----------------------------------------------------------------------------
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// Block on condition variable until signalled, or the timeout expires.
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int pthread_cond_timedwait (pthread_cond_t *cond,
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pthread_mutex_t *mutex,
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const struct timespec *abstime)
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{
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PTHREAD_ENTRY ();
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// check for cancellation first.
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PTHREAD_TESTCANCEL ();
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PTHREAD_CHECK (cond);
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PTHREAD_CHECK (mutex);
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PTHREAD_CHECK (abstime);
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// check if we were woken because we were being cancelled
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PTHREAD_TESTCANCEL ();
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if (get_wake_reason == TIMEOUT)
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PTHREAD_RETURN (ETIMEDOUT);
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else
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PTHREAD_RETURN (0);
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}
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#endif /* We do not implement pthread condition variable */
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#endif /* __UCOSII__ && _MGUSE_OWN_PTHREAD */
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