mirror of
https://github.com/VincentWei/MiniGUI.git
synced 2026-02-07 02:52:42 +08:00
161 lines
4.0 KiB
C
161 lines
4.0 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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** drawsemop.h: operations for drawing semaphore.
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**
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*/
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#ifndef GUI_DRAWSEMOP_H
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#define GUI_DRAWSEMOP_H
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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#include <errno.h>
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static inline void my_sem_op (int num, int op)
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{
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struct sembuf sb;
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again:
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sb.sem_num = num;
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sb.sem_op = op;
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sb.sem_flg = SEM_UNDO;
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if (semop (SHAREDRES_SEMID, &sb, 1) == -1) {
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if (errno == EINTR) {
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goto again;
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}
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}
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}
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#define lock_draw_sem() my_sem_op(_IDX_SEM_DRAW, -1)
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#define unlock_draw_sem() my_sem_op(_IDX_SEM_DRAW, 1)
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#define lock_scr_sem() my_sem_op(_IDX_SEM_SCR, -1)
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#define unlock_scr_sem() my_sem_op(_IDX_SEM_SCR, 1)
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#ifdef _MGHAVE_CURSOR
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#define lock_cursor_sem() my_sem_op(_IDX_SEM_CURSOR, -1)
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#define unlock_cursor_sem() my_sem_op(_IDX_SEM_CURSOR, 1)
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static inline int get_sem_pid (int num)
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{
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int pid;
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union semun ignored;
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pid = semctl (SHAREDRES_SEMID, num, GETPID, ignored);
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#ifdef _DEBUG
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if (pid == -1)
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perror ("get_sem_pid");
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#endif
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return pid;
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}
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#define get_cursor_sem_pid() get_sem_pid(_IDX_SEM_CURSOR)
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static inline int get_hidecursor_sem_val (void)
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{
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int val;
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union semun ignored;
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val = semctl (SHAREDRES_SEMID, _IDX_SEM_HIDECOUNT, GETVAL, ignored);
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#ifdef _DEBUG
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if (val == -1)
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perror ("get_hidecursor_sem_val");
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#endif
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return val;
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}
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static inline void reset_hidecursor_sem (void)
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{
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int ret;
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union semun sunion;
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sunion.val = 0;
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ret = semctl (SHAREDRES_SEMID, _IDX_SEM_HIDECOUNT, SETVAL, sunion) == -1;
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#ifdef _DEBUG
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if (ret == -1)
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perror ("reset_hidecursor_sem");
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#else
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ret = ret + 0;
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#endif
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}
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static inline void inc_hidecursor_sem (void)
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{
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struct sembuf sb;
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again:
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sb.sem_num = _IDX_SEM_HIDECOUNT;
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sb.sem_op = 1;
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sb.sem_flg = 0;
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if (semop (SHAREDRES_SEMID, &sb, 1) == -1) {
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if (errno == EINTR) {
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goto again;
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}
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}
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}
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#endif /* _MGHAVE_CURSOR */
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#ifdef _MGRM_PROCESSES
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# define lock_mousemove_sem() my_sem_op(_IDX_SEM_MOUSEMOVE, -1)
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# define unlock_mousemove_sem() my_sem_op(_IDX_SEM_MOUSEMOVE, 1)
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#endif /* _MGRM_PROCESSES */
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif // GUI_DRAWSEMOP_H
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