1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
|
/*
* Copyright (c) 2012, 2013, Joel Bodenmann aka Tectu <joel@unormal.org>
* Copyright (c) 2012, 2013, Andrew Hannam aka inmarket
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the <organization> nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* This demo shows how to create a static thread and how to terminate it
* after some period of time.
* A GTimer is used to termiate the thread.
*
* Note: The GOS API does not provide any function to terminate or kill a thread
* as not every operating system allows it to terminate a thread out
* from another one. Therefore, we use the parameters to implement a
* "fall over the edge" algorithm.
*/
#include "gfx.h"
GTimer gt;
gThread thd;
#if defined(WIN32)
#include <windows.h>
static DWORD nres;
// On Win32 don't use the C library fprintf or write as they crash.
// Maybe we just need to add the multi-thread C library options to the compile.
// Instead we use the Win32 API directly as that always works.
#define DEBUGWRITE(str) WriteFile(GetStdHandle(STD_ERROR_HANDLE), str, strlen(str), &nres, 0)
#else
#warning "You must alter this demo to define a DEBUGWRITE macro for your platform."
#warning "Be careful of using C library functions as they sometimes crash if they are not expecting stack changes (if possible use a multi-thread aware C library)"
#warning "You might flash LED's instead if that is better for your platform."
#error "--"
#endif
/*
* Thread function
* Prints a message
*/
gThreadreturn Thread_function(void* param)
{
/* Cast the paramter into a gBool pointer so we can use it */
gBool* doExit = (gBool*)param;
/* Execute this until we shall be terminated */
while (!*doExit) {
DEBUGWRITE("Message from Thread\n");
gfxSleepMilliseconds(500);
}
/* Don't return anything */
return (gThreadreturn)0;
}
/*
* Timer callback function
* Will be called when timer expires/fires
*/
void timerCallback(void* param)
{
/* Cast the paramter into a gBool pointer so we can use it */
gBool* threadExit = (gBool*)param;
/* Ask the Thread to fall over the end */
DEBUGWRITE("Closing thread!\n");
*threadExit = gTrue;
}
/*
* The main function
*/
int main(void)
{
gBool exitThread = gFalse;
gfxInit();
/* Initialize the timer */
gtimerInit(>);
/* Create a static thread from the default heap with normal priority.
* We pass a the parameter to the thread which tells the thread whether to return or not
*/
thd = gfxThreadCreate(NULL, 2048, gThreadpriorityNormal, Thread_function, (void*)&exitThread);
/* Start the timer. The callback function will be called once after 2000ms
* We will pass the thread handle as a parameter so the timer can ask the thread to terminate
*/
gtimerStart(>, timerCallback, (void*)&exitThread, gFalse, 2000);
while(1) {
DEBUGWRITE("Message from main!\n");
gfxSleepMilliseconds(500);
}
}
|
